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

KO4YZB

Cancelled

Greiner, Jason D

Location: Lakeland, TN
Class: General
Granted: 2021-08-17
Expires: 2031-08-17
Previous call: KO4SQQ
FRN: 0031196124

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

Vanity availability

Available

Available now

KO4YZB cleared its 2-year hold on 2024-04-11. Eligible for vanity application.

Last held by Greiner, Jason 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 →

Previously held by current licensee

KO4SQQactive· G
Greiner, Jason DTNgranted 2022-04-12

Prior holders later became

KO4SQQactive· G
Greiner, Jason DTNgranted 2022-04-12

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 →