Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WP4HM callsign genealogy
Currently held by Berrios - Lopez, Hugo M
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 WP4HM's current licensee, walking backwards.
- Berrios - Lopez, Hugo MPRgranted 2019-05-31cancelled 2019-06-21
Successor callsigns
Callsigns held now by people who previously held WP4HM.
No current licensee on record previously held this callsign.