Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4YCY callsign genealogy
Currently held by URBANSKI, DENNIS M
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 KB4YCY's current licensee, walking backwards.
- Wandemaker, Denise MFLgranted 2020-01-09cancelled 2020-01-28
Successor callsigns
Callsigns held now by people who previously held KB4YCY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4YCY, oldest first.
- URBANSKI, DENNIS M FL1997-03-20 → cancelled 2009-03-21
- Wandemaker, Denise M FL2020-01-28 active