Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0TK callsign genealogy
Currently held by Klingensmith, Thomas J
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 KC0TK's current licensee, walking backwards.
- Klingensmith, Thomas JCOgranted 2013-09-20cancelled 2016-01-05
Successor callsigns
Callsigns held now by people who previously held KC0TK.
- Klingensmith, Thomas JAKgranted 2018-08-21
All historical holders
Every license row we've seen with the callsign KC0TK, oldest first.
- PELLS, MARY K IA2000-01-29 → cancelled 2012-02-07
- Klingensmith, Thomas J AK2016-01-05 → cancelled 2018-08-21