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K4IWO

Available1x3District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderGRINSTEAD JR, SILAS C

License ClassGeneral

Min. Class RequiredGeneral

LocationLAKE WORTH, FL

Grant DateNov 21, 1997

Expiration DateNov 21, 2007

Cancellation DateNov 24, 2009

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K4IWO

Available1x3District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderGRINSTEAD JR, SILAS C

License ClassGeneral

Min. Class RequiredGeneral

LocationLAKE WORTH, FL

Grant DateNov 21, 1997

Expiration DateNov 21, 2007

Cancellation DateNov 24, 2009

Available for ApplicationsNov 22, 2009

K4IWO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by GRINSTEAD JR, SILAS C in LAKE WORTH, FL. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by PERDUE, LOUISE M on Apr 17, 2000. K4IWO has 1 recorded FCC license history event.

CW & Voice Analysis

Morse Code

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

CW Weight: 32 units(Moderate)

Voice Phonetics

Kilo Four India Whiskey Oscar

Readability: 7.5/10(High readability)

This callsign is available now

Requires General license or higher to apply for this callsign format (1x3).

License History

License ExpiredNov 24, 2009

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

PERDUE, LOUISE MFiled Apr 17, 2000
Not awardedFCC ↗
Young III, George LFiled Apr 17, 2000
Not awardedFCC ↗

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FCC data as of Sep 4, 2026

K4IWO FCC Vanity Status: 2 Competing Applications & History