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NT4ZO

Available2x2District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderTHORNTON, JANE M

License ClassTechnician

Min. Class RequiredGeneral

LocationPASO ROBLES, CA

Grant DateOct 5, 1998

Expiration DateOct 5, 2008

Cancellation DateOct 11, 2000

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NT4ZO

Available2x2District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderTHORNTON, JANE M

License ClassTechnician

Min. Class RequiredGeneral

LocationPASO ROBLES, CA

Grant DateOct 5, 1998

Expiration DateOct 5, 2008

Cancellation DateOct 11, 2000

Available for ApplicationsOct 12, 2002

NT4ZO is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by THORNTON, JANE M in PASO ROBLES, CA. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by Higdon, Michael S on Apr 20, 2026. NT4ZO has 1 recorded FCC license history event.

CW & Voice Analysis

Morse Code

-. - ....- --.. ---

CW Weight: 31 units(Moderate)

Voice Phonetics

November Tango Four Zulu 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 CanceledOct 11, 2000

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Higdon, Michael SFiled Apr 20, 2026
Not awardedFCC ↗
Cordaro, Anthony JFiled Nov 25, 2025
DismissedFCC ↗

Search external databases

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FCC data as of Sep 4, 2026

NT4ZO FCC Vanity Status: 2 Competing Applications & History