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, WIAC0HT HAM
⏳ Not available yet — opens for vanity requests Dec 10, 2027, two years after the license was canceled (Dec 9, 2025).
2x2 call: only Amateur Extra licensees can request it.
No pending applications list it.
📬 QSL: LoTW user · last upload Jan 5, 2025 · not eQSL AG · QRZ · HamQTH
Not currently held · 1 holder on record
Previous holder: Donald E Gritzmacher
Held AC0HT Apr 18, 2007 → Dec 9, 2025 · first licensed Feb 16, 2007 as KC0ZNU · 3 licenses · FRN 0016116600
-
- Licensee
- Donald E Gritzmacher
- Address
- 13056 Birch Dr
Thornton, CO 80241
- FRN
- 0016116600
- Previous call
- AC0HT (Technician)
- Last granted
- Dec 9, 2025
- Effective
- Dec 9, 2025
- Last action
- Dec 9, 2025
FCC actions (2)
- Dec 9, 2025 — Vanity call sign granted VANGRT
- Dec 9, 2025 — License issued LIISS
-
- Licensee
- Donald E Gritzmacher
- Address
- 13056 Birch Dr
Thornton, CO 80241
- FRN
- 0016116600
- Previous call
- KC0ZNU (Technician)
- Last granted
- Jan 28, 2017
- Effective
- Jan 28, 2017
- Last action
- Dec 9, 2025
FCC actions (4)
- Dec 9, 2025 — License canceled LICAN
- Jan 28, 2017 — License renewed LIREN
- Apr 18, 2007 — Systematic call sign granted SYSGRT
- Apr 18, 2007 — License issued LIISS
-
- Licensee
- Donald E Gritzmacher
- Address
- 13056 Birch Dr
Thornton, CO 80241
- FRN
- 0016116600
- Last granted
- Feb 16, 2007
- Effective
- Apr 18, 2007
- Last action
- Apr 18, 2007
FCC actions (3)
- Apr 18, 2007 — License canceled LICAN
- Feb 16, 2007 — License issued LIISS
- Feb 16, 2007 — 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 May 27, 2010 → Oct 4, 2026 · 96 snapshots · as KC0ZNU
Donald E Gritzmacher
13056 Birch Dr, Thornton, CO 80241
📡 On the air: APRS, digital & WSPR spots
No APRS positions, PSK Reporter reports or WSPR spots for AC0HT in the last 24 hours. They show up here within seconds of AC0HT beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.