Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC2CK callsign genealogy
Currently held by DUFF, MICHAEL P
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 AC2CK's current licensee, walking backwards.
- DUFF, MICHAEL PNYgranted 2000-07-08cancelled 2010-01-21
- KB2KKYno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AC2CK.
- DUFF, MICHAEL PNYgranted 2019-11-20