Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0LMZ callsign genealogy
Currently held by RAYDO, JOHN S
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 K0LMZ's current licensee, walking backwards.
- KLEMZ, DANIEL WMNgranted 2018-05-01cancelled 2018-06-12
Successor callsigns
Callsigns held now by people who previously held K0LMZ.
- RAYDO, JOHN SCOgranted 2023-03-14
All historical holders
Every license row we've seen with the callsign K0LMZ, oldest first.
- RAYDO, JOHN S MO1997-04-14 → cancelled 2003-06-10
- KLEMZ, DANIEL W MN2018-06-12 active