Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9DJO callsign genealogy
Currently held by Oldham, David 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 W9DJO's current licensee, walking backwards.
- Oldham, David JINgranted 2016-01-13cancelled 2016-03-08
Successor callsigns
Callsigns held now by people who previously held W9DJO.
No current licensee on record previously held this callsign.