Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD0CZ callsign genealogy
Currently held by Hamrick, Jeremy 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 AD0CZ's current licensee, walking backwards.
- Hamrick, Jeremy APAgranted 2024-10-01cancelled 2024-11-22
Successor callsigns
Callsigns held now by people who previously held AD0CZ.
- THOMPSON, MICHAEL AMNgranted 2025-03-05
All historical holders
Every license row we've seen with the callsign AD0CZ, oldest first.
- THOMPSON, MICHAEL A MN2007-04-12 → cancelled 2014-08-02
- Hamrick, Jeremy A PA2024-11-22 active