Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AG4AO callsign genealogy
Currently held by Bastings, Mark 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 AG4AO's current licensee, walking backwards.
- BASTINGS, MARK SFLgranted 1995-12-02cancelled 2000-07-19
Successor callsigns
Callsigns held now by people who previously held AG4AO.
- Bastings, Mark SFLgranted 2021-03-25