Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA4UM callsign genealogy
Currently held by CAMPBELL JR, CLARENCE D
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 AA4UM's current licensee, walking backwards.
- Campbell Jr, Clarence DVAgranted 2014-11-19cancelled 2014-12-19
Successor callsigns
Callsigns held now by people who previously held AA4UM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA4UM, oldest first.
- CAMPBELL JR, CLARENCE D VA1996-03-21 → cancelled 2008-03-22
- Campbell Jr, Clarence D VA2014-12-19 active