Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4SUL callsign genealogy
Currently held by SULLIVAN, RONALD A
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 KM4SUL's current licensee, walking backwards.
- SULLIVAN, RONALD ANCgranted 2014-07-04cancelled 2014-07-25
Successor callsigns
Callsigns held now by people who previously held KM4SUL.
- SULLIVAN, RONALD ANCgranted 2025-01-29