U.S. Cellular in Elkhorn, WI
These numbers are located in the city of Elkhorn part of Walworth county. There are a few other subcodes that cover this area as well so take care not to confuse them.
Walworth county is situated in Wisconsin and operates CT (UTC -06:00) time. This number group covers the 53121, 53147, 53191, & 53138 zip codes.