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Modern two-letter abbreviated codes for the states and territories originated in October 1963, with the issuance of Publication 59: Abbreviations for Use with ZIP Code, three months after the Post Office introduced ZIP codes in July 1963.
503: The northwestern corner of Oregon, including Portland and its metropolitan area, Salem and other cities 541: All of Oregon outside the northwestern corner, including Eugene. 971: An overlay of area code 503. Until 2008, 971 was a concentrated overlay, meaning it was only present in some parts of the 503 area.
In the initial configuration of the nationwide telephone numbering plan designed by AT&T in 1947, [1] the state of Oregon was assigned a single area code, 503. Despite Oregon's growth in the second half of the twentieth century, particularly in the Willamette Valley (Portland and Eugene), this remained so for 48 years, making Oregon one of the largest states by area with a single area code.
With the depletion of new numbers in area codes 312 and 773, an overlay of both of them, area code 872, was created in November 2009, beginning ten-digit dialing within the city limits of Chicago. The remaining area without an overlay in the northern part of Illinois, 708, eventually received such with area code 464 taking effect on January 21 ...
The land Oregon, Illinois was founded on was previously held by the Potawatomi and Winnebago Indian tribes. In fact, later, settlers discovered that the area contained a large number of Indian mounds, most 10–12 feet (3.0–3.7 m) in diameter.
Map of the United States with Oregon highlighted. Oregon is a state located in the Western United States. All population data is based on the 2020 census and 2010 census and the Census Bureau's annual estimates. [1] All area data is based on the 2010 US Gazetteer files. There are 241 municipalities.
ISO 3166-2:US is the entry for the United States in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Portland (/ ˈ p ɔːr t l ə n d / PORT-lənd) is the most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette and Columbia rivers, it is the county seat of Multnomah County, Oregon's most populous county.