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/AC4ZS

← Back to results

AC4ZS

Available2x2Zone 4

License HolderIRELAND SR, RICHARD M

License ClassAmateur Extra

Min. Class RequiredGeneral

Grant DateOct 29, 2002

Expiration DateJan 26, 2013

Cancellation DateJan 27, 2015

Available for ApplicationsJan 27, 2015

This callsign is available now

Requires General license or higher to apply for this callsign format (2x2).

License History

License ExpiredJan 27, 2015
Tax ID (TIN) AddedOct 29, 2002
License RenewedOct 29, 2002

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

← AC4ZR AC4ZT →

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

AC4ZS — CallsignFinder.com