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

KO4ABU

Cancelled

MACKALINE, CHARLES L

Location: CONCORD, NC
Class: Technician
Granted: 2019-11-18
Expires: 2029-11-18
FRN: 0028852374

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Vanity availability

Available

Available now

KO4ABU cleared its 2-year hold on 2022-01-03. Eligible for vanity application.

Last held by MACKALINE, CHARLES L (NC).

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

K4YOTactive· T
MACKALINE, CHARLES LNCgranted 2020-01-04

License history

0 events

No recorded events.

More vanity slots coming available

From North Carolina

All →

K4LWW 2026-09-10
K4ONS 2026-09-10
KG4TPH 2026-09-10
KK4LNB 2026-09-10
KK4LND 2026-09-10

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 →