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AS109

CISCO SYSTEMS, INC.

ARIN US active Announced
More ASNs in the United States →
Organization
CISCO SYSTEMS, INC.
CISCOSYSTEMS
Registered
May 06, 1987
39 years ago
IPv4 Prefixes
96
1.1M addresses
IPv6 Prefixes
47
65,536 × /48
BGP Neighbours
18
18 upstream/peer · 0 downstream

Registration

AS Number AS109 AS Name CISCOSYSTEMS Organization CISCO SYSTEMS, INC. Organization ID CS-2831 Address 251 LITTLE FALLS DRIVE, WILMINGTON, DE, 19808, United States Country United States (US) Registry ARIN Allocated May 06, 1987 Record Created May 06, 1987 Last Updated Sep 12, 2023 Status
active
WHOIS Server whois.arin.net AS Description CISCOSYSTEMS - CISCO SYSTEMS, INC., US Abuse Email [email protected] Abuse Phone +1-408-527-3227

IPv4 Prefixes

96 prefixes · 1.1M addresses · 31 top-level Routing data as of 2026-10-07 16:00 UTC

12.0.0.0/8 · 3 prefixes · 3,584 addresses
PrefixRangeAddresses
12.5.186.0/2312.5.186.0 – 12.5.187.255512
12.19.88.0/2112.19.88.0 – 12.19.95.2552,048
12.159.148.0/2212.159.148.0 – 12.159.151.2551,024
64.0.0.0/8 · 26 prefixes · 327,680 addresses
PrefixRangeAddresses
64.100.0.0/1664.100.0.0 – 64.100.255.25565,536
64.101.0.0/1864.101.0.0 – 64.101.63.25516,384
64.101.64.0/1864.101.64.0 – 64.101.127.25516,384
64.101.96.0/1964.101.96.0 – 64.101.127.2558,192
64.101.128.0/1864.101.128.0 – 64.101.191.25516,384
64.101.192.0/1964.101.192.0 – 64.101.223.2558,192
64.101.224.0/1964.101.224.0 – 64.101.255.2558,192
64.102.0.0/1664.102.0.0 – 64.102.255.25565,536
64.102.249.0/2464.102.249.0 – 64.102.249.255256
64.103.0.0/1664.103.0.0 – 64.103.255.25565,536
64.103.0.0/1764.103.0.0 – 64.103.127.25532,768
64.103.40.0/2164.103.40.0 – 64.103.47.2552,048
64.103.48.0/2164.103.48.0 – 64.103.55.2552,048
64.103.64.0/1964.103.64.0 – 64.103.95.2558,192
64.103.96.0/2064.103.96.0 – 64.103.111.2554,096
64.103.128.0/1764.103.128.0 – 64.103.255.25532,768
64.104.0.0/1664.104.0.0 – 64.104.255.25565,536
64.104.0.0/1864.104.0.0 – 64.104.63.25516,384
64.104.64.0/1964.104.64.0 – 64.104.95.2558,192
64.104.96.0/1964.104.96.0 – 64.104.127.2558,192
64.104.124.0/2464.104.124.0 – 64.104.124.255256
64.104.128.0/1964.104.128.0 – 64.104.159.2558,192
64.104.160.0/1964.104.160.0 – 64.104.191.2558,192
64.104.192.0/1864.104.192.0 – 64.104.255.25516,384
64.104.204.0/2364.104.204.0 – 64.104.205.255512
64.104.206.0/2364.104.206.0 – 64.104.207.255512
66.0.0.0/8 · 1 prefix · 4,096 addresses
PrefixRangeAddresses
66.187.208.0/2066.187.208.0 – 66.187.223.2554,096
72.0.0.0/8 · 12 prefixes · 65,536 addresses
PrefixRangeAddresses
72.163.0.0/1672.163.0.0 – 72.163.255.25565,536
72.163.0.0/1872.163.0.0 – 72.163.63.25516,384
72.163.4.0/2472.163.4.0 – 72.163.4.255256
72.163.7.0/2472.163.7.0 – 72.163.7.255256
72.163.64.0/2072.163.64.0 – 72.163.79.2554,096
72.163.80.0/2072.163.80.0 – 72.163.95.2554,096
72.163.96.0/1972.163.96.0 – 72.163.127.2558,192
72.163.128.0/1872.163.128.0 – 72.163.191.25516,384
72.163.192.0/1972.163.192.0 – 72.163.223.2558,192
72.163.224.0/1972.163.224.0 – 72.163.255.2558,192
72.163.240.0/2372.163.240.0 – 72.163.241.255512
72.163.248.0/2272.163.248.0 – 72.163.251.2551,024
103.0.0.0/8 · 1 prefix · 1,024 addresses
PrefixRangeAddresses
103.60.32.0/22103.60.32.0 – 103.60.35.2551,024
111.0.0.0/8 · 1 prefix · 1,024 addresses
PrefixRangeAddresses
