CTAF/UNICOM: 123.0

WX AWOS-3: 118.725 (830-755-9099)

SAN ANTONIO APPROACH: 125.1

SAN ANTONIO DEPARTURE: 125.1

WX ASOS at SAT (16 nm SE): PHONE 210-805-5583 

Source: www.airnav.com/airport/5C1