Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN4KSR callsign genealogy
Currently held by HEARN, THOMAS R
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 KN4KSR's current licensee, walking backwards.
- HEARN, THOMAS RSCgranted 2016-03-05cancelled 2018-03-19
Successor callsigns
Callsigns held now by people who previously held KN4KSR.
- HEARN, THOMAS RSCgranted 2018-06-26