920-231 Prefix — Oshkosh, Wisconsin

Phone numbers starting with 920-231 are based in Oshkosh, Wisconsin, primarily served by Ameritech Wisconsin.

Recently looked-up numbers in 920-231

• 920-231-9797

More about this region

Area code 920 directory · About area code 920 · Get a WI phone number

Last updated: August 28, 2026