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N4DUF

Active1x3District 4

Competitive callsign — 1 application filed with the FCC.

License HolderMcDuff, William M

License ClassGeneral

Min. Class RequiredGeneral

LocationColora, MD

Grant DateMay 4, 2021

Expiration DateMay 4, 2031

N4DUF is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by McDuff, William M in Colora, MD. 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 McDuff, William M on Apr 14, 2021. N4DUF has 5 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 27 units(Light (fast to send))

Voice Phonetics

November Four Delta Uniform Foxtrot

Readability: 7/10(Good readability)

License History

License IssuedMay 4, 2021
Vanity Callsign GrantedMay 4, 2021
License ExpiredFeb 12, 2019
Tax ID (TIN) AddedNov 21, 2006
License RenewedNov 21, 2006

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

McDuff, William MFiled Apr 14, 2021
Not awardedFCC ↗

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FCC data as of Sep 4, 2026

N4DUF FCC Vanity Status: 1 Competing Application & History