Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA7OS callsign genealogy
Currently held by Brennan, Peter J
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by AA7OS's current licensee, walking backwards.
- Brennan, Peter JWAgranted 2024-01-09cancelled 2024-02-03
Successor callsigns
Callsigns held now by people who previously held AA7OS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA7OS, oldest first.
- ZITTING, JOHN S UT2002-04-30 → cancelled 2014-05-01
- Brennan, Peter J WA2024-02-03 active