AA4IO
Available2x2District 4
Competitive callsign — 7 applications filed with the FCC.
License HolderGRAVES, RICHARD M
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationOak Ridge, TN
Grant DateJul 8, 2014
Expiration DateJul 8, 2024
Cancellation DateJul 7, 2021
Available for ApplicationsJul 8, 2023
AA4IO is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by GRAVES, RICHARD M in Oak Ridge, TN. This callsign has attracted significant interest in the amateur radio community, with 7 vanity applications filed with the FCC. The most recent was submitted by SOLLMAN, RAYMOND J on Mar 4, 2026. AA4IO has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.- .- ....- .. ---
CW Weight: 26 units(Light (fast to send))
Voice Phonetics
Alpha Alpha Four India Oscar
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 CanceledJul 7, 2021
- Administrative Update AppliedAug 14, 2018
- Administrative Update AppliedAug 1, 2014
- License IssuedJul 8, 2014
- Vanity Callsign GrantedJul 8, 2014
Vanity Application Activity
Competing applications filed with the FCC for this callsign.