Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD0ZZ callsign genealogy
Currently held by Callahan, Terrance R
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 AD0ZZ's current licensee, walking backwards.
- Callahan, Terrance RMOgranted 2016-12-12cancelled 2017-11-15
Successor callsigns
Callsigns held now by people who previously held AD0ZZ.
No current licensee on record previously held this callsign.