Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4LBT callsign genealogy
Currently held by THOMAS, WILLIAM J
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 K4LBT's current licensee, walking backwards.
- THOMAS, WILLIAM JFLgranted 2005-06-14cancelled 2005-07-26
Successor callsigns
Callsigns held now by people who previously held K4LBT.
No current licensee on record previously held this callsign.