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AS23351 Synopsys Inc. | 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

Synopsys Inc. synopsys.com

US 1 Routes

AS Data

AS23351

AS23351 – Synopsys Inc.

AS Number	23351
AS Name	ANSYSNH
Organization	Synopsys Inc. (synops)
Country	US
Website	synopsys.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2002-03-04

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Use ASN data for AS23351 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
204.10.84.0/22	AS23351	Synopsys Inc.	Synopsys Inc.	1024

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:       23351
ASName:         ANSYSNH
ASHandle:       AS23351
RegDate:        2002-03-04
Updated:        2026-04-14
Ref:            https://rdap.arin.net/registry/autnum/23351


OrgName:        Synopsys Inc.
OrgId:          SYNOPS
Address:        675 Almanor Ave
City:           Sunnyvale
StateProv:      CA
PostalCode:     94085
Country:        US
RegDate:        1991-02-28
Updated:        2025-10-22
Ref:            https://rdap.arin.net/registry/entity/SYNOPS


OrgTechHandle: NETWO2400-ARIN
OrgTechName:   NETWORK-TEAM
OrgTechPhone:  +1-650-584-4260 
OrgTechEmail:  network-core@synopsys.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO2400-ARIN

OrgAbuseHandle: NETWO2400-ARIN
OrgAbuseName:   NETWORK-TEAM
OrgAbusePhone:  +1-650-584-4260 
OrgAbuseEmail:  network-core@synopsys.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO2400-ARIN

OrgRoutingHandle: CHAND323-ARIN
OrgRoutingName:   Chandrashekara, Rajashekara 
OrgRoutingPhone:  +09742855547 
OrgRoutingEmail:  rac@synopsys.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CHAND323-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" : "23351",
    "as_handle" : "AS23351",
    "as_name" : "ANSYSNH",
    "tech_contacts" : [ "NETWO2400-ARIN", "CHAND323-ARIN" ],
    "abuse_contacts" : [ "NETWO2400-ARIN" ],
    "date_created" : "2002-03-04",
    "date_updated" : "2026-04-14",
    "source" : "https://rdap.arin.net/registry/autnum/23351"
  } ],
  "organization" : {
    "handle" : "SYNOPS",
    "name" : "Synopsys Inc.",
    "address" : [ "675 Almanor Ave", "Sunnyvale", "CA", "94085", "US" ],
    "street" : "Almanor Ave",
    "city" : "Sunnyvale",
    "state" : "CA",
    "zip_code" : "94085",
    "country" : [ "US" ],
    "date_created" : "1991-02-28",
    "date_updated" : "2025-10-22",
    "source" : "https://rdap.arin.net/registry/entity/SYNOPS",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "NETWO2400-ARIN",
    "name" : "NETWORK-TEAM",
    "email" : [ "network-core@synopsys.com" ],
    "phone" : [ "+1-650-584-4260" ],
    "source" : "https://rdap.arin.net/registry/entity/NETWO2400-ARIN"
  }, {
    "handle" : "CHAND323-ARIN",
    "name" : "Chandrashekara, Rajashekara",
    "email" : [ "rac@synopsys.com" ],
    "phone" : [ "+09742855547" ],
    "source" : "https://rdap.arin.net/registry/entity/CHAND323-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "NETWO2400-ARIN",
    "name" : "NETWORK-TEAM",
    "email" : [ "network-core@synopsys.com" ],
    "phone" : [ "+1-650-584-4260" ],
    "source" : "https://rdap.arin.net/registry/entity/NETWO2400-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS701	Verizon Business/UUnet	US
AS701	Verizon Business	US
AS17356	Vermont Telephone Company, Inc.	US

Upstreams

AS Number	Description	Country
AS701	Verizon Business	US
AS17356	Vermont Telephone Company, Inc.	US

Frequently Asked Questions

What is ASN AS23351?

ASN AS23351 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS23351?

AS23351 is listed under Synopsys 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.