AS23351 — ANSYSNH - Ansys, Inc. - Lebanon NH

AS23351 announces 1 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

The AS handle ANSYSNH is held by Ansys, Inc.

What it's used for

• The address space carries corporate infrastructure for Ansys, an American multinational company that develops CAE and multiphysics engineering simulation software.
• The inventory consists of a single IPv4 prefix, 204.10.84.0/22, totaling 1024 addresses, with no IPv6 prefixes announced.
• With only 2 observed neighbours, the low neighbour count relative to the address block indicates an internal corporate estate rather than a transit or access network.

Notable

• The RDAP registrant for the prefix 204.10.84.0/22 is listed as Synopsys Inc. with the netname ANSYS-NH-NET, while the registry holder is Ansys, Inc.
• Ansys was acquired by Synopsys, Inc. in 2024, which explains the registrant name change in the address space records.
• The address inventory is a single contiguous /22 block, consistent with a dedicated corporate network segment.

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

Announced prefixes

• 204.10.84.0/22

Upstream networks

• AS17356 Vermont Telephone Company, Inc.
• AS701 Verizon Business

Adjacent networks

• AS17356 Vermont Telephone Company, Inc.
• AS701 Verizon Business

Routing security

• RPKI: 0 valid, 0 invalid and 1 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 1 route objects.
• Listed in as-sets: AS-63529-AS-IMPORT-AS6939, AS-GBLX, AS-HURRICANE, AS-SUNGARDASNA, AS-TRANSROUTE-SPEC, AS-WINDSTREAM-CUST, AS17356:AS-ANSYS, AS17356:AS-ANSYS.