NA4BL
Active2x2District 4
Competitive callsign — 2 applications filed with the FCC.
License HolderWILLIAMS, MARK L
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationCoudersport, PA
Grant DateMar 10, 2026
Expiration DateMar 10, 2036
NA4BL is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by WILLIAMS, MARK L in Coudersport, PA. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by LAYNE, BRUCE E on Apr 11, 2019. NA4BL has 2 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-. .- ....- -... .-..
CW Weight: 27 units(Light (fast to send))
Voice Phonetics
November Alpha Four Bravo Lima
Readability: 7.5/10(High readability)
License History
- License IssuedApr 13, 2026
- System-Generated GrantApr 13, 2026
Vanity Application Activity
Competing applications filed with the FCC for this callsign.