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

KJ4UDR

Cancelled

Knappenberger, Jason T

Location: Orlando, FL
Class: General
Granted: 2010-04-13
Expires: 2020-04-13
FRN: 0019720770

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Vanity availability

Available

Available now

KJ4UDR cleared its 2-year hold on 2012-05-27. Eligible for vanity application.

Last held by Knappenberger, Jason T (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

W1JTKactive· E
Knappenberger, Jason TFLgranted 2020-02-29

License history

0 events

No recorded events.

More vanity slots coming available

From Florida

All →

KD4SPY 2026-09-11
KK4LOA 2026-09-11
KB1HYE 2026-09-12
KO4UTL 2026-09-13
KQ4RHZ 2026-09-13

Starting with KJ4

All →

KJ4ZTP WA · 2026-09-13
KJ4RVA FL · 2026-10-11
KJ4ZQX SC · 2026-10-29
KJ4AAD GA · 2026-11-05
KJ4RZZ FL · 2026-11-08

Full history → Vanity availability → Callsign genealogy →