Confidence: Medium · Source: FCC ULS · As of 2026-09-11
W4GKB callsign genealogy
Currently held by LIVINGSTON SR, THOMAS C
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 W4GKB's current licensee, walking backwards.
- Brummer, Gerald KFLgranted 2007-11-09cancelled 2007-12-04
Successor callsigns
Callsigns held now by people who previously held W4GKB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4GKB, oldest first.
- LIVINGSTON SR, THOMAS C NC1994-07-15 → cancelled 2006-07-18
- Brummer, Gerald K FL2017-09-29 active