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Domain footprint: sinaopt.com

Resolved live just now — where this domain's services actually run, with each address attributed by OrgIndex. A DNS observation, not registry data: many organisations run entirely on providers' networks and hold no IP space of their own.

Web: 84.2.35.42 → MT GROUP COMPANY LIMITED

Mail: 57azpie65f3kgqqntobw7vzxw4jbfupitje6p3y4m35ypf6c4x5a.mx-verification.google.com · alt1.aspmx.l.google.com → Google LLC · alt2.aspmx.l.google.com → Google LLC · alt3.aspmx.l.google.com → Google LLC

SPF sends via: _spf.irq.hu · _spf.google.com

No organisation is registered under the name "sinaopt.com"

The addresses above are where it actually runs — resolved live and attributed to the operator that registered each range. That is the answer for a domain; a name match here would only add something if a company were registered under this name too.

Sites hosted on a provider (OVH, Cloudflare, AWS and the like) show that provider, because the address space is registered to them rather than to the site's owner.