Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2BT callsign genealogy
Currently held by Mueller, John F
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 K2BT's current licensee, walking backwards.
- Smith, Zachary AINgranted 2018-12-19cancelled 2025-03-18
Successor callsigns
Callsigns held now by people who previously held K2BT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K2BT, oldest first.
- Gehrke, Forrest E NJ2004-03-03 → cancelled 2005-11-04
- Mueller, John F NY2017-09-23 → cancelled 2023-02-26
- Smith, Zachary A IN2025-03-18 active