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

WP4MB

Cancelled

OTERO HERNANDEZ, PEDRO J

Location: MAYAGUEZ, PR
Class: Amateur Extra
Granted: 2010-06-22
Expires: 2020-06-22
Previous call: WP4NFB
FRN: 0001832864

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Vanity availability

Unknown

Status unknown

No vanity-slot record on file for WP4MB. Either it has never been issued, is currently held by an active license, or hasn't been re-computed since its last freeing event.

Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).

Callsign genealogy

Full chain →

Previously held by current licensee

WP4PCDcancelled· T
MERCADO, JOSE JPRgranted 2014-06-30cancelled 2018-10-16

Prior holders later became

KP4TCcancelled· E
OTERO HERNANDEZ, PEDRO JPRgranted 2013-11-09cancelled 2016-05-13

License history

0 events

No recorded events.

More vanity slots coming available

From Puerto Rico

All →

WP4TLD 2026-09-10
K5DTC 2026-09-14
WP4LKC 2026-09-14
KP4ECD 2026-09-16
WP3TU 2026-09-16

Starting with WP4

All →

WP4TLD PR · 2026-09-10
WP4LKC PR · 2026-09-14
WP4MRN UT · 2026-09-17
WP4TKL PR · 2026-09-17
WP4KNF PR · 2026-09-18

Full history → Vanity availability → Callsign genealogy →