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/K4MDF

← Back to results

K4MDF

Active1x3District 4

Competitive callsign — 4 applications filed with the FCC.

License HolderDISMUKES, ROBERT K

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationSan Jose, CA

Grant DateJul 26, 2018

Expiration DateOct 21, 2028

K4MDF is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by DISMUKES, ROBERT K in San Jose, CA. 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 Fleming, Martin D on Aug 5, 2010. K4MDF has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 31 units(Moderate)

Voice Phonetics

Kilo Four Mike Delta Foxtrot

Readability: 8.5/10(High readability)

License History

License RenewedJul 26, 2018
Administrative Update AppliedNov 23, 2016
License RenewedAug 8, 2008
FRN Association Email SentAug 8, 2008

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Fleming, Martin DFiled Aug 5, 2010
Not awardedFCC ↗
Fleming, Martin DFiled Jul 12, 2010
DismissedFCC ↗
Fleming, Martin DFiled Sep 17, 2009
Not awardedFCC ↗
FUSELIER, CHRISTOPHERFiled Sep 17, 2009

Search external databases

QRZ ↗HamQTH ↗

Explore nearby callsigns

← K4MDE K4MDG →

FCC data as of Jul 9, 2026

Not awarded

K4MDF FCC Vanity Status: 4 Competing Applications & History