Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4BAK callsign genealogy
Currently held by RADIO GEEKS
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 K4BAK's current licensee, walking backwards.
- KELLER, BRUCE AFLgranted 2007-10-04cancelled 2014-01-28
Successor callsigns
Callsigns held now by people who previously held K4BAK.
- NA5RCcancelledNorth American Radio CommunicationsTXgranted 2014-08-16cancelled 2015-04-17
All historical holders
Every license row we've seen with the callsign K4BAK, oldest first.
- RADIO GEEKS TX1998-05-06 → cancelled 2004-08-13
- KELLER, BRUCE A FL2014-01-28 → cancelled 2026-03-07