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Domain footprint: citigroup.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: 104.96.178.165 → Akamai Technologies, Inc. · 104.94.222.171 → Akamai Technologies, Inc.
Mail: mx-a.mail.citi.com → Proofpoint, Inc. · mx-b.mail.citi.com → Proofpoint, Inc.
SPF sends via: spf-00123c01.pphosted.com

Separately, 20 organisations whose name resembles “citigroup.com” — these may be unrelated to the domain above.

  1. CITIGROUP INC. 228 netblocks across 5 companies in this group Corporate group
  2. Citigroup N.A. 6 netblocks Routing
  3. HONGDOU-GROUP-COM 3 netblocks · APNIC registry Routing
  4. CITIGROUP-EMEA 2 netblocks · United States Routing
  5. B-NIKO-GROUP-COM 2 netblocks · United Kingdom Routing
  6. Citigroup Services and Technology Limited 1 netblock Routing
  7. NET-GB-CITIGROUP 1 netblock · RIPE registry Routing
  8. CITIGROUP-SG 1 netblock · APNIC registry Routing
  9. Net-DE-Citigroup-Global-Markets 1 netblock · RIPE registry Routing
  10. GB-CITIGROUP-CITIGROUP-CENTRE-CAP1 1 netblock · RIPE registry Handle
  11. WEIWEIGROUP-COM 1 netblock · APNIC registry Routing
  12. chongqigroup-com 1 netblock · APNIC registry Routing
  13. QUANZHOU-ORE-GROUP-COM 1 netblock · APNIC registry Routing
  14. YIJIANGROUP-COM 1 netblock · APNIC registry Routing
  15. Solico-group-com 1 netblock · RIPE registry Routing
  16. XUGONGGROUP-COM 1 netblock · APNIC registry Routing
  17. LangchaoGroup-com 1 netblock · APNIC registry Routing
  18. centurygroup-com-tj 1 netblock · APNIC registry Routing
  19. NANJING-RED-SUN-GROUP-COM 1 netblock · APNIC registry Routing
  20. YUEXING-GROUP-COM 1 netblock · APNIC registry Routing