AS25883 — CITIGROUP

AS25883 announces 10 IPv4 prefixes covering 3,584 addresses and 0 IPv6 prefixes.

About this network

The AS handle CITIGROUP is held by Citigroup Inc.

What it's used for

• The address space carries internal corporate infrastructure, evidenced by netnames such as CITICORP-C and CITI-199-67-128-247 registered to Citibank N.A. and Citigroup Inc.
• The inventory consists of 10 IPv4 prefixes announcing 3584 addresses against only 3 observed neighbours, indicating a self-contained corporate estate with minimal external peering.

Notable

• Registrants align with the announcer, listing Citibank N.A. for the majority of prefixes and Citigroup Inc. for the 199.67.180.0/24 block.
• The address inventory is finely subdivided into /23 and /24 blocks, consistent with site-by-site segmentation for a large financial institution.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 192.193.8.0/24
• 192.193.39.0/24
• 192.193.40.0/23
• 192.193.102.0/23
• 192.193.104.0/23
• 192.193.171.0/24
• 192.193.178.0/23
• 192.193.185.0/24
• 192.193.222.0/24
• 199.67.180.0/24

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS701 Verizon Business

Downstream networks

• AS33463 Citigroup Inc.

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS33463 Citigroup Inc.
• AS701 Verizon Business

Routing security

• RPKI: 0 valid, 0 invalid and 14 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.
• Listed in as-sets: AS-EMBRATELNET, AS-UDOS.