Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC5RR callsign genealogy
Currently held by FILIPKOWSKI, MARK E
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 AC5RR's current licensee, walking backwards.
- KJ5NJJcancelledRadio RoamersOKgranted 2025-12-02cancelled 2025-12-30
Successor callsigns
Callsigns held now by people who previously held AC5RR.
- FILIPKOWSKI, MARK ENJgranted 2016-07-06cancelled 2023-05-21
All historical holders
Every license row we've seen with the callsign AC5RR, oldest first.
- FILIPKOWSKI, MARK E AR1998-11-03 → cancelled 2006-08-26
- Radio Roamers OK2025-12-30 active