Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA4TTI callsign genealogy
Currently held by HARTMAN, WILLIAM E
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 KA4TTI's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KA4TTI.
- HARTMAN, WILLIAM EVAgranted 2007-02-07cancelled 2019-05-01