third-party domain
rezync.com
rezync.com appears in up to 158 of 46,505 Google Tag Manager containers audited by Tagora, across 2 endpoints.
Endpoints
One owner usually receives on several hostnames — a script host, a pixel host, a collection endpoint. They are separate grants of execution even though they answer to the same company.
Check your own container. See which of these it can reach.
Run a container check