Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4HA callsign genealogy
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 AB4HA's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held AB4HA.
- GEHRING, DONALD JOHgranted 2013-09-24cancelled 2026-03-06