Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN4OSG callsign genealogy
Currently held by CHRISTOPHER, ROBERT 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 KN4OSG's current licensee, walking backwards.
- CHRISTOPHER, ROBERT DFLgranted 2012-09-10cancelled 2018-08-28
Successor callsigns
Callsigns held now by people who previously held KN4OSG.
No current licensee on record previously held this callsign.