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AS2381

WiscNet

ARIN US active Announced
More ASNs in the United States →
Organization
WiscNet
WISCNET1-AS
Registered
Feb 03, 1993
33 years ago
IPv4 Prefixes
37
515,328 addresses
IPv6 Prefixes
2
65,792 × /48
BGP Neighbours
52
12 upstream/peer · 34 downstream · 6 collector-only

Registration

AS Number AS2381 AS Name WISCNET1-AS Organization WiscNet Organization ID WISC-Z Address 605 Science Drive, Madison, WI, 53711, United States Country United States (US) Registry ARIN Allocated Feb 03, 1993 Record Created Feb 03, 1993 Last Updated Feb 28, 2024 Status
active
WHOIS Server whois.arin.net AS Description WISCNET1-AS - WiscNet, US Abuse Email [email protected] Abuse Phone +1-608-442-6761;ext2

IPv4 Prefixes

37 prefixes · 515,328 addresses · 33 top-level Routing data as of 2026-10-07 08:00 UTC

PrefixRangeAddresses
64.189.15.0/2464.189.15.0 – 64.189.15.255256
140.104.0.0/16140.104.0.0 – 140.104.255.25565,536
140.189.0.0/16140.189.0.0 – 140.189.255.25565,536
143.109.64.0/19143.109.64.0 – 143.109.95.2558,192
143.109.192.0/19143.109.192.0 – 143.109.223.2558,192
144.89.0.0/18144.89.0.0 – 144.89.63.25516,384
148.59.44.0/24148.59.44.0 – 148.59.44.255256
160.32.0.0/22160.32.0.0 – 160.32.3.2551,024
165.128.0.0/16165.128.0.0 – 165.128.255.25565,536
170.125.0.0/16170.125.0.0 – 170.125.255.25565,536
170.125.238.0/23170.125.238.0 – 170.125.239.255512
192.156.230.0/24192.156.230.0 – 192.156.230.255256
192.206.48.0/24192.206.48.0 – 192.206.48.255256
198.150.0.0/16198.150.0.0 – 198.150.255.25565,536
199.197.64.0/18199.197.64.0 – 199.197.127.25516,384
199.233.44.0/23199.233.44.0 – 199.233.45.255512
199.233.44.0/24199.233.44.0 – 199.233.44.255256
199.233.45.0/24199.233.45.0 – 199.233.45.255256
199.233.84.0/24199.233.84.0 – 199.233.84.255256
199.233.86.0/24199.233.86.0 – 199.233.86.255256
199.233.142.0/24199.233.142.0 – 199.233.142.255256
199.242.176.0/24199.242.176.0 – 199.242.176.255256
199.248.186.0/24199.248.186.0 – 199.248.186.255256
204.128.233.0/24204.128.233.0 – 204.128.233.255256
204.128.234.0/24204.128.234.0 – 204.128.234.255256
204.128.235.0/24204.128.235.0 – 204.128.235.255256
204.128.236.0/24204.128.236.0 – 204.128.236.255256
204.128.237.0/24204.128.237.0 – 204.128.237.255256
204.128.238.0/24204.128.238.0 – 204.128.238.255256
204.128.240.0/24204.128.240.0 – 204.128.240.255256
204.128.241.0/24204.128.241.0 – 204.128.241.255256
204.128.242.0/24204.128.242.0 – 204.128.242.255256
204.145.232.0/24204.145.232.0 – 204.145.232.255256
205.213.0.0/16205.213.0.0 – 205.213.255.25565,536
208.85.28.0/22208.85.28.0 – 208.85.31.2551,024
216.56.0.0/16216.56.0.0 – 216.56.255.25565,536
216.56.252.0/23216.56.252.0 – 216.56.253.255512

IPv6 Prefixes

2 prefixes · 65,792 × /48 Routing data as of 2026-10-07 08:00 UTC

PrefixAddresses
2001:4e0::/32296
2620:11f:f000::/40288

BGP Neighbours

52 unique neighbours · 12 upstream/peer · 34 downstream · 6 collector-only. 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 (12)

