Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4EML callsign genealogy
Currently held by Muniz Lopez, Efrain
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 KP4EML's current licensee, walking backwards.
- Muniz Lopez, EfrainPRgranted 2015-02-05cancelled 2015-03-03
Successor callsigns
Callsigns held now by people who previously held KP4EML.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4EML, oldest first.
- SERAPION, JENOFONTE L PR1998-04-28 → cancelled 2010-04-29
- Muniz Lopez, Efrain PR2025-02-04 active