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

KN4IOF

Cancelled

Calvert Jr, Marvin O

Location: Valrico, FL
Class: General
Granted: 2017-12-20
Expires: 2027-12-20
FRN: 0027019595

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Vanity availability

Available

Available now

KN4IOF cleared its 2-year hold on 2020-01-30. Eligible for vanity application.

Last held by Calvert Jr, Marvin O (FL).

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

W4MIGactive· E
Calvert Jr, Marvin OFLgranted 2018-01-30

License history

0 events

No recorded events.

More vanity slots coming available

From Florida

All →

K4CYG 2026-09-10
K4YDD 2026-09-10
KG4QXI 2026-09-10
KG4RVV 2026-09-10
KG4VAB 2026-09-10

Starting with KN4

All →

KN4ZVG FL · 2026-09-17
KN4LGK GA · 2026-09-21
KN4VXC NC · 2026-09-21
KN4RPM VA · 2026-10-07
KN4GAM GA · 2026-10-12

Full history → Vanity availability → Callsign genealogy →