N9TPB FCC License Search
🕒 FCC license data updated yesterday 7:15 am CDT (FCC files through Oct 4, 2026) · 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

AI4PX HAM

Amateur Extra class licensed since 2001 (25 yrs) AI4PX since 2006 · previously KD4RDB Dalzell, SC grid EM94td 69 repeaters within 50 mi
🔒 Not available — currently licensed, through Jul 21, 2032. If it isn't renewed, it opens for vanity requests Jul 22, 2034.

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

Currently held by JAMES W JOHNSTON III · 1 holder on record

Current holder: JAMES W JOHNSTON III

Held AI4PX May 26, 2006 → present · first licensed Apr 3, 2001 as KD4RDB · 2 licenses · FRN 0004423133

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

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for AI4PX in the last 24 hours. They show up here within seconds of AI4PX beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.

Repeaters within 50 miles

69 repeaters within 50 miles of this address, closest 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
12.3 W4GL Wedgefield
W4GL
 145.4300 -0.6 TSQL 156.7 FM (analog) — Wedgefield, SC
13.7 W4GL Sumter
W4GL
 441.9500 +5 none D-STAR — Sumter, SC
14.9 WR4SC Sumter
WR4SC
 147.0150 +0.6 TSQL 156.7 FM (analog) 🗓 2 nets 2 nets · 207 check-ins · 97 stations Sumter, SC
14.9 W4GL Sumter Tuomey
W4GL
 146.6400 -0.6 TONE 156.7 FM (analog) — Sumter, SC
14.9 W4GL Sumter WRJA
W4GL
 444.1500 +5 TSQL 123.0 FM (analog) (FM,DV) — Sumter, SC
16.7 W4FTK Sumter
W4FTK AllStar
 443.3000 +5 DCS 315 FM (analog) AllStar 40040 EchoLink 367365 🗓 2 nets 2 nets · 540 check-ins · 248 stations Sumter, SC
17.6 no call listed Florence
AllStar
 29.6000 simplex CC0 DMR AllStar 29419 EchoLink 41809 AllStar 49643 — Florence, SC
17.6 KA3KDL Hartsville
KA3KDL AllStar
 146.6250 -0.6 TSQL 114.8 FM (analog) AllStar 29419 EchoLink 41809 — Hartsville, SC
18.3 W4GL Sumter
W4GL
 147.0150 +0.6 TSQL 156.7 FM (analog) — Sumter, SC
18.3 WR4SC Sumter
WR4SC NC-PRN
 442.3125 +5 CC1 DMR NC-PRN 🗓 2 nets 2 nets · 207 check-ins · 97 stations Sumter, SC
19.8 KI4RAX Lugoff
KI4RAX
 146.8200 -0.6 TSQL 91.5 FM (analog) (FM,C4FM) — Lugoff, SC
19.8 KI4RAX Lugoff
KI4RAX
 441.8000 +5 none D-STAR (DV,DMR) — Lugoff, SC
20.5 W4ULH Hartsville Carol
W4ULH
 442.3500 +5 TONE 162.2 FM (analog) — Hartsville, SC
21.9 W4FTK Wedgefield
W4FTK AllStar
 147.0600 +0.6 DCS 315 FM (analog) AllStar 40040 EchoLink 367365 🗓 2 nets 2 nets · 540 check-ins · 248 stations Wedgefield, SC
25.8 KI4IVP Elgin
KI4IVP WIRES-X
 147.2400 +0.6 TSQL 103.5 FM (analog) (FM,C4FM) WIRES-X 18449 — Elgin, SC
26.8 KQ4MKW Darlington S Ca
KQ4MKW BM
 445.5125 -5 CC1 DMR BrandMeister 321045702 — Darlington, South Ca, SC
