Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1YWM callsign genealogy
Currently held by Bulanowski, Piotr 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 KB1YWM's current licensee, walking backwards.
- Bulanowski, Piotr WNHgranted 2012-10-10cancelled 2012-11-09
Successor callsigns
Callsigns held now by people who previously held KB1YWM.
No current licensee on record previously held this callsign.