Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4CMU callsign genealogy
Currently held by Hornek, Lawrence 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 KR4CMU's current licensee, walking backwards.
- Hornek, Lawrence RKYgranted 2024-01-11cancelled 2025-03-21
Successor callsigns
Callsigns held now by people who previously held KR4CMU.
- Hornek, Lawrence RKYgranted 2025-04-15