Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NM5K callsign genealogy
Currently held by KEITH, MARK 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 NM5K's current licensee, walking backwards.
- Polmanter, Steve RNMgranted 2018-11-28cancelled 2019-02-02
Successor callsigns
Callsigns held now by people who previously held NM5K.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NM5K, oldest first.
- KEITH, MARK B TX2006-11-22 → cancelled 2018-12-19
- Polmanter, Steve R NM2019-02-02 active