Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ7TK callsign genealogy
Currently held by CRUMPACKER, WALTER L
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 KJ7TK's current licensee, walking backwards.
- Kroner, Thomas MWAgranted 2018-11-07cancelled 2024-11-19
Successor callsigns
Callsigns held now by people who previously held KJ7TK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ7TK, oldest first.
- CRUMPACKER, WALTER L NV2005-03-30 → cancelled 2017-06-21
- Kroner, Thomas M WA2024-11-19 active