Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB3UM callsign genealogy
Currently held by STORCHAN, GEOFFREY B
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 AB3UM's current licensee, walking backwards.
- STORCHAN, GEOFFREY BDCgranted 2004-10-19cancelled 2011-04-05
Successor callsigns
Callsigns held now by people who previously held AB3UM.
- STORCHAN, GEOFFREY BDCgranted 2020-05-29cancelled 2021-11-23