Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4MM callsign genealogy
Currently held by Santiago-Alejandro, Manuel A
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 WP4MM's current licensee, walking backwards.
- Santiago-Alejandro, Manuel APRgranted 2015-11-03cancelled 2016-02-17
Successor callsigns
Callsigns held now by people who previously held WP4MM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WP4MM, oldest first.
- NARVAEZ MORALES, HERMINIA PR1997-10-07 → cancelled 2009-10-08
- Santiago-Alejandro, Manuel A PR2016-02-17 active