🕒 FCC license data updated today 7:15 am CDT (FCC files through Oct 11, 2026) · next update tomorrow 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)
WN4CKF HAM
✅ Never issued — WN4CKF isn't in the FCC's public license data (which starts in 1999) or the 1993–2003 callbooks, and nothing in it blocks a vanity request. Calls like this are usually granted when requested.
2x3 call: any licensee can request it.
No pending applications list it.
The FCC has no record of WN4CKF ever being issued.
WN4CKF 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.
1990 → 1991 · 2 editions WN4CKF · class A
· later KM4YT
Steven M Krumm 1364 Map~grove Dr, Fairborn, OH 45324 Winter 1990 p.425, Winter 1991 p.454
1988 · 1 edition WN4CKF · class A
Steven M Krumm 1364 Maple~rove Dr, Fairborn, OH 45324 Winter 1988 p.426
1987 · 1 edition WN4CKF · class A
Steven Mkrumm 13b4 Maplegrove Dr, Fairborn, OH 45324 Winter 1987 p.416
1985 · 1 edition WN4CKF · class A
Stmn Mkrummd 13b4 Maple~ove Ord Fairborn Winter 1985 p.419
1983 · 1 edition WN4CKF · class A
Steven M Krumm 1364 Maplegrove Dr, Fairborn, OH 45324 Winter 1983 p.412
1979 → 1982 · 3 editions WN4CKF · class A
Steven M Krumm 4511 Kenwood Dr, Woortjridge, VA 22193 Winter 1979 p.372, Winter 1980 p.388, Winter 1982 p.398