Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5FRM callsign genealogy
Currently held by SWITZER, JOSEPH R
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 K5FRM's current licensee, walking backwards.
- SWITZER, JOSEPH RTXgranted 2007-12-18cancelled 2016-12-23
Successor callsigns
Callsigns held now by people who previously held K5FRM.
No current licensee on record previously held this callsign.