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AS2051 CISCO SYSTEMS, 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.

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CISCO SYSTEMS, INC. cisco.com

US 0 Routes

AS Data

AS2051

AS2051 – CISCO SYSTEMS, INC.

AS Number	2051
AS Name	CISCO-EXT
Organization	CISCO SYSTEMS, INC.(cs-2831)
Country	US
Website	cisco.com
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1992-12-08

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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:       2051
ASName:         CISCO-EXT
ASHandle:       AS2051
RegDate:        1992-12-08
Updated:        2023-09-12    
Ref:            https://rdap.arin.net/registry/autnum/2051


OrgName:        CISCO SYSTEMS, INC.
OrgId:          CS-2831
Address:        251 LITTLE FALLS DRIVE
City:           WILMINGTON
StateProv:      DE
PostalCode:     19808
Country:        US
RegDate:        2023-06-07
Updated:        2024-02-16
Ref:            https://rdap.arin.net/registry/entity/CS-2831


OrgTechHandle: GATC-ARIN
OrgTechName:   GIS ARIN Technical Contact
OrgTechPhone:  +1-408-526-8888 
OrgTechEmail:  arin-tech@cisco.com
OrgTechRef:    https://rdap.arin.net/registry/entity/GATC-ARIN

OrgAbuseHandle: CISCO6-ARIN
OrgAbuseName:   Cisco CSIRT
OrgAbusePhone:  +1-408-527-3227 
OrgAbuseEmail:  csirt-notify@cisco.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CISCO6-ARIN

OrgNOCHandle: GATC-ARIN
OrgNOCName:   GIS ARIN Technical Contact
OrgNOCPhone:  +1-408-526-8888 
OrgNOCEmail:  arin-tech@cisco.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/GATC-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

Frequently Asked Questions

What is ASN AS2051?

ASN AS2051 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS2051?

AS2051 is listed under CISCO 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.