N9TPB FCC License Search

🕒 FCC license data updated yesterday 7:15 am CDT (FCC files through Oct 11, 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 · old CB calls like KHC1939 or 18Q3518 (1962–63 CB call books) · (205) 546-1767 (1990s CB directory phones)

KC0CO HAM

Amateur Extra class licensed since 2007 (19 yrs) KC0CO since 2021 · previously AJ6KK, KB3ONC Buena Vista, CO Grid DM68vu LoTW user eQSL AG 33 repeaters within 50 mi

🔒 Not available — currently licensed, through Mar 27, 2031. If it isn't renewed, it opens for vanity requests Mar 28, 2033.

📬 QSL: LoTW user · last upload Jul 17, 2022 · eQSL AG member · QRZ · HamQTH

📝 KC0CO has filed vanity applications before — latest filed Mar 9, 2021 · what was requested

Currently held by CONOR A CALLAHAN · 2 holders on record

Current holder: CONOR A CALLAHAN

Held KC0CO Mar 27, 2021 → present · first licensed Feb 6, 2007 as KB3ONC · 3 licenses · FRN 0016072688

📦 Moved: Denver, CO → Buena Vista, CO

KC0CO Active Amateur Extra · vanity Mar 27, 2021 → expires Mar 27, 2031

Licensee
CONOR A CALLAHAN

Address
16663 Holly Ct
Buena Vista, CO 81211
38.8731, -106.1787 (street) · Grid DM68vu · CQ 4 · ITU 7 · map ↗

FRN
0016072688

Previous call
AJ6KK (Technician)

Last granted
Mar 27, 2021

Effective
Nov 8, 2022

Last action
Nov 8, 2022
FCC actions (3)
- Nov 8, 2022 — Administrative update LIAUA
- Mar 27, 2021 — Vanity call sign granted VANGRT
- Mar 27, 2021 — License issued LIISS
📦 Moved: San Francisco, CA → Denver, CO

AJ6KK Canceled Amateur Extra Oct 24, 2017 → Mar 27, 2021 (canceled)

Licensee
CONOR A CALLAHAN

Address
1286 Raleigh St
Denver, CO 80204
39.7348, -105.0207 (ZIP center) · Grid DM79lr · CQ 4 · ITU 7 · map ↗

FRN
0016072688

Previous call
KB3ONC (Technician)

Last granted
Oct 24, 2017

Effective
Jun 26, 2020

Last action
Mar 27, 2021
FCC actions (4)
- Mar 27, 2021 — License canceled LICAN
- Jun 26, 2020 — Administrative update LIAUA
- Jul 9, 2019 — Systematic call sign granted SYSGRT
- Jul 9, 2019 — License issued LIISS
KB3ONC Canceled Amateur Extra Feb 6, 2007 → Jul 9, 2019 (canceled)

Licensee
CONOR A CALLAHAN

Address
PO Box 426028
San Francisco, CA 94142

FRN
0016072688

Last granted
Oct 24, 2017

Effective
Jul 9, 2019

Last action
Jul 9, 2019
FCC actions (8)
- Jul 9, 2019 — License canceled LICAN
- Oct 24, 2017 — License renewed LIREN
- Jul 7, 2015 — Administrative update LIAUA
- Aug 7, 2014 — Administrative update LIAUA
- Mar 27, 2012 — Administrative update LIAUA
- May 2, 2007 — Administrative update LIAUA
- Feb 6, 2007 — License issued LIISS
- Feb 6, 2007 — Systematic call sign granted SYSGRT

Address history

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

Seen Apr 27, 2024 → Oct 11, 2026 · 13 snapshots · as KC0CO
CONOR A CALLAHAN
16663 Holly Ct, Buena Vista, CO 81211
38.8731, -106.1787 (street) · Grid DM68vu · CQ 4 · ITU 7 · map ↗
Seen Apr 16, 2022 → Oct 11, 2026 · 15 snapshots · as AJ6KK
CONOR A CALLAHAN
1286 Raleigh St, Denver, CO 80204
39.7348, -105.0207 (ZIP center) · Grid DM79lr · CQ 4 · ITU 7 · map ↗
Seen Aug 2, 2015 → Oct 11, 2026 · 34 snapshots · as KB3ONC
CONOR A CALLAHAN
PO Box 426028
San Francisco, CA 94142
Seen Mar 28, 2015 → Jun 6, 2015 · 3 snapshots · as KB3ONC
CONOR A CALLAHAN
2022 Eleanore Dr Apt 102, Glendale, CA 91206
34.1604, -118.2138 (ZIP center) · Grid DM04vd · CQ 3 · ITU 6 · map ↗
Seen May 28, 2012 → May 22, 2014 · 8 snapshots · as KB3ONC
CONOR A CALLAHAN
152 CAPETOWN DR, ALAMEDA, CA 94502
37.7395, -122.2395 (ZIP center) · Grid CM87vr · CQ 3 · ITU 6 · map ↗
Seen May 27, 2010 → Nov 10, 2011 · 3 snapshots · as KB3ONC
CONOR A CALLAHAN
30 HINES COURT, OLNEY, MD 20832
39.1503, -77.0783 (ZIP center) · Grid FM19ld · CQ 5 · ITU 8 · map ↗

