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KP4DU

Active2x2District 4

Competitive callsign — 1 application filed with the FCC.

License HolderVALLE, RAMON T

License ClassAdvanced

Min. Class RequiredGeneral

LocationISABELA, PR

Grant DateApr 17, 2018

Expiration DateApr 17, 2028

KP4DU is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by VALLE, RAMON T in ISABELA, PR. 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 CORDERO, FRANCISCO on Nov 12, 2002. KP4DU has 2 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 32 units(Moderate)

Voice Phonetics

Kilo Papa Four Delta Uniform

Readability: 7.5/10(High readability)

License History

License RenewedApr 17, 2018
License RenewedJan 2, 2008

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

CORDERO, FRANCISCOFiled Nov 12, 2002
Not awardedFCC ↗

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FCC data as of Sep 3, 2026

KP4DU FCC Vanity Status: 1 Competing Application & History