🕒 FCC license data updated yesterday 9:45 am CDT · 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
KJ4AAJ HAM
✅ Available for a vanity request — free since Nov 21, 2009.
2x3 call: any licensee can request it.
No pending applications list it.
Oct 22, 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 May 27, 2010 → Oct 4, 2026 · 94 snapshots · as KJ4AAJ
North American Network Operators' Group ARC
Attn: Robert E Seastrom PO Box 9303 C/o Robert Seastrom, McLean, VA 22102
No APRS positions, PSK Reporter reports or WSPR spots for KJ4AAJ in the last 24 hours. They show up here within seconds of KJ4AAJ beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.