Autonomous system
AS11829 CADENCE
Unclassified ARIN
Summary
Cadence Design Systems, Inc.
enterprise legacy
CADENCE is the corporate network of Cadence Design Systems, the San Jose electronic-design-automation company whose tools are used to design chips and printed circuit boards. This is an enterprise AS, not a service provider.
What it's used for
- Internet-facing corporate infrastructure for Cadence itself. RIS sees six IPv4 prefixes carrying roughly 1,536 addresses, no IPv6, and just three observed neighbours: the shape of a company that buys transit rather than one that sells it.
- Reverse DNS on the sampled addresses lands squarely in
cadence.com(hostnames such as an FTP server and a numbered internal host), so the space is serving Cadence's own systems rather than any third-party customer base.
Notable
- The prefix registrations look untidier than the network is. Only three of the six /24s register to Cadence itself; the rest sit under a legacy UUNET/Verizon Business customer block and under two other small companies. That is the ordinary residue of a long-lived enterprise inventory. Provider-assigned space and blocks inherited through corporate history are both normal here, and none of the usual leasing tells are present: everything is ARIN space, the routing is first-party, and the rDNS is Cadence's own.
Interesting
- Address counts this small are typical of large software firms. The bulk of a company like Cadence's compute now sits behind cloud and SaaS providers, so the AS it announces reflects its edge, not its size.
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 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 6 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS11829- Registry name
- CADENCE
- Registrant
- Cadence Design Systems, Inc.
- Abuse contact
- hostmaster@cadence.com
- Registered
- 1999-01-05
- Last changed
- 2006-01-12
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS11829
- ASPA
- no ASPA record
- IRR
- 17% registered · 1 of 6 announcements
- Route objects
- 1 naming AS11829
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 1,782 prefixes, as published 2026-10-16. 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