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Domain footprint: umk.pl
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:
158.75.1.100 → TORMAN-EDU
Mail:
smtp.umk.pl → TORMAN-EDU
SPF sends via:
spf.protection.outlook.com
Separately, 9 organisations whose name resembles “umk.pl” — these may be unrelated to the domain above.