Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC1MJ callsign genealogy
Currently held by HARTNETT, SEAN 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 AC1MJ's current licensee, walking backwards.
- HARTNETT, SEAN ANHgranted 2021-11-22cancelled 2021-12-20
Successor callsigns
Callsigns held now by people who previously held AC1MJ.
No current licensee on record previously held this callsign.