111.223.8.0/22111.223.8.0 – 111.223.11.2551,024
128.0.0.0/8 · 18 prefixes · 65,536 addresses
PrefixRangeAddresses
128.107.0.0/16128.107.0.0 – 128.107.255.25565,536
128.107.0.0/23128.107.0.0 – 128.107.1.255512
128.107.2.0/23128.107.2.0 – 128.107.3.255512
128.107.4.0/23128.107.4.0 – 128.107.5.255512
128.107.6.0/23128.107.6.0 – 128.107.7.255512
128.107.8.0/23128.107.8.0 – 128.107.9.255512
128.107.10.0/23128.107.10.0 – 128.107.11.255512
128.107.12.0/23128.107.12.0 – 128.107.13.255512
128.107.14.0/23128.107.14.0 – 128.107.15.255512
128.107.18.0/23128.107.18.0 – 128.107.19.255512
128.107.20.0/23128.107.20.0 – 128.107.21.255512
128.107.22.0/23128.107.22.0 – 128.107.23.255512
128.107.24.0/23128.107.24.0 – 128.107.25.255512
128.107.34.0/23128.107.34.0 – 128.107.35.255512
128.107.36.0/23128.107.36.0 – 128.107.37.255512
128.107.38.0/23128.107.38.0 – 128.107.39.255512
128.107.40.0/23128.107.40.0 – 128.107.41.255512
128.107.54.0/23128.107.54.0 – 128.107.55.255512
144.0.0.0/8 · 1 prefix · 65,536 addresses
PrefixRangeAddresses
144.254.0.0/16144.254.0.0 – 144.254.255.25565,536
161.0.0.0/8 · 1 prefix · 65,536 addresses
PrefixRangeAddresses
161.44.0.0/16161.44.0.0 – 161.44.255.25565,536
171.0.0.0/8 · 1 prefix · 262,144 addresses
PrefixRangeAddresses
171.68.0.0/14171.68.0.0 – 171.71.255.255262,144
173.0.0.0/8 · 20 prefixes · 262,144 addresses
PrefixRangeAddresses
173.36.0.0/14173.36.0.0 – 173.39.255.255262,144
173.36.0.0/17173.36.0.0 – 173.36.127.25532,768
173.37.0.0/20173.37.0.0 – 173.37.15.2554,096
173.37.16.0/20173.37.16.0 – 173.37.31.2554,096
173.37.64.0/18173.37.64.0 – 173.37.127.25516,384
173.37.128.0/19173.37.128.0 – 173.37.159.2558,192
173.37.145.0/24173.37.145.0 – 173.37.145.255256
173.37.160.0/19173.37.160.0 – 173.37.191.2558,192
173.37.192.0/18173.37.192.0 – 173.37.255.25516,384
173.38.0.0/17173.38.0.0 – 173.38.127.25532,768
173.38.128.0/17173.38.128.0 – 173.38.255.25532,768
173.39.0.0/18173.39.0.0 – 173.39.63.25516,384
173.39.64.0/19173.39.64.0 – 173.39.95.2558,192
173.39.96.0/19173.39.96.0 – 173.39.127.2558,192
173.39.128.0/19173.39.128.0 – 173.39.159.2558,192
173.39.144.0/21173.39.144.0 – 173.39.151.2552,048
173.39.152.0/21173.39.152.0 – 173.39.159.2552,048
173.39.160.0/19173.39.160.0 – 173.39.191.2558,192
173.39.192.0/20173.39.192.0 – 173.39.207.2554,096
173.39.200.0/23173.39.200.0 – 173.39.201.255512
192.0.0.0/8 · 6 prefixes · 14,592 addresses
PrefixRangeAddresses
192.118.76.0/22192.118.76.0 – 192.118.79.2551,024
192.118.78.0/23192.118.78.0 – 192.118.79.255512
192.133.192.0/19192.133.192.0 – 192.133.223.2558,192
192.133.224.0/20192.133.224.0 – 192.133.239.2554,096
192.133.240.0/22192.133.240.0 – 192.133.243.2551,024
192.135.250.0/24192.135.250.0 – 192.135.250.255256
198.0.0.0/8 · 2 prefixes · 2,304 addresses
PrefixRangeAddresses
198.133.219.0/24198.133.219.0 – 198.133.219.255256
198.135.0.0/21198.135.0.0 – 198.135.7.2552,048
204.0.0.0/8 · 2 prefixes · 768 addresses
PrefixRangeAddresses
204.69.198.0/23204.69.198.0 – 204.69.199.255512
204.69.200.0/24204.69.200.0 – 204.69.200.255256
216.0.0.0/8 · 1 prefix · 8,192 addresses
PrefixRangeAddresses
216.128.32.0/19216.128.32.0 – 216.128.63.2558,192

BGP Neighbours

18 unique neighbours · 18 upstream/peer · 0 downstream. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries.

Upstream & peer side (18)

Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers.

