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AI4XX

Available2x2District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderHAEDERLI, ALFRED F

License ClassAdvanced

Min. Class RequiredGeneral

LocationMINNEAPOLIS, MN

Grant DateMar 10, 2015

Expiration DateMar 10, 2025

Cancellation DateAug 23, 2021

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AI4XX

Available2x2District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderHAEDERLI, ALFRED F

License ClassAdvanced

Min. Class RequiredGeneral

LocationMINNEAPOLIS, MN

Grant DateMar 10, 2015

Expiration DateMar 10, 2025

Cancellation DateAug 23, 2021

Available for ApplicationsAug 24, 2023

AI4XX is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by HAEDERLI, ALFRED F in MINNEAPOLIS, MN. 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 COLCLOUGH, DOUGLAS D on Feb 20, 2015. AI4XX has 6 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 29 units(Light (fast to send))

Voice Phonetics

Alpha India Four X-ray X-ray

Readability: 7.5/10(High readability)

This callsign is available now

Requires General license or higher to apply for this callsign format (2x2).

License History

License CanceledAug 23, 2021
License IssuedMar 10, 2015
Vanity Callsign GrantedMar 10, 2015
License CanceledApr 4, 2008
License IssuedMay 4, 2007
System-Generated GrantMay 4, 2007

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

COLCLOUGH, DOUGLAS DFiled Feb 20, 2015
Not awardedFCC ↗
RAY, BOBBY GFiled Sep 27, 2010
Not awardedFCC ↗

Search external databases

QRZ ↗HamQTH ↗

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FCC data as of Sep 4, 2026

AI4XX FCC Vanity Status: 2 Competing Applications & History