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

KP4MFO

Cancelled

Figueroa-Ostolaza, Melvin

Location: Bayamon, PR
Class: Amateur Extra
Granted: 2011-10-21
Expires: 2021-10-21
Previous call: WP4OKX
FRN: 0021068713

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Vanity availability

Available

Available now

KP4MFO cleared its 2-year hold on 2019-06-30. Eligible for vanity application.

Last held by Figueroa-Ostolaza, Melvin (PR).

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

WP4OKXcancelled· G
Figueroa-Ostolaza, MelvinPRgranted 2011-08-04cancelled 2011-10-21

Prior holders later became

KP3ZZactive· E
Figueroa-Ostolaza, MelvinPRgranted 2017-06-30

License history

0 events

No recorded events.

More vanity slots coming available

From Puerto Rico

All →

K5DTC 2026-09-14
WP4LKC 2026-09-14
KP4ECD 2026-09-16
WP3TU 2026-09-16
WP3TX 2026-09-16

Starting with KP4

All →

KP4ECD PR · 2026-09-16
KP4ED PR · 2026-10-05
KP4CH IN · 2026-10-11
KP4DEU PR · 2026-10-12
KP4GN PR · 2026-11-02

Full history → Vanity availability → Callsign genealogy →