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Domain footprint: doubleverify.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.
Mail:
mxa-005c0b02.gslb.pphosted.com → Proofpoint, Inc. ·
mxb-005c0b02.gslb.pphosted.com → Proofpoint, Inc.
SPF sends via:
%{ir}.%{v}.%{d}.spf.has.pphosted.com
Separately, 5 organisations whose name resembles “doubleverify.com” — these may be unrelated to the domain above.