Previous holder: MAURICE E WILLIAMSON

Held KC0CO Oct 7, 1986 → Feb 6, 2017 · first licensed Oct 7, 1986 as KC0CO · 1 license · FRN 0016062374
📖 In the printed callbooks since 1981 as WB0SUP, before the FCC's online records

KC0CO Expired Advanced Oct 7, 1986 → Feb 6, 2017 (expired)

Licensee
MAURICE E WILLIAMSON

Address
PO Box 9064
612 Martin St
GREENWOOD, MS 38930-9064
33.5277, -90.1387 (ZIP center) · Grid EM43wm · CQ 4 · ITU 7 · map ↗

FRN
0016062374

Last granted
Feb 6, 2007

Effective
Feb 6, 2007

Last action
Feb 12, 2019
FCC actions (3)
- Feb 12, 2019 — License expired LIEXP
- Feb 6, 2007 — License renewed LIREN
- Feb 4, 2007 — FCC action ESCFRN

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.

Seen Apr 4, 1997 → Apr 17, 2003 · 12 discs
KC0CO · Advanced · issued Jan 23, 1997, expires Jan 23, 2007
MAURICE E. WILLIAMSON
PO BOX 373, GREENWOOD, MS 38935-0373
Seen Sep 9, 1993 → Oct 27, 1996 · 7 discs
KC0CO · Advanced · issued Oct 7, 1986, expires Oct 7, 1996 · previously WB0SUP
MAURICE E WILLIAMSON
POB 11053, SPRINGFIELD, MO 65808

Address history

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

Seen May 27, 2010 → Oct 11, 2026 · 48 snapshots · as KC0CO
MAURICE E WILLIAMSON
PO Box 9064
612 Martin St, GREENWOOD, MS 38930-9064
33.5277, -90.1387 (ZIP center) · Grid EM43wm · CQ 4 · ITU 7 · map ↗
Seen Nov 7, 2004 · 1 snapshot · as KC0CO
MAURICE E WILLIAMSON
PO Box 373
GREENWOOD, MS 38935-0373

KC0CO 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.

1994 · 1 edition
KC0CO · class A
Maurice E Williamson
Pob 11053, Springfield, MO 65808
1994 p.17
1982 → 1986 · 3 editions
KC0CO · class A
Maurice Ewilliamson
1312d W Normal, Springfie~
Winter 1982 p.20, Winter 1983 p.18, Winter 1986 p.16

Vanity Applications Filed by KC0CO

Calls this licensee has asked the FCC for, newest first, in their order of preference. The FCC processes applications 18 days after filing; "likely award" is our estimate from every pending application in filing order.

Filed · Award	Applicant	Requested (in order)	Status
Filed Mar 9, 2021 Granted Mar 27, 2021 0009446189	AJ6KK · CONOR A CALLAHAN · Amateur Extra 1286 Raleigh St, Denver, CO 80204 39.7348, -105.0207 (ZIP center) · Grid DM79lr · CQ 4 · ITU 7 · map ↗	1.KC0CO ✓ Granted 2.KC0AC Available	Granted got KC0CO

Others Requesting KC0CO

2 applications listed KC0CO as a choice, newest first.

Filed	Award	Applicant	Choice #	KC0CO	Result
Mar 9, 2021	Mar 27, 2021	AJ6KK · CONOR A CALLAHAN · Denver, CO	1	Granted	Granted this call
Sep 13, 2005	Oct 1, 2005	KJ5ZB · HANS J RODRIGUES DE MIRANDA · Johnstown, CO	13	Not granted	They got KV0LT (choice 4)

📡 On the Air: APRS, Digital & WSPR Spots

No APRS positions, PSK Reporter reports or WSPR spots for KC0CO in the last 24 hours. They show up here within seconds of KC0CO beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.

Repeaters within 50 Miles

33 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)

