Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AF4IO callsign genealogy
Currently held by DENNIS, DONALD J
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 AF4IO's current licensee, walking backwards.
- DENNIS, DONALD Jcancelled 1998-03-04
Successor callsigns
Callsigns held now by people who previously held AF4IO.
No current licensee on record previously held this callsign.