Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI5TWA callsign genealogy
Currently held by Shannon, Mark A
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 KI5TWA's current licensee, walking backwards.
- Shannon, Mark ATXgranted 2020-12-01cancelled 2021-01-15
Successor callsigns
Callsigns held now by people who previously held KI5TWA.
- Shannon, Mark ATXgranted 2022-10-22