N9TPB
FCC License Search
🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 5, 2026) · next update today 8:30 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, WIKO4CMK HAM
⏳ Not available yet — opens for vanity requests Apr 1, 2028, two years after the license was canceled (Mar 31, 2026).
2x3 call: any licensee can request it.
No pending applications list it.
📬 QSL: LoTW user · last upload Mar 31, 2026 · not eQSL AG · QRZ · HamQTH
Not currently held · 1 holder on record
Previous holder: Robert C Mahoney
Held KO4CMK Mar 10, 2020 → Mar 31, 2026 · first licensed Mar 10, 2020 as KO4CMK · 2 licenses · FRN 0029291812
-
- Licensee
- Robert C Mahoney
- Address
- 937 Rolling Holly Dr
Great Falls, VA 22066
- FRN
- 0029291812
- Previous call
- KO4CMK (General)
- Last granted
- Mar 31, 2026
- Effective
- Mar 31, 2026
- Last action
- Mar 31, 2026
FCC actions (2)
- Mar 31, 2026 — Vanity call sign granted VANGRT
- Mar 31, 2026 — License issued LIISS
-
- Licensee
- Robert C Mahoney
- Address
- 937 Rolling Holly Dr
Great Falls, VA 22066
- FRN
- 0029291812
- Last granted
- Mar 10, 2020
- Effective
- May 31, 2022
- Last action
- Mar 31, 2026
FCC actions (4)
- Mar 31, 2026 — License canceled LICAN
- May 31, 2022 — License modified LIMOD
- Mar 10, 2020 — License issued LIISS
- Mar 10, 2020 — 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 Apr 16, 2022 → Oct 4, 2026 · 15 snapshots · as KO4CMK
Robert C Mahoney
937 Rolling Holly Dr, Great Falls, VA 22066
📡 On the air: APRS, digital & WSPR spots
No APRS positions, PSK Reporter reports or WSPR spots for KO4CMK in the last 24 hours. They show up here within seconds of KO4CMK beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.