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Area Codes 310 & 424
Telephone Central Office Building Pictures

The following are respresntative examples of telephone central office buildings in Area Codes 310 & 424 (California).

Click on the pictures below for a larger version.


Avalon

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
AVLNCA11RS0

Switch Type:
Alcatel/Lucent 5ESS Remote

Prefixes Served:
(310) 510

Notes:
Source: TCO

 

Beverly Hills

Photo 2

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
BVHLCA01DS0
BVHLCA01DS1

Switch Type:
DS0: Genband/Nortel DMS-100
DS1: Genband/Nortel DMS-100

Prefixes Served:
DS0: (310) 246-8, 275, 385, 550, 724, 777, 786, 858, 860 (323) 272

DS1: (310) 205, 271, 273-4, 276, 278, 281, 285, 288, 859, 887-8

Notes:
Also serves parts of Los Angeles Zone 13. Source: TCO

 

Beverly Hills

"West Los Angeles-Century City"

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
WLANCA01DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 201, 203, 226, 229, 277, 282, 284, 286, 407, 551-3, 556-7, 712, 772, 785, 788-9

(323) 879

(424) 288
 

Notes:
Source: TCO

 

Compton-Gardena

"Compton"

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
CMTNCA01DS0
CMTNCA01DS1

Switch Type:
DS0: Genband/Nortel DMS-100
DS1: Genband/Nortel DMS-100

Prefixes Served:
DS0: (310) 223, 603-4, 608-9, 637, 661, 668-9, 687, 762-4, 884-6, 898
(323) 774, 979

DS1: (310) 537, 605, 631-2, 635, 638-9, 761, 900
(323) 636

Notes:
Also serves parts of Los Angeles Zone 06. Source: TCO

 

Compton-Gardena

"Gardena"

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
GRDNCA01DS0
GRDNCA01DS1

Switch Type:
DS0: Alcatel/Lucent 5ESS
DS1: Alcatel/Lucent 5ESS

Prefixes Served:
DS0: (310) 225, 243, 323, 352-4, 366, 380, 523, 630, 660, 719, 767-9, 808, 817, 851
(323) 321

DS1: (310) 217, 324, 327, 329, 512, 515-6, 527, 532, 538, 715, 965
(323) 770

Notes:
Also serves parts of Log Angeles Zone 09. Source: TCO

 

Culver City

Photo 2

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
CLCYCA11DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 202, 204, 244, 253, 280, 287, 558-9, 815, 836-42, 845
(323) 870

Notes:
Source: TCO

 

El Segundo

"Douglas"

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
ELSGCA12DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 252, 297, 322, 333-6, 363-4, 414, 416, 426, 524, 535-6, 563, 606-7, 615-6, 640, 643, 647-8, 653, 662, 725-7, 812-4, 964

Notes:
Also serves parts of Hawthorne. Source: TCO

 

Hawthorne

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
HWTHCA01DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 219, 263, 331-2, 349, 355, 644, 675-6, 679, 970, 973, 978
(323) 772

Notes:
Also serves parts of Los Angeles Zone 09. Source: TCO

 

Inglewood

"La Brea"

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
IGWDCA01DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 330, 412, 419, 671-4, 677, 680, 695
(323) 678

Notes:
Source: TCO

 

Inglewood

"Los Angeles-Airport"

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
LSANCA07DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 215-6, 258, 337-8, 342, 348, 410, 417, 568, 641-2, 645-6, 649, 665, 670

(323) 776

Notes:
Also serves parts of Los Angeles Zone 09. Source: TCO

 

Lomita

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
LOMTCA11DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 257, 325-6, 517, 530, 534, 539, 784, 891

Notes:
Source: TCO

 

Malibu

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
MALBCAXG45A

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 317, 456, 506

Notes:
Source: TCO

 

Malibu

"Zuma"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
MALBCAXF45K

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 457, 589

Notes:
Source: TCO

 

Redondo

"Hermosa Beach-Redondo"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
HRBHCAXA37K

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 318, 372, 374, 376, 379, 406, 798, 937

Notes:
Source: TCO

 

