FCC Cellular Markets
The FCC assigns cellular licenses based on geographic markets.
What CMA is your county in? Download the FCC County to CMA Spreadsheet.

Cellular Market Areas (CMA) for Cellular (850 MHz) Markets

Larger CMA Map Image

Basic Trading Areas (BTA) for PCS (1900 MHz) Markets:

Regional Economic Area Groups (REAG) for the new AWS (1700 MHz) and 700 MHz Markets:

source: fcc