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Area Code 925
Telephone Central Office
Building Pictures
The following are representative examples of telephone central office buildings in Area Code 925 (California).
Click on the pictures below for a larger version.
Antioch
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
ANTCCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 522, 706, 753-7, 776-9, 978Notes:
Source: GSV
Clayton
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
CYTNCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 524, 672-3Notes:
Source: GSV
Concord
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
CNCRCA01DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 246, 363, 521, 602, 609, 677, 688-9, 691-2, 798, 808, 825, 969Notes:
Source: GSV
Danville
"Main"
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
DAVLCA12DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 314, 362, 552, 743, 820, 831, 837-8, 855Notes:
Source: GSV
Danville
"Tassajara"
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
DAVLCA13DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(925) 248, 648, 735-6, 815, 964, 967-8Notes:
Also serves parts of Bishop Ranch and Dublin-San Ramon ratecenters. Source: GSV
East Contra Costa
"Bethel Island"
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
BTISCA11RS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(925) 684Notes:
Source: GSV
East Contra Costa
"Brentwood"
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
BRWDCA12DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 240, 513, 516, 634Notes:
Source: GSV
East Contra Costa
"Oakley"
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
OKLYCA11DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(925) 625, 679Notes:
Source: GSV
Lafayette
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
LFYTCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 283-4, 299, 962Notes:
Source: GSV
Livermore
Listing Updated:
June 2020Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
LVMRCA11DS0
LVMRCA11DS1Switch Type:
DS0: Ribbon/Genband/Nortel DMS-100
DS1: Nokia/Alcatel/Lucent 5ESSPrefixes Served:
DS0: (925) 243, 443, 447, 455-6, 961
DS1: (925) 245, 294, 371, 373, 422-4, 449, 454, 606, 960Notes:
Source: GSV
Martinez
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
MRTZCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 228-9, 313, 335, 370, 372, 957Notes:
Source: GSV
Moraga
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
MORGCA12DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(925) 247, 376-7, 631Notes:
Source: GSV
Orinda
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
ORNDCA11DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(925) 253-4, 258Notes:
Source: GSV
Pittsburg
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PSBGCA01DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 252, 427, 431-2, 439, 473Notes:
Source: GSV
Pittsburg West
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PSBGCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 261, 458, 709Notes:
Also known as Gladstone. Source: GSV
Pleasanton
"Main"
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PLTNCA12DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 249, 417, 426, 461-2, 484-5, 600, 846, 931Notes:
Source: GSV
Pleasanton
"Hacienda"
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PLTNCA13DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 224-5, 227, 251, 416, 460, 463, 467-9, 520, 523, 598, 730, 734, 737, 847, 924Notes:
Source: GSV
Sunol
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
SUNLCA11RS0Switch Type:
Ribbon/Genband/Nortel RSCPrefixes Served:
(925) 862Notes:
Source: GSV
Walnut Creek
Listing Updated:
February 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
WNCKCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(925) 210, 274, 279-80, 295-6, 472, 817, 906, 926-7, 933, 937-9, 941-2, 974-5, 979, 988Notes:
Source: GSV
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Copyright 2021 Telephone Central Office Building
Pictures |