Redondo

"Manhattan Beach"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
MNBHCAXF54K

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 545-6, 796, 802, 939

Notes:
Source: TCO

 

Redondo

"Redondo Beach-El Nido"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
RDBHCAXF37K

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 214, 370-1, 542, 793, 921

Notes:
Source: TCO

 

Redondo

"Rolling Hills"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
RLHLCAXF79L

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 265, 377, 541, 544

Notes:
Source: TCO

 

Redondo

"Torrance-Del Amo"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
TRNCCAXF54K

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 316, 540, 543, 792, 944

Notes:
Source: TCO

 

Redondo

"Torrance-Palos Verdes"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:TRNCCAXG37J

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 373, 375, 378, 465, 791

Notes:
Source: TCO

 

 

San Pedro

"5th Street"

Photo 2

 

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
SNPDCA01DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 221, 241, 514, 519, 521, 547-8, 732, 831-3

Notes:
Source: TCO

 

San Pedro

"Wilmington"

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
WLMGCA01DS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 233, 513, 518, 522, 549, 816, 830, 834-5, 847, 952
(323) 775

Notes:
Also serves parts of Los Angeles Zone 06. Source: TCO

 

Santa Monica

"Main"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
SNMNCAXGDS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 260, 319, 393-5, 434, 451, 458, 570, 576, 587, 656, 899, 917

Notes:
Source: TCO

 

Santa Monica

"Pacific Palisades"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
PCPLCAXF45K

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 230, 454, 459, 573

Notes:
Source: TCO

 

Santa Monica

"Sunset"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
SNMNCAXJ31K

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 267, 314, 392, 396, 399, 450, 452, 581, 664, 866

Notes:
Source: TCO

 

Santa Monica

"Topanga"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
TPNGCAXFRS1

Switch Type:
Automatic Electric GTD-5 Remote

Prefixes Served:
(310) 455

Notes:
Source: TCO

 

Santa Monica-Mar Vista

"Culver City-Mar Vista"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
CLCYCAXG39K

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 313, 390-1, 397-8, 439, 572, 636, 737, 915

Notes:
Source: TCO

 

Santa Monica-Mar Vista

"Playa Del Rey"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
PDRYCAXF82A

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 301, 302, 305-6, 448, 574, 577-8, 821-3, 827

Notes:
Source: TCO

 

Torrance

Photo 2

Listing Updated:
October 2011

Operating Company:
at&t/SBC/Pacific Telesis/Pacific Bell

CLLI:
TRNCCA11DS0

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 212, 222, 224, 320, 328, 381, 468, 533, 618, 781-3, 787, 972

Notes:
Source: TCO

 

West Los Angeles

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
WLANCAXFDS1

Switch Type:
Alcatel/Lucent 5ESS

Prefixes Served:
(310) 231, 235, 268, 312, 444-5, 473, 477-9, 575, 914, 966, 996

Notes:
Source: TCO

 

West Los Angeles

"Bel Air"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
BELRCAXF47K

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 440, 471-2, 476, 889

Notes:
Source: TCO

 

West Los Angeles

"Bundy West"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
WLANCAXHDS1
WLANCAXH82J

Switch Type:
DS1: Alcatel/Lucent 5ESS
82J: Automatic Electric GTD-5

Prefixes Served:
DS1: (310) 207, 442, 571, 584, 820, 826, 979

82J: (310) 264, 315, 447, 449, 453, 582, 586, 828-9, 998

Notes:
Also serves parts of Santa Monica. Source: TCO

 

West Los Angeles

"University"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
WLANCAXJDS0

Switch Type:
Genband/Nortel DMS-100

Prefixes Served:
(310) 206, 208-9, 443, 794, 824-5

Notes:
Source: TCO

 

West Los Angeles

"Westwood"

Listing Updated:
October 2011

Operating Company:
Frontier/Verizon/GTE

CLLI:
WLANCAXG47G

Switch Type:
Automatic Electric GTD-5

Prefixes Served:
(310) 234, 441, 446, 470, 474-5

Notes:
Source: TCO

 

 


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Page last modified May 30, 2016
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