AA4MO
Active2x2District 4
Competitive callsign — 4 applications filed with the FCC.
License HolderObuchowski, Matthew T
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationChicago, IL
Grant DateMar 27, 2026
Expiration DateMar 27, 2036
AA4MO is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by Obuchowski, Matthew T in Chicago, IL. This callsign has attracted significant interest in the amateur radio community, with 4 vanity applications filed with the FCC. The most recent was submitted by Obuchowski, Matthew T on Mar 9, 2026. AA4MO has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.- .- ....- -- ---
CW Weight: 30 units(Light (fast to send))
Voice Phonetics
Alpha Alpha Four Mike Oscar
Readability: 8.5/10(High readability)
License History
- License IssuedMar 27, 2026
- Vanity Callsign GrantedMar 27, 2026
- License ExpiredMay 18, 2017
- License RenewedFeb 23, 2005
- FRN Association Letter SentFeb 23, 2005
Vanity Application Activity
Competing applications filed with the FCC for this callsign.