Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MMR callsign genealogy
Currently held by Di Girolamo, Michael 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 K4MMR's current licensee, walking backwards.
- RICKETTS, MILDRED MVAgranted 1997-03-20cancelled 2005-06-11
Successor callsigns
Callsigns held now by people who previously held K4MMR.
- Di Girolamo, Michael JVAgranted 2022-07-06
All historical holders
Every license row we've seen with the callsign K4MMR, oldest first.
- Di Girolamo, Michael J VA2000-09-19 → cancelled 2002-07-06
- RICKETTS, MILDRED M VA2025-03-18 active