Dorchester, Illinois

Nearest ZIP codes to Dorchester

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

Area codes for Dorchester

• Area code 618

  In service since 1947. Shares its area with 730. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 730

  In service since July 7, 2023. Shares its area with 618. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 217

  In service since 1947. Shares its area with 447. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 447

  In service since March 27, 2021. Shares its area with 217. 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

Dorchester is in the Central Time zone.

Towns near Dorchester

• Wilsonville3.3 km (2.1 mi)
• Mount Clare4.8 km (3.0 mi)
• Gillespie6.5 km (4.0 mi)
• Royal Lakes6.8 km (4.2 mi)
• Sawyerville7.2 km (4.5 mi)
• Benld7.4 km (4.6 mi)
• Bunker Hill8.2 km (5.1 mi)
• East Gillespie8.7 km (5.4 mi)