Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4TBL callsign genealogy
Currently held by TURNBULL, ALASDAIR
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 K4TBL's current licensee, walking backwards.
- TURNBULL, ALASDAIRKYgranted 2021-12-13cancelled 2022-01-07
Successor callsigns
Callsigns held now by people who previously held K4TBL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4TBL, oldest first.
- PARKS, JAMES G NC2007-01-25 → cancelled 2019-04-09
- TURNBULL, ALASDAIR KY2022-01-07 active