Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB0WB callsign genealogy
Currently held by Marx, Gregory G
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 AB0WB's current licensee, walking backwards.
- GILLAM, DANIEL JMOgranted 2018-04-17
Successor callsigns
Callsigns held now by people who previously held AB0WB.
All historical holders
Every license row we've seen with the callsign AB0WB, oldest first.
- Marx, Gregory G MN1997-12-22 → cancelled 2006-12-12
- GILLAM, DANIEL J MO2018-02-16 → cancelled 2018-04-17