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AS11829 Cadence Design Systems, Inc.

Q: Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

ASN Lookup Tool

Cadence Design Systems, Inc. cadence.com

US 6 Routes

AS Data

AS11829

AS11829 – Cadence Design Systems, Inc.

AS Number	11829
AS Name	CADENCE
Organization	Cadence Design Systems, Inc. (cds-16)
Country	US
Website	cadence.com
Number of IPv4 Routes	6
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1999-01-05

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Use ASN data for AS11829 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
158.140.5.0/24	AS11829	Cadence Design Systems, Inc.	Cadence Design Systems, Inc.	256
199.43.4.0/24	AS11829	Cadence Design Systems, Inc.	UniCAD Canada Ltd.	256
192.190.239.0/24	AS11829	Cadence Design Systems, Inc.	Systems & Networks, Inc.	256
158.140.2.0/24	AS11829	Cadence Design Systems, Inc.	Cadence Design Systems, Inc.	256
158.140.1.0/24	AS11829	Cadence Design Systems, Inc.	Cadence Design Systems, Inc.	256
192.203.56.0/24	AS11829	Cadence Design Systems, Inc.	Verizon Business	256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       11829
ASName:         CADENCE
ASHandle:       AS11829
RegDate:        1999-01-05
Updated:        2006-01-12
Ref:            https://rdap.arin.net/registry/autnum/11829


OrgName:        Cadence Design Systems, Inc.
OrgId:          CDS-16
Address:        2655 Seely Ave
City:           San Jose
StateProv:      CA
PostalCode:     95134
Country:        US
RegDate:        1991-05-01
Updated:        2018-02-14
Ref:            https://rdap.arin.net/registry/entity/CDS-16


OrgTechHandle: HOSTM2078-ARIN
OrgTechName:   Hostmaster
OrgTechPhone:  +1-408-943-1234 
OrgTechEmail:  isp-notification@cadence.com
OrgTechRef:    https://rdap.arin.net/registry/entity/HOSTM2078-ARIN

OrgAbuseHandle: HOSTM2078-ARIN
OrgAbuseName:   Hostmaster
OrgAbusePhone:  +1-408-943-1234 
OrgAbuseEmail:  isp-notification@cadence.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/HOSTM2078-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "11829",
    "as_handle" : "AS11829",
    "as_name" : "CADENCE",
    "tech_contacts" : [ "HOSTM2078-ARIN" ],
    "abuse_contacts" : [ "HOSTM2078-ARIN" ],
    "date_created" : "1999-01-05",
    "date_updated" : "2006-01-12",
    "source" : "https://rdap.arin.net/registry/autnum/11829"
  } ],
  "organization" : {
    "handle" : "CDS-16",
    "name" : "Cadence Design Systems, Inc.",
    "address" : [ "2655 Seely Ave", "San Jose", "CA", "95134", "US" ],
    "street" : "Seely Ave",
    "city" : "San Jose",
    "state" : "CA",
    "zip_code" : "95134",
    "country" : [ "US" ],
    "date_created" : "1991-05-01",
    "date_updated" : "2018-02-14",
    "source" : "https://rdap.arin.net/registry/entity/CDS-16",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "HOSTM2078-ARIN",
    "name" : "Hostmaster",
    "email" : [ "isp-notification@cadence.com" ],
    "phone" : [ "+1-408-943-1234" ],
    "source" : "https://rdap.arin.net/registry/entity/HOSTM2078-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "HOSTM2078-ARIN",
    "name" : "Hostmaster",
    "email" : [ "isp-notification@cadence.com" ],
    "phone" : [ "+1-408-943-1234" ],
    "source" : "https://rdap.arin.net/registry/entity/HOSTM2078-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS701	Verizon Business/UUnet	US
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US

Upstreams

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US

Frequently Asked Questions

What is ASN AS11829?

ASN AS11829 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS11829?

AS11829 is listed under Cadence Design Systems, Inc..

What do peers, upstreams, and downstreams mean?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data included here?

WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access full ASN table data?

This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.