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KN2EFI

Available2x3District 2

Competitive callsign — 1 application filed with the FCC.

License HolderStillinger, Constance

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationPalo Alto, CA

Grant DateApr 16, 2022

Expiration DateApr 16, 2032

Cancellation DateApr 7, 2023

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KN2EFI

Available2x3District 2

Competitive callsign — 1 application filed with the FCC.

License HolderStillinger, Constance

License ClassAmateur Extra

Min. Class RequiredTechnician

LocationPalo Alto, CA

Grant DateApr 16, 2022

Expiration DateApr 16, 2032

Cancellation DateApr 7, 2023

Available for ApplicationsApr 8, 2025

KN2EFI is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Stillinger, Constance in Palo Alto, CA. 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 Stillinger, Constance on Mar 29, 2022. KN2EFI has 5 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 31 units(Moderate)

Voice Phonetics

Kilo November Two Echo Foxtrot India

Readability: 6.5/10(Good readability)

This callsign is available now

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

License History

License CanceledApr 7, 2023
License ModifiedMar 10, 2023
License ModifiedAug 19, 2022
License IssuedApr 16, 2022
Vanity Callsign GrantedApr 16, 2022

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Stillinger, ConstanceFiled Mar 29, 2022
Not awardedFCC ↗

Search external databases

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FCC data as of Sep 4, 2026

KN2EFI FCC Vanity Status: 1 Competing Application & History