🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 13, 2026) · next update today 8:30 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)
W4ZKW HAM
✅ Available for a vanity request — W4ZKW was last held in the 1990s (license expired Oct 14, 1996), 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
W4ZKW 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 27, 1996 · 1 disc W4ZKW
· Club / other · issued Oct 14, 1986, expires Oct 14, 1996
CLIFFORD A LUDWICK SR
4824 TAYLOR ST N, SAINT PETERSBURG, FL 33714
Seen Sep 9, 1993 → Apr 21, 1996 · 6 discs W4ZKW
· Advanced · issued Oct 14, 1986, expires Oct 14, 1996
CLIFFORD A LUDWICK SR
4824 TAYLOR ST N, SAINT PETERSBURG, FL 33714
W4ZKW 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.
1994 · 1 edition W4ZKW
Clifford A Ludwick Sr Silent Key Winter 1994 p.812
1984 → 1991 · 5 editions W4ZKW · class A
Clifford A Ludwick Sr 4b24 Taylor St N Winter 1984 p.595, Winter 1985 p.596, Winter 1987 p.605, Winter 1988 p.621, Winter 1991 p.683
1983 · 1 edition W4ZKW · class A
Clifford A Ludwick Sr 4824 Taylor St N St Petersburg, FL 33714 Winter 1983 p.572
1981 · 1 edition W4ZKW · class A
Clifford A Ludwick Sr 4824 Taylor St N, St Petersburg, FL 33714 1981 p.469
1980 · 1 edition W4ZKW · class A
Clifford A Ludwick Sr 4824 Ta~or St N, St Petersburg, FL 33714 Winter 1980 p.533
1979 · 1 edition W4ZKW
A Clifford " Ludwick Sr, 4824 Taylor Si N, 51 Peter.ilurg, FL 33714 Winter 1979 p.507
1974 → 1977 · 4 editions W4ZKW · class A
Clifford A Ludwick Sr 4824 Taylor St N Winter 1974 p.314, Winter 1975 p.312, Winter 1976 p.319, Winter 1977 p.345
1974 · 1 edition W4ZKW
A Cir)4 Gee Sr 4824 Taylor St N 1974 p.288
1971 → 1973 · 4 editions W4ZKW · class A
Clifford A Ludwick Sr 4624 Taylor St N Winter 1971 p.311, Fall 1971 p.312, Winter 1972 p.315, Winter 1973 p.315
1969 · 1 edition W4ZKW · class A
C L I F F O R D A Ludwick S R 4824 T A Y L O R St N Summer 1969 p.307
1961 → 1966 · 3 editions W4ZKW
Clifford A. Ludwick 146 33rd Av. N Fall 1961 p.293, Summer 1965 p.284, Spring 1966 p.285
1960 · 1 edition W4ZKW
Clifford A. Luowjck 146 33rd Ay1 N Winter 1960 p.280
1954 → 1959 · 5 editions W4ZKW
Clifford A. Ludwick 146-33rd Ave. N., St. Petersburg, FL Fall 1954 p.158, Fall 1955 p.195, Spring 1956 p.184, Summer 1958 p.229, Spring 1959 p.241
1954 · 1 edition W4ZKW
Clifford A. Ludwick 146-33rd Ave. N., St, Petersburg, FL Spring 1954 p.165
1952 → 1953 · 2 editions W4ZKW
C Lifford A. Ludwick 146-33rd A Ve.n ., S T. Petersburg, FL Fall 1952 p.155, Fall 1953 p.160
1951 · 1 edition W4ZKW
Clifford A Ludwick 110 6th A V E . N„, St, Petersburg, F L A . Spring 1951 p.143
1950 · 1 edition W4ZKW
C Lifford A Ludwick 110 8th Ave. N, St, Petersburg, FL Summer 1950 p.114
1948 → 1949 · 2 editions W4ZKW
Clifford A. Ludwick 110 6th Ave. N., St. Petersburg, FL Fall 1948 p.126, Summer 1949 p.111
None · 1 edition W4ZKW · class A
Clifford A Ludwick Sr 4824 Taylor St N, St Petersburg None p.288