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Domain footprint: celnisprava.gov.cz
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.
Mail:
celnisprava-gov-cz.n-v1.mx.microsoft → Microsoft Corporation
SPF sends via:
spf.protection.outlook.com
No organisation is registered under the name "celnisprava.gov.cz"
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.