K7ZIO
Available1x3District 7
Competitive callsign — 1 application filed with the FCC.
License HolderSywassink, Donald L
License ClassAdvanced
Min. Class RequiredGeneral
LocationSIERRA VISTA, AZ
Grant DateAug 5, 2014
Expiration DateOct 14, 2024
Cancellation DateOct 16, 2026
Available for ApplicationsOct 15, 2026
K7ZIO is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Sywassink, Donald L in SIERRA VISTA, AZ. 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 Ross, Jeromy on Jun 30, 2026. K7ZIO has 4 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- --... --.. .. ---
CW Weight: 35 units(Moderate)
Voice Phonetics
Kilo Seven Zulu India 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 ExpiredOct 16, 2026
- License RenewedAug 5, 2014
- Tax ID (TIN) AddedAug 2, 2004
- License RenewedAug 2, 2004
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Ross, JeromyFiled Jun 30, 2026Not awardedFCC ↗