Area Code 510
Telephone Central Office Building Pictures

The following are representative examples of telephone central office buildings in Area Code 510 (California).

Click on the pictures below for a larger version.

Hayward "Main"	Listing Updated: May 2020 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: HYWRCA01DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (510) 247, 537-8, 581-3, 690, 727-8, 733, 881, 884-6, 888-9 Notes: Source: GSV
Hayward "Depot"	Listing Updated: May 2020 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: HYWRCA11DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (510) 259, 264-6, 293, 670, 723, 732, 780-6, 887 Notes: Source: GSV
Hayward "San Leandro"	Listing Updated: May 2020 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: SNLNCA11DS0 Switch Type: Ribbon/Genband/Nortel DMS-100 Prefixes Served: (510) 258, 276, 278, 297, 317, 346-7, 351-2, 357, 481, 483, 614, 618, 667, 678, 895 Notes: Also serves of Oakland-Trinidad. Source: GSV
Oakland-Berkeley "Berkeley"	Listing Updated: May 2020 Operating Company: at&t/SBC/Pacific Telesis/Pacific Telephone CLLI: BKLYCA01DS0 BKLYCA01DS1 Switch Type: DS0: Ribbon/Genband/Nortel DMS-100 DS1: Ribbon/Genband/Nortel DMS-100 Prefixes Served: DS0: (510) 495, 642-3, 647, 649, 664-6, 704-5, 845, 848, 981 DS1: (510) 204, 229, 486, 540, 548-9, 644, 841, 843, 849, 883 Notes: Source: GSV