Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0CPA callsign genealogy
Currently held by LARSON, NICHOLAS 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 K0CPA's current licensee, walking backwards.
- LARSON, NICHOLAS MTXgranted 2022-02-03cancelled 2022-02-23
Successor callsigns
Callsigns held now by people who previously held K0CPA.
- McMahon Jr, Martin GORgranted 2019-07-12
All historical holders
Every license row we've seen with the callsign K0CPA, oldest first.
- Howard, Kenneth F CO1999-06-10 → cancelled 2011-06-11
- McMahon Jr, Martin G OR2018-03-27 → cancelled 2019-07-12
- LARSON, NICHOLAS M TX2022-02-23 active