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

KP4AJC

Active

CALDERON, ADRIAN J

Location: Las Piedras, PR
Class: Amateur Extra
Granted: 2021-02-25
Expires: 2031-04-22
Previous call: WP4LXU
FRN: 0008348351

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Vanity availability

Held

Currently held

KP4AJC is held by an active license; it isn't a vanity slot right now.

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

WP4LXUcancelled· T
CALDERON, ADRIAN JPRgranted 2003-01-29cancelled 2011-04-22

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 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 →