Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BTL callsign genealogy
Currently held by WITENBARGER JR, HAROLD E
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 K4BTL's current licensee, walking backwards.
- Welch, MyraTNgranted 2024-08-29cancelled 2024-09-27
Successor callsigns
Callsigns held now by people who previously held K4BTL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BTL, oldest first.
- WITENBARGER JR, HAROLD E TN2011-07-19 → cancelled 2023-08-29
- Welch, Myra TN2024-09-27 active