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
AS6939HURRICANE - Hurricane Electric LLC12,06885,5161,788
AS1299TWELVE99 Arelion Sweden AB1,0444,997155
AS3257GTT-BACKBONE GTT Communications Inc.4692,12196
AS11164INTERNET2-I2PX - Internet23202,335102
AS11537INTERNET2-RESEARCH-EDU - Internet217398934
AS3303SWISSCOM Swisscom (Schweiz) AG14079351
AS137409GSLNETWORKS-AS-AP - GSL Networks Pty LTD11473627
AS8220COLT COLT Technology Services Group Limited582830
AS293ESNET - ESnet301807
AS29838AMC - Atlantic Metro Communications II, Inc.9550
AS286KPN GTT Communications Inc.565
AS32621TCV-511 - Twin City VoIP, Inc.260

Downstream side (34)

Networks seen to the right of this AS in BGP paths — networks whose routes it carries, typically its customers (downstreams).

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS19782INDIANAGIGAPOP - Indiana University3,57421,7520
AS57NL-GIGAPOP - University of Minnesota1,4076,66329
AS3128BRUWS-AS3128 - University of Wisconsin System1,0618,7680
AS47015SHH-SJH - Sacred Heart Hospital5677710
AS11500MSOE-INTERNET - Milwaukee School of Engineering4362,8660
AS25979COMDC-WI - CITY OF MADISON341400375
AS53355CUW-1 - Concordia University Wisconsin3311,161361
AS33503MCW-1-AS - Medical College of Wisconsin3302,322363
AS3676UIOWA-AS - University of Iowa3262,02515
AS22971SVHHSTOSF-NET - ST. VINCENT HOSPITAL OF THE HOSPITAL SISTERS OF THE THIRD ORDER OF ST. FRANCIS2911,0050
AS395963WCAN - WCAN2893,0880
AS40387UI-ICCN - University of Illinois28579721
AS394316ALTRA - Altra Federal Credit Union2856890
AS22066CITY-OF-EAU-CLAIRE - City of Eau Claire2843860
AS22137BCW - Blood Center of Wisconsin, Inc.2843860
AS393257LAWREN-1 - Lawrence University2843860
AS3946739408 - Milwaukee Area Technical College2847720
AS36723WAUKESHA-COUNTY-INTERNET - Waukesha County2836520
AS40347EAUCLAIRE-COUNTY - Eau Claire County2833860
AS64243MPTC - Moraine Park Technical College2833830
AS400632KUSD-ASN-01 - KUSD2833840
AS401492WINDING-RIVERS-LIBRARY-SYSTEM - Winding Rivers Library System2833860
AS53599KENOSHA-COUNTY-WI - Kenosha County2823830
AS2041STNORBERTCOLLEGE - St. Norbert College2817600
AS14192CARTHA-ASN - Carthage College2811,5440
AS23301WISC-INVESTMENT-BOARD - State of Wisconsin Investment Board2393270
AS103NWU-AS - Northwestern University2345,917218
AS3136STATE-OF-WISCONSIN-AS1 - State of WI Dept. of Administration2031,624251
AS1736MU-AS - Marquette University18218,8880
AS396939AANIIN - Fond du Lac Band of Lake Superior Chippewa1812490
AS55133ST-CROIX-CENTRAL-SCHOOL-DISTRICT - St. Croix Central School District1572190
AS26415VERISIGN-INC - VeriSign Global Registry Services71414
AS46103UWW-EDU-ASN - University of Wisconsin Whitewater332
AS7386ILLINOIS-STATE-UNIV - Illinois State University110

Collector-only (6)

Networks seen to the left of this AS only when they peer directly with a RIPE RIS route collector, so the adjacency may be an artefact of that peering; many of them also appear on the downstream side.

