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

KO4BRB

Cancelled

BUTLER, BENJAMIN R

Location: MORRISTOWN, TN
Class: Amateur Extra
Granted: 2017-11-17
Expires: 2027-11-17
Previous call: KN4HCI
FRN: 0026932657

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Vanity availability

Available

Available now

KO4BRB cleared its 2-year hold on 2021-08-12. Eligible for vanity application.

Last held by BUTLER, BENJAMIN R (TN).

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 →

Previously held by current licensee

KN4HCIcancelled· T
BUTLER, BENJAMIN RTNgranted 2017-10-30cancelled 2017-11-17

Prior holders later became

KX4TQactive· E
BUTLER, BENJAMIN RTNgranted 2017-11-17

License history

0 events

No recorded events.

More vanity slots coming available

From Tennessee

All →

KG4VBE 2026-09-11
KK4LNP 2026-09-11
KK4LNQ 2026-09-11
KK4LNT 2026-09-11
KK4LNV 2026-09-11

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 →