N9TPB FCC License Search

🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 4, 2026) · next update tomorrow 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

AD0SC HAM

✅ Available for a vanity request — free since Apr 13, 2026.

2x2 call: only Amateur Extra licensees can request it. No pending applications list it.

📬 QSL: no LoTW uploads on record · not eQSL AG · QRZ · HamQTH

Not currently held · 1 holder on record · available since Apr 13, 2026

Previous holder: Clifford L Siebert

Held AD0SC Apr 12, 2014 → Apr 12, 2024 · first licensed Feb 14, 2014 as KD0ZDH · 2 licenses · FRN 0023359599

AD0SC Expired Amateur Extra · vanity Apr 12, 2014 → Apr 12, 2024 (expired)

Licensee
Clifford L Siebert

Address
1252 Sadie Ln
Fenton, MO 63026
38.5027, -90.4589 (ZIP center) · Grid EM48sm · CQ 4 · ITU 7 · map ↗

FRN
0023359599

Previous call
KD0ZDH (General)

Last granted
Apr 12, 2014

Effective
Apr 12, 2014

Last action
Apr 14, 2026
FCC actions (3)
- Apr 14, 2026 — License expired LIEXP
- Apr 12, 2014 — Vanity call sign granted VANGRT
- Apr 12, 2014 — License issued LIISS
KD0ZDH Canceled Amateur Extra Feb 14, 2014 → Apr 12, 2014 (canceled)

Licensee
Clifford L Siebert

Address
1252 Sadie Ln
Fenton, MO 63026
38.5027, -90.4589 (ZIP center) · Grid EM48sm · CQ 4 · ITU 7 · map ↗

FRN
0023359599

Last granted
Feb 14, 2014

Effective
Mar 19, 2014

Last action
Apr 12, 2014
FCC actions (5)
- Apr 12, 2014 — License canceled LICAN
- Mar 19, 2014 — License modified LIMOD
- Mar 3, 2014 — License modified LIMOD
- Feb 14, 2014 — License issued LIISS
- Feb 14, 2014 — Systematic call sign granted SYSGRT

Address history

From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.

Seen Mar 28, 2014 → Oct 4, 2026 · 75 snapshots · as KD0ZDH
Clifford L Siebert
1252 Sadie Ln, Fenton, MO 63026
38.5027, -90.4589 (ZIP center) · Grid EM48sm · CQ 4 · ITU 7 · map ↗

Others requesting AD0SC

1 application listed AD0SC as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
Mar 25, 2014	Apr 12, 2014	KD0ZDH · Clifford L Siebert · Fenton, MO	1	Granted

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for AD0SC in the last 24 hours. They show up here within seconds of AD0SC beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.