N9TPB
FCC License Search
🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 5, 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, WIK6SFK HAM
✅ Available for a vanity request — free since Feb 5, 2014.
1x3 call: Technician, General, Advanced and Amateur Extra licensees can request it.
No pending applications list it.
📬 QSL: LoTW user · last upload Feb 9, 2012 · not eQSL AG · QRZ · HamQTH
Not currently held · 1 holder on record · available since Feb 5, 2014
Previous holder: Steve F Koster
Held K6SFK Aug 13, 2010 → Feb 4, 2012 · first licensed Jul 22, 2010 as KJ6JVP · 3 licenses · FRN 0020061214
-
- Licensee
- Steve F Koster
- Address
- PO Box 990
Geyserville, CA 95441
- FRN
- 0020061214
- Previous call
- K6SFK (General)
- Last granted
- Nov 16, 2021
- Effective
- Nov 16, 2021
- Last action
- Nov 16, 2021
FCC actions (5)
- Nov 16, 2021 — License renewed LIREN
- Jul 24, 2013 — License modified LIMOD
- Mar 21, 2012 — Administrative update LIAUA
- Feb 4, 2012 — Vanity call sign granted VANGRT
- Feb 4, 2012 — License issued LIISS
-
- Licensee
- Stephen F Koster
- Address
- PO Box 990
Geyserville, CA 95441
- FRN
- 0020061214
- Previous call
- KJ6JVP (Technician)
- Last granted
- Aug 13, 2010
- Effective
- Aug 24, 2010
- Last action
- Feb 4, 2012
FCC actions (4)
- Feb 4, 2012 — License canceled LICAN
- Aug 24, 2010 — License modified LIMOD
- Aug 13, 2010 — Vanity call sign granted VANGRT
- Aug 13, 2010 — License issued LIISS
-
- Licensee
- Stephen F Koster
- Address
- PO Box 990
Geyserville, CA 95441
- FRN
- 0020061214
- Last granted
- Jul 22, 2010
- Effective
- Jul 22, 2010
- Last action
- Aug 13, 2010
FCC actions (3)
- Aug 13, 2010 — License canceled LICAN
- Jul 22, 2010 — License issued LIISS
- Jul 22, 2010 — Systematic call sign granted SYSGRT
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
Others requesting K6SFK
1 application listed K6SFK as a choice, newest first.
| Filed | Award | Applicant | Choice # | Status |
|---|---|---|---|---|
| Jul 26, 2010 | Aug 13, 2010 | KJ6JVP · Stephen F Koster · Geyserville, CA | 1 | Granted |
📡 On the air: APRS, digital & WSPR spots
No APRS positions, PSK Reporter reports or WSPR spots for K6SFK in the last 24 hours. They show up here within seconds of K6SFK beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.