Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0GBM callsign genealogy
Currently held by Martz, Gregory 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 K0GBM's current licensee, walking backwards.
- Martz, Gregory BWAgranted 2007-05-09cancelled 2007-06-02
Successor callsigns
Callsigns held now by people who previously held K0GBM.
- Martz, Gregory BWAgranted 2019-04-12