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KC1DEF

Expired2x3District 1

Competitive callsign — 1 application filed with the FCC.

License HolderMAHRENHOLZ, BOB G

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationTULLAHOMA, TN

Grant DateJan 30, 2015

Expiration DateJan 30, 2025

Available for ApplicationsJan 31, 2027

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KC1DEF

Expired2x3District 1

Competitive callsign — 1 application filed with the FCC.

License HolderMAHRENHOLZ, BOB G

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationTULLAHOMA, TN

Grant DateJan 30, 2015

Expiration DateJan 30, 2025

Available for ApplicationsJan 31, 2027

KC1DEF is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by MAHRENHOLZ, BOB G in TULLAHOMA, TN. 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 Forslund, Chris W on May 1, 2017. KC1DEF has 2 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 40 units(Moderate)

Voice Phonetics

Kilo Charlie One Delta Echo Foxtrot

Readability: 7.5/10(High readability)

Available Jan 31, 2027 (205 days remaining)

Requires Technician license or higher to apply for this callsign format (2x3).

License History

System-Generated GrantJan 30, 2015
License IssuedJan 30, 2015

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Forslund, Chris WFiled May 1, 2017
Not awardedFCC ↗

Search external databases

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FCC data as of Jul 10, 2026

KC1DEF FCC Vanity Status: 1 Competing Application & History