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Area Code 650
Telephone Central Office
Building Pictures
The following are representative examples of telephone central office buildings in Area Code 650 (California).
Click on the pictures below for a larger version.
Half Moon Bay
Listing Updated:
November 2021Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
HMBACA12DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 560, 712, 726Notes:
Source: GSV
La Honda
Listing Updated:
May 2023Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
LAHNCA11RS0Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(650) 747Notes:
Source: GSV
Los Altos
Listing Updated:
February 2024Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
LSATCA11DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 559, 917, 941, 947-9Notes:
Source: GSV
Millbrae
Listing Updated:
February 2023Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
MLBRCA11DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 259, 552, 652, 692, 697, 777Notes:
Source: GSV
Moss Beach
Listing Updated:
May 2019Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
MSBHCA11RS2Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(650) 563, 728Notes:
Source: GSV
Mountain View
Listing Updated:
September 2023Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
MTVWCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(650) 237, 254, 314, 318, 335-6, 390, 428, 526-8, 567, 903, 919, 923-3, 937-8, 943-4, 988Notes:
Source: GSV
Pacifica
Listing Updated:
February 2023Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PCFCCA11DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 355, 359, 557, 738, 993Notes:
Source: GSV
Palo Alto
"Main"
Listing Updated:
March 2022Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PLALCA02DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 289, 321-30, 462-3, 470, 473, 566, 614, 617, 688, 752, 833, 838, 853Notes:
Source: GSV
Palo Alto
"Menlo Park"
Listing Updated:
April 2019Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
MNPKCA11DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 233-4, 529, 561, 851, 854, 926Notes:
Also serves Woodside ratecenter. Source: GSV
Palo Alto
"South"
Listing Updated:
January 2020Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PLALCA12DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 213, 236, 251, 308, 320, 354, 424, 461, 485, 493-4, 496, 565, 621, 739, 812, 842-3, 845-6, 849, 852, 855-9Notes:
Source: GSV
Pescadero
Listing Updated:
May 2019Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
PSCDCA11RS1Switch Type:
Nokia/Alcatel/Lucent 5ESS RemotePrefixes Served:
(650) 879Notes:
Source: GSV
Redwood City
Listing Updated:
September 2023Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
RDCYCA01DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 216, 261, 298-9, 306, 361, 363-9, 381, 474, 482, 542, 556, 562, 568-9, 599, 701, 780, 786, 817, 839, 995Notes:
Source: GSV
San Carlos-Belmont
"San Carlos"
Listing Updated:
August 2022Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
SNCRCA11DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 413, 486, 506, 508, 551, 591-6, 598, 607, 610, 620, 622, 631-3, 637, 654, 802Notes:
Source: GSV
San Francisco: Juniper DA
"Colma Washington"
Listing Updated:
April 2022Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
COLACA01DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(650) 301, 466, 550, 746, 754-8, 878, 985, 991-2, 994, 997Notes:
Also serves parts of South San Francisco. Source: GSV
San Mateo
"Main"
Listing Updated:
August 2022Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
SNMTCA11DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(650) 212, 286-7, 293-5, 312, 350, 432, 513, 525, 554, 638, 655Notes:
Source: GSV
San Mateo
"Burlingame"
Listing Updated:
February 2023Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
BRLNCA01DS0Switch Type:
Ribbon/Genband/Nortel DMS-100Prefixes Served:
(650) 340, 342-4, 347-8, 373, 375, 401, 548, 558, 579, 612, 685, 696, 762Notes:
Source: GSV
South San Francisco
"San Bruno"
Listing Updated:
June 2022Operating Company:
at&t/SBC/Pacific Telesis/Pacific TelephoneCLLI:
SNBUCA02DS0Switch Type:
Nokia/Alcatel/Lucent 5ESSPrefixes Served:
(650) 225, 467, 553, 615-6, 624, 634-5, 737, 741-2, 761, 794, 808, 829, 837, 866, 869, 874-7Notes:
Also serves parts of San Francisco: Juniper DA. Source: GSV
Visit other California Area Codes: 209 213 310 323 408 415 510 530 559 562 619 626 650 661 707 714 760 805 818 831 858 909 916 925 949 951
Visit nearby regions: Arizona Nevada Oregon
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Copyright 2024 Telephone Central Office Building
Pictures |