Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS4MM callsign genealogy
Currently held by VILLANUEVA, FRANCISCO B
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 KS4MM's current licensee, walking backwards.
- Balch, Christopher DGAgranted 2009-06-22cancelled 2012-06-23
Successor callsigns
Callsigns held now by people who previously held KS4MM.
- VILLANUEVA, FRANCISCO BKSgranted 2024-09-11
All historical holders
Every license row we've seen with the callsign KS4MM, oldest first.
- VILLANUEVA, FRANCISCO B KS2004-09-09 → cancelled 2004-09-10
- BALCH, CHRISTOPHER D GA2022-06-03 active