Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN7MVO callsign genealogy
Currently held by HEROLD, MARC W
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 KN7MVO's current licensee, walking backwards.
- Pfeiffer Jr, Joseph JNMgranted 2013-06-19cancelled 2014-12-02
Successor callsigns
Callsigns held now by people who previously held KN7MVO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KN7MVO, oldest first.
- HEROLD, MARC W WA1990-11-13 → cancelled 2002-11-14
- Pfeiffer Jr, Joseph J NM2024-09-05 active