Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4B callsign genealogy
Currently held by BLACK SR, THOMAS L
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 KR4B's current licensee, walking backwards.
- Randles, Kevin HALgranted 2001-03-22cancelled 2003-09-30
- KC4SJOno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KR4B.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KR4B, oldest first.
- BLACK SR, THOMAS L AL1994-10-20 → cancelled 2000-11-16
- Randles, Kevin H AL2023-08-04 active