Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WP4JW callsign genealogy
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by WP4JW's current licensee, walking backwards.
- ARROYO CRUZ, JUAN APRgranted 2008-05-12cancelled 2016-12-06
Successor callsigns
Callsigns held now by people who previously held WP4JW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4JW, oldest first.
- ARROYO CRUZ, JUAN A PR2016-12-06 active
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