Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7MHN callsign genealogy
Currently held by KLINGLER, WILLIAM 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 W7MHN's current licensee, walking backwards.
- KLINGLER, TREVOR RIDgranted 2016-05-11cancelled 2017-02-14
Successor callsigns
Callsigns held now by people who previously held W7MHN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7MHN, oldest first.
- KLINGLER, WILLIAM B ID2007-08-11 → cancelled 2015-01-28
- KLINGLER, TREVOR R ID2017-02-14 active