Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ1MMY callsign genealogy
Currently held by Black, James 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 KJ1MMY's current licensee, walking backwards.
- Black, James JCAgranted 2018-05-30cancelled 2018-06-26
Successor callsigns
Callsigns held now by people who previously held KJ1MMY.
No current licensee on record previously held this callsign.