Area Code 503

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OREGON STATE TELEPHONE CENTRAL OFFICE'S

AREA CODE 503/971

Original area code for the entire state of Oregon as part of the North American Numbering Plan in October 1947. The code remained the sole area code for the entire state of Nevada until 1995 when due to tremendous telecommunication device growth in the state the code was split. The 503 code remained for the Portland metropolitan area as well as the northwestern portion of the state, whereas the rest of the state took the 541 code. An additional overlay of 971 was added in 1999 to relieve the original 503 code. Historically, this portion of the state has been served by Pacific Telephone & Telegraph, later Pacific Northwest Bell. There are pockets of independents such as GTE which became Verizon Northwest and now Frontier.

ASTORIA	Office original built by Pacific Telephone & Telegraph and became a Pacific Northwest Bell office in 1961. Office was once a Primary Center (Class 3) in the Direct Distance Dialing hierarchy with direct trunk groups to the Portland Sectional office. Office is now a local access tandem to the offices in the northwestern region of Oregon. Astoria is home to the Goonies.
BAY CITY (Thanks to AJ)	Original United Telephone Northwest, now Century Link office. Northern Telecom Remote Switch Center hosted by Sheridan office.
BEAVER (Thanks to AJ)	Original United Telephone Northwest, now Century Link office. Northern Telecom Remote Switch Center hosted by Sheridan office.
CANBY (Thanks to CJ)	Independent telephone provider Canby Telephone Association can trace its roots back to 1906. Office is now served by a digital switch with approximately 7,000 subscribers. This office also serves as a tandem switch with connections to Portland, Oregon and a host switch for the Needy remote switch.
CANON BEACH (Thanks to AJ)	Original Pacific Northwest Bell office, then US West, Qwest and now Century Link. Nicely designed digital office designed to blend into the neighborhood of this upscale, popular beach resort town.
CLOVERDALE (Thanks to CJ)	Original United Telephone Northwest, now Century Link remote switch hosted by Sheridan office.
GARIBALDI (Thanks to AJ)	Original United Telephone Northwest, now Century Link office. Northern Telecom Remote Switch Center hosted by Sheridan office.
GRAND RONDE (Thanks to CJ)	Original United Telephone Northwest, now Century Link remote switch hosted by Sheridan office.
McMINNVILLE (Thanks to AJ)	Original GTE Northwest, become Verizon Northwest now Frontier office.
NEWBURG (Thanks to AJ)	Original GTE Northwest, become Verizon Northwest now Frontier office.
PORTLAND 11 "ALPINE"	Original Pacific Telephone & Telegraph office. Became Pacific Northwest Bell then US West, Qwest and now Century Link.
PORTLAND 12 "ATLANTIC"	Original Pacific Telephone & Telegraph office. Became Pacific Northwest Bell then US West, Qwest and now Century Link.
PORTLAND 13 "BELMONT"	Original Pacific Northwest Bell office, then US West, Qwest and now Century Link. The Belmont office is now the main access and local tandem for the Portland region having taking over the functions from the "Capitol" office in the 1990s.
PORTLAND 17 "CHERRY" (Thanks to AJ)	Original Pacific Telephone & Telegraph office. Became Pacific Northwest Bell then US West, Qwest and now Century Link. Digital switch serving southwest Portland.
Local Switch and retired tandem (grey building) PORTLAND 69 "CAPITOL"	Portland "Capital" was the original telephone office in the Portland area operated by Pacific Telephone & Telegraph. A newer concrete building was constructed next to the existing office in the 1960s to host the Pacific Northwest Bell access tandem and connect to the AT&T Toll Office across the street. Tandem functions for Portland have been relocated to the Portland "Belmont" office in the 1990s and the Capitol office became a end office only.
ROCKAWAY (Thanks to AJ)	Original United Telephone Northwest, now Century Link office serving the Rockaway Beach area. Northern Telecom Remote Switch Center hosted by Sheridan office.
SALEM-MAIN (Thanks to CJ)	Original Pacific Telephone & Telegraph office. Became Pacific Northwest Bell then US West, Qwest and now Century Link. This office was once a Class 4 Toll Center with the Direct Distance Dialing switching hierarchy and had direct trunk groups to the Portland Section Center.
SEASIDE	Original Pacific Telephone & Telegraph office. Became Pacific Northwest Bell then US West, Qwest and now Century Link.
SHERIDAN (Thanks to AJ)	Original United Telephone Northwest, now Century Link office operating a DMS 100/200 digital host to numerous remote switches throughout the northwest coastal Oregon region. The Sheridan office also serves as a Tandem switch for the region.
TILLIMOOK	Original Pacific Telephone & Telegraph office. Became Pacific Northwest Bell then United Telephone Northeast, Embarq and now Century Link. Tillamook is a remote switch hosted from the Sheridan office.
TURNER (Thanks to CJ)	Frontier Communications. Digital switch.
WARRENTON (Thanks to AJ)	Original Pacific Northwest Bell office, then US West, Qwest and now Century Link office. Serves Warrenton and Hammond at the extreme northwest of Oregon, at the Columbia River mouth.
WILLAMINA (Thanks to AJ)	Original United Telephone Northwest, now Century Link office. Northern Telecom Remote Switch Center hosted by Sheridan office.
WILSONVILLE	Original GTE Northwest, become Verizon Northwest now Frontier office.
WOODBURN (Thanks to CJ)	Original Pacific Telephone & Telegraph office. Became Pacific Northwest Bell then United Telephone Northeast, Embarq and now Century Link. Nice design in a residential area built in the 1960s.

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