N9TPB FCC License Search
🕒 FCC license data updated yesterday 7:15 am CDT (FCC files through Oct 6, 2026) · next update today 7:15 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 · old CB calls like KHC1939 or 18Q3518 (1962–63 CB call books) · (205) 546-1767 (1990s CB directory phones)

KR4O HAM

Amateur Extra class licensed since 1986 (40 yrs) Pocahontas, IA Grid EN22pr 23 repeaters within 50 mi
🔒 Not available — currently licensed, through Aug 22, 2026. If it isn't renewed, it opens for vanity requests Aug 23, 2028.

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

Currently held by ERIC J SORENSEN · 1 holder on record

Current holder: ERIC J SORENSEN

Held KR4O Jul 22, 1986 → present · first licensed Jul 22, 1986 as KR4O · 1 license · FRN 0015126089
📖 In the printed callbooks since 1979 as WB3KDF, before the FCC's online records

Callbook Records, 1993–2003
From the FCC amateur database as published on the QRZ! callsign CD-ROMs, 1993–2003, before and alongside the FCC's online records (which start in 1999). "Seen" dates are the first and last disc showing that record; the issue date is the FCC's, so it can be a renewal of an even older license.
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
KR4O in the Printed Callbooks, 1909–1997
From scanned copies of the printed callbooks (government lists from 1913, then the Radio Amateur Callbook to 1997), read by OCR, so names and streets can carry typos. Each line is one or more editions in a row showing the same name at the same address.

Others Requesting KR4O

1 application listed KR4O as a choice, newest first.

FiledAwardApplicantChoice #KR4OResult
Sep 9, 2016 Sep 27, 2016 KM4TOW · CURTIS H PAYNE · CORDOVA, TN 25Dismissed Application dismissed

📡 On the Air: APRS, Digital & WSPR Spots

No APRS positions, PSK Reporter reports or WSPR spots for KR4O in the last 24 hours. They show up here within seconds of KR4O beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.

Repeaters within 50 Miles

23 repeaters within 50 miles of this address, most active first · sort: closest · most active · map these & export for a radio →

● confirmed on the air · ● probably · ● reported off the air · ● unknown · ◉ this license · ring = 50 miles · click a dot for the repeater's page
● confirmed on the air · ● probably · ● reported off the air · no dot = unknown (hover a dot for the evidence)
MilesCallNameOutputOffsetToneModeNetworksActivityLocation
23.2 K0HU Humboldt
K0HU BM
 145.5000 -0.6 CC3 DMR BrandMeister 311911 — Humboldt, IA
23.7 K0HU Humboldt
K0HU DCI
 147.1800 +0.6 CC1 DMR DCI — Humboldt, IA
23.7 K0HU Humboldt
K0HU BM
 442.4000 +5 CC3 DMR BrandMeister 311918 — Humboldt, IA
23.7 K0HU Humboldt
K0HU MARC
 147.3900 +0.6 CC4 DMR DMR-MARC — Humboldt, IA
26.5 KG0CK Gillett Grove
KG0CK BM
 444.7000 +5 TONE 110.9 FM (analog) (DMR,FM) BrandMeister 310147 — Gillett Grove, IA
26.9 WB0FNA Storm Lake
WB0FNA BM
 444.5250 +5 CC1 DMR BrandMeister 310132 — Storm Lake, IA
27.0 KE0EJS Storm Lake W Wtr
KE0EJS AllStar
 146.7750 -0.6 TSQL 110.9 FM (analog) (FM,P25) AllStar 582272 EchoLink 379502 EchoLink 548437 — Storm Lake, IA
27.8 K0FBP Rockwell City
K0FBP EchoLink
 145.4900 -0.6 TSQL 110.9 FM (analog) (FM,C4FM) EchoLink 302449 — Rockwell City, IA
27.8 K0FBP Rockwell City
K0FBP EchoLink
 443.6250 +5 TSQL 110.9 FM (analog) (FM,C4FM) EchoLink 302449 — Rockwell City, IA
30.8 K0RJV Fort Dodge
K0RJV
 146.6850 -0.6 TONE 110.9 FM (analog) — Fort Dodge, IA
31.2 WB0FNA Storm Lake
WB0FNA
 444.7500 +5 TONE 110.9 FM (analog) (FM,P25) — Storm Lake, IA
32.5 KC0MWG Algona
KC0MWG
 147.2100 +0.6 TSQL 110.9 FM (analog) — Algona, IA
32.8 K0HU Algona
K0HU BM
 444.8250 +5 CC2 DMR BrandMeister 311912 — Algona, IA
33.5 KC0MWG Algona
KC0MWG BM
 444.8250 +5 TONE 110.9 FM (analog) (DMR,FM) BrandMeister 3119146 — Algona, IA
34.6 K0HU Otho
K0HU yes
 443.5750 +5 CC5 DMR yes — Otho, IA
36.4 KG0CK Spencer
KG0CK BM
 146.8200 -0.6 CC1 DMR BrandMeister 311927 — Spencer, IA
41.1 N0NAF Breda
N0NAF
 147.2850 +0.6 TONE 110.9 FM (analog) — Breda, IA
47.2 KF0PDS Carroll
KF0PDS BM
 438.2000 +0.6 CC1 DMR BrandMeister 320602001 — Carroll, IA
47.6 K0KWO Webster City
K0KWO
 147.0150 +0.6 TONE 103.5 FM (analog) (FM,C4FM) — Webster City, IA
47.6 N0PSF Webster City
N0PSF
 146.9100 -0.6 none FM (analog) — Webster City, IA
48.6 N0CXX Offline Cedar Rapids
N0CXX
 147.4050 in 146.4150 none D-STAR — Cedar Rapids, IA
48.6 N0CXX Offline Cedar Rapids
N0CXX
 442.0500 +5 none D-STAR — Cedar Rapids, IA
49.9 N0VPR Scranton
N0VPR BM
 444.3000 +5 CC1 DMR BrandMeister — Scranton, IA