N9TPB FCC License Search

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

K3OSO

Not currently held · 1 holder on record · available since Feb 2, 2013

Previous holder: Aleksey Grachev

Held K3OSO May 5, 2009 → Feb 1, 2011 · first licensed Apr 13, 2009 as KD0HHE · 3 licenses · FRN 0018686162

AF0E Active Amateur Extra · vanity Feb 1, 2011 → expires Feb 1, 2031

Licensee
Aleksey Grachev

Address
PO Box 351703
Westminster, CO 80035

FRN
0018686162

Previous call
K3OSO (General)

Last granted
Jan 6, 2021

Effective
Jan 6, 2021

Last action
Jan 6, 2021
FCC actions (3)
- Jan 6, 2021 — License renewed LIREN
- Feb 1, 2011 — Vanity call sign granted VANGRT
- Feb 1, 2011 — License issued LIISS
K3OSO Canceled Amateur Extra · vanity May 5, 2009 → Feb 1, 2011 (canceled)

Licensee
Aleksey Grachev

Address
PO Box 351703
Westminster, CO 80035

FRN
0018686162

Previous call
KD0HHE (General)

Last granted
May 5, 2009

Effective
Nov 20, 2010

Last action
Feb 1, 2011
FCC actions (7)
- Feb 1, 2011 — License canceled LICAN
- Nov 20, 2010 — FCC action LIAUA
- Nov 18, 2010 — License modified LIMOD
- Jun 12, 2009 — License modified LIMOD
- May 7, 2009 — FCC action LIAUA
- May 5, 2009 — Vanity call sign granted VANGRT
- May 5, 2009 — License issued LIISS
KD0HHE Canceled Technician Apr 13, 2009 → May 5, 2009 (canceled)

Licensee
Aleksey G Grachev

Address
4488 W 110th Cir
Westminster, CO 80031
39.8739, -105.0388 (ZIP center) · Grid DM79lu · CQ 4 · ITU 7 · map ↗

FRN
0018686162

Last granted
Apr 13, 2009

Effective
Apr 13, 2009

Last action
May 5, 2009
FCC actions (3)
- May 5, 2009 — License canceled LICAN
- Apr 13, 2009 — License issued LIISS
- Apr 13, 2009 — 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 May 27, 2010 → Sep 27, 2026 · 91 snapshots · as K3OSO
Aleksey Grachev
PO Box 351703
Westminster, CO 80035
Seen May 27, 2010 → Sep 27, 2026 · 46 snapshots · as KD0HHE
Aleksey G Grachev
4488 W 110th Cir, Westminster, CO 80031
39.8739, -105.0388 (ZIP center) · Grid DM79lu · CQ 4 · ITU 7 · map ↗

Vanity requests for K3OSO

3 applications listed K3OSO as a choice, newest first.

Filed	Award	Applicant	Choice #	Status
Aug 27, 2026	Sep 14, 2026	KR4OHU · Michael P Aubut · Orlando, FL	3	Granted
Sep 29, 2025	Oct 17, 2025	KD3BYI · Annette Y Lee · Bethesda, MD	3	Granted
Apr 17, 2009	May 5, 2009	KD0HHE · Aleksey G Grachev · Westminster, CO	1	Granted