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).

Click on the pictures below for a larger version.

San Francisco: Central "Folsom"	Listing Updated: July 2011 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).
San Francisco: Central "McCoppin"	Listing Updated: May 2020 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"	Listing Updated: August 2016 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: Source: Bob H.
San Francisco: Central "25th Street"	Listing Updated: May 2020 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: Juniper "Onondaga"	Listing Updated: May 2020 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"	Listing Updated: August 2016 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: Source: Bob H.