Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KW4PM callsign genealogy
Currently held by Kotlas Sr, John 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 KW4PM's current licensee, walking backwards.
- Robbins, Herbert MVAgranted 2020-03-18cancelled 2023-05-27
Successor callsigns
Callsigns held now by people who previously held KW4PM.
- Kotlas Sr, John JNCgranted 2016-01-26
All historical holders
Every license row we've seen with the callsign KW4PM, oldest first.
- Kotlas Sr, John J NC2016-01-06 → cancelled 2016-01-26
- Robbins, Herbert M VA2023-05-27 active