🕒 FCC license data updated yesterday 7:15 am CST (FCC files through Nov 3, 2026) · next update today 6:00 am CST
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)
WB9MCO HAM
✅ Available for a vanity request — free since Sep 26, 2007.
2x3 call: any licensee can request it.
No pending applications list it.
Not currently held
· 1 holder on record
· available since Sep 26, 2007
Previous holder: THOMAS C HOLDORF
Held WB9MCO Nov 12, 1985 → Sep 25, 2005
· first licensed Nov 12, 1985 as WB9MCO
· 1 license · no FRN on file (pre-2001 records)
📖 In the printed callbooks since 1976 as WB9MCO, before the FCC's online records
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 Oct 26, 1995 → Apr 17, 2003 · 15 discs WB9MCO
· Technician Plus · issued Sep 25, 1995, expires Sep 25, 2005
THOMAS C. HOLDORF
15275 FRANKLIN DR, BROOKFIELD, WI 53005
Seen Oct 31, 1994 → May 12, 1995 · 2 discs WB9MCO
· Technician Plus · issued Nov 12, 1985, expires Nov 12, 1995
THOMAS C HOLDORF
POB 1627, MILWAUKEE, WI 53201
Seen Sep 9, 1993 → May 3, 1994 · 2 discs WB9MCO
· Technician · issued Nov 12, 1985, expires Nov 12, 1995
THOMAS C HOLDORF
POB 1627, MILWAUKEE, WI 53201
Address history
From FCC database snapshots (2004 → now). "Seen" dates are the first and last snapshot showing that address.
Seen Nov 7, 2004 → Nov 1, 2026 · 52 snapshots · as WB9MCO
THOMAS C HOLDORF
15275 FRANKLIN DR, BROOKFIELD, WI 53005
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.
1997 · 1 edition WB9MCO · class P
Thomas C Holdorf 15275 Franklin Dr, Brookfield, WI 53005 1997 p.1912
1995 · 1 edition WB9MCO · class T
Thomas C Hol Orf Pob 1627, Milwauk" W1 53201, IL 60618 1995 p.1785
1994 · 1 edition WB9MCO
Robert A Ribley 1022 Noble St, Virden, IL 62690 1994 p.1644
1992 · 1 edition WB9MCO · class T
Thomas C Holdorf Pob 1627, Milwaukee, WI 53101 1992 p.1434
1990 · 1 edition WB9MCO · class T
Thomas C Holdort Pob 1617, Milwaukee, WI 53101 Winter 1990 p.1266
1980 → 1981 · 2 editions WB9MCO · class T
Thomas C Holdorf Box 1627, Milwaukee, WI 53201 Winter 1980 p.1050, 1981 p.989
1979 · 1 edition WB9MCO · class T
Thomas C Hoidort Box 1627, Milwaukee, WI 53201 Winter 1979 p.479
1976 · 1 edition WB9MCO · class T
Thomas C Holdorf Box 1627, Milwaukee 53201 Wi Winter 1976 p.603
📡 On the Air: APRS, Digital & WSPR Spots
No APRS positions, PSK Reporter reports or WSPR spots for WB9MCO in the last 24 hours. They show up here within seconds of WB9MCO beaconing on APRS, being heard on FT8, FT4 and other digital modes, or sending a WSPR beacon.