W3ISO
Available1x3District 3
Competitive callsign — 1 application filed with the FCC.
License HolderRule, Brian R
License ClassAmateur Extra
Min. Class RequiredGeneral
LocationCincinnati, OH
Grant DateMar 29, 2007
Expiration DateMar 29, 2017
Cancellation DateMar 30, 2019
Available for ApplicationsMar 30, 2019
W3ISO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Rule, Brian R in Cincinnati, OH. 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 Vadlamani, Prasanna Nikhil Sath on Sep 22, 2025. W3ISO has 3 recorded FCC license history events.
CW & Voice Analysis
Morse Code
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CW Weight: 30 units(Light (fast to send))
Voice Phonetics
Whiskey Three India Sierra Oscar
Readability: 7/10(Good readability)
This callsign is available now
Requires General license or higher to apply for this callsign format (1x3).
License History
- License ExpiredMar 30, 2019
- License RenewedMar 29, 2007
- FRN Association Letter SentMar 29, 2007
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Vadlamani, Prasanna Nikhil SathFiled Sep 22, 2025Not awardedFCC ↗