Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1BTM callsign genealogy
Currently held by MCALEAR, BENJAMIN T
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 N1BTM's current licensee, walking backwards.
- MCALEAR, BENJAMIN TMAgranted 2019-07-08cancelled 2019-07-27
Successor callsigns
Callsigns held now by people who previously held N1BTM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1BTM, oldest first.
- ROYDS JR, ROBERT D ME2006-04-04 → cancelled 2018-04-05
- MCALEAR, BENJAMIN T MA2019-07-27 active