Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KR1SSZ callsign genealogy
Currently held by ZWIRKO, CHRISTINA 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 KR1SSZ's current licensee, walking backwards.
- ZWIRKO, CHRISTINA MMDgranted 2011-11-22cancelled 2017-06-02
Successor callsigns
Callsigns held now by people who previously held KR1SSZ.
No current licensee on record previously held this callsign.