Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4WRW callsign genealogy
Currently held by WYKOFF, WILLIAM R
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 N4WRW's current licensee, walking backwards.
- Wykoff, William RFLgranted 2005-02-17cancelled 2007-07-03
Successor callsigns
Callsigns held now by people who previously held N4WRW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4WRW, oldest first.
- KREIBICH, MICHAEL K AL1989-08-15 → cancelled 2001-08-16
- WYKOFF, WILLIAM R FL2017-04-06 active