Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KV4RO callsign genealogy
Currently held by JOHNSON, THOMAS B
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 KV4RO's current licensee, walking backwards.
- JOHNSON, THOMAS BFLgranted 2013-08-13cancelled 2013-10-17
Successor callsigns
Callsigns held now by people who previously held KV4RO.
- JOHNSON, THOMAS BFLgranted 2013-12-07cancelled 2026-03-06