Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ZM callsign genealogy
Currently held by SAWDERS, WILLIAM J
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 K7ZM's current licensee, walking backwards.
- SAWDERS, WILLIAM JNMgranted 2018-02-21cancelled 2018-03-20
Successor callsigns
Callsigns held now by people who previously held K7ZM.
- SAWDERS, WILLIAM JNMgranted 2018-02-21cancelled 2018-03-20
All historical holders
Every license row we've seen with the callsign K7ZM, oldest first.
- SAWDERS, WILLIAM J NM2014-01-08 → cancelled 2018-02-21
- SAWDERS, WILLIAM J NM2018-03-20 active