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/KM4YYZ

← Back to results

KM4YYZ

Active2x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderFOSTER, MARK C

License ClassGeneral

Min. Class RequiredTechnician

LocationBEVERLY, MA

Grant DateNov 15, 2016

Expiration DateNov 15, 2026

KM4YYZ is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by FOSTER, MARK C in BEVERLY, MA. 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 Deiter, Stephon K on Apr 2, 2018. KM4YYZ has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 48 units(Heavy (slower to send))

Voice Phonetics

Kilo Mike Four Yankee Yankee Zulu

Readability: 8/10(High readability)

License History

License ModifiedFeb 15, 2017
License ModifiedJan 13, 2017
System-Generated GrantNov 15, 2016
License IssuedNov 15, 2016

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Deiter, Stephon KFiled Apr 2, 2018
Not awardedFCC ↗

Search external databases

QRZ ↗HamQTH ↗

Explore nearby callsigns

← KM4YYY KM4YZA →

FCC data as of Sep 12, 2026

KM4YYZ FCC Vanity Status: 1 Competing Application & History