Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD7JM callsign genealogy
Currently held by McCauley, Robert H
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 AD7JM's current licensee, walking backwards.
- MUFFETT, JIMIDgranted 2009-04-30cancelled 2009-06-13
Successor callsigns
Callsigns held now by people who previously held AD7JM.
- McCauley, Robert HWAgranted 2026-06-23
All historical holders
Every license row we've seen with the callsign AD7JM, oldest first.
- McCauley, Robert H WA2006-08-31 → cancelled 2006-09-19
- MUFFETT, JIM UT2019-04-22 active