CFCallsignFinder

Search Watchlist

Track FCC amateur radio vanity callsign availability. Data updated daily.

Legal & Info

Pricing FAQ Terms of Service Privacy Policy

© 2026 CallsignFinder. All rights reserved.

FCC data sourced from FCC Universal Licensing System. Not affiliated with the FCC.

Watchlist Search Account

Home/Search/AA4SZ

← Back to results

AA4SZ

Active2x2District 4

Competitive callsign — 1 application filed with the FCC.

License HolderHEUERMAN, HENRY R

License ClassGeneral

Min. Class RequiredGeneral

LocationFraser, CO

Grant DateOct 22, 2021

Expiration DateOct 22, 2031

AA4SZ is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by HEUERMAN, HENRY R in Fraser, CO. 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 Commer, Gary on Oct 4, 2021. AA4SZ has 8 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 26 units(Light (fast to send))

Voice Phonetics

Alpha Alpha Four Sierra Zulu

Readability: 7.5/10(High readability)

License History

Vanity Callsign GrantedOct 22, 2021
License IssuedOct 22, 2021
License ExpiredJun 10, 2021
License RenewedJun 2, 2009
FRN Association Email SentMay 30, 2009
FRN Association Letter SentSep 16, 2004
Internal Correction AppliedSep 16, 2004
Internal Correction AppliedSep 16, 2004

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Commer, GaryFiled Oct 4, 2021
Not awardedFCC ↗

Search external databases

QRZ ↗HamQTH ↗

Explore nearby callsigns

← AA4SY AA4TA →

FCC data as of Sep 4, 2026

AA4SZ FCC Vanity Status: 1 Competing Application & History