Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AG4ZM callsign genealogy
Currently held by PORTER, EDGAR D
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 AG4ZM's current licensee, walking backwards.
- PORTER, EDGAR DFLgranted 2001-03-28cancelled 2003-06-04
Successor callsigns
Callsigns held now by people who previously held AG4ZM.
No current licensee on record previously held this callsign.