Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1JU callsign genealogy
Currently held by Murphy, Stephen J
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 KA1JU's current licensee, walking backwards.
- Guenther, Tank DWYgranted 2020-06-19cancelled 2020-09-26
Successor callsigns
Callsigns held now by people who previously held KA1JU.
- Murphy, Stephen JWYgranted 2017-12-19
All historical holders
Every license row we've seen with the callsign KA1JU, oldest first.
- Murphy, Stephen J WY2017-02-22 → cancelled 2017-12-19
- Guenther, Tank D NM2020-09-26 active