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/K4ARX

← Back to results

K4ARX

Active1x3District 4

Competitive callsign — 7 applications filed with the FCC.

License HolderBUDDE, EUGENE J

License ClassGeneral

Min. Class RequiredGeneral

LocationCAIRO, NE

Grant DateJun 16, 2020

Expiration DateJun 16, 2030

K4ARX is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by BUDDE, EUGENE J in CAIRO, NE. This callsign has attracted significant interest in the amateur radio community, with 7 vanity applications filed with the FCC. The most recent was submitted by Mc Elhannon, William D on Apr 12, 2010. K4ARX has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 31 units(Moderate)

Voice Phonetics

Kilo Four Alpha Romeo X-ray

Readability: 7.5/10(High readability)

License History

Administrative Update AppliedJul 19, 2023
License RenewedJun 16, 2020
License IssuedApr 30, 2010
Vanity Callsign GrantedApr 30, 2010

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Mc Elhannon, William DFiled Apr 12, 2010
Not awardedFCC ↗
Guo, JoannaFiled Nov 12, 2009
DismissedFCC ↗
Mc Elhannon, William DFiled Nov 12, 2009
DismissedFCC ↗
Kahler, PattiFiled Jan 14, 2008

Search external databases

QRZ ↗HamQTH ↗

Explore nearby callsigns

← K4ARV K4ARY →

FCC data as of Sep 3, 2026

Not awarded

Russillo, Paul FFiled Jan 14, 2008

Not awardedFCC ↗

Hiatt, Adam AFiled Mar 9, 2007

Not awardedFCC ↗

Lightcap, Helen KFiled Mar 9, 2007

Not awardedFCC ↗

K4ARX FCC Vanity Status: 7 Competing Applications & History