Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC4EM callsign genealogy
Currently held by Clark, Andrew 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 AC4EM's current licensee, walking backwards.
- Clark, Andrew EMIgranted 2012-04-25cancelled 2015-06-09
Successor callsigns
Callsigns held now by people who previously held AC4EM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AC4EM, oldest first.
- CARDWELL, JACK E TN2001-01-04 → cancelled 2013-04-03
- Clark, Andrew E MI2025-06-07 active