Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT1ZZZ callsign genealogy
Currently held by TISDALE, MARK
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 KT1ZZZ's current licensee, walking backwards.
- TISDALE, MARKNMgranted 2024-09-04cancelled 2024-09-24
Successor callsigns
Callsigns held now by people who previously held KT1ZZZ.
No current licensee on record previously held this callsign.