AT&T Internet Services in Mckinney, TX
These numbers are located in the city of Mckinney part of Collin county. There are a few other subcodes that cover this area as well so take care not to confuse them.
Collin county is situated in Texas and operates CT (UTC -06:00) time. This number group covers the 75069, 75071, 75070, & 75071 zip codes.