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This is a list of the area codes in the state of Illinois and its numbering plan areas in the North American Numbering Plan.. All NPAs within Illinois. 217/447: Central Illinois, including the region running west from the Illinois-Indiana border through Danville, Effingham, Champaign–Urbana, Decatur, Springfield, Quincy until Illinois' western border with Missouri and Iowa
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.
Illinois's FIPS state code is 17 and its postal abbreviation is IL. What is now Illinois was claimed as part of Illinois County, Virginia, between 1778 and 1782. Modern-day county formation dates to 1790 when the area was part of the Northwest Territory; two counties—St. Clair and Knox—were created at that time.
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 January 2025. "Cities in Illinois" redirects here. For unincorporated communities, see List of unincorporated communities in Illinois. For CDPs, see List of census-designated places in Illinois. Map of the United States with Illinois highlighted Illinois is a state located in the Midwestern United ...
ZIP Codes: 62521–62523, 62526. Area codes: 217, 447: ... The USGS Domestic GeoNames resource has two listings for Decatur: "City of Decatur", which is a Civil-class ...
ZIP Code(s) 61531. Area code: 309: FIPS code: 17-25531: GNIS ID: 2394746 [1] Wikimedia Commons: Farmington, Illinois: ... IL 116 enters from the north as North Main ...
ZIP codes: 60440, 60515, 60516, 60517, 60532, 60540, 60563, 60565 ... (This list is based on USGS data and may include former settlements.) ... Illinois Benedictine ...
ZIP codes: 62428, 62432, 62436, 62445, 62448, 62467, 62479. FIPS code: 17-079-31888: Grove Township is one of eleven townships in Jasper County, Illinois, USA. As of ...