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

K5MMO

Cancelled

DU BOIS, RALPH M

Location: DEWEY, OK
Class: Advanced
Granted: 1998-05-04
Expires: 2008-05-04
FRN: 0014460034

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Vanity availability

288d

Available on 2027-06-24

K5MMO cancelled on 2025-06-24. Hold ends in 288 days.

Last held by MEZA, MARTIN R (TX).

Confidence: High

Cancelled licenses begin the 2-year hold immediately on the cancellation date, so this is the firm release date per §97.19.

Callsign genealogy

Previously held by current licensee

W0MMOcancelled· E
MEZA, MARTIN RTXgranted 2008-05-09cancelled 2009-03-10
KC0ZGAcancelled· G
Meza, Martin RCOgranted 2007-01-08cancelled 2008-05-09

Prior holders later became

WA5UNIactive· E
MEZA, MARTIN RTXgranted 2025-06-24
W5MMFexpired· A
DU BOIS, RALPH MOKgranted 2006-01-19cancelled 2018-01-20

License history

0 events

No recorded events.

More vanity slots coming available

From Oklahoma

KD5TUY 2026-09-10
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KF5RYN 2026-09-11
KF5RYO 2026-09-11
KJ5HQD 2026-09-13

Starting with K5

K5HS LA · 2026-09-13
K5SSR NM · 2026-09-13
K5DTC PR · 2026-09-14
K5MJT TX · 2026-09-14
K5QQA TX · 2026-09-16

Full history → Vanity availability → Callsign genealogy →