Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KE7CZZ callsign genealogy
Currently held by Merck, John D
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 KE7CZZ's current licensee, walking backwards.
- Merck, JohnAZgranted 2018-12-28cancelled 2024-11-23
Successor callsigns
Callsigns held now by people who previously held KE7CZZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KE7CZZ, oldest first.
- Merck, John D AZ2005-02-25 → cancelled 2017-02-28
- Merck, John AZ2024-11-23 active