🕒 FCC license data updated yesterday 6:02 am CDT (FCC files through Oct 16, 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)
K1ZKK HAM
✅ Available for a vanity request — K1ZKK was last held in the 1990s (license expired May 4, 1994), before the FCC's online records begin, so the two-year wait is long over. Confirm in the FCC's vanity system before applying.
1x3 call: Technician, General, Advanced and Amateur Extra licensees can request it.
No pending applications list it.
Not in the FCC's online records (1999 → now), but held before then: see below.
Held Before 1999
K1ZKK in the 1993–2003 Callbooks
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 31, 1994 → Apr 21, 1996 · 4 discs K1ZKK
· Technician Plus · issued May 4, 1984, expires May 4, 1994
BRUCE A HELMSDORFF
85 RICHARD RD, NEEDHAM, MA 02192
Seen Sep 9, 1993 → May 3, 1994 · 2 discs K1ZKK
· Technician · issued May 4, 1984, expires May 4, 1994
BRUCE A HELMSDORFF
85 RICHARD RD, NEEDHAM, MA 02192
K1ZKK 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.
1996 · 1 edition K1ZKK · class T
Bruce A Helmsdorff B5 Richard Rd, Needham, MA 02192 1996 p.263
1983 → 1994 · 4 editions K1ZKK · class T
Bruce A Helmsdorff 85 Richard Rd, Needham, MA 02192 Winter 1983 p.179, Winter 1986 p.183, Winter 1990 p.191, 1994 p.237
1982 · 1 edition K1ZKK · class G
Elsie B Ribble 1802 ·d· St Sw, Cedar Rapids, IA 52404 Winter 1982 p.102
1981 · 1 edition K1ZKK · class T
Bruce A Helmsdorff 85 Richard Rd, Needham, MA 02192 1981 p.103
1980 · 1 edition K1ZKK · class T
Bruce A Helmsdorff Bs Richard Rd, Needham, MA 02192 Winter 1980 p.167
1977 → 1979 · 2 editions K1ZKK · class T
Bruce A Helmsdorff 85 Richard Rd, Needham, MA 02192 Winter 1977 p.105, Winter 1979 p.161