uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-09

KR1ZAN callsign genealogy

Currently held by KRIZAN, FRANK 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 KR1ZAN's current licensee, walking backwards.

  1. KR5Nactive· E
    ROLSMA, GARRY BTXgranted 2024-11-09
  2. NE7Acancelled· E
    ROLSMA, GARRY BTXgranted 2014-12-09cancelled 2024-11-09

Successor callsigns

Callsigns held now by people who previously held KR1ZAN.

  1. KR5Ncancelled· E
    KRIZAN, FRANK JTXgranted 2021-02-17cancelled 2022-10-21
  2. K5HScancelled· E
    KRIZAN, FRANK JTXgranted 2015-03-24cancelled 2017-05-06

All historical holders

Every license row we've seen with the callsign KR1ZAN, oldest first.

  • KRIZAN, FRANK J TX
    2008-01-01 → cancelled 2015-03-24
  • KRIZAN, FRANK J TX
    2017-05-06 → cancelled 2021-02-17
  • KRIZAN, FRANK J TX
    2022-10-21 active
← Back to KR1ZAN License history →