General Description. Implementation of Relief Plan. Implementation of the split of the 760 NPA is as follows:



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Number: PL- 377 Date: May 7, 2008 Subject: 760 NPA; 2-way Split, Creating 442 NPA California Related Previous Planning Letters: PL-160, PL-194, PL-238 General Description On April 24, 2008, the California Public Utilities Commission (CPUC) in Decision D.08-04- 058 ordered a 2-way geographic split as the relief method for the 760 NPA, which serves the entire southeastern portion of the state. A copy of the CPUC order and other related Commission information can be obtained at: http://www.cpuc.gov. This planning letter replaces all previous planning letters mentioned above. As ordered by the Commission, the southwestern region of the existing 760 NPA will change to the new 442 NPA and the remaining areas will retain the 760 NPA. Some of the areas that will continue to be served by the NPA 760 include such communities as Bishop, Brawley, Bridgeport, Blythe, Calipatria, Calexico, El Centro, Holtville, Imperial, Indio, Mammoth Lakes, Needles, Ocotillo, Palm Springs, Parker Dam, Ridgecrest, Salton, Victorville, and Winterhaven. These communities will retain the 760 NPA. The new 442 NPA will serve the remaining portion of the existing 760 NPA. Some of the areas to be served by the new 442 NPA will consist of such communities as Borrego Springs, Camp Pendleton, Carlsbad, Encinitas, Escondido, Fallbrook, Julian, Oceanside, Pauma Valley, Ramona, San Marcos, Valley Center, Vista and Warner Springs. These communities will change to the 442 NPA. Implementation of Relief Plan Implementation of the split of the 760 NPA is as follows: Start of permissive dialing and latest date for all carriers to activate new NPA code End of permissive dialing and start of mandatory dialing of the new NPA Earliest date for the end of recorded announcement Time Date 12:01 AM Pacific November 8, 2008 12:01 AM Pacific May 16, 2009 - August 8, 2009 First date codes from the new NPA may be - February 8, 2009 ordered through NANPA During the permissive dialing period, either the 760 or the new 442 NPA code will be acceptable in a dialed number terminating in the new 442 NPA. After the permissive period

ends on May 16, 2009, all calls dialed with the incorrect NPA code will be routed to intercept recording through August 8, 2009. Central Office Code Listings and NPA Map Attached is a listing of rate centers for each NPA and listings of the central office codes and rate centers that will remain in the 760 NPA and those that will move to the new 442 NPA sorted by NXX and by rate center. This information is current as of May 1, 2008. Since NXX information may change over time, please consult the NANPA website at www.nanpa.com, the Local Exchange Routing Guide (LERG) or the NXX Activity Guide (NNAG) for updated information. Information in the LERG and NNAG is available by license contract from Telcordia Routing Administration (TRA), at 732-699-6700. The attached map identifies the NPA boundaries after the 2-way split. Dialing Plan At the beginning of mandatory dialing on May 16, 2009 the dialing plan for the 760 and 442 NPAs will be as follows: Type of call Call terminating to Dialing plan Local & Toll Home NPA (HNPA) 7-digits (NXX-XXXX) Local & Toll Foreign NPA (FNPA) 1+10-digits (1+NPA-NXX-XXXX) Operator Services Credit card, collect, third party HNPA or FNPA 0 + 10-digits (0 + NPA-NXX-XXXX) Network Testing All international and domestic carriers should ensure that the new 442 NPA has been activated throughout their networks prior to November 8, 2008. The test number to verify the routing to the new NPA will be in service beginning August 8, 2008 through August 8, 2009. The test number to verify the routing to the 442 NPA is: 442-442-1442. A recorded announcement will indicate that the test call has been successfully completed. General Information The information in this planning letter reflects detailed information about NPA relief activities. The information has been derived from commission orders and from industry implementation decisions. The implementation of the plan described in this letter is the responsibility of individual service providers, and NANPA does not guarantee that the activities and plans will occur exactly as described herein. Contact Information General questions regarding the relief of the NPA 760 should be directed to Joe Cocke, Senior NPA Relief Planner - NANPA, on 805-520-1945. Questions of a technical nature should be directed to the NPA coordinator of the appropriate service provider. 2

Attached is a list of company and contact information that is provided to assist in the implementation of the relief plan described herein. Because this information is subject to change, NANPA cannot guarantee the completeness or the accuracy of the attached list. NPA RELIEF PROJECT COORDINATORS NAME COMPANY TELEPHONE EMAIL ID Alexandra Hanson o1 Communications 916-554-2115 ahanson@o1.com George Guerra AT&T 408-493-8507 Gg2395@att.com Wes Jackert AT&T-M 562-468-8742 Wj8393@att.com Stacie Houghton Cbeyond 678-424-2463 Stacie.houghton@hotmail.com Holly Kuester Betty Parks Esther Northrup John Ceballos Valerie Endlich Charter Communications CommPartners Connect Cox California Telcom Cox California Telcom Cricket Communications 314-288-3353 Holly.kuester@chartercom.com 702-367-8647 Ext 1011 bparks@commpartnersconnect.com 619-266-5315 Esther.northrup@cox.com 619-266-5585 John.ceballos@cox.com 858-882-6396 vendlich@cricketcommunications.com Ruben Hernandez Ft. Mojave Telecom 928-346-2500 rhernandez@ftmojave.com Leslie Miklos Level 3 Communications 724-743-9656 Leslie.miklos@level3.com Lynne Martinez Pac West 209-926-3235 lmartin@pacwest.com Christina Philips Pacific Centrex Svcs. 818-487-3671 christina@datavo.com Michael Schelin Shelcomm 626-276-9009 mike@shelcomm.com Karen Riepenkroger Sprint-Nextel 913-762-4088 Karen.S.Riepenkroger@sprint.com Paula Jordan T-Mobile 925-325-3325 Paula.jordan@t-mobile.com Gail Long TDS Telecom 503-656-8399 Gail.long@tdstelecom.com Paul Nejedlo TDS Telecom 608-664-4659 Paul.nejedlo@tdstelecom.com Maureen Matthews Marc O Krent Lori Morris Telscape Communications The Telephone Connection Time Warner Telecom 626-415-1050 mmatthews@telscape.net 310-789-7979 mok@ttcmail.net 303-542-4111 Lori.morris@twtelecom.com Gary Wengrofsky Time Warner Cable 203-351-2147 Gary.wengrofsky@twcable.com Charlie Sadler USA Mobility 972-801-1624 Charlie.sadler@usamobility.com Lorraine Kocen Verizon 805-372-6945 Lorraine.kocen@verizon.com 3

