Area Code 415
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Code 415 (San Francisco, California metro).

Click on the pictures below for a larger version.

Corte Madera "Larkspur"	Listing Updated: July 2022 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: LRKSCA11DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 461, 464, 924-5, 927, 945 Notes: Also serves pars of San Rafael. Source: GSV
Ignacio	Listing Updated: June 2022 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: IGNCCA12DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 382, 506, 883-4 Notes: Source: GSV
Mill Valley	Listing Updated: February 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: MLVYCA01DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 380-1, 383-4, 388-9 Notes: Source: GSV
Novato	Listing Updated: April 2021 Operating Company: Frontier/Verizon/GTE CLLI: NOVTCAXFDS0 Switch Type: Nokia/Alcatel/Lucent/Automatic Electric GTD5-EAX Prefixes Served: (415) 209, 892-3, 897-9 Notes: Source: GSV
San Francisco: Central "3rd Street"	Listing Updated: April 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA17DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 330, 467-8, 508, 656-7, 671, 715, 822 Notes: Also serves parts of San Francisco: Juniper ratecenter. Source: GSV
San Francisco: Central "25th Street"	Listing Updated: July 2022 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA05DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 206, 282, 285, 401, 550, 641-3, 647-8, 695, 821, 824, 826, 920, 970 Notes: Source: GSV
San Francisco: Central "Bush/Pine Street"	Listing Updated: January 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA01DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 248-9, 262-3, 273-4, 291, 296, 315, 318, 362, 364, 374, 393, 395, 622-3, 627, 636, 646, 658, 670, 675-6, 678, 693, 705, 773, 834-5, 837, 839, 953-4 Notes: Source: GSV
San Francisco: Central "Folsom Street" Photo 2	Listing Updated: August 2022 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA21DS0 SNFCCA21DS1 Switch Type: DS0: Ribbon/Genband/Nortel DMS-100 DS1: Ribbon/Genband/Nortel DMS-100 Prefixes Served: DS0: (415) 222, 227, 247, 278, 344, 348, 356-7, 396, 427, 495, 498, 538, 541, 543, 597, 618, 736, 744, 808, 817, 896, 904-5, 908, 932, 947, 972-5, 977-9, 995 DS1: (415) 243, 281, 284, 369, 371, 442, 512, 536-7, 542, 545-7, 615, 624, 644, 764, 768, 777-8, 836, 856, 882, 894, 957, 998 Notes: Also known as San Francisco 21. Very large "office building" like central office. Home to a several CLEC switches and a large regional tandem switch as well as an AT&T Long Lines 4ESS tandem (089-T). Current photo: GSV. Photo 2: July 2011
San Francisco: Central "McCoppin Street"	Listing Updated: January 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA04DS0 SNFCCA04DS1 Switch Type: DS0: Ribbon/Genband/Nortel DMS-100 DS1: Ribbon/Genband/Nortel DMS-100 Prefixes Served: DS0: (415) 241, 355, 431, 436-7, 487, 522, 551, 554, 556-7, 565, 581, 701, 703, 934 DS1: (415) 252, 255, 503, 552-3, 558, 575, 621, 626, 734, 832, 861, 863-5 Notes: Source: GSV
San Francisco: Central "Steiner Street" Photo 2	Listing Updated: June 2022 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA12DS0 SNFCCA12DS1 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: DS0: (415) 292, 345-6, 353, 359, 409, 440-1, 447, 561, 563, 567, 673-4, 931 DS1: (415) 202, 351, 474, 600, 614, 749, 771, 775-6, 833, 885, 921-3, 928-9 Notes: Current photo: GSV. Photo 2: August 2016 (Bob H.)
San Francisco: Juniper "Onondaga Avenue"	Listing Updated: February 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA06DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 239, 333-4, 337-8, 404-6, 452, 469, 582, 584-7, 841 Notes: Source: GSV
San Francisco: Montrose-Evergreen "9th Avenue" Photo 2	Listing Updated: January 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA13DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 221, 379, 386-7, 422, 666, 668, 750-2, 831, 876, 933 Notes: Current photo: GSV. Photo 2: August 2016 (Bob H.)
San Francisco: Montrose-Evergreen "19th Avenue"	Listing Updated: January 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNFCCA14DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 242, 504, 566, 661, 664-5, 681-2, 731, 753, 759 Notes: Source: GSV
San Rafael "Main"	Listing Updated: July 2022 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNRFCA01DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 256-9, 451, 453-60, 482, 485, 721 Notes: Source: GSV
San Rafael "Parkway"	Listing Updated: July 2022 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNRFCA11DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 444, 446, 472-3, 479, 491-2, 499, 507 Notes: Source: GSV
Sausalito	Listing Updated: January 2023 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SSLTCA11DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (415) 289, 331-2, 339 Notes: Source: GSV

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