Confidence: Medium · Source: FCC ULS · As of 2026-09-11

KO4GQV

Cancelled

Estabrook Sr, Mark D

Location: Signal Mountain, TN
Class: Amateur Extra
Granted: 2020-08-26
Expires: 2030-08-26
FRN: 0029786670

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Vanity availability

Available

Available now

KO4GQV cleared its 2-year hold on 2025-03-23. Eligible for vanity application.

Last held by Estabrook Sr, Mark D (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 →

Prior holders later became

WA4TXactive· E
Estabrook Sr, Mark DTNgranted 2023-03-24

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 →