Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7SHX callsign genealogy
Currently held by MULHORN, JOHN D
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 K7SHX's current licensee, walking backwards.
- Harper, Steven HWAgranted 2014-07-26cancelled 2018-07-27
Successor callsigns
Callsigns held now by people who previously held K7SHX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7SHX, oldest first.
- MULHORN, JOHN D AZ1997-05-28 → cancelled 2009-05-29
- Harper, Steven H WA2018-07-27 active