Illinois, Illinois

No ZIP code carries the name of Illinois, Illinois, in Rock Island County; the nearest ZIP codes are 61237 and 61259, in area code 309, with 861 as an overlay.

Nearest ZIP: 61237, 61259
Area codes: 309, 861
County: Rock Island County
State: Illinois
Time zone: Central Time
Coordinates: 41.3991, -90.8997

Nearest ZIP codes to Illinois

These are the ZIP codes nearest to Illinois, each listed with the post office it is named after.

ZIP code	Post office	County	Area codes
61237	Buffalo Prairie	Rock Island County	309, 861
61259	Illinois City	Rock Island County	309, 861

Area codes for Illinois

Area code 309
In service since 1957. Shares its area with 861. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.
Area code 861
In service since February 24, 2023. Shares its area with 309. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Illinois is in the Central Time zone.

Towns near Illinois

Illinois City1.3 km (0.8 mi)
Buffalo Prairie8 km (5.0 mi)
Edgington11.4 km (7.1 mi)
Eliza13.1 km (8.1 mi)
Taylor Ridge13.9 km (8.6 mi)
Andalusia15.8 km (9.8 mi)
Hamlet17 km (11 mi)
Millersburg18.9 km (12 mi)

Local numbers in area code 309

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