AC1O
Active2x1District 1
Competitive callsign — 7 applications filed with the FCC.
License HolderPIRIS, ADRIAN
License ClassAmateur Extra
Min. Class RequiredAmateur Extra
LocationSPRINGFIELD, MA
Grant DateJul 26, 2022
Expiration DateJul 26, 2032
AC1O is a highly sought-after 2x1 format amateur radio callsign. The license is currently held by PIRIS, ADRIAN in SPRINGFIELD, MA. 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 PIRIS, ADRIAN on Jul 7, 2022. AC1O has 7 recorded FCC license history events.
CW & Voice Analysis
Morse Code
.- -.-. .---- ---
CW Weight: 34 units(Moderate)
Voice Phonetics
Alpha Charlie One Oscar
Readability: 8.5/10(High readability)
License History
- Administrative Update AppliedJul 23, 2026
- License IssuedJul 26, 2022
- Vanity Callsign GrantedJul 26, 2022
- License ExpiredJun 1, 2022
- License RenewedMar 19, 2010
- Administrative Update AppliedJan 12, 2009
- License IssuedMay 30, 2000
Vanity Application Activity
Competing applications filed with the FCC for this callsign.