Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OLR callsign genealogy
Currently held by Butler, Jerry A
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 K4OLR's current licensee, walking backwards.
- Butler, Jerry AGAgranted 2024-10-08cancelled 2024-12-17
Successor callsigns
Callsigns held now by people who previously held K4OLR.
No current licensee on record previously held this callsign.