Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9BMF callsign genealogy
Currently held by Ciskowski, Thomas 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 W9BMF's current licensee, walking backwards.
- Ciskowski, Thomas WWIgranted 2019-01-31cancelled 2019-02-20
Successor callsigns
Callsigns held now by people who previously held W9BMF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9BMF, oldest first.
- Walder, Verland R TX2005-08-08 → cancelled 2017-11-01
- Ciskowski, Thomas W WI2019-02-20 active