🕒 FCC license data updated today 9:42 am CDT (FCC files through Sep 30, 2026) · next update tomorrow 9:15 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
KB4MK
✅
Available for a vanity request — free since Sep 18, 2025.
2x2 call: Advanced and Amateur Extra licensees can request it.
No pending applications list it.
Not currently held
· 3 holders on record
· available since Sep 18, 2025
Previous holder: MARTIN F KLINGER
Held KB4MK Sep 17, 2013 → Sep 17, 2023
· first licensed May 30, 2006 as WB4SXD
· 2 licenses · FRN 0015108194
KB4MK
Expired
Advanced · vanity
Sep 17, 2013 → Sep 17, 2023 (expired)
Licensee MARTIN F KLINGER
Address 10758 S TROPICAL TRAIL MERRITT ISLAND, FL 32952
28.3204, -80.6592 (ZIP center) · Grid
EL98qh · CQ 5 · ITU 8 ·
map ↗
FRN 0015108194
Previous call WB4SXD
Last granted Sep 17, 2013
Effective Sep 17, 2013
Last action Sep 18, 2025
FCC actions (3)
Sep 18, 2025 — License expired LIEXP Sep 17, 2013 — Vanity call sign granted VANGRT Sep 17, 2013 — License issued LIISS
WB4SXD
Canceled
Advanced
May 30, 2006 → Sep 17, 2013 (canceled)
Licensee MARTIN F KLINGER
Address 10758 S TROPICAL TRAIL MERRITT ISLAND, FL 32952
28.3204, -80.6592 (ZIP center) · Grid
EL98qh · CQ 5 · ITU 8 ·
map ↗
FRN 0015108194
Last granted May 30, 2006
Effective Nov 6, 2008
Last action Sep 17, 2013
FCC actions (3)
Sep 17, 2013 — License canceled LICAN May 30, 2006 — License renewed LIREN May 30, 2006 — FCC action LITIN
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
Seen Nov 7, 2004 → Sep 27, 2026 · 85 snapshots · as WB4SXD
MARTIN F KLINGER
10758 S TROPICAL TRAIL, MERRITT ISLAND, FL 32952
28.3204, -80.6592 (ZIP center) · Grid
EL98qh · CQ 5 · ITU 8 ·
map ↗
Previous holder: Michael A Kelly
Held KB4MK Nov 10, 2006 → Apr 27, 2010
· first licensed as KF5PX
· 5 licenses · FRN 0002448595
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
Seen May 27, 2010 → Sep 27, 2026 · 89 snapshots · as N4MAK
Michael A Kelly
Attn: Michael Kelly 2529 Ostrich Ln, Winterville, NC 28590
35.5453, -77.4516 (street) · Grid
FM15gn · CQ 5 · ITU 8 ·
map ↗
Seen Nov 7, 2004 → Sep 27, 2026 · 47 snapshots · as KF5PX
MICHAEL A KELLY
Seen Nov 7, 2004 → Sep 27, 2026 · 93 snapshots · as K5AWI
Michael A Kelly
Attn: Michael Kelly PO Box 1878 2529 Ostrich Ln, Winterville, NC 28590
35.5453, -77.4516 (street) · Grid
FM15gn · CQ 5 · ITU 8 ·
map ↗
Previous holder: BOYCE A CLODFELTER
Held KB4MK Jun 16, 1992 → Jun 16, 2002
· first licensed Jun 16, 1992 as KB4MK
· 1 license · no FRN on file (pre-2001 records)
KB4MK
Expired
Advanced
Jun 16, 1992 → Jun 16, 2002 (expired)
Licensee BOYCE A CLODFELTER
Address RT 4 BOX 55 FOREST, VA 24551
37.3701, -79.3314 (ZIP center) · Grid
FM07ii · CQ 5 · ITU 8 ·
map ↗
Last granted Jun 16, 1992
Effective Jun 16, 1992
Last action Jun 17, 2004
FCC actions (1)
Jun 17, 2004 — 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 → Sep 27, 2026 · 47 snapshots · as KB4MK
BOYCE A CLODFELTER
RT 4 BOX 55, FOREST, VA 24551
37.3701, -79.3314 (ZIP center) · Grid
FM07ii · CQ 5 · ITU 8 ·
map ↗
Others requesting KB4MK
2 applications listed KB4MK as a choice, newest first.
📡 On the air: APRS, digital & WSPR spots
No APRS positions, PSK Reporter reports or WSPR spots for KB4MK in the last 24 hours. They show up here within seconds of KB4MK beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.
Data: FCC Universal Licensing System, amateur service · refreshed nightly
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