Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0MTP callsign genealogy
Currently held by Proctor, Sarah N
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 K0MTP's current licensee, walking backwards.
- Polewski, MarcinCOgranted 2024-11-14cancelled 2024-12-03
Successor callsigns
Callsigns held now by people who previously held K0MTP.
- PROCTOR, Sarah NORgranted 2019-07-23
All historical holders
Every license row we've seen with the callsign K0MTP, oldest first.
- Proctor, Sarah N MO2016-12-20 → cancelled 2019-07-23
- Polewski, Marcin CO2024-12-03 active