Confidence: Medium · Source: FCC ULS · As of 2026-09-12

KP4ZU

Expired

Fernandez, Ruben

Location: San Antonio, PR
Class: Advanced
Granted: 2014-04-24
Expires: 2024-07-09
Previous call: WP4MQB
FRN: 0001840388

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Vanity availability

663d

Available on 2028-07-08

KP4ZU expired on 2024-07-09. Hold ends in 663 days.

Last held by Fernandez, Ruben (PR).

Confidence: High

Expired licenses get a 2-year FCC renewal grace period followed by the 2-year hold. The date shown accounts for both, so it's the firm release date per §97.19.

Callsign genealogy

Full chain →

Previously held by current licensee

WP4MQB
no FCC ULS record on file

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 →