How does Zoom Webinar track my location as an attendee?

My boss ran a report for a webinar that we did previously. It listed my location as some place that it should not have, but I am unsure how it gathers the location for an attendee. Can someone let me know how it lists the location?

I am thinking that it could be a few different ways.

1. IP address lookup

2. During registration is it entered?

3. Time-zone or other information entered in my profile somewhere