Autonomous system
AS23351 ANSYSNH
Unclassified ARIN
Summary
Ansys
business simulation engineering corporate
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 1.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS23351- Registry name
- ANSYSNH
- Registrant
- Synopsys Inc.
- Abuse contact
- network-core@synopsys.com
- Registered
- 2002-03-04
- Last changed
- 2026-04-14
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS23351
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 1 announcements 1 other origin
- Route objects
- 0 naming AS23351
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,779 prefixes, as published 2026-10-22. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere