Telephone Central Offices

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  CALIFORNIA STATE TELEPHONE CENTRAL OFFICE'S

 

                 

AREA CODE 626

Area code 213,

 

 






ALHAMBRA


 Alhambra is a rather large urban office that also serves as a local and access tandem switch for offices in the eastern areas of the Los Angeles LATA, specifically the San Gabriel Valley.

Old Exchanges: ATlantic 1, 2, 4 and 9

Also assigned to this office (Alhambra Main) was the prefix 283, commonly known as CUmberland. This was a Los Angeles Rate Area foreign exchange for Alhambra. What this means is that there were so many requests from businesses (and some residences) for a Los Angeles Foreign Exchange number, the company simply served those requests directly from this office with the 283 prefix and billed it as though it was actually part of one of the District Areas in the Los Angeles Exchange. It saved a lot of inter office facilities and work in provisioning for those requests.



ARCADIA

 Original Southern California Telephone office, became Pacific Telephone & Telegraph, Pacific Bell, SBC and now AT&T.

Old Exchanges: ATwater 6, DOuglas 6 and 7, HIllcrest 6 and 7.



AZUSA

 Original Associated Telephone Office that became dial in the 1950s. Became General Telephone, GTE and now Verizon California.

Old Exchanges: EDgewood 4 & FLeetwood 4



BALDWIN PARK


 Original Associated Telephone Office that became dial in the 1950s. Became General Telephone, GTE and now Verizon California.

Old Exchanges: EDgewood 7 & 8, FLeetwood 7 & YOrktown 2



COVINA


 Was built during the 1930s by Associated Telephone. Became dial in the early 1950s. Serves as the main tandem office for Verizon offices in the eastern Los Angeles-San Gabriel Valley region (23 offices). This office also finally replaced remote manual toll stations still serving the San Gabriel Canyon during the early 1990s.

Old Exchanges: EDgewood 1, 2 and 9 and FLeetwood 2



EL MONTE

Serves the dense portion of the San Gabriel Valley and City of El Monte. Became a dial office pre-1942 and during the Direct Distance Dialing hierarchy was classified as a "Primary" office with direct trunk groups to the Los Angeles Sectional Office. In the early 1970s hosted foreign exchange service to Los Angeles to relieve Alhambra. After divestiture in 1984, tandem functions were transferred to the Alhambra office.

Old Exchanges: GIlbert 3, 4 & 8, FOrest 0 & 8, BUdlong 8



GLENDORA

Built by General Telephone in the 1960s to relieve the Covina and Azusa offices. Became GTE, Verizon California and now Frontier Communications.

 

Old Exchanges: EDgewood 5 and YOrktown 3



LA PUENTE XF "ROWLAND"


 Office was as built by General Telephone in the early 1960s to relieve the La Puente Main office.

Old Exchanges: YOrktown 4



LA PUENTE XG "MAIN"


 Office built by Associated Telephone in the 1940s and became dial in the early 1950s. Became General Telephone, GTE then Verizon California and now Frontier Communications.

Old Exchanges: EDgewood 0, 3 and 6, FLeetwood 6




LA PUENTE XL "MAPLEGROVE"


 The Maplegrove office was built by GTE in the early 1980s to relieve the La Puente Main office and Baldwin Park office and provide service to the growing Valinda and West Covina areas.



MONROVIA


 Original California Water & Telephone office built in the 1940s and became dial in 1950. Became General Telephone, GTE then Verizon and now Frontier Communications.

Old Exchanges: ELiott 7, 8 and 9



PASADENA 11 "GREEN"


 Constructed in the 1920s by Southern California Telephone Company. Purchased by Pacific Telephone & Telegraph, became Pacific Bell, SBC and now AT&T.

Old Exchanges: SYcamore 2, 3, 5 and 6, GIbson 9, HIlltop 0, MUrray 1 and RYan 1



PASADENA 12 "LAKE"


 Office built to replace the original Mt. Wilson office in Sierra Madre.

Old Exchanges: SYcamore 4, 7 and 8, MUrray 4



PASADENA XF "HASTINGS"

Remote office built by Associated Telephone in the late 1950s to relieve the Sierra Madre office and provide service to the Hastings Ranch development. Was once the original Centrex for Allstate Insurance Company.

Office is a remote switch hosted from the Sierra Madre office.



ROSEMEAD

Office built in the early 1950s by Pacific Telegraph & Telephone to relieve the Alhambra and San Gabriel office.

Old Exchanges: ATlantic 0 & 8



SAN GABRIEL


 Original Southern California Telephone office which became dial pre-1944.

Old Exchanges: ATlantic 6 & 7



SIERRA MADRE


 Originally constructed by California Water & Telephone Company in the 1930s and had dial service prior to 1942. Host office for Pasadena Hastings.

Old Exchanges: CUster 5, ELgin 5 & 6



SOUTH PASADENA


 Constructed in the 1930s to relieve the Pasadena 11 office and serve the expanding South Pasadena area.

Old Exchanges: MUrray 2 and PYramid 1

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