27.0 WD4KFD Florence I-95/Rt
WD4KFD
 442.5250 +5 TONE 210.7 FM (analog) — Florence, SC
27.9 W4CAE Fort Jackson
W4CAE
 146.7750 -0.6 TSQL 156.7 FM (analog) 🗓 2 nets 2 nets · 93 check-ins · 43 stations Fort Jackson, SC
29.0 KQ4MVG Timmonsville
KQ4MVG
 147.3150 +0.6 TSQL 77.0 FM (analog) — Timmonsville, SC
31.7 KB4RRC Florence
KB4RRC
 147.2550 +0.6 TSQL 162.2 FM (analog) — Florence, SC
31.7 KB4RRC Darlington FDTC
KB4RRC
 444.8000 +5 TSQL 91.5 FM (analog) — Darlington, SC
31.9 KJ4OEF Darlington
KJ4OEF
 444.6000 +5 TONE 162.2 FM (analog) — Darlington, SC
32.0 W4APE Florence
W4APE EchoLink
 147.1950 +0.6 TONE 123.0 FM (analog) EchoLink 779467 — Florence, SC
32.1 KM4ABW Manning Hosp
KM4ABW
 145.1500 -0.6 TSQL 91.5 FM (analog) — Manning, SC
32.2 KJ4BWK Columbia
KJ4BWK
 442.2000 +5 none D-STAR — Columbia, SC
32.2 KJ4BWK Columbia
KJ4BWK
 1282.2250 +12 none D-STAR — Columbia, SC
32.3 WX4ARC Florence
WX4ARC TGIF
 442.2875 +5 CC1 DMR TGIF — Florence, SC
33.3 WR4SC Columbia
WR4SC NC-PRN
 442.5125 +5 CC1 DMR NC-PRN 🗓 2 nets 2 nets · 207 check-ins · 97 stations Columbia, SC
33.3 WR4SC Columbia
WR4SC
 441.7250 +5 TONE 91.5 FM (analog) 🗓 2 nets 2 nets · 207 check-ins · 97 stations Columbia, SC
33.8 KB4RRC Florence City
KB4RRC
 146.9700 -0.6 TONE 167.9 FM (analog) — Florence, SC
34.3 KJ4OEF Florence MRM Ctr
KJ4OEF
 444.8500 +5 TSQL 162.2 FM (analog) — Florence, SC
34.4 W4ULH Florence MUSC
W4ULH
 444.0000 +5 TONE 123.0 FM (analog) — Florence, SC
35.8 W4FTK Blythewood
W4FTK AllStar
 443.6500 +5 DCS 315 FM (analog) AllStar 40040 EchoLink 367365 🗓 2 nets 2 nets · 540 check-ins · 248 stations Blythewood, SC
36.4 WR4SC Florence
WR4SC
 146.6850 -0.6 TSQL 91.5 FM (analog) 🗓 2 nets 2 nets · 207 check-ins · 97 stations Florence, SC
36.4 W4ULH Florence WJPM
W4ULH
 146.8500 -0.6 TSQL 123.0 FM (analog) — Florence, SC
36.4 W4APE Florence
W4APE EchoLink
 442.0500 +5 TONE 123.0 FM (analog) EchoLink 779467 — Florence, SC
36.4 WR4SC Florence
WR4SC NC-PRN
 442.1625 +5 CC1 DMR NC-PRN 🗓 2 nets 2 nets · 207 check-ins · 97 stations Florence, SC
38.4 N7GZT Saint Hemlock rd
N7GZT AllStar
 442.7750 +5 TSQL 156.7 FM (analog) AllStar 637120 — Saint Matthews, SC
38.9 WR4SC Lake City
WR4SC NC-PRN
 440.6375 +5 CC1 DMR NC-PRN 🗓 2 nets 2 nets · 207 check-ins · 97 stations Lake City, SC
40.0 W4FTK Columbia
W4FTK AllStar
 442.8750 +5 DCS 315 FM (analog) AllStar 40040 EchoLink 367365 🗓 2 nets 2 nets · 540 check-ins · 248 stations Columbia, SC
40.0 W4CAE Columbia
W4CAE AllStar
 147.3300 +0.6 TSQL 156.7 FM (analog) AllStar 494460 🗓 2 nets 2 nets · 93 check-ins · 43 stations Columbia, SC
40.0 K4HI Columbia
K4HI WIRES-X
