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

KF6UDW

Cancelled

RIDDLEBARGER, CLIFF G

Location: Brea, CA
Class: Technician
Granted: 1998-12-14
Expires: 2008-12-14
FRN: 0010650646

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

Vanity availability

Available

Available now

KF6UDW cleared its 2-year hold on 2008-06-26. Eligible for vanity application.

Last held by RIDDLEBARGER, CLIFF G (CA).

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

K6UDWactive· G
RIDDLEBARGER, CLIFF GCAgranted 2016-04-05

License history

0 events

No recorded events.

More vanity slots coming available

From California

All →

AC2TX 2026-09-10
K6DJM 2026-09-10
KC6JGS 2026-09-10
KC6KGL 2026-09-10
KC6VEU 2026-09-10

Starting with KF6

All →

KF6GYH AR · 2026-09-17
KF6UW SC · 2026-10-16
KF6UT NM · 2026-10-21
KF6CNP CA · 2026-10-29
KF6WKB CA · 2026-11-09

Full history → Vanity availability → Callsign genealogy →