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AS400571 CDNS | IPGeolocation.io

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

CDNS cadence.com

US 2 Routes

AS Data

AS400571

AS400571 – CDNS

AS Number	400571
AS Name	CADENCE-ATL
Organization	CDNS(cds-370)
Country	US
Website	cadence.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2022-03-28

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Use ASN data for AS400571 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
158.140.0.0/24	AS400571	CDNS	Cadence Design Systems, Inc.	256
158.140.7.0/24	AS400571	CDNS	Cadence Design Systems, Inc.	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:       400571
ASName:         CADENCE-ATL
ASHandle:       AS400571
RegDate:        2022-03-28
Updated:        2022-03-28    
Ref:            https://rdap.arin.net/registry/autnum/400571


OrgName:        CDNS
OrgId:          CDS-370
Address:        2655 Seely Ave
Address:        Building 7
City:           San Jose
StateProv:      CA
PostalCode:     95134
Country:        US
RegDate:        2018-03-22
Updated:        2018-03-22
Ref:            https://rdap.arin.net/registry/entity/CDS-370


OrgNOCHandle: HOSTM2078-ARIN
OrgNOCName:   Hostmaster
OrgNOCPhone:  +1-408-943-1234 
OrgNOCEmail:  isp-notification@cadence.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/HOSTM2078-ARIN

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

Peers

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US
AS7725	Comcast Cable Communications, LLC	US
AS6461	Zayo Bandwidth	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US
AS7725	Comcast Cable Communications, LLC	US
AS6461	Zayo Bandwidth	US

Frequently Asked Questions

What is ASN AS400571?

ASN AS400571 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS400571?

AS400571 is listed under CDNS.

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.