Debra Gooden Verizon Business 972-729-6855 Debra.gooden@verizonbusiness.com Louie DeCarlo Verizon Business 415-228-2133 Louie.decarlo@verizonbusiness.com Gwen Zahn Verizon Wireless 412-496-6228 Gwen.zahn@verizonwireless.com Lorenzo Fulinara Verizon Wireless 949-286-8402 Lorenzo.fulinara@verizonwireless.com 760 NPA Geographic Split 70 Rate Centers remain in 760 NPA: Baker, Barstow, Barstow-Yermo D A, Benton, Big Pine, Bishop, Blythe, Boron, Brawley, Bridgeport, Calexico, California City, California Village, Calipatria, Cima, Crowley Lake, Death Valley, Desert Center, Desert Hot Springs, Eagle Mountain, Earp:Earp D A, Earp:Lost Lake D A, El Centro, El Mirage, Fort Irwin, Havasu Lake, Holtville, Homestead Valley, Imperial, Independence, Indio, Inyokern, Joshua Tree, June Lake, Kernville, Lake Isabella, Lee Vining, Lenwood, Lone Pine, Lucerne Valley, Mammoth Lakes, Morongo Valley, Mountain Pass, Needles, Newberry, Ocotillo, Olancha, Palm Desert, Palm Springs, Palo Verde, Parker Dam, Pine Creek, Pinyon, Randsburg, Ridgecrest, Salton, Sandy Valley, Shoshone, Summit Valley, Trona, Twentynine Palms, Victorville, Victorville/Adelanto, Victorville/Apple Valley, Victorville/Hesparia, Weldon, Winterhaven, Wrightwood, Wrightwood/Phelan and Yucca Valley. 14 Rate Centers change to 442 NPA: Borrego, Encinitas, Escondido, Fallbrook, Julian, Oceanside:Carlsbad D A, Oceanside:Oceanside D A, Oceanside:Pendleton D A, Pauma Valley, Ramona, San Marcos, Valley Center, Vista and Warner Springs. 4

760 NPA and 442 NPA Rate Center Map Bridgeport Lee Vining June Lake Inyo National Forest Mammoth Lakes Benton Crowley Lake Pine Creek Bishop Big Pine Independence Palm Springs Palm Desert Oceanside: Indio Pendleton Da Pinyon Pauma Valley Borrego Bad Lands Warner Springs Oceanside: Valley Center Oceanside Da Vista Borrego Salton Oceanside: San Marcos Escondido Carlsbad Da Ramona Julian West Mesa Encinitas 442 NPA Anza Borredo Desert State Park Ocotillo Smugglers Cave Eagle Mountain Desert Center Calipatria Brawley Imperial Holtville El Centro Calexico Lone Pine Death Valley National Park Death Valley Olancha 760 NPA Kernville Lake Isabella Weldon Inyokern Ridgecrest Randsburg Trona Fort Irwin Shoshone Sandy Valley Mountain Pass Boron Lenwood California City Gravel Hills Cima 760 NPA and 442 Map Legend NPA Boundaries Rate Center Boundaries Split Line Barstow Yermo Da Victorville/Adelanto California Village Barstow Newberry Needles Victorville El Mirage Baker Victorville/Apple Valley Wrightwood/Phelan Lucerne Valley Victorville/Hesperia Havasu Lake Wrightwood Homestead Valley Twentynine Palms Parker Dam Summit Valley Yucca Valley Earp:Earp Da Morongo ValleyJoshua Tree Earp:Lost Lake Da Desert Hot Springs Palm Springs Eagle Mountain Desert Center Palm Desert Blythe Oceanside: Indio Pendleton Da Pinyon Chocolate Mountains Fallbrook Pauma Valley Borrego Bad Lands Palo Verde Oceanside: Warner Springs Oceanside Da Vista Valley Center Borrego Salton Oceanside: San Marcos Calipatria Carlsbad Da Escondido Ramona Julian Brawley Encinitas West Mesa Winterhaven Holtville Anza Borredo Desert State Park Imperial Ocotillo El Centro Smugglers Cave Calexico 442 NPA Produced by CDS Business Mapping 04/2008

