N9TPB FCC License Search
🕒 FCC license data updated yesterday 6:02 am CDT (FCC files through Oct 16, 2026) · next update today 6:00 am CDT
Ask: HAMs within 5 miles of N9TPB · Extra class operators in Madison, WI · or try N9TPB · K9* wildcards · Smith, John · 0004797601 (FRN) · 53703 · Madison, WI · old CB calls like KHC1939 or 18Q3518 (1962–63 CB call books) · (205) 546-1767 (1990s CB directory phones)

WD4DU HAM

✅ Never issued — WD4DU isn't in the FCC's public license data (which starts in 1999) or the 1993–2003 callbooks, and nothing in it blocks a vanity request. Calls like this are usually granted when requested.
2x2 call: Advanced and Amateur Extra licensees can request it. No pending applications list it.
Last requested Oct 8, 2015 as choice 3: not granted, that applicant got N4DAU instead.
The FCC has no record of WD4DU ever being issued.
WD4DU in the Printed Callbooks, 1909–1997
From scanned copies of the printed callbooks (government lists from 1913, then the Radio Amateur Callbook to 1997), read by OCR, so names and streets can carry typos. Each line is one or more editions in a row showing the same name at the same address.

Others Requesting WD4DU

1 application listed WD4DU as a choice, newest first.

FiledAwardApplicantChoice #WD4DUResult
Oct 8, 2015 Oct 26, 2015 KM4MEQ · Dustin A Underdown · Mc Adenville, NC 3Not granted They got N4DAU (choice 1)