Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4OD callsign genealogy
Currently held by RIVERA, CARLOS
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 KP4OD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KP4OD.
- Walker-Guzman, Delmer OPRgranted 2026-04-17
All historical holders
Every license row we've seen with the callsign KP4OD, oldest first.
- RIVERA, CARLOS PR1997-10-20 → cancelled 2009-10-21
- Walker-Guzman, Delmer O PR2019-04-26 → cancelled 2026-04-17