Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4AZT callsign genealogy
Currently held by Mortensen, Thomas M
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 K4AZT's current licensee, walking backwards.
- Mortensen, ThomasTNgranted 2020-05-21cancelled 2020-09-11
Successor callsigns
Callsigns held now by people who previously held K4AZT.
No current licensee on record previously held this callsign.