Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1IBM callsign genealogy
Currently held by Bashore Jr, Frank 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 W1IBM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W1IBM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1IBM, oldest first.
- Bashore Jr, Frank W FL2010-01-05 → cancelled 2022-04-05
- Mohri, Masao CT2022-04-22 active