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KC1S

Active2x1District 1

Competitive callsign — 5 applications filed with the FCC.

License HolderStillman, Charles M

License ClassAmateur Extra

Min. Class RequiredAmateur Extra

LocationSeattle, WA

Grant DateDec 27, 2017

Expiration DateMar 14, 2028

KC1S is a highly sought-after 2x1 format amateur radio callsign. The license is currently held by Stillman, Charles M in Seattle, WA. This callsign has attracted significant interest in the amateur radio community, with 5 vanity applications filed with the FCC. The most recent was submitted by POMROY, BIRLEM B on Mar 17, 2011. KC1S has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 31 units(Moderate)

Voice Phonetics

Kilo Charlie One Sierra

Readability: 8/10(High readability)

License History

License RenewedDec 27, 2017
License IssuedMar 14, 2008
Vanity Callsign GrantedMar 14, 2008
License ExpiredNov 29, 2007

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

POMROY, BIRLEM BFiled Mar 17, 2011
Not awardedFCC ↗
Dempsey, SeanFiled Feb 25, 2008
Not awardedFCC ↗
Stillman, Charles MFiled Feb 25, 2008
Not awardedFCC ↗
BADMAN, LEE HFiled Feb 19, 2008

Search external databases

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Explore nearby callsigns

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FCC data as of Sep 3, 2026

Not awarded

Donigan, Megan KFiled Feb 19, 2008

Not awardedFCC ↗

KC1S FCC Vanity Status: 5 Competing Applications & History