Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AG4UM callsign genealogy
Currently held by Seidenberg, Everett F
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 AG4UM's current licensee, walking backwards.
- Seidenberg, Everett FFLgranted 1999-07-06cancelled 2002-06-28
Successor callsigns
Callsigns held now by people who previously held AG4UM.
- Seidenberg, Everett FFLgranted 2012-12-07cancelled 2024-12-10