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Domain footprint: defriesland.nl
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:
defriesland-nl.k-v1.mx.microsoft → Microsoft Corporation
SPF sends via:
spf.mailrelay.achmea.nl · mailplus.nl · spf.protection.outlook.com · _spf.zivver.com
Separately, 3 organisations whose name resembles “defriesland.nl” — these may be unrelated to the domain above.