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Domain footprint: sbd-tr.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:
mail.mathesio.com → HTELECOM-HS1-NET
SPF sends via:
hotmail.com
Separately, 2 organisations whose name resembles “sbd-tr.cz” — these may be unrelated to the domain above.