Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4ZLY callsign genealogy
Currently held by Arce, Jairo R
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 KB4ZLY's current licensee, walking backwards.
- Arce, Jairo RRIgranted 2008-02-05cancelled 2008-03-04
Successor callsigns
Callsigns held now by people who previously held KB4ZLY.
- ARCE, JAIRO RFLgranted 2019-02-06