Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0COF callsign genealogy
Currently held by WAWRZYNIAK JR, MAX E
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 K0COF's current licensee, walking backwards.
- WAWRZYNIAK, THOMASMOgranted 2003-12-04cancelled 2007-04-10
Successor callsigns
Callsigns held now by people who previously held K0COF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0COF, oldest first.
- WAWRZYNIAK JR, MAX E MO1993-08-24 → cancelled 2005-08-25
- WAWRZYNIAK, THOMAS MO2017-02-07 active