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/N4SPD

← Back to results

N4SPD

Active1x3District 4

Competitive callsign — 3 applications filed with the FCC.

License HolderAlvarez, Rafael R

License ClassAmateur Extra

Min. Class RequiredGeneral

LocationHouston, TX

Grant DateMar 13, 2021

Expiration DateMar 13, 2031

N4SPD is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by Alvarez, Rafael R in Houston, TX. This callsign has attracted significant interest in the amateur radio community, with 3 vanity applications filed with the FCC. The most recent was submitted by Alvarez, Rafael R on Feb 23, 2021. N4SPD has 5 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

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

Voice Phonetics

November Four Sierra Papa Delta

Readability: 7/10(Good readability)

License History

License IssuedMar 13, 2021
Vanity Callsign GrantedMar 13, 2021
License ExpiredJan 7, 2020
Tax ID (TIN) AddedOct 29, 2007
License RenewedOct 29, 2007

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Alvarez, Rafael RFiled Feb 23, 2021
Not awardedFCC ↗
Lewis Jr, Edward WFiled Dec 26, 2000
Not awardedFCC ↗
MOUNT, SPUDFiled Dec 26, 2000
Not awardedFCC ↗

Search external databases

QRZ ↗HamQTH ↗

Explore nearby callsigns

← N4SPC N4SPE →

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

N4SPD FCC Vanity Status: 3 Competing Applications & History