Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MR callsign genealogy
Currently held by Hartman SR, Michael C
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 K4MR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4MR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MR, oldest first.
- BENNETT, BRADFORD S NC2000-06-27 → cancelled 2010-05-11
- Hartman SR, Michael C AL2022-05-14 active