Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AF4OB callsign genealogy
Currently held by GRACE, RONALD 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 AF4OB's current licensee, walking backwards.
- KN4XKcancelledcancelled 1999-04-01
Successor callsigns
Callsigns held now by people who previously held AF4OB.
No current licensee on record previously held this callsign.