Confidence: Medium · Source: FCC ULS · As of 2026-09-11
K7PTO callsign genealogy
Currently held by HENEN, JOHN A
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 K7PTO's current licensee, walking backwards.
- Krynsky, TomasWAgranted 2023-03-15cancelled 2023-04-18
Successor callsigns
Callsigns held now by people who previously held K7PTO.
- Krynsky, Tomas .WAgranted 2024-06-04
All historical holders
Every license row we've seen with the callsign K7PTO, oldest first.
- HENEN, JOHN A MT2008-05-13 → cancelled 2020-01-15
- Krynsky, Tomas . WA2023-04-18 → cancelled 2024-06-04