Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0GP callsign genealogy
Currently held by Madigan, John
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 AC0GP's current licensee, walking backwards.
- Madigan, JohnMOgranted 2001-05-21cancelled 2007-03-09
Successor callsigns
Callsigns held now by people who previously held AC0GP.
No current licensee on record previously held this callsign.