AI0A
Active2x1District 0
Competitive callsign — 9 applications filed with the FCC.
License HolderTolsdorf, David K
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationOgden, IA
Grant DateJan 22, 2026
Expiration DateFeb 13, 2036
AI0A is a highly sought-after 2x1 format amateur radio callsign. The license is currently held by Tolsdorf, David K in Ogden, IA. This callsign has attracted significant interest in the amateur radio community, with 9 vanity applications filed with the FCC. The most recent was submitted by HARRIS, CHARLES E on Feb 18, 2016. AI0A has 6 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.- .. ----- .-
CW Weight: 25 units(Light (fast to send))
Voice Phonetics
Alpha India Zero Alpha
Readability: 7.5/10(High readability)
License History
- License RenewedJan 22, 2026
- License IssuedFeb 13, 2016
- Vanity Callsign GrantedFeb 13, 2016
- License ExpiredJan 26, 2016
- Tax ID (TIN) AddedNov 3, 2003
- License RenewedNov 3, 2003
Vanity Application Activity
Competing applications filed with the FCC for this callsign.