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS24482SGGS-AS-AP - SG.GS931,44372
AS19151BBO-1 - BroadbandONE, LLC3542514
AS49544i3Dnet i3D.net B.V3242412
AS35280F5 F5 Networks SARL271060
AS36236NETACTUATE - NetActuate, Inc271056
AS1828UNITAS - Unitas Global607

Raw RDAP Response

{
  "endAutnum": 2381,
  "entities": [
    {
      "entities": [
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2026-03-05T12:44:36-05:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2024-02-28T08:57:26-05:00"
            }
          ],
          "handle": "ABUSE8958-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/ABUSE8958-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/2381"
            },
            {
              "href": "https://whois.arin.net/rest/poc/ABUSE8958-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/2381"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "abuse"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "605 Science Dr\nMadison\nWI\n53711\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "Abuse"
              ],
              [
                "org",
                {},
                "text",
                "WiscNet"
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-608-442-6761;ext2"
              ]
            ]
          ]
        },
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2025-12-16T14:46:12-05:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "1997-09-17T10:34:04-04:00"
            }
          ],
          "handle": "WN29-ORG-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/WN29-ORG-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/2381"
            },
            {
              "href": "https://whois.arin.net/rest/poc/WN29-ORG-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/2381"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "administrative",
            "technical"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "605 Science Drive\nMadison\nWI\n53711\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "WiscNet NIC"
              ],
              [
                "org",
                {},
                "text",
                "WiscNet"
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-608-442-6761;ext2"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "fax"
                  ]
                },
                "text",
                "+1-608-210-3979"
              ]
            ]
          ]
        }
      ],
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2024-02-28T09:04:09-05:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2022-08-01T09:41:38-04:00"
        }
      ],
      "handle": "WISC-Z",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/WISC-Z",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/2381"
        },
        {
          "href": "https://whois.arin.net/rest/org/WISC-Z",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/2381"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "WiscNet"
          ],
          [
            "adr",
            {
              "label": "605 Science Drive\nMadison\nWI\n53711\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ]
        ]
      ]
    },
    {
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2026-03-05T12:44:36-05:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2024-02-28T08:57:26-05:00"
        }
      ],
      "handle": "ABUSE8958-ARIN",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/ABUSE8958-ARIN",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/2381"
        },
        {
          "href": "https://whois.arin.net/rest/poc/ABUSE8958-ARIN",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/2381"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "abuse"
      ],
      "status": [
        "validated"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "adr",
            {
              "label": "605 Science Dr\nMadison\nWI\n53711\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "fn",
            {},
            "text",
            "Abuse"
          ],
          [
            "org",
            {},
            "text",
            "WiscNet"
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ],
          [
            "tel",
            {
              "type": [
                "work",
                "voice"
              ]
            },
            "text",
            "+1-608-442-6761;ext2"
          ]
        ]
      ]
    },
    {
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2025-12-16T14:46:12-05:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "1997-09-17T10:34:04-04:00"
        }
      ],
      "handle": "WN29-ORG-ARIN",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/WN29-ORG-ARIN",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/2381"
        },
        {
          "href": "https://whois.arin.net/rest/poc/WN29-ORG-ARIN",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/2381"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "technical"
      ],
      "status": [
        "validated"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "adr",
            {
              "label": "605 Science Drive\nMadison\nWI\n53711\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "fn",
            {},
            "text",
            "WiscNet NIC"
          ],
          [
            "org",
            {},
            "text",
            "WiscNet"
          ],
          [
            "kind",
            {},
            "text",
            "group"
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ],
          [
            "tel",
            {
              "type": [
                "work",
                "voice"
              ]
            },
            "text",
            "+1-608-442-6761;ext2"
          ],
          [
            "tel",
            {
              "type": [
                "work",
                "fax"
              ]
            },
            "text",
            "+1-608-210-3979"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "last changed",
      "eventDate": "2024-02-28T09:07:44-05:00"
    },
    {
      "eventAction": "registration",
      "eventDate": "1993-02-03T00:00:00-05:00"
    }
  ],
  "handle": "AS2381",
  "links": [
    {
      "href": "https://rdap.arin.net/registry/autnum/2381",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.arin.net/registry/autnum/2381"
    },
    {
      "href": "https://whois.arin.net/rest/asn/AS2381",
      "rel": "alternate",
      "type": "application/xml",
      "value": "https://rdap.arin.net/registry/autnum/2381"
    }
  ],
  "name": "WISCNET1-AS",
  "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/2381"
        }
      ],
      "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/2381"
        }
      ],
      "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": 2381,
  "status": [
    "active"
  ]
}

Contact details of private individuals are redacted.