Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB7GMM callsign genealogy
Currently held by Underwood, Patricia M
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 KB7GMM's current licensee, walking backwards.
- Underwood, Patricia MORgranted 2017-10-25cancelled 2017-12-02
Successor callsigns
Callsigns held now by people who previously held KB7GMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB7GMM, oldest first.
- POWERS, MICHAEL A UT1998-10-05 → cancelled 2010-10-06
- Underwood, Patricia M OR2017-12-02 active