Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4DM callsign genealogy
Currently held by MERCADO, DIEGO
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 KP4DM's current licensee, walking backwards.
- RODRIGUEZ ROSADO, MIGDALIAPRgranted 2004-08-04cancelled 2016-08-05
Successor callsigns
Callsigns held now by people who previously held KP4DM.
- SCHULER, JOHN RPRgranted 1987-08-25cancelled 1999-09-01