Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OYY callsign genealogy
Currently held by STEMBRIDGE, ROGER W
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 K4OYY's current licensee, walking backwards.
- STEMBRIDGE, ROGER WGAgranted 2009-07-20cancelled 2010-01-15
Successor callsigns
Callsigns held now by people who previously held K4OYY.
No current licensee on record previously held this callsign.