Gilson, Illinois
Gilson, Illinois, in Knox County, has ZIP code 61436 and area code 309, with 861 as an overlay.
- ZIP code
- 61436
- Area codes
- 309, 861
- County
- Knox County
- State
- Illinois
- Time zone
- Central Time
- Coordinates
- 40.8765, -90.1747
ZIP codes in Gilson
Area codes for Gilson
- 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
Gilson is in the Central Time zone.
Towns near Gilson
- Dahinda9.2 km (5.7 mi)
- Oak Run10 km (6.2 mi)
- Knoxville10.2 km (6.3 mi)
- Maquon10.4 km (6.5 mi)
- East Galesburg13.5 km (8.4 mi)
- Williamsfield13.7 km (8.5 mi)
- Yates City15.9 km (9.9 mi)
- Yates17.4 km (11 mi)
Local numbers in area code 309
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- (309) 381-8008Galesburg, IL$69View & buy
- (309) 480-1881Castleton, IL$69View & buy
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- (309) 560-5888Colfax, IL$69View & buy
- (309) 590-9888Bloomington, IL$69View & buy
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- (309) 610-3777Forest City, IL$69View & buy
- (309) 610-3888Forest City, IL$69View & buy
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