🕒 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)
W6ZKO HAM
✅ Available for a vanity request — W6ZKO was last held in the 1990s (license expired Jun 1, 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
W6ZKO 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 Sep 9, 1993 → Apr 21, 1996 · 6 discs W6ZKO
· Advanced · issued Jun 1, 1984, expires Jun 1, 1994
ALLAN D HOLDER SR
418 CALLA AVE, IMPERIAL BEACH, CA 92032
W6ZKO 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 → 1996 · 2 editions W6ZKO · class A
Allan D Holder Sr 418 Calla Ave, Imperial Beach, CA 92032 1994 p.1253, 1996 p.1405
1987 · 1 edition W6ZKO · class G
Betty M S Vercoe 45b6 East Brown, Fresno, CA 93703 Winter 1987 p.907
1983 · 1 edition W6ZKO · class A
Allan D Holder 418 Calla Av, Imperial Beach, CA 92032 Winter 1983 p.853
1982 · 1 edition W6ZKO · class A
Allan D Holder 41b Calla Av, Imperial Beach, CA 92032 Winter 1982 p.827
1976 → 1981 · 4 editions W6ZKO · class A
Allan D Holder 418 Calla Av, Imperial Beach 92032 Winter 1976 p.459, Winter 1977 p.499, Winter 1979 p.240, 1981 p.729
1974 · 1 edition W6ZKO · class A
Allan D Halder 418 Calla Av Imperial Beach 1974 p.426
1972 · 1 edition W6ZKO · class G
Betty M S Vercoe 4586 E Brown, Fresno 93703 Winter 1972 p.455
1971 · 2 editions W6ZKO · class A
Allan D Holder 418 Calla Av, Imperial Beach Winter 1971 p.450, Fall 1971 p.450
1970 · 1 edition W6ZKO · class G
Betty M S Vercoe 4586 E Brown 1 Fresno 93703 Spring 1970 p.451
1969 · 1 edition W6ZKO · class G
Betty M . S . V E R C O E 4 5 8 6 E . Brown, Fresno 3 Summer 1969 p.444
1968 · 1 edition W6ZKO · class A
Allan O. Holder 41 8 Calla St, _imperial Beach Winter 1968 p.440
1964 · 1 edition W6ZKO · class A
L L A N D. H O L D E R 4 1 8 C A L L A St, I M P E R I A L B E A C H Fall 1964 p.396
1962 → 1963 · 2 editions W6ZKO
Allan D T Holder 418 Calla St, Imperial. Beach Fall 1962 p.404, Summer 1963 p.421
1961 · 1 edition W6ZKO
Allan D. Holder# 418 Calla St# Imperial Beach Spring 1961 p.404
1960 · 1 edition W6ZKO
Betty M.s. Vercoe 4586 E. Brown, Fresno Winter 1960 p.403
1955 → 1958 · 3 editions W6ZKO
Allan D. Holder Post Office Box 403, Imperial Beach Fall 1955 p.279, Fall 1957 p.334, Summer 1958 p.338
1950 → 1953 · 3 editions W6ZKO
Allan D. Holder 726 Ocean Front, Im Perial Beach Summer 1950 p.163, Fall 1952 p.217, Fall 1953 p.226
None · 1 edition W6ZKO · class A
Allan D Holder 418 Calla Av, Imperial Beach None p.426