N9TPB FCC License Search

🕒 FCC license data updated yesterday 9:42 am CDT (FCC files through Sep 30, 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

KB1HDO HAM

✅ Available for a vanity request — free since Jan 11, 2008.

2x3 call: any licensee can request it. No pending applications list it.

📬 QSL: LoTW user, last upload Dec 11, 2006 · eQSL AG member

Not currently held · 1 holder on record · available since Jan 11, 2008

Previous holder: John A Griswold

Held KB1HDO Aug 23, 2001 → Jan 10, 2006 · first licensed Aug 23, 2001 as KB1HDO · 2 licenses · FRN 0005201736

KK1X Active Amateur Extra · vanity Jan 10, 2006 → expires Jan 10, 2036

Licensee
John A Griswold

Address
34 Cambridge St
Ayer, MA 01432
42.5605, -71.5855 (street) · Grid FN42en · CQ 5 · ITU 8 · map ↗

FRN
0005201736

Previous call
KB1HDO (General)

Last granted
Dec 6, 2025

Effective
Dec 6, 2025

Last action
Dec 6, 2025
FCC actions (6)
- Dec 6, 2025 — License renewed LIREN
- Oct 16, 2015 — License renewed LIREN
- Oct 10, 2012 — Administrative update LIAUA
- Sep 19, 2006 — Administrative update LIAUA
- Jan 10, 2006 — Vanity call sign granted VANGRT
- Jan 10, 2006 — License issued LIISS
KB1HDO Canceled Amateur Extra Aug 23, 2001 → Jan 10, 2006 (canceled)

Licensee
John A Griswold

Address
34 Cambridge St
Ayer, MA 01432
42.5605, -71.5855 (street) · Grid FN42en · CQ 5 · ITU 8 · map ↗

FRN
0005201736

Last granted
Aug 23, 2001

Effective
Nov 17, 2004

Last action
Jan 10, 2006
FCC actions (6)
- Jan 10, 2006 — License canceled LICAN
- Nov 17, 2004 — Administrative update LIAUA
- Sep 2, 2003 — License modified LIMOD
- Apr 28, 2003 — License modified LIMOD
- Mar 12, 2002 — License modified LIMOD
- Aug 23, 2001 — License issued LIISS

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 · 93 snapshots · as KB1HDO
John A Griswold
34 Cambridge St, Ayer, MA 01432
42.5605, -71.5855 (street) · Grid FN42en · CQ 5 · ITU 8 · map ↗

📡 On the air: APRS, digital & WSPR spots

No APRS positions, PSK Reporter reports or WSPR spots for KB1HDO in the last 24 hours. They show up here within seconds of KB1HDO beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.