Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1OOS callsign genealogy
Currently held by MC MULLEN, JASON D
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 K1OOS's current licensee, walking backwards.
- MC MULLEN, JASON DTXgranted 2016-12-06cancelled 2017-01-06
Successor callsigns
Callsigns held now by people who previously held K1OOS.
No current licensee on record previously held this callsign.