Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ZCZ callsign genealogy
Currently held by Blaszczak, Michael A
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 K7ZCZ's current licensee, walking backwards.
- Blaszczak, Michael AWAgranted 2016-08-18cancelled 2016-09-07
Successor callsigns
Callsigns held now by people who previously held K7ZCZ.
No current licensee on record previously held this callsign.