Confidence: Medium · Source: FCC ULS · As of 2026-09-10

KO4EIF

Cancelled

Winkler, Kevin S

Location: Radcliff, KY
Class: Technician
Granted: 2020-06-15
Expires: 2030-06-15
FRN: 0027645142

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Vanity availability

Available

Available now

KO4EIF cleared its 2-year hold on 2022-07-07. Eligible for vanity application.

Last held by Winkler, Kevin S (KY).

Confidence: High

Cancelled licenses begin the 2-year hold immediately, so this date is the firm release date per §97.19. Already past — fileable subject to FCC verification.

Callsign genealogy

Full chain →

Prior holders later became

K4WNKactive· T
Winkler, Kevin SKYgranted 2020-07-07

License history

0 events

No recorded events.

More vanity slots coming available

From Kentucky

All →

KD4STD 2026-09-10
KK4LMT 2026-09-10
KG4VAS 2026-09-11
KG4VAT 2026-09-11
K4OTU 2026-09-14

Starting with KO4

All →

KO4UTL FL · 2026-09-13
KO4PTL KY · 2026-09-17
KO4OSB VA · 2026-09-21
KO4TMC FL · 2026-09-21
KO4YVJ FL · 2026-09-24

Full history → Vanity availability → Callsign genealogy →