Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM6SP callsign genealogy
Currently held by JOHNSTON, RICHARD 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 KM6SP's current licensee, walking backwards.
- Pellegrino, Steven JCAgranted 2017-09-11cancelled 2018-05-18
Successor callsigns
Callsigns held now by people who previously held KM6SP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM6SP, oldest first.
- JOHNSTON, RICHARD C CA2002-02-12 → cancelled 2014-04-08
- Pellegrino, Steven J CA2018-05-18 active