Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8MJC callsign genealogy
Currently held by Costa, Michael J
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 K8MJC's current licensee, walking backwards.
- Costa, Michael JMIgranted 2010-09-10cancelled 2010-10-05
Successor callsigns
Callsigns held now by people who previously held K8MJC.
No current licensee on record previously held this callsign.