Miles	Call	Name	Output	Offset	Tone	Mode	Networks	Activity	Location
28.2	KB0VJJ	Leadville Mosqui KB0VJJ	145.4450	-0.6	TONE 88.5	FM (analog)	🗓 1 net	1 net · 41 check-ins · 29 stations	Leadville, CO
41.0	KB0VJJ Offline	Breckenridge KB0VJJ	147.3900	+0.6	TONE 88.5	FM (analog)	🗓 1 net	1 net · 41 check-ins · 29 stations	Breckenridge, CO
20.5	N0SZ	Fairplay N0SZ	446.7625	-5	CC7	DMR	🗓 1 net	1 net · 38 check-ins · 15 stations	Fairplay, CO
25.3	N0SZ	Salida Methodist N0SZ RMHAM	446.8125	-5	CC7	DMR	RMHAM 🗓 1 net	1 net · 38 check-ins · 15 stations	Salida, CO
27.1	N0SZ	Boulder Lee Hl N0SZ RMHAM	445.0500	-5	CC9	DMR	RMHAM RMHR 🗓 1 net	1 net · 38 check-ins · 15 stations	Boulder, CO
41.9	N0SZ Offline	Breckenridge Bal N0SZ RMHAM	445.0875	-5	CC7	DMR	RMHAM 🗓 1 net	1 net · 38 check-ins · 15 stations	Breckenridge, CO
30.0	KC0CVU	Salida Methodist KC0CVU	145.2950	-0.6	TONE 107.2	FM (analog)	🗓 1 net	1 net · 35 check-ins · 21 stations	Salida, CO
30.3	KC0CVU	Salida Methodist KC0CVU AllStar	449.6500	-5	TONE 107.2	FM (analog)	AllStar 620591 🗓 1 net	1 net · 35 check-ins · 21 stations	Salida, CO
37.8	KC0CVU	Lake George Badg KC0CVU	147.3600	+0.6	TONE 107.2	FM (analog)	🗓 1 net	1 net · 35 check-ins · 21 stations	Lake George, CO
44.8	KC0CVU	Lake George KC0CVU	449.7000	-5	TONE 107.2	FM (analog)	🗓 1 net	1 net · 35 check-ins · 21 stations	Lake George, CO
11.1	W0LSD	Nathrop W0LSD	146.7450	-0.6	TONE 100.0	FM (analog)		—	Nathrop, CO
11.4	K0NR	Hartsel TC Pass K0NR	447.7250	-5	TSQL 100.0	FM (analog)		—	Hartsel, CO
23.8	AB0PC	Fairplay Sacrame AB0PC AllStar	447.1250	-5	TSQL 103.5	FM (analog)	AllStar 45840	—	Fairplay, CO
25.8	KF0KSB	Salida KF0KSB BM	430.4500	in 439.4500	CC7	DMR	BrandMeister 319539201	—	Salida, CO
26.1	K7PFJ	Fairplay K7PFJ RMHR	446.7625	+0.6	CC7	DMR	RMHR	—	Fairplay, CO
26.8	AB0PC	Fairplay Beaver AB0PC AllStar	147.0900	+0.6	TSQL 100.0	FM (analog)	AllStar 45840	—	Fairplay, CO
26.8	N0ZSN	Leadville Quail N0ZSN	147.2400	+0.6	TSQL 156.7	FM (analog)		—	Leadville, CO
26.9	KD0MRC	Maysville KD0MRC	145.3250	-0.6	TONE 100.0	FM (analog)		—	Maysville, CO
30.3	KD0QPG	Salida Methodist KD0QPG	446.9750	-5	none	D-STAR		—	Salida, CO
30.8	WA6IFI	Salida Methodist WA6IFI	927.8625	in 902.0250	none	P25		—	Salida, CO
37.3	WB0QMR	Silverthorne WB0QMR AllStar	146.7000	-0.6	TONE 107.2	FM (analog)	IRLP 3972 AllStar 506063	—	Silverthorne, CO
37.8	AA0BF	Fairplay AA0BF AllStar	447.1250	-5	TONE 103.5	FM (analog)	AllStar 45840	—	Fairplay C0, CO
37.8	NX0G	Lake George Badg NX0G	146.6850	-0.6	TONE 107.2	FM (analog)		—	Lake George, CO
39.5	KD0NU	Aspen Mtn KD0NU AllStar	447.0500	-5	TSQL 107.2	FM (analog) (C4FM,FM)	WIRES-X 50459 AllStar 40249	—	Aspen, CO
39.7	KD0NU Offline	Aspen KD0NU IRLP	446.8750	simplex	none	FM (analog)	IRLP 7052	—	Aspen, CO
41.0	KD0NU	Aspen KD0NU AllStar	442.3000	+5	TONE 136.5	FM (analog)	AllStar 516344	—	Aspen, CO
43.9	KK7PPV	Breckenridge KK7PPV	443.0500	+5	none	D-STAR		—	Breckenridge, CO
44.6	N2NXQ	Aspen N2NXQ IRLP	444.9250	simplex	TSQL 114.8	FM (analog)	IRLP 7418	—	Aspen, CO
46.2	WB0QCL	Gunnison WB0QCL	147.1200	+0.6	none	FM (analog)		—	Gunnison, CO
47.0	K0VQ Offline	Rifle K0VQ IRLP	446.1000	simplex	TSQL 100.0	FM (analog)	IRLP 7694	—	Rifle, CO
47.0	K0RV	Snowmass Village K0RV	146.6700	-0.6	TONE 107.2	FM (analog)		—	Snowmass Village, CO
48.8	K0MGL	Four Mile Teller K0MGL AllStar	448.6500	-5	TONE 103.5	FM (analog)	AllStar 582120	—	Four Mile, Teller, CO
49.8	KE0CO Offline	Burien KE0CO	434.4000	-5	CC?	DMR		—	Burien, WA