NXX Codes Moving to 442 NPA Sorted by NXX 201 VISTA 414 VISTA 504 ESCONDIDO 204 SAN MARCOS 415 VISTA 505 VISTA 207 VISTA 419 VISTA 509 VISTA 208 VISTA 420 VISTA 510 SAN MARCOS 210 VISTA 421 OCSD OCSD 512 OCSD PDTN 212 VISTA 429 OCSD OCSD 516 ENCINITAS 213 VISTA 430 OCSD PDTN 517 OCSD CRLS 214 VISTA 431 OCSD CRLS 518 VISTA 215 ESCONDIDO 432 ESCONDIDO 519 VISTA 216 VISTA 433 OCSD OCSD 520 ESCONDIDO 224 VISTA 434 OCSD OCSD 521 OCSD OCSD 225 ESCONDIDO 435 OCSD OCSD 522 ESCONDIDO 230 ENCINITAS 436 ENCINITAS 525 VISTA 231 OCSD OCSD 438 OCSD CRLS 526 OCSD OCSD 233 ESCONDIDO 439 OCSD OCSD 527 JULIAN 236 FALLBROOK 440 RAMONA 528 ENCINITAS 237 OCSD PDTN 443 ESCONDIDO 529 OCSD OCSD 239 RAMONA 444 OCSD CRLS 532 ESCONDIDO 260 JULIAN 445 ESCONDIDO 533 ESCONDIDO 268 OCSD CRLS 448 OCSD CRLS 535 ESCONDIDO 270 ESCONDIDO 450 OCSD OCSD 536 VISTA 271 OCSD CRLS 451 FALLBROOK 539 SAN MARCOS 274 ENCINITAS 452 ENCINITAS 542 VISTA 277 OCSD OCSD 453 OCSD OCSD 543 OCSD PDTN 283 OCSD OCSD 454 ENCINITAS 546 ESCONDIDO 286 ENCINITAS 456 ENCINITAS 547 OCSD OCSD 290 SAN MARCOS 458 OCSD OCSD 551 RAMONA 291 ESCONDIDO 465 BORREGO 557 ENCINITAS 293 OCSD PDTN 466 ESCONDIDO 558 VISTA 294 ESCONDIDO 467 ESCONDIDO 560 VISTA 295 VISTA 468 FALLBROOK 566 SAN MARCOS 297 VALLEY CTR 470 VISTA 571 SAN MARCOS 300 ESCONDIDO 471 SAN MARCOS 575 OCSD PDTN 304 SAN MARCOS 472 OCSD PDTN 576 OCSD OCSD 305 VISTA 473 OCSD CRLS 579 OCSD CRLS 310 VISTA 476 OCSD CRLS 580 ESCONDIDO 313 RAMONA 477 VISTA 583 OCSD OCSD 315 RAMONA 479 ENCINITAS 585 OCSD CRLS 317 ESCONDIDO 480 ESCONDIDO 586 OCSD OCSD 330 VISTA 481 SAN MARCOS 591 SAN MARCOS 331 OCSD CRLS 484 ESCONDIDO 593 SAN MARCOS 334 ENCINITAS 487 ENCINITAS 594 ESCONDIDO 338 ESCONDIDO 489 ESCONDIDO 597 VISTA 385 OCSD PDTN 492 ENCINITAS 598 VISTA 390 VISTA 494 OCSD CRLS 599 VISTA 400 OCSD OCSD 496 OCSD CRLS 602 OCSD CRLS 402 ENCINITAS 497 ESCONDIDO 603 OCSD CRLS 405 OCSD OCSD 498 ESCONDIDO 607 OCSD CRLS 407 VISTA 500 VISTA 612 SNDG SNDG 410 SAN MARCOS 503 OCSD OCSD 613 ENCINITAS NANPA CO Code Administration Data as of 05/01/08 1 of 3

NXX Codes Moving to 442 NPA Sorted by NXX 615 PAUMA VLY 716 VISTA 795 OCSD CRLS 621 SAN MARCOS 717 OCSD OCSD 796 ESCONDIDO 622 OCSD OCSD 720 OCSD OCSD 798 SAN MARCOS 630 VISTA 721 OCSD OCSD 801 ESCONDIDO 631 VISTA 722 OCSD OCSD 802 ESCONDIDO 632 ENCINITAS 723 FALLBROOK 803 ESCONDIDO 633 ENCINITAS 724 VISTA 804 OCSD CRLS 634 ENCINITAS 725 OCSD PDTN 805 OCSD OCSD 635 ENCINITAS 726 VISTA 806 VISTA 637 OCSD OCSD 727 VISTA 807 ESCONDIDO 638 VALLEY CTR 728 FALLBROOK 809 ENCINITAS 639 VISTA 729 OCSD OCSD 814 OCSD CRLS 642 ENCINITAS 730 OCSD OCSD 815 ENCINITAS 643 VISTA 731 FALLBROOK 818 OCSD CRLS 644 ESCONDIDO 732 VISTA 822 VISTA 645 FALLBROOK 734 VISTA 823 JULIAN 649 OCSD OCSD 735 ESCONDIDO 825 RAMONA 650 VISTA 736 SAN MARCOS 826 OCSD OCSD 651 VALLEY CTR 737 ESCONDIDO 827 OCSD CRLS 652 ENCINITAS 738 ESCONDIDO 828 OCSD OCSD 653 SAN MARCOS 739 ESCONDIDO 829 OCSD PDTN 654 RAMONA 740 ESCONDIDO 839 ESCONDIDO 655 OCSD PDTN 741 ESCONDIDO 840 ENCINITAS 658 ESCONDIDO 742 PAUMA VLY 842 VISTA 661 SAN MARCOS 743 ESCONDIDO 845 OCSD CRLS 666 VISTA 744 SAN MARCOS 846 ENCINITAS 670 ESCONDIDO 745 ESCONDIDO 847 OCSD PDTN 672 OCSD OCSD 746 ESCONDIDO 850 OCSD OCSD 675 OCSD PDTN 747 ESCONDIDO 855 ESCONDIDO 681 OCSD OCSD 748 BORREGO 857 BORREGO 682 SAN MARCOS 749 VALLEY CTR 859 OCSD OCSD 683 OCSD CRLS 750 SAN MARCOS 860 JULIAN 685 VISTA 751 VALLEY CTR 870 RAMONA 687 OCSD OCSD 752 SAN MARCOS 871 ESCONDIDO 688 OCSD CRLS 753 ENCINITAS 877 ESCONDIDO 689 FALLBROOK 754 OCSD OCSD 884 ESCONDIDO 690 ESCONDIDO 755 ESCONDIDO 888 ESCONDIDO 692 OCSD CRLS 757 OCSD OCSD 889 OCSD CRLS 695 FALLBROOK 758 VISTA 891 SAN MARCOS 696 OCSD OCSD 759 SAN MARCOS 892 WARNER SPG 697 ENCINITAS 761 SAN MARCOS 896 RAMONA 703 ESCONDIDO 763 OCSD PDTN 901 OCSD OCSD 704 ENCINITAS 765 JULIAN 907 WARNER SPG 705 ESCONDIDO 767 BORREGO 908 OCSD OCSD 707 OCSD CRLS 781 ESCONDIDO 913 VALLEY CTR 708 ESCONDIDO 782 WARNER SPG 916 SAN MARCOS 710 OCSD CRLS 783 ENCINITAS 917 VISTA 712 OCSD OCSD 787 RAMONA 918 OCSD CRLS 714 VISTA 788 RAMONA 926 VISTA 715 ESCONDIDO 789 RAMONA 929 OCSD CRLS NANPA CO Code Administration Data as of 05/01/08 2 of 3

