Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1YWW callsign genealogy
Currently held by SHANBAR, SIDNEY
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 K1YWW's current licensee, walking backwards.
- Razdan, RikkiMAgranted 2015-04-17cancelled 2015-11-03
Successor callsigns
Callsigns held now by people who previously held K1YWW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1YWW, oldest first.
- SHANBAR, SIDNEY MA1991-02-26 → cancelled 2003-02-27
- Razdan, Rikki MA2025-09-24 active