This is a list of radio and television broadcasting stations in the United States that are currently assigned three-letter call signs.
In the United States, all radio and television broadcasting stations that are licensed by the Federal Communications Commission (FCC) are assigned official, distinct call signs.
The last new three-letter call was assigned to station WIS (now WVOC) in Columbia, South Carolina on January 23, 1930.
Not included are unlicensed operations, such as carrier current, cable TV, and Internet stations — for example, San Diego State University's "KCR" — which have adopted call-letter-like identifiers that are not officially issued by the FCC.
As of January 2025, there are a total of 101 AM, FM and TV stations in the United States that are assigned three-letter call signs.