Lake Koshkonong, Wisconsin

Nearest ZIP codes to Lake Koshkonong

This is the ZIP code nearest to Lake Koshkonong, each listed with the post office it is named after.

Area codes for Lake Koshkonong

• Area code 920

  In service since July 26, 1997. Shares its area with 274. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 274

  In service since May 5, 2023. Shares its area with 920. 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

Lake Koshkonong is in the Central Time zone.

Towns near Lake Koshkonong

• Milton9.1 km (5.7 mi)
• Fort Atkinson10.3 km (6.4 mi)
• Edgerton10.4 km (6.5 mi)
• Rockdale14.2 km (8.8 mi)
• Cambridge16 km (9.9 mi)
• Fulton16.3 km (10 mi)
• Whitewater16.5 km (10 mi)
• Lake Ripley17 km (11 mi)