Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SMM callsign genealogy
Currently held by Moon, Stephen M
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 K4SMM's current licensee, walking backwards.
- MCCOLLUM, STEVEN MGAgranted 2013-02-08cancelled 2020-03-13
Successor callsigns
Callsigns held now by people who previously held K4SMM.
- Moon, Stephen MALgranted 2017-11-04
All historical holders
Every license row we've seen with the callsign K4SMM, oldest first.
- Moon, Stephen M AL2009-08-11 → cancelled 2017-11-04
- MCCOLLUM, STEVEN M SC2020-03-13 active