Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0SPM callsign genealogy
Currently held by Markman, Steven
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 K0SPM's current licensee, walking backwards.
- Markman, StevenCOgranted 2024-02-09cancelled 2024-03-09
Successor callsigns
Callsigns held now by people who previously held K0SPM.
No current licensee on record previously held this callsign.