Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA9COG callsign genealogy
Currently held by MULGREW, RONALD 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 KA9COG's current licensee, walking backwards.
- MULGREW, RONALD ECAgranted 2017-02-03cancelled 2017-03-07
Successor callsigns
Callsigns held now by people who previously held KA9COG.
- MULGREW, RONALD ECAgranted 2017-03-07cancelled 2019-07-12