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W4SBL

Active1x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderSANIBEL EMERGENCY RADIO UNIT

Min. Class RequiredGeneral

LocationSanibel, FL

Grant DateSep 16, 2023

Expiration DateJun 10, 2033

W4SBL is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by SANIBEL EMERGENCY RADIO UNIT in Sanibel, FL. 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 SANIBEL EMERGENCY RADIO UNIT on May 21, 2003. W4SBL has 5 recorded FCC license history events.

CW & Voice Analysis

Morse Code

.-- ....- ... -... .-..

CW Weight: 29 units(Light (fast to send))

Voice Phonetics

Whiskey Four Sierra Bravo Lima

Readability: 7.5/10(High readability)

License History

License RenewedSep 16, 2023
License RenewedSep 19, 2013
License ModifiedDec 27, 2006
License IssuedJun 10, 2003
Vanity Callsign GrantedJun 10, 2003

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

SANIBEL EMERGENCY RADIO UNITFiled May 21, 2003
Not awardedFCC ↗

Search external databases

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FCC data as of Sep 4, 2026

W4SBL FCC Vanity Status: 1 Competing Application & History