NXX Codes Moving to 442 NPA Sorted by NXX 930 OCSD CRLS 931 OCSD CRLS 936 VISTA 940 VISTA 941 VISTA 942 ENCINITAS 943 ENCINITAS 944 ENCINITAS 945 VISTA 966 OCSD OCSD 967 OCSD OCSD 975 ESCONDIDO 978 OCSD OCSD 986 JULIAN 990 FALLBROOK 994 OCSD OCSD NANPA CO Code Administration Data as of 05/01/08 3 of 3

NXX Codes Moving to 442 NPA Sorted by Rate Center 465 BORREGO 467 ESCONDIDO 645 FALLBROOK 748 BORREGO 480 ESCONDIDO 689 FALLBROOK 767 BORREGO 484 ESCONDIDO 695 FALLBROOK 857 BORREGO 489 ESCONDIDO 723 FALLBROOK 230 ENCINITAS 497 ESCONDIDO 728 FALLBROOK 274 ENCINITAS 498 ESCONDIDO 731 FALLBROOK 286 ENCINITAS 504 ESCONDIDO 990 FALLBROOK 334 ENCINITAS 520 ESCONDIDO 260 JULIAN 402 ENCINITAS 522 ESCONDIDO 527 JULIAN 436 ENCINITAS 532 ESCONDIDO 765 JULIAN 452 ENCINITAS 533 ESCONDIDO 823 JULIAN 454 ENCINITAS 535 ESCONDIDO 860 JULIAN 456 ENCINITAS 546 ESCONDIDO 986 JULIAN 479 ENCINITAS 580 ESCONDIDO 268 OCSD CRLS 487 ENCINITAS 594 ESCONDIDO 271 OCSD CRLS 492 ENCINITAS 644 ESCONDIDO 331 OCSD CRLS 516 ENCINITAS 658 ESCONDIDO 431 OCSD CRLS 528 ENCINITAS 670 ESCONDIDO 438 OCSD CRLS 557 ENCINITAS 690 ESCONDIDO 444 OCSD CRLS 613 ENCINITAS 703 ESCONDIDO 448 OCSD CRLS 632 ENCINITAS 705 ESCONDIDO 473 OCSD CRLS 633 ENCINITAS 708 ESCONDIDO 476 OCSD CRLS 634 ENCINITAS 715 ESCONDIDO 494 OCSD CRLS 635 ENCINITAS 735 ESCONDIDO 496 OCSD CRLS 642 ENCINITAS 737 ESCONDIDO 517 OCSD CRLS 652 ENCINITAS 738 ESCONDIDO 579 OCSD CRLS 697 ENCINITAS 739 ESCONDIDO 585 OCSD CRLS 704 ENCINITAS 740 ESCONDIDO 602 OCSD CRLS 753 ENCINITAS 741 ESCONDIDO 603 OCSD CRLS 783 ENCINITAS 743 ESCONDIDO 607 OCSD CRLS 809 ENCINITAS 745 ESCONDIDO 683 OCSD CRLS 815 ENCINITAS 746 ESCONDIDO 688 OCSD CRLS 840 ENCINITAS 747 ESCONDIDO 692 OCSD CRLS 846 ENCINITAS 755 ESCONDIDO 707 OCSD CRLS 942 ENCINITAS 781 ESCONDIDO 710 OCSD CRLS 943 ENCINITAS 796 ESCONDIDO 795 OCSD CRLS 944 ENCINITAS 801 ESCONDIDO 804 OCSD CRLS 215 ESCONDIDO 802 ESCONDIDO 814 OCSD CRLS 225 ESCONDIDO 803 ESCONDIDO 818 OCSD CRLS 233 ESCONDIDO 807 ESCONDIDO 827 OCSD CRLS 270 ESCONDIDO 839 ESCONDIDO 845 OCSD CRLS 291 ESCONDIDO 855 ESCONDIDO 889 OCSD CRLS 294 ESCONDIDO 871 ESCONDIDO 918 OCSD CRLS 300 ESCONDIDO 877 ESCONDIDO 929 OCSD CRLS 317 ESCONDIDO 884 ESCONDIDO 930 OCSD CRLS 338 ESCONDIDO 888 ESCONDIDO 931 OCSD CRLS 432 ESCONDIDO 975 ESCONDIDO 231 OCSD OCSD 443 ESCONDIDO 236 FALLBROOK 277 OCSD OCSD 445 ESCONDIDO 451 FALLBROOK 283 OCSD OCSD 466 ESCONDIDO 468 FALLBROOK 400 OCSD OCSD NANPA CO Code Administration Data as of 05/01/08 1 of 3

