CFCallsignFinder

Search Watchlist

Track FCC amateur radio vanity callsign availability. Data updated daily.

Legal & Info

Pricing FAQ Terms of Service Privacy Policy

© 2026 CallsignFinder. All rights reserved.

FCC data sourced from FCC Universal Licensing System. Not affiliated with the FCC.

Watchlist Search Account

Home/Search/KB4TDX

← Back to results

KB4TDX

Available2x3Zone 4

License HolderSadza, Nicholas

License ClassGeneral

Min. Class RequiredTechnician

Grant DateDec 1, 2010

Expiration DateFeb 26, 2021

Cancellation DateFeb 28, 2023

Available for ApplicationsFeb 27, 2023

This callsign is available now

Requires Technician license or higher to apply for this callsign format (2x3).

License History

License ExpiredFeb 28, 2023
License RenewedDec 1, 2010
License ModifiedAug 26, 2005
License RenewedFeb 26, 2001

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

No competing applications detected. Monitor the FCC ULS application search to verify before filing.

Explore nearby callsigns

← KB4TDW KB4TDY →

FCC data as of Jun 12, 2026 — may be delayed

KB4TDX — CallsignFinder.com