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KK4SX

Available2x2District 4

Competitive callsign — 1 application filed with the FCC.

License HolderHARRISON, ROBERT D

License ClassAdvanced

Min. Class RequiredGeneral

LocationFROGMORE, SC

Grant DateNov 3, 1987

Expiration DateNov 3, 1997

Cancellation DateNov 4, 1999

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KK4SX

Available2x2District 4

Competitive callsign — 1 application filed with the FCC.

License HolderHARRISON, ROBERT D

License ClassAdvanced

Min. Class RequiredGeneral

LocationFROGMORE, SC

Grant DateNov 3, 1987

Expiration DateNov 3, 1997

Cancellation DateNov 4, 1999

Available for ApplicationsNov 4, 1999

KK4SX is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by HARRISON, ROBERT D in FROGMORE, SC. 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 Little, Charles M on Mar 6, 2025. KK4SX has 1 recorded FCC license history event.

CW & Voice Analysis

Morse Code

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

CW Weight: 32 units(Moderate)

Voice Phonetics

Kilo Kilo Four Sierra X-ray

Readability: 7.5/10(High readability)

This callsign is available now

Requires General license or higher to apply for this callsign format (2x2).

License History

License ExpiredNov 4, 1999

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Little, Charles MFiled Mar 6, 2025
Not awardedFCC ↗

Search external databases

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FCC data as of Jul 31, 2026

KK4SX FCC Vanity Status: 1 Competing Application & History