NXX Codes Moving to 442 NPA Sorted by Rate Center 405 OCSD OCSD 512 OCSD PDTN 638 VALLEY CTR 421 OCSD OCSD 543 OCSD PDTN 651 VALLEY CTR 429 OCSD OCSD 575 OCSD PDTN 749 VALLEY CTR 433 OCSD OCSD 655 OCSD PDTN 751 VALLEY CTR 434 OCSD OCSD 675 OCSD PDTN 913 VALLEY CTR 435 OCSD OCSD 725 OCSD PDTN 201 VISTA 439 OCSD OCSD 763 OCSD PDTN 207 VISTA 450 OCSD OCSD 829 OCSD PDTN 208 VISTA 453 OCSD OCSD 847 OCSD PDTN 210 VISTA 458 OCSD OCSD 615 PAUMA VLY 212 VISTA 503 OCSD OCSD 742 PAUMA VLY 213 VISTA 521 OCSD OCSD 239 RAMONA 214 VISTA 526 OCSD OCSD 313 RAMONA 216 VISTA 529 OCSD OCSD 315 RAMONA 224 VISTA 547 OCSD OCSD 440 RAMONA 295 VISTA 576 OCSD OCSD 551 RAMONA 305 VISTA 583 OCSD OCSD 654 RAMONA 310 VISTA 586 OCSD OCSD 787 RAMONA 330 VISTA 622 OCSD OCSD 788 RAMONA 390 VISTA 637 OCSD OCSD 789 RAMONA 407 VISTA 649 OCSD OCSD 825 RAMONA 414 VISTA 672 OCSD OCSD 870 RAMONA 415 VISTA 681 OCSD OCSD 896 RAMONA 419 VISTA 687 OCSD OCSD 204 SAN MARCOS 420 VISTA 696 OCSD OCSD 290 SAN MARCOS 470 VISTA 712 OCSD OCSD 304 SAN MARCOS 477 VISTA 717 OCSD OCSD 410 SAN MARCOS 500 VISTA 720 OCSD OCSD 471 SAN MARCOS 505 VISTA 721 OCSD OCSD 481 SAN MARCOS 509 VISTA 722 OCSD OCSD 510 SAN MARCOS 518 VISTA 729 OCSD OCSD 539 SAN MARCOS 519 VISTA 730 OCSD OCSD 566 SAN MARCOS 525 VISTA 754 OCSD OCSD 571 SAN MARCOS 536 VISTA 757 OCSD OCSD 591 SAN MARCOS 542 VISTA 805 OCSD OCSD 593 SAN MARCOS 558 VISTA 826 OCSD OCSD 621 SAN MARCOS 560 VISTA 828 OCSD OCSD 653 SAN MARCOS 597 VISTA 850 OCSD OCSD 661 SAN MARCOS 598 VISTA 859 OCSD OCSD 682 SAN MARCOS 599 VISTA 901 OCSD OCSD 736 SAN MARCOS 630 VISTA 908 OCSD OCSD 744 SAN MARCOS 631 VISTA 966 OCSD OCSD 750 SAN MARCOS 639 VISTA 967 OCSD OCSD 752 SAN MARCOS 643 VISTA 978 OCSD OCSD 759 SAN MARCOS 650 VISTA 994 OCSD OCSD 761 SAN MARCOS 666 VISTA 237 OCSD PDTN 798 SAN MARCOS 685 VISTA 293 OCSD PDTN 891 SAN MARCOS 714 VISTA 385 OCSD PDTN 916 SAN MARCOS 716 VISTA 430 OCSD PDTN 612 SNDG SNDG 724 VISTA 472 OCSD PDTN 297 VALLEY CTR 726 VISTA NANPA CO Code Administration Data as of 05/01/08 2 of 3

NXX Codes Moving to 442 NPA Sorted by Rate Center 727 VISTA 732 VISTA 734 VISTA 758 VISTA 806 VISTA 822 VISTA 842 VISTA 917 VISTA 926 VISTA 936 VISTA 940 VISTA 941 VISTA 945 VISTA 782 WARNER SPG 892 WARNER SPG 907 WARNER SPG NANPA CO Code Administration Data as of 05/01/08 3 of 3

NXX Codes Remaining in 760 NPA Sorted by NXX 200 PALMDESERT 273 EARP 346 PALMDESERT 202 PALM SPG 275 PALM SPG 347 INDIO 203 BRIDGEPORT 276 PARKER DAM 348 CALIPATRIA 205 DESERT CTR 278 BLYTHE 349 PINYON 206 LEE VINING 279 OLANCHA 350 KERNVILLE 209 JUNE LAKE 280 NEWBERRY 351 BRAWLEY 217 VICTORVL 281 WRIGHTWOOD 352 EL CENTRO 218 PALM SPG 282 BARSTOW 353 EL CENTRO 219 PALM SPG 284 CALIFORNCY 354 CALIPATRIA 220 VICTORVL 285 PALM SPG 355 IMPERIAL 221 VICTORVL 287 EL CENTRO 356 HOLTVILLE 222 EL CENTRO 288 DSERTHTSPG 357 CALEXICO 223 LKISABELLA 289 INDIO 358 OCOTILLO 226 VICTORVL 292 PALM SPG 359 CALIPATRIA 227 DESERT CTR 296 INDIO 360 PALMDESERT 228 YUCCA VLY 299 WELDON 361 TWNTYNPLMS 229 PALMDESERT 301 RIDGECREST 362 TWNTYNPLMS 232 PINE CREEK 302 TRONA 363 MORONGOVLY 234 EL CENTRO 303 RANDSBURG 364 HOMESTDVLY 235 EL CENTRO 306 BORON 365 YUCCA VLY 238 INDIO 307 LENWOOD 366 JOSHUATREE 240 VTVL APVY 308 BARSTOW 367 TWNTYNPLMS 241 VICTORVL 309 NEWBERRY 368 TWNTYNPLMS 242 VTVL APVY 312 EL CENTRO 369 YUCCA VLY 243 VICTORVL 314 EL MIRAGE 370 EL CENTRO 244 VTVL HSPR 316 WRIGHTWOOD 371 RIDGECREST 245 VICTORVL 318 PALM SPG 372 TRONA 246 VTVL ADLN 319 PALM SPG 373 CALIFORNCY 247 VTVL APVY 320 PALM SPG 374 RANDSBURG 248 LUCERNEVLY 321 PALM SPG 375 RIDGECREST 249 WRIGHTWOOD 322 PALM SPG 376 KERNVILLE 250 PALM SPG 323 PALM SPG 377 INYOKERN 251 DSERTHTSPG 324 PALM SPG 378 WELDON 252 BARSTOW 325 PALM SPG 379 LKISABELLA 253 LENWOOD 326 NEEDLES 380 FORT IRWIN 254 BRSW YERM 327 PALM SPG 381 VICTORVL 255 BARSTOW 328 PALM SPG 382 RIDGECREST 256 BARSTOW 329 DSERTHTSPG 383 FORT IRWIN 257 NEWBERRY 332 EL CENTRO 384 RIDGECREST 258 BISHOP 333 PALM SPG 386 FORT IRWIN 259 EL CENTRO 335 EL CENTRO 387 PINE CREEK 261 VICTORVL 336 EL CENTRO 388 EL MIRAGE 262 INDIO 337 EL CENTRO 389 SUMMIT VLY 263 BIG PINE 339 EL CENTRO 391 INDIO 264 LONE PINE 340 PALMDESERT 392 EAGLE MT 265 VICTORVL 341 PALMDESERT 393 INDIO 266 SHOSHONE 342 INDIO 394 SALTON 267 BARSTOW 343 PALMDESERT 395 SALTON 269 VICTORVL 344 BRAWLEY 396 INDIO 272 PALM SPG 345 PALMDESERT 397 INDIO NANPA CO Code Administration Data as of 05/01/08 1 of 3

