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KO4HLM

Available2x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderLeone, Mario

License ClassTechnician

Min. Class RequiredTechnician

LocationBelle Vernon, PA

Grant DateSep 17, 2020

Expiration DateSep 17, 2030

Cancellation DateNov 17, 2020

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KO4HLM

Available2x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderLeone, Mario

License ClassTechnician

Min. Class RequiredTechnician

LocationBelle Vernon, PA

Grant DateSep 17, 2020

Expiration DateSep 17, 2030

Cancellation DateNov 17, 2020

Available for ApplicationsNov 18, 2022

KO4HLM is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Leone, Mario in Belle Vernon, PA. 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 Helm, Adam C on Mar 13, 2023. KO4HLM has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 39 units(Moderate)

Voice Phonetics

Kilo Oscar Four Hotel Lima Mike

Readability: 8/10(High readability)

This callsign is available now

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

License History

License CanceledNov 17, 2020
License ModifiedOct 14, 2020
System-Generated GrantSep 17, 2020
License IssuedSep 17, 2020

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Helm, Adam CFiled Mar 13, 2023
Not awardedFCC ↗

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FCC data as of Sep 5, 2026

KO4HLM FCC Vanity Status: 1 Competing Application & History