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Domain footprint: blueshieldca.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-0009a802.gslb.pphosted.com → Proofpoint, Inc. ·
mxb-0009a802.gslb.pphosted.com → Proofpoint, Inc.
SPF sends via:
%{ir}.%{v}.%{d}.spf.has.pphosted.com · amazonses.com
No organisation is registered under the name "blueshieldca.com"
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.