NXX Codes Remaining in 760 NPA Sorted by NXX 398 INDIO 513 VICTORVL 619 INDIO 399 INDIO 514 CALIFORNCY 623 YUCCA VLY 401 TWNTYNPLMS 523 VTVL ADLN 624 CALIPATRIA 403 VICTORVL 524 VICTORVL 625 INDIO 404 PALMDESERT 530 VTVL ADLN 627 EARP 406 PALM SPG 531 WELDON 628 VICTORVL 408 PALM SPG 534 PALM SPG 629 CALIF VLGE 409 PALM SPG 538 SALTON 636 PALMDESERT 412 BRAWLEY 540 EL CENTRO 640 BLYTHE 413 PALM SPG 541 INDIO 641 PALM SPG 416 PALM SPG 544 BLYTHE 646 VTVL APVY 417 LKISABELLA 545 IMPERIAL 647 LEE VINING 418 YUCCA VLY 548 EL CENTRO 648 JUNE LAKE 422 PALM SPG 549 LKISABELLA 657 SANDY VLLY 423 PALMDESERT 550 BRAWLEY 660 DSERTHTSPG 424 PALM SPG 553 VICTORVL 662 VTVL HSPR 425 EL CENTRO 554 EL CENTRO 663 PARKER DAM 426 BARSTOW 556 EL CENTRO 664 EARP LSLK 427 EL CENTRO 559 VICTORVL 665 EARP 428 EL MIRAGE 561 VTVL ADLN 667 PALM SPG 437 DESERT CTR 562 EL CENTRO 668 PALM SPG 441 EL CENTRO 563 WRWD PHLN 669 VTVL HSPR 446 RIDGECREST 564 INDIO 671 DSERTHTSPG 447 BARSTOW 567 PALM SPG 673 PALM SPG 449 PALM SPG 568 PALMDESERT 674 PALMDESERT 455 EL CENTRO 572 WINTERHVN 676 DSERTHTSPG 457 IMPERIAL 573 PALMDESERT 677 RIDGECREST 460 EL CENTRO 574 INDIO 679 EL CENTRO 461 RIDGECREST 577 BARSTOW 680 VTVL HSPR 462 DEATH VLY 578 PALMDESERT 684 VICTORVL 463 EL CENTRO 581 WRIGHTWOOD 686 VICTORVL 464 PALM SPG 582 BISHOP 693 EL CENTRO 469 PALMDESERT 584 VICTORVL 694 VICTORVL 474 EL MIRAGE 587 BRAWLEY 699 PALM SPG 475 VICTORVL 588 FORT IRWIN 701 EL MIRAGE 478 KERNVILLE 589 DEATH VLY 702 INDIO 482 EL CENTRO 590 BARSTOW 706 VICTORVL 483 IMPERIAL 592 EL CENTRO 709 MAMMOTHLKS 485 INDIO 595 EL CENTRO 713 VTVL HSPR 486 VICTORVL 596 VICTORVL 718 BARSTOW 488 VTVL HSPR 601 PALMDESERT 733 BAKER 490 VICTORVL 604 EL CENTRO 756 HOLTVILLE 491 BORON 605 VICTORVL 762 BORON 493 TWNTYNPLMS 606 VICTORVL 764 OLANCHA 495 RIDGECREST 608 RIDGECREST 766 PALMDESERT 499 RIDGECREST 610 PALMDESERT 768 CALEXICO 502 CALIPATRIA 614 LONE PINE 769 BORON 506 VICTORVL 616 BRIDGEPORT 770 PALM SPG 507 PALM SPG 617 VICTORVL 771 INDIO 508 VICTORVL 618 CALEXICO 772 PALMDESERT NANPA CO Code Administration Data as of 05/01/08 2 of 3

NXX Codes Remaining in 760 NPA Sorted by NXX 773 PALMDESERT 866 PALM SPG 954 VICTORVL 774 PALM SPG 867 EL CENTRO 955 VICTORVL 775 INDIO 868 WRWD PHLN 956 VTVL HSPR 776 PALMDESERT 869 PALM SPG 957 BARSTOW 777 INDIO 872 BISHOP 960 EL CENTRO 778 PALM SPG 873 BISHOP 961 VTVL APVY 779 PALMDESERT 874 BISHOP 962 VICTORVL 780 VICTORVL 875 LONE PINE 963 VICTORVL 784 BISHOP 876 LONE PINE 964 VICTORVL 785 BRAWLEY 878 INDEPNDNCE 965 MAMMOTHLKS 786 DEATH VLY 880 PALM SPG 968 PALM SPG 791 EL CENTRO 881 VICTORVL 969 PALM SPG 792 VICTORVL 882 RANDSBURG 971 PALO VERDE 793 RIDGECREST 883 PALM SPG 972 INDIO 794 PALM SPG 885 VICTORVL 973 FORT IRWIN 797 PALMDESERT 886 EL CENTRO 974 JOSHUATREE 799 PALM SPG 887 VICTORVL 977 RIDGECREST 808 PALM SPG 890 CALEXICO 981 VTVL HSPR 810 VTVL APVY 897 EL CENTRO 982 VTVL HSPR 812 LKISABELLA 898 PALM SPG 983 VTVL HSPR 813 VTVL APVY 899 INDIO 985 VICTORVL 816 VICTORVL 900 VICTORVL 987 VICTORVL 817 VICTORVL 902 PALM SPG 988 BARSTOW 819 TWNTYNPLMS 903 NEEDLES 989 INDIO 820 YUCCA VLY 904 PALM SPG 992 PALM SPG 821 JOSHUATREE 910 TWNTYNPLMS 996 EL CENTRO 824 LUCERNEVLY 912 VICTORVL 997 BARSTOW 830 TWNTYNPLMS 914 MAMMOTHLKS 831 PALM SPG 915 INDEPNDNCE 832 PALM SPG 920 BISHOP 833 PALM SPG 921 BLYTHE 834 PALMDESERT 922 BLYTHE 835 PALM SPG 923 MAMMOTHLKS 836 PALMDESERT 924 MAMMOTHLKS 837 PALMDESERT 927 VICTORVL 838 VICTORVL 928 CIMA 841 PALM SPG 932 BRIDGEPORT 843 VICTORVL 933 BENTON 844 PALM SPG 934 MAMMOTHLKS 849 BAKER 935 CROWLEY LK 851 PALMDESERT 937 BISHOP 852 SHOSHONE 938 BIG PINE 854 PALO VERDE 939 RIDGECREST 856 MT PASS 946 VTVL APVY 858 HAVASULAKE 947 VTVL HSPR 861 PALM SPG 948 VTVL HSPR 862 PALMDESERT 949 VTVL HSPR 863 INDIO 951 VICTORVL 864 PALM SPG 952 VICTORVL 865 TWNTYNPLMS 953 VICTORVL NANPA CO Code Administration Data as of 05/01/08 3 of 3

