AS21326 — OPENNET-SA AT&T OpenNet-Service-AS

AS21326 announces 19 IPv4 prefixes covering 29,440 addresses and 1 IPv6 prefixes.

About this network

The AS handle OPENNET-SA is held by AT&T Global Network Services Nederland B.V.

What it's used for

• The address space carries corporate infrastructure for HP Inc., as evidenced by the netname HP-INTERNET assigned to all major prefixes.
• The AS announces 14848 IPv4 addresses across 15 prefixes and 1 IPv6 prefix, while maintaining only 2 observed neighbours, indicating a dedicated internal corporate estate rather than a transit or access network.

Notable

• Registrants for the largest prefixes are consistently listed as HP Inc., which differs from the current AS holder, AT&T Global Network Services Nederland B.V.
• The address inventory is finely subdivided into multiple /20, /21, /22, /23, and /24 blocks, reflecting site-by-site segmentation typical of a large enterprise network.

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

Announced prefixes

• 15.32.64.0/21
• 15.32.72.0/24
• 15.32.75.0/24
• 15.32.79.0/24
• 15.32.80.0/20
• 15.32.100.0/24
• 15.32.103.0/24
• 15.32.106.0/23
• 15.32.111.0/24
• 15.32.112.0/20
• 15.36.69.0/24
• 15.36.70.0/23
• 15.36.120.0/22
• 15.36.124.0/23
• 15.40.64.0/20
• 15.40.82.0/24
• 15.40.87.0/24
• 15.40.88.0/21
• 15.40.96.0/19
• 2608:c16b:2000::/40

Upstream networks

• AS25888 HP Inc.
• AS306 United States Department of Defense (DoD)

Adjacent networks

• AS25888 HP Inc.
• AS306 United States Department of Defense (DoD)

Routing security

• RPKI: 0 valid, 0 invalid and 8 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 88% of announcements registered; 10 route objects.
• Listed in as-sets: AS-ATTAP, AS-EXPEREO, AS-IGNEMEA, AS18106:AS-TRANSIT, AS18106:AS-TRANSIT, AS3491:AS-CUSTOMERS-AP.