Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0TT callsign genealogy
Currently held by GRECO, FRANK S
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 AC0TT's current licensee, walking backwards.
- KLINGE JR, RICHARD FKSgranted 2006-10-11cancelled 2010-11-02
Successor callsigns
Callsigns held now by people who previously held AC0TT.
No current licensee on record previously held this callsign.