NXX Codes Remaining in 760 NPA Sorted by Rate Center 733 BAKER 629 CALIF VLGE 548 EL CENTRO 849 BAKER 284 CALIFORNCY 554 EL CENTRO 252 BARSTOW 373 CALIFORNCY 556 EL CENTRO 255 BARSTOW 514 CALIFORNCY 562 EL CENTRO 256 BARSTOW 348 CALIPATRIA 592 EL CENTRO 267 BARSTOW 354 CALIPATRIA 595 EL CENTRO 282 BARSTOW 359 CALIPATRIA 604 EL CENTRO 308 BARSTOW 502 CALIPATRIA 679 EL CENTRO 426 BARSTOW 624 CALIPATRIA 693 EL CENTRO 447 BARSTOW 928 CIMA 791 EL CENTRO 577 BARSTOW 935 CROWLEY LK 867 EL CENTRO 590 BARSTOW 462 DEATH VLY 886 EL CENTRO 718 BARSTOW 589 DEATH VLY 897 EL CENTRO 957 BARSTOW 786 DEATH VLY 960 EL CENTRO 988 BARSTOW 205 DESERT CTR 996 EL CENTRO 997 BARSTOW 227 DESERT CTR 314 EL MIRAGE 933 BENTON 437 DESERT CTR 388 EL MIRAGE 263 BIG PINE 251 DSERTHTSPG 428 EL MIRAGE 938 BIG PINE 288 DSERTHTSPG 474 EL MIRAGE 258 BISHOP 329 DSERTHTSPG 701 EL MIRAGE 582 BISHOP 660 DSERTHTSPG 380 FORT IRWIN 784 BISHOP 671 DSERTHTSPG 383 FORT IRWIN 872 BISHOP 676 DSERTHTSPG 386 FORT IRWIN 873 BISHOP 392 EAGLE MT 588 FORT IRWIN 874 BISHOP 273 EARP 973 FORT IRWIN 920 BISHOP 627 EARP 858 HAVASULAKE 937 BISHOP 665 EARP 356 HOLTVILLE 278 BLYTHE 664 EARP LSLK 756 HOLTVILLE 544 BLYTHE 222 EL CENTRO 364 HOMESTDVLY 640 BLYTHE 234 EL CENTRO 355 IMPERIAL 921 BLYTHE 235 EL CENTRO 457 IMPERIAL 922 BLYTHE 259 EL CENTRO 483 IMPERIAL 306 BORON 287 EL CENTRO 545 IMPERIAL 491 BORON 312 EL CENTRO 878 INDEPNDNCE 762 BORON 332 EL CENTRO 915 INDEPNDNCE 769 BORON 335 EL CENTRO 238 INDIO 344 BRAWLEY 336 EL CENTRO 262 INDIO 351 BRAWLEY 337 EL CENTRO 289 INDIO 412 BRAWLEY 339 EL CENTRO 296 INDIO 550 BRAWLEY 352 EL CENTRO 342 INDIO 587 BRAWLEY 353 EL CENTRO 347 INDIO 785 BRAWLEY 370 EL CENTRO 391 INDIO 203 BRIDGEPORT 425 EL CENTRO 393 INDIO 616 BRIDGEPORT 427 EL CENTRO 396 INDIO 932 BRIDGEPORT 441 EL CENTRO 397 INDIO 254 BRSW YERM 455 EL CENTRO 398 INDIO 357 CALEXICO 460 EL CENTRO 399 INDIO 618 CALEXICO 463 EL CENTRO 485 INDIO 768 CALEXICO 482 EL CENTRO 541 INDIO 890 CALEXICO 540 EL CENTRO 564 INDIO NANPA CO Code Administration Data as of 05/01/08 1 of 3

