N4SBF
Active1x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderHEIN, SHIRLEY L
License ClassGeneral
Min. Class RequiredGeneral
LocationCaldwell, TX
Grant DateMar 25, 2021
Expiration DateMar 25, 2031
N4SBF is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by HEIN, SHIRLEY L in Caldwell, TX. 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 FISHER, SENECA B on Apr 8, 2026. N4SBF has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-. ....- ... -... ..-.
CW Weight: 26 units(Light (fast to send))
Voice Phonetics
November Four Sierra Bravo Foxtrot
Readability: 7/10(Good readability)
License History
- Administrative Update AppliedNov 5, 2021
- License RenewedMar 25, 2021
- Administrative Update AppliedApr 10, 2020
- License RenewedNov 20, 2010
- Administrative Update AppliedDec 15, 2006
- License RenewedSep 10, 1999
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- FISHER, SENECA BFiled Apr 8, 2026Not awardedFCC ↗