Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ0C callsign genealogy
Currently held by O'Connor, Mike
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 KZ0C's current licensee, walking backwards.
- O'Connor, MikeMNgranted 2007-03-27cancelled 2007-04-14
Successor callsigns
Callsigns held now by people who previously held KZ0C.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KZ0C, oldest first.
- BOHNSACK, JAMES W IA1997-04-07 → cancelled 2002-12-15
- O'Connor, Mike WI2017-02-22 active