N1MBT
Active1x3District 1
Competitive callsign — 1 application filed with the FCC.
License HolderPortwine, Richard G
License ClassGeneral
Min. Class RequiredGeneral
LocationGorham, ME
Grant DateFeb 24, 2026
Expiration DateFeb 24, 2036
N1MBT is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Portwine, Richard G in Gorham, ME. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by Portwine, Richard G on Feb 5, 2026. N1MBT has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-. .---- -- -... -
CW Weight: 32 units(Moderate)
Voice Phonetics
November One Mike Bravo Tango
Readability: 8/10(High readability)
License History
- License IssuedFeb 24, 2026
- Vanity Callsign GrantedFeb 24, 2026
- License ExpiredApr 23, 2024
- License RenewedFeb 1, 2012
- License RenewedFeb 1, 2002
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Portwine, Richard GFiled Feb 5, 2026Not awardedFCC ↗