Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4FRO callsign genealogy
Currently held by RENFROW, JOHN W
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 K4FRO's current licensee, walking backwards.
- Renfrow, John WKYgranted 2005-05-16cancelled 2011-01-25
Successor callsigns
Callsigns held now by people who previously held K4FRO.
- SPILLER, BILLY WVAgranted 1996-06-18cancelled 2008-06-19