Any time AARO members, most of whom are licensed HAMS, participate as an organized group representing the club in amateur radio operations, such as "Field Day", the club callsign AA5RO is used. This replaces the original club callsign, KC5NTN.

The process of confirming radio contacts with any HAM or group of HAMs involves exchanging "QSL cards." These are post cards which give time, date, frequency, location, and other bits of information about the contact. If you, or someone you know has "worked" (made a radio contact) with an AARO club station using the callsign "AA5RO" send your QSL card to:

The Alamo Area Radio Organization

PO Box 380032

San Antonio, Texas 78268