Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ7TWR callsign genealogy
Currently held by Butler, Don
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 KJ7TWR's current licensee, walking backwards.
- Butler, DonIDgranted 2017-07-25cancelled 2020-04-04
Successor callsigns
Callsigns held now by people who previously held KJ7TWR.
No current licensee on record previously held this callsign.