Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N7MKM callsign genealogy
Currently held by CARLSON, BILLY H
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 N7MKM's current licensee, walking backwards.
- Mengel, Marian KORgranted 2014-06-16cancelled 2015-03-17
Successor callsigns
Callsigns held now by people who previously held N7MKM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7MKM, oldest first.
- CARLSON, BILLY H WA1989-05-23 → cancelled 2001-05-24
- Mengel, Marian K OR2025-03-11 active