KB5SIR
Expired2x3District 5
No competing applications on record.
License HolderMARTINS, FREDERICK F
License ClassGeneral
Min. Class RequiredTechnician
LocationMIDDLEBORO, MA
Grant DateJul 16, 2014
Expiration DateJul 16, 2024
Available for ApplicationsJul 17, 2026
KB5SIR is a 2x3 format amateur radio callsign. It is currently registered to MARTINS, FREDERICK F in MIDDLEBORO, MA. There are currently no competing vanity applications or pending FCC filings on record for this callsign. Add it to your watchlist to receive an immediate alert if another operator files a vanity application.
CW & Voice Analysis
Morse Code
-.- -... ..... ... .. .-.
CW Weight: 28 units(Light (fast to send))
Voice Phonetics
Kilo Bravo Five Sierra India Romeo
Readability: 6/10(Good readability)
Available Jul 17, 2026 (6 days remaining)
Requires Technician license or higher to apply for this callsign format (2x3).
License History
- License RenewedJul 16, 2014
- Administrative Update AppliedJan 13, 2005
- License RenewedMay 9, 2003
- License ModifiedAug 16, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
No competing applications on record. Verify on the FCC ULS application search before filing.