Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KJM callsign genealogy
Currently held by MILLARD Sr., JOSEPH P
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 K4KJM's current licensee, walking backwards.
- Morris, Keith JALgranted 2012-05-31cancelled 2013-01-23
Successor callsigns
Callsigns held now by people who previously held K4KJM.
- MILLARD Sr., JOSEPH PFLgranted 2019-12-31
All historical holders
Every license row we've seen with the callsign K4KJM, oldest first.
- HORN, MATTHIAS R FL1993-10-26 → cancelled 2005-10-27
- MILLARD Sr., JOSEPH P FL2007-12-04 → cancelled 2009-12-29
- Morris Sr, Keith J AL2023-01-18 active