Confidence: Medium · Source: FCC ULS · As of 2026-09-09
KC3MJH callsign genealogy
Currently held by Hahn, 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 KC3MJH's current licensee, walking backwards.
- Hahn, Mark JMDgranted 2015-08-17cancelled 2016-09-20
Successor callsigns
Callsigns held now by people who previously held KC3MJH.
- Hahn, Mark JMDgranted 2024-09-13