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Domain footprint: arena1.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.
Web:
137.116.53.143 → Microsoft Corporation
Mail:
arena1-com.mail.protection.outlook.com → Microsoft Corporation ·
mxa-0093d701.gslb.pphosted.com → Proofpoint, Inc. ·
mxb-0093d701.gslb.pphosted.com → Proofpoint, Inc.
SPF sends via:
spf.arena1.com · spf.protection.outlook.com · sendgrid.net
Separately, 5 organisations whose name resembles “arena1.com” — these may be unrelated to the domain above.