Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4DK callsign genealogy
Currently held by Montalvo-Rivera, Julio C
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 WP4DK's current licensee, walking backwards.
- Montalvo-Rivera, Julio CPRgranted 2011-08-30cancelled 2018-04-24
Successor callsigns
Callsigns held now by people who previously held WP4DK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4DK, oldest first.
- ORTIZ, MIRINDA PR2003-10-03 → cancelled 2015-12-01
- Montalvo-Rivera, Julio C PR2018-04-24 active