ASN AS109 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS109?

AS109 is listed under Cisco Systems, Inc..

What do peers, upstreams, and downstreams mean in ASN data?

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 shown for an ASN?

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

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS109 Cisco Systems, Inc. | IPGeolocation.io

Cisco Systems, Inc. cisco.com

US 141 Routes

AS Data

AS109

AS109 – Cisco Systems, Inc.

AS Number	109
AS Name	CISCOSYSTEMS
Organization	Cisco Systems, Inc. (cs-2831)
Country	US
Website	cisco.com
Number of IPv4 Routes	95
Number of IPv6 Routes	46
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1987-05-06

ASN Intelligence API for production workflows

Use ASN data for AS109 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
64.103.96.0/20	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	4096
128.107.0.0/16	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	65536
173.39.152.0/21	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	2048
2001:420:91::/48	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~1×10²⁴
128.107.14.0/23	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	512
173.39.96.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
192.133.192.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
64.100.0.0/16	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	65536
2001:420:c134::/46	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~5×10²⁴
173.38.128.0/17	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	32768
128.107.6.0/23	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	512
2001:420:8d::/48	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~1×10²⁴
192.135.250.0/24	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	256
2001:420:c0f8::/46	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~5×10²⁴
2001:420:c0cc::/46	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~5×10²⁴
72.163.128.0/18	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	16384
198.135.0.0/21	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	2048
2001:420::/32	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~79×10²⁷
72.163.0.0/16	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	65536
2001:420:5800::/39	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~619×10²⁴
173.38.0.0/17	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	32768
64.101.192.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
64.104.160.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
2001:420:1000::/40	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~309×10²⁴
173.37.145.0/24	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	256
173.36.0.0/17	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	32768
2001:420:8a::/48	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~1×10²⁴
2001:420:5200::/39	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~619×10²⁴
192.118.76.0/22	AS109	Cisco Systems, Inc.	Cisco Systems Israel Ltd.	1024
2001:420:5000::/39	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~619×10²⁴
64.104.128.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
2001:420:c0d4::/46	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~5×10²⁴
64.103.0.0/16	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	65536
64.101.128.0/18	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	16384
216.128.32.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
64.104.64.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
64.104.0.0/18	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	16384
2001:420:c0c4::/46	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~5×10²⁴
12.19.88.0/21	AS109	Cisco Systems, Inc.	AT&T Enterprises, LLC	2048
128.107.22.0/23	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	512
173.37.64.0/18	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	16384
64.101.96.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
173.39.128.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
2001:420:5e00::/39	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~619×10²⁴
64.104.192.0/18	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	16384
2001:420:c0e0::/46	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~5×10²⁴
173.37.0.0/20	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	4096
72.163.192.0/19	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	8192
2001:420:5a00::/39	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~619×10²⁴
111.223.8.0/22	AS109	Cisco Systems, Inc.	Cisco Systems China Networking Technology Co., Ltd.	1024
2001:420:4480::/45	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~1×10²⁷
2001:420:1200::/41	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~155×10²⁴
128.107.10.0/23	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	512
2001:420:92::/48	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~1×10²⁴
2001:420:c138::/46	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	~5×10²⁴
12.159.148.0/22	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	1024
173.37.16.0/20	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	4096
72.163.4.0/24	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	256
192.133.224.0/20	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	4096
72.163.80.0/20	AS109	Cisco Systems, Inc.	Cisco Systems, Inc.	4096

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:       109
ASName:         CISCOSYSTEMS
ASHandle:       AS109
RegDate:        1987-05-06
Updated:        2023-09-12
Ref:            https://rdap.arin.net/registry/autnum/109


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:  cidr-block-admins@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:  cidr-block-admins@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

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "109",
    "as_handle" : "AS109",
    "as_name" : "CISCOSYSTEMS",
    "tech_contacts" : [ "GATC-ARIN" ],
    "abuse_contacts" : [ "CISCO6-ARIN" ],
    "date_created" : "1987-05-06",
    "date_updated" : "2023-09-12",
    "source" : "https://rdap.arin.net/registry/autnum/109"
  } ],
  "organization" : {
    "handle" : "CS-2831",
    "name" : "CISCO SYSTEMS, INC.",
    "address" : [ "251 LITTLE FALLS DRIVE", "WILMINGTON", "DE", "19808", "US" ],
    "street" : "Little Falls Drive",
    "city" : "Wilmington",
    "state" : "DE",
    "zip_code" : "19808",
    "country" : [ "US" ],
    "date_created" : "2023-06-07",
    "date_updated" : "2024-02-16",
    "source" : "https://rdap.arin.net/registry/entity/CS-2831",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "GATC-ARIN",
    "name" : "GIS ARIN Technical Contact",
    "email" : [ "cidr-block-admins@cisco.com" ],
    "phone" : [ "+1-408-526-8888" ],
    "source" : "https://rdap.arin.net/registry/entity/GATC-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "CISCO6-ARIN",
    "name" : "Cisco CSIRT",
    "email" : [ "csirt-notify@cisco.com" ],
    "phone" : [ "+1-408-527-3227" ],
    "source" : "https://rdap.arin.net/registry/entity/CISCO6-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS1680	Cellcom Fixed Line Communication L.P	IL
AS7018	AT&T Enterprises, LLC	US
AS9498	Bharti Airtel Limited	IN
AS8220	COLT Technology Services Group Limited	GB
AS2764	AAPT Limited	AU
AS17621	China Unicom Shanghai network	CN
AS6939	Hurricane Electric LLC	US
AS11164	Internet2	US
AS7473	Singapore Telecommunications SINGTEL Internet Exchange	SG
AS8551	Bezeqint Internet Backbone	IL
AS1221	Telstra Limited	AU
AS4812	Shanghai Telecom Company	CN
AS1299	Arelion Sweden AB	SE
AS3491	PCCW Global HK Limited	HK
AS4657	Starhub Ltd.	SG
AS4637	Telstra International Limited	HK
AS3356	Level 3 Parent, LLC	US
AS5713	SAIX NET	ZA
AS701	Verizon Business	US
AS4755	Tata Communications Limited	IN

Upstreams

AS Number	Description	Country
AS1680	Cellcom Fixed Line Communication L.P	IL
AS7018	AT&T Enterprises, LLC	US
AS9498	Bharti Airtel Limited	IN
AS8220	COLT Technology Services Group Limited	GB
AS2764	AAPT Limited	AU
AS17621	China Unicom Shanghai network	CN
AS6939	Hurricane Electric LLC	US
AS7473	Singapore Telecommunications SINGTEL Internet Exchange	SG
AS8551	Bezeqint Internet Backbone	IL
AS1221	Telstra Limited	AU
AS4812	Shanghai Telecom Company	CN
AS1299	Arelion Sweden AB	SE
AS3491	PCCW Global HK Limited	HK
AS4657	Starhub Ltd.	SG
AS4637	Telstra International Limited	HK
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US
AS4755	Tata Communications Limited	IN

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