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W4DIO

Available1x3District 4

Competitive callsign — 4 applications filed with the FCC.

License HolderROBERT, ROLAND J

License ClassAdvanced

Min. Class RequiredGeneral

LocationSEBRING, FL

Grant DateJul 3, 2020

Expiration DateJul 3, 2030

Cancellation DateDec 1, 2020

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W4DIO

Available1x3District 4

Competitive callsign — 4 applications filed with the FCC.

License HolderROBERT, ROLAND J

License ClassAdvanced

Min. Class RequiredGeneral

LocationSEBRING, FL

Grant DateJul 3, 2020

Expiration DateJul 3, 2030

Cancellation DateDec 1, 2020

Available for ApplicationsDec 2, 2022

W4DIO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by ROBERT, ROLAND J in SEBRING, FL. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Martin, Sharon M on Aug 22, 2023. W4DIO has 3 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 30 units(Light (fast to send))

Voice Phonetics

Whiskey Four Delta India Oscar

Readability: 7.5/10(High readability)

This callsign is available now

Requires General license or higher to apply for this callsign format (1x3).

License History

License CanceledDec 1, 2020
License IssuedJul 3, 2020
Vanity Callsign GrantedJul 3, 2020

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Martin, Sharon MFiled Aug 22, 2023
Not awardedFCC ↗
Kniss, William FFiled Jun 15, 2020
Not awardedFCC ↗
BARNELL, HUNTER AFiled Jan 23, 2020
Not awardedFCC ↗
VAUGHAN, JOHN CFiled Oct 17, 2003

Search external databases

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← W4DIN W4DIP →

FCC data as of Sep 3, 2026

Not awarded

FCC ↗

W4DIO FCC Vanity Status: 4 Competing Applications & History