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

KN4MZU

Cancelled

Renfro Jr, William C

Location: Birmingham, AL
Class: Technician
Granted: 2018-06-12
Expires: 2028-06-12
FRN: 0027613280

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Vanity availability

Available

Available now

KN4MZU cleared its 2-year hold on 2020-07-02. Eligible for vanity application.

Last held by Renfro Jr, William C (AL).

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

K4EEFactive· E
Renfro Jr, William CALgranted 2018-07-03

License history

0 events

No recorded events.

More vanity slots coming available

From Alabama

All →

KG4SUF 2026-09-10
KQ4TEB 2026-09-10
KQ4UQY 2026-09-10
KQ4UVF 2026-09-10
KZ4KU 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 →