Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA7TYU callsign genealogy
Currently held by CHRISTOPHERSON, JANICE M
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 KA7TYU's current licensee, walking backwards.
- CHRISTOPHERSON, JANICE MWAgranted 1998-10-23cancelled 2000-01-25
Successor callsigns
Callsigns held now by people who previously held KA7TYU.
- CHRISTOPHERSON, JANICE MWAgranted 1998-10-23cancelled 2000-01-25
All historical holders
Every license row we've seen with the callsign KA7TYU, oldest first.
- CHRISTOPHERSON, JANICE M CO1998-10-23 → cancelled 1999-12-10
- CHRISTOPHERSON, JANICE M WA2019-11-18 active