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

KO4SRU

Cancelled

POSTON, BILL

Location: BLYTHEWOOD, SC
Class: Amateur Extra
Granted: 2021-07-12
Expires: 2031-07-12
Previous call: KO4RUI
FRN: 0031024847

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Vanity availability

Available

Available now

KO4SRU cleared its 2-year hold on 2023-10-01. Eligible for vanity application.

Last held by POSTON, BILL (SC).

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

KO4RUIcancelled· G
Poston, BillSCgranted 2021-07-12cancelled 2021-08-19

Prior holders later became

KD4NOXcancelled· E
Poston, William LSCgranted 2021-10-01cancelled 2022-09-30

License history

0 events

No recorded events.

More vanity slots coming available

From South Carolina

All →

KQ4URH 2026-09-10
KG4VBH 2026-09-12
KK4LOZ 2026-09-13
KK4LPA 2026-09-13
KK4LPE 2026-09-13

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 →