Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4NFO callsign genealogy
Currently held by YOUNG, COLLEEN 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 K4NFO's current licensee, walking backwards.
- Young, Colleen JNEgranted 2015-08-07cancelled 2015-10-16
Successor callsigns
Callsigns held now by people who previously held K4NFO.
- YOUNG III, GEORGE LNEgranted 2017-12-08
All historical holders
Every license row we've seen with the callsign K4NFO, oldest first.
- YOUNG III, GEORGE L NE2000-05-05 → cancelled 2008-01-23
- YOUNG, COLLEEN J NE2025-11-25 active