Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB0UM callsign genealogy
Currently held by Limpert, George W
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 AB0UM's current licensee, walking backwards.
- Limpert, George WMOgranted 2001-12-03cancelled 2002-03-28
Successor callsigns
Callsigns held now by people who previously held AB0UM.
No current licensee on record previously held this callsign.