Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AG4SV callsign genealogy
Currently held by Birch, Thomas 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 AG4SV's current licensee, walking backwards.
- Birch, Thomas RGAgranted 2002-01-03cancelled 2002-05-30
Successor callsigns
Callsigns held now by people who previously held AG4SV.
- Birch, Thomas RNCgranted 2004-03-10cancelled 2008-03-21