N9TPB FCC License Search

🕒 FCC license data updated yesterday 9:45 am CDT · 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

KF4REX HAM

✅ Available for a vanity request — free since Apr 27, 2009.

2x3 call: any licensee can request it. 1 pending application already lists it (first filed Sep 30, 2026) — see requests.

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

Not currently held · 1 holder on record · available since Apr 27, 2009

Previous holder: RENE F CASTALLANOS

Held KF4REX Apr 26, 1997 → Apr 26, 2007 · first licensed Apr 26, 1997 as KF4REX · 1 license · no FRN on file (pre-2001 records)

KF4REX Expired Technician Apr 26, 1997 → Apr 26, 2007 (expired)

Licensee
RENE F CASTALLANOS

Address
5520 N HAVERHILL RD APT 9
WEST PALM BEACH, FL 33407
26.7577, -80.0912 (ZIP center) · Grid EL96ws · CQ 5 · ITU 8 · map ↗

Last granted
Apr 26, 1997

Effective
Apr 26, 1997

Last action
Apr 28, 2009
FCC actions (1)
- Apr 28, 2009 — License expired LIEXP

Address history

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

Seen Nov 7, 2004 → Oct 4, 2026 · 48 snapshots · as KF4REX
RENE F CASTALLANOS
5520 N HAVERHILL RD APT 9, WEST PALM BEACH, FL 33407
26.7577, -80.0912 (ZIP center) · Grid EL96ws · CQ 5 · ITU 8 · map ↗

Others requesting KF4REX

1 application listed KF4REX as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
Sep 30, 2026	Oct 18, 2026 (on or after)	KJ4QT · REX A DUDLEY · WEAVERVILLE, NC	4	Pending

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for KF4REX in the last 24 hours. They show up here within seconds of KF4REX beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.