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Domain footprint: jumpjump.io
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:
inbound-smtp.us-east-1.amazonaws.com → Amazon Web Services, Inc.
SPF sends via:
amazonses.com
Separately, 3 organisations whose name resembles “jumpjump.io” — these may be unrelated to the domain above.