Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4MJC callsign genealogy
Currently held by Colombo, Mark 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 N4MJC's current licensee, walking backwards.
- Colombo, Mark JVAgranted 2008-12-01cancelled 2011-03-15
Successor callsigns
Callsigns held now by people who previously held N4MJC.
No current licensee on record previously held this callsign.