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

KO4YZR

Cancelled

Yost, William C

Location: Culleoka, TN
Class: Technician
Granted: 2022-03-24
Expires: 2032-03-24
FRN: 0031613151

Get notified about status changes and vanity availability for this callsign.

Vanity availability

Available

Available now

KO4YZR cleared its 2-year hold on 2024-04-11. Eligible for vanity application.

Last held by Yost, William C (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

K4ZZAactive· T
Yost, William CTNgranted 2022-04-12

License history

0 events

No recorded events.

More vanity slots coming available

From Tennessee

All →

KG4TWC 2026-09-10
KK4LNE 2026-09-10
KK4LNK 2026-09-10
KQ4TPH 2026-09-10
KQ4UUA 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 →