Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N7ZMW callsign genealogy
Currently held by Krigbaum, Greg
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 N7ZMW's current licensee, walking backwards.
- Krigbaum, GregAZgranted 2017-04-05cancelled 2017-04-25
Successor callsigns
Callsigns held now by people who previously held N7ZMW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7ZMW, oldest first.
- BRADFORD, STEVEN B WA1993-10-19 → cancelled 2005-10-20
- Krigbaum, Greg WA2017-04-25 active