Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4OPQ callsign genealogy
Currently held by Lopez, Julio A
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 KN4OPQ's current licensee, walking backwards.
- Lopez, Julio AFLgranted 2018-07-18cancelled 2018-08-20
Successor callsigns
Callsigns held now by people who previously held KN4OPQ.
- Lopez, Julio AFLgranted 2018-09-07