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

WP4STS

Cancelled

SIERRA FRANCO, LUIS O

Location: CAGUAS, PR
Class: Technician
Granted: 2023-04-18
Expires: 2033-04-18
FRN: 0029142841

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Vanity availability

Available

Available now

WP4STS cleared its 2-year hold on 2025-05-30. Eligible for vanity application.

Last held by SIERRA FRANCO, LUIS O (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 →

Prior holders later became

KP4LOSactive· T
SIERRA FRANCO, LUIS OPRgranted 2023-05-31

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 →