Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0BUM callsign genealogy
Currently held by Graham, Robert H
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 N0BUM's current licensee, walking backwards.
- GRAHAM, ROBERT HAZgranted 1996-02-23cancelled 2000-06-27
Successor callsigns
Callsigns held now by people who previously held N0BUM.
No current licensee on record previously held this callsign.