Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5SPP callsign genealogy
Currently held by Williams, Mark O
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 K5SPP's current licensee, walking backwards.
- Williams, Mark OTXgranted 2012-11-07cancelled 2014-05-28
Successor callsigns
Callsigns held now by people who previously held K5SPP.
No current licensee on record previously held this callsign.