Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA1IBM callsign genealogy
Currently held by PROUT, LEONARD S
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 WA1IBM's current licensee, walking backwards.
- Mohri, MasaoCTgranted 2021-06-21cancelled 2021-09-14
Successor callsigns
Callsigns held now by people who previously held WA1IBM.
- Mohri, MasaoCTgranted 2022-04-22
All historical holders
Every license row we've seen with the callsign WA1IBM, oldest first.
- PROUT, LEONARD S ME1997-06-03 → cancelled 1997-11-27
- Mohri, Masao CT2021-09-14 → cancelled 2022-04-22