 147.3600 +0.6 TSQL 100.0 FM (analog) WIRES-X 64927 — Columbia, SC
40.0 WR4SC Columbia Capital
WR4SC NC-PRN
 440.6125 +5 CC1 DMR NC-PRN 🗓 2 nets 2 nets · 207 check-ins · 97 stations Columbia, SC
40.0 K9OH Columbia
K9OH AllStar
 444.8750 +5 TSQL 91.5 FM (analog) AllStar 417861 — Columbia, SC
40.6 AD4U Saint Matthews
AD4U
 146.6700 -0.6 TSQL 156.7 FM (analog) — Saint Matthews, SC
40.6 N7GZT Saint Matthews
N7GZT
 53.2100 -1 none FM (analog) — Saint Matthews, SC
40.8 KJ4BWK Saint Matthews
KJ4BWK
 145.4000 -0.6 none D-STAR — Saint Matthews, SC
41.3 W4EAE Cayce
W4EAE
 433.1000 +5 CC1 DMR — Cayce, SC
41.3 W4EAE Cayce
W4EAE
 443.1000 +5 none D-STAR (DMR,DV) — Cayce, SC
42.4 W4APE Pageland
W4APE EchoLink
 146.8950 -0.6 TONE 123.0 FM (analog) EchoLink 779467 — Pageland, SC
43.3 W4DZF Columbia St
W4DZF
 145.2700 -0.6 DCS 632 FM (analog) — Columbia, SC
43.7 W4APE Greeleyville
W4APE EchoLink
 145.2300 -0.6 TONE 123.0 FM (analog) EchoLink 779467 — Greeleyville, SC
44.1 W4FTK Pageland
W4FTK AllStar
 441.8250 +5 DCS 315 FM (analog) AllStar 40040 EchoLink 367365 🗓 2 nets 2 nets · 540 check-ins · 248 stations Pageland, SC
45.5 KC4IRA Lancaster Medica
KC4IRA AllStar
 444.6250 +5 Fusion (C4FM) AllStar 565231 — Lancaster, SC
46.2 WR4SC Cheraw
WR4SC NC-PRN
 440.5375 +5 CC1 DMR NC-PRN 🗓 2 nets 2 nets · 207 check-ins · 97 stations Cheraw, SC
46.5 W4APE Greeleyville
W4APE
 444.7500 +5 TSQL 123.0 FM (analog) — Greeleyville, SC
46.8 W4PAX Lancaster
W4PAX
 146.7000 -0.6 TSQL 123.0 FM (analog) — Lancaster, SC
46.8 W4PAX Lancaster
W4PAX
 444.1000 +5 TONE 192.8 FM (analog) — Lancaster, SC
48.7 KJ4QLH Vance
KJ4QLH
 146.8050 -0.6 TSQL 156.7 FM (analog) — Vance, SC
49.1 WR4SC Orangeburg
WR4SC
 146.8800 -0.6 TSQL 123.0 FM (analog) 🗓 2 nets 2 nets · 207 check-ins · 97 stations Orangeburg, SC
49.1 WR4SC Orangeburg
WR4SC NC-PRN
 440.5875 +5 CC1 DMR NC-PRN 🗓 2 nets 2 nets · 207 check-ins · 97 stations Orangeburg, SC
49.1 WR4SC Orangeburg
WR4SC
 441.7500 +5 TONE 123.0 FM (analog) 🗓 2 nets 2 nets · 207 check-ins · 97 stations Orangeburg, SC
49.1 KJ4QLH Orangeburg /Calh
KJ4QLH
 147.3900 +0.6 TSQL 156.7 FM (analog) — Orangeburg, SC
10.8 W4APE offline Lucknow
W4APE EchoLink
 146.9250 -0.6 TONE 123.0 FM (analog) EchoLink 779467 — Lucknow, SC
40.0 N4EOY offline Columbia
N4EOY
 224.9000 -1.6 none FM (analog) — Columbia, SC
42.4 W4JMY offline Pageland
W4JMY
 53.3700 -1 TONE 100.0 FM (analog) — Pageland, SC
42.8 W4EAE offline Cayce
W4EAE IRLP
 147.5100 simplex TSQL 131.8 FM (analog) IRLP 8255 — Cayce, SC
44.4 NE4SC offline Kingstree
NE4SC
 145.3100 -0.6 TONE 123.0 FM (analog) — Kingstree, SC
49.2 KG4GKY offline West Columbia
KG4GKY IRLP
 446.8750 simplex TSQL 79.7 FM (analog) IRLP 4045 — West Columbia, SC