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/W1SDN

← Back to results

W1SDN

Active1x3District 1

Competitive callsign — 2 applications filed with the FCC.

License HolderDonovan, Sean P

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationWashington, DC

Grant DateSep 3, 2025

Expiration DateNov 17, 2035

W1SDN is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Donovan, Sean P in Washington, DC. 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 Byrnes, Joseph M on Apr 16, 2019. W1SDN has 6 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 32 units(Moderate)

Voice Phonetics

Whiskey One Sierra Delta November

Readability: 7/10(Good readability)

License History

License RenewedSep 3, 2025
Administrative Update AppliedMay 21, 2019
Administrative Update AppliedAug 26, 2017
License IssuedNov 17, 2015
Vanity Callsign GrantedNov 17, 2015
License ExpiredDec 10, 2009

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Byrnes, Joseph MFiled Apr 16, 2019
DismissedFCC ↗
Donovan, Sean PFiled Oct 28, 2015
Not awardedFCC ↗

Search external databases

QRZ ↗HamQTH ↗

Explore nearby callsigns

← W1SDM W1SDR →

FCC data as of Sep 4, 2026

W1SDN FCC Vanity Status: 2 Competing Applications & History