NXX Codes Remaining in 760 NPA Sorted by Rate Center 574 INDIO 764 OLANCHA 864 PALM SPG 619 INDIO 202 PALM SPG 866 PALM SPG 625 INDIO 218 PALM SPG 869 PALM SPG 702 INDIO 219 PALM SPG 880 PALM SPG 771 INDIO 250 PALM SPG 883 PALM SPG 775 INDIO 272 PALM SPG 898 PALM SPG 777 INDIO 275 PALM SPG 902 PALM SPG 863 INDIO 285 PALM SPG 904 PALM SPG 899 INDIO 292 PALM SPG 968 PALM SPG 972 INDIO 318 PALM SPG 969 PALM SPG 989 INDIO 319 PALM SPG 992 PALM SPG 377 INYOKERN 320 PALM SPG 200 PALMDESERT 366 JOSHUATREE 321 PALM SPG 229 PALMDESERT 821 JOSHUATREE 322 PALM SPG 340 PALMDESERT 974 JOSHUATREE 323 PALM SPG 341 PALMDESERT 209 JUNE LAKE 324 PALM SPG 343 PALMDESERT 648 JUNE LAKE 325 PALM SPG 345 PALMDESERT 350 KERNVILLE 327 PALM SPG 346 PALMDESERT 376 KERNVILLE 328 PALM SPG 360 PALMDESERT 478 KERNVILLE 333 PALM SPG 404 PALMDESERT 206 LEE VINING 406 PALM SPG 423 PALMDESERT 647 LEE VINING 408 PALM SPG 469 PALMDESERT 253 LENWOOD 409 PALM SPG 568 PALMDESERT 307 LENWOOD 413 PALM SPG 573 PALMDESERT 223 LKISABELLA 416 PALM SPG 578 PALMDESERT 379 LKISABELLA 422 PALM SPG 601 PALMDESERT 417 LKISABELLA 424 PALM SPG 610 PALMDESERT 549 LKISABELLA 449 PALM SPG 636 PALMDESERT 812 LKISABELLA 464 PALM SPG 674 PALMDESERT 264 LONE PINE 507 PALM SPG 766 PALMDESERT 614 LONE PINE 534 PALM SPG 772 PALMDESERT 875 LONE PINE 567 PALM SPG 773 PALMDESERT 876 LONE PINE 641 PALM SPG 776 PALMDESERT 248 LUCERNEVLY 667 PALM SPG 779 PALMDESERT 824 LUCERNEVLY 668 PALM SPG 797 PALMDESERT 709 MAMMOTHLKS 673 PALM SPG 834 PALMDESERT 914 MAMMOTHLKS 699 PALM SPG 836 PALMDESERT 923 MAMMOTHLKS 770 PALM SPG 837 PALMDESERT 924 MAMMOTHLKS 774 PALM SPG 851 PALMDESERT 934 MAMMOTHLKS 778 PALM SPG 862 PALMDESERT 965 MAMMOTHLKS 794 PALM SPG 854 PALO VERDE 363 MORONGOVLY 799 PALM SPG 971 PALO VERDE 856 MT PASS 808 PALM SPG 276 PARKER DAM 326 NEEDLES 831 PALM SPG 663 PARKER DAM 903 NEEDLES 832 PALM SPG 232 PINE CREEK 257 NEWBERRY 833 PALM SPG 387 PINE CREEK 280 NEWBERRY 835 PALM SPG 349 PINYON 309 NEWBERRY 841 PALM SPG 303 RANDSBURG 358 OCOTILLO 844 PALM SPG 374 RANDSBURG 279 OLANCHA 861 PALM SPG 882 RANDSBURG NANPA CO Code Administration Data as of 05/01/08 2 of 3

NXX Codes Remaining in 760 NPA Sorted by Rate Center 301 RIDGECREST 513 VICTORVL 662 VTVL HSPR 371 RIDGECREST 524 VICTORVL 669 VTVL HSPR 375 RIDGECREST 553 VICTORVL 680 VTVL HSPR 382 RIDGECREST 559 VICTORVL 713 VTVL HSPR 384 RIDGECREST 584 VICTORVL 947 VTVL HSPR 446 RIDGECREST 596 VICTORVL 948 VTVL HSPR 461 RIDGECREST 605 VICTORVL 949 VTVL HSPR 495 RIDGECREST 606 VICTORVL 956 VTVL HSPR 499 RIDGECREST 617 VICTORVL 981 VTVL HSPR 608 RIDGECREST 628 VICTORVL 982 VTVL HSPR 677 RIDGECREST 684 VICTORVL 983 VTVL HSPR 793 RIDGECREST 686 VICTORVL 299 WELDON 939 RIDGECREST 694 VICTORVL 378 WELDON 977 RIDGECREST 706 VICTORVL 531 WELDON 394 SALTON 780 VICTORVL 572 WINTERHVN 395 SALTON 792 VICTORVL 249 WRIGHTWOOD 538 SALTON 816 VICTORVL 281 WRIGHTWOOD 657 SANDY VLLY 817 VICTORVL 316 WRIGHTWOOD 266 SHOSHONE 838 VICTORVL 581 WRIGHTWOOD 852 SHOSHONE 843 VICTORVL 563 WRWD PHLN 389 SUMMIT VLY 881 VICTORVL 868 WRWD PHLN 302 TRONA 885 VICTORVL 228 YUCCA VLY 372 TRONA 887 VICTORVL 365 YUCCA VLY 361 TWNTYNPLMS 900 VICTORVL 369 YUCCA VLY 362 TWNTYNPLMS 912 VICTORVL 418 YUCCA VLY 367 TWNTYNPLMS 927 VICTORVL 623 YUCCA VLY 368 TWNTYNPLMS 951 VICTORVL 820 YUCCA VLY 401 TWNTYNPLMS 952 VICTORVL 493 TWNTYNPLMS 953 VICTORVL 819 TWNTYNPLMS 954 VICTORVL 830 TWNTYNPLMS 955 VICTORVL 865 TWNTYNPLMS 962 VICTORVL 910 TWNTYNPLMS 963 VICTORVL 217 VICTORVL 964 VICTORVL 220 VICTORVL 985 VICTORVL 221 VICTORVL 987 VICTORVL 226 VICTORVL 246 VTVL ADLN 241 VICTORVL 523 VTVL ADLN 243 VICTORVL 530 VTVL ADLN 245 VICTORVL 561 VTVL ADLN 261 VICTORVL 240 VTVL APVY 265 VICTORVL 242 VTVL APVY 269 VICTORVL 247 VTVL APVY 381 VICTORVL 646 VTVL APVY 403 VICTORVL 810 VTVL APVY 475 VICTORVL 813 VTVL APVY 486 VICTORVL 946 VTVL APVY 490 VICTORVL 961 VTVL APVY 506 VICTORVL 244 VTVL HSPR 508 VICTORVL 488 VTVL HSPR NANPA CO Code Administration Data as of 05/01/08 3 of 3