CFCallsignFinder

Search Watchlist

Track FCC amateur radio vanity callsign availability. Data updated daily.

Legal & Info

Pricing FAQ Terms of Service Privacy Policy

© 2026 CallsignFinder. All rights reserved.

FCC data sourced from FCC Universal Licensing System. Not affiliated with the FCC.

Watchlist Search Account

Home/Search/K4DFO

← Back to results

K4DFO

Active1x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderO'Connor, David F

License ClassGeneral

Min. Class RequiredGeneral

LocationDelray Beach, FL

Grant DateJul 24, 2018

Expiration DateOct 17, 2028

K4DFO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by O'Connor, David F in Delray Beach, 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 O'Connor, David F on Sep 29, 2008. K4DFO has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 34 units(Moderate)

Voice Phonetics

Kilo Four Delta Foxtrot Oscar

Readability: 8/10(High readability)

License History

License RenewedJul 24, 2018
License ModifiedOct 31, 2008
License IssuedOct 17, 2008
Vanity Callsign GrantedOct 17, 2008

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

O'Connor, David FFiled Sep 29, 2008
Not awardedFCC ↗

Search external databases

QRZ ↗HamQTH ↗

Explore nearby callsigns

← K4DFM K4DFQ →

FCC data as of Sep 3, 2026

K4DFO FCC Vanity Status: 1 Competing Application & History