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS1221ASN-TELSTRA - Telstra Limited4601,035968
AS8551BEZEQ-INTERNATIONAL-AS Bezeq International Ltd.3737920
AS4657STARHUB-INTERNET - StarHub Ltd3716431,083
AS3356LEVEL3 - Level 3 Parent, LLC36311,5781,787
AS6939HURRICANE - Hurricane Electric LLC3306,4775,998
AS9498BBIL-AP - BHARTI Airtel Ltd.2902,4540
AS1680NV-ASN - Cellcom Fixed Line Communication L.P2782801,362
AS4637ASN-TELSTRA-GLOBAL - Telstra Global2741,4281,744
AS17621CNCGROUP-SH - China Unicom Shanghai network2726510
AS701UUNET - Verizon Business263971109
AS4755TATACOMM-AS - TATA Communications formerly VSNL is Leading ISP250212,007
AS4812CHINANET-SH-AP - China Telecom (Group)2411,3790
AS7018ATT-INTERNET4 - AT&T Enterprises, LLC2216364
AS3491PCCWG-APAC-HK - PCCW Global (HK) Ltd.1902,244426
AS7473SINGTEL-AS-AP - Singapore Telecommunications Ltd142374352
AS1299TWELVE99 Arelion Sweden AB1411,072257
AS2764AAPT - AAPT Limited124580114
AS8220COLT COLT Technology Services Group Limited1145649

Raw RDAP Response

{
  "endAutnum": 109,
  "entities": [
    {
      "entities": [
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2026-03-04T11:18:28-05:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2024-02-16T13:57:00-05:00"
            }
          ],
          "handle": "CISCO6-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/CISCO6-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/109"
            },
            {
              "href": "https://whois.arin.net/rest/poc/CISCO6-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/109"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "remarks": [
            {
              "description": [
                "https://sec.cloudapps.cisco.com/security/center/resources/computer_security_incident_response_team_csirt.html"
              ],
              "title": "Registration Comments"
            }
          ],
          "roles": [
            "abuse"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "7025 Kit Creek Road\nResearch Triangle Park\nNC\n27709\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "Cisco CSIRT"
              ],
              [
                "org",
                {},
                "text",
                "Cisco Systems, Inc."
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-408-527-3227"
              ]
            ]
          ]
        },
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2026-03-25T09:12:27-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2012-05-20T21:54:21-04:00"
            }
          ],
          "handle": "GATC-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/GATC-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/109"
            },
            {
              "href": "https://whois.arin.net/rest/poc/GATC-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/109"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "remarks": [
            {
              "description": [
                "www.cisco.com"
              ],
              "title": "Registration Comments"
            }
          ],
          "roles": [
            "technical",
            "administrative",
            "noc"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "170 West Tasman Dr.\nSan Jose\nCA\n95134\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "GIS ARIN Technical Contact"
              ],
              [
                "org",
                {},
                "text",
                "Cisco Systems"
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-408-526-8888"
              ]
            ]
          ]
        }
      ],
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2024-02-16T14:02:36-05:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2023-06-07T14:10:05-04:00"
        }
      ],
      "handle": "CS-2831",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/CS-2831",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/109"
        },
        {
          "href": "https://whois.arin.net/rest/org/CS-2831",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/109"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "CISCO SYSTEMS, INC."
          ],
          [
            "adr",
            {
              "label": "251 LITTLE FALLS DRIVE\nWILMINGTON\nDE\n19808\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "last changed",
      "eventDate": "2023-09-12T15:59:44-04:00"
    },
    {
      "eventAction": "registration",
      "eventDate": "1987-05-06T00:00:00-04:00"
    }
  ],
  "handle": "AS109",
  "links": [
    {
      "href": "https://rdap.arin.net/registry/autnum/109",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.arin.net/registry/autnum/109"
    },
    {
      "href": "https://whois.arin.net/rest/asn/AS109",
      "rel": "alternate",
      "type": "application/xml",
      "value": "https://rdap.arin.net/registry/autnum/109"
    }
  ],
  "name": "CISCOSYSTEMS",
  "notices": [
    {
      "description": [
        "By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
      ],
      "links": [
        {
          "href": "https://www.arin.net/resources/registry/whois/tou/",
          "rel": "terms-of-service",
          "type": "text/html",
          "value": "https://rdap.arin.net/registry/autnum/109"
        }
      ],
      "title": "Terms of Service"
    },
    {
      "description": [
        "If you see inaccuracies in the results, please visit: "
      ],
      "links": [
        {
          "href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
          "rel": "inaccuracy-report",
          "type": "text/html",
          "value": "https://rdap.arin.net/registry/autnum/109"
        }
      ],
      "title": "Whois Inaccuracy Reporting"
    },
    {
      "description": [
        "Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
      ],
      "title": "Copyright Notice"
    }
  ],
  "objectClassName": "autnum",
  "port43": "whois.arin.net",
  "rdapConformance": [
    "nro_rdap_profile_0",
    "rdap_level_0",
    "nro_rdap_profile_asn_flat_0"
  ],
  "startAutnum": 109,
  "status": [
    "active"
  ]
}

Contact details of private individuals are redacted.