Dashboard / IP Lookup

204.128.236.0

IPv4 ARIN US AS2381
ASN
AS2381
WISCNET1-AS - WiscNet, US
Organization
Milwaukee County Federated Library System
WFBAY-NET
Location
Milwaukee (Westown)
Wisconsin, United States (US)
Hostname
—

Geolocation

United States (US)
Country
United States (US)
Region
Wisconsin
City
Milwaukee (Westown)
Continent
North America
Coordinates
43.0391, -87.9218 View on map ↗

Network Information

IP Range 204.128.236.0 – 204.128.236.255 CIDR 204.128.236.0/24 Network Name WFBAY-NET Handle NET-204-128-236-0-1 Type DIRECT ALLOCATION Parent Network NET-204-0-0-0-0 Organization Milwaukee County Federated Library System Organization ID MCFLS-Z Address 709 N. Eight St., Milwaukee, WI, 53233, United States Country United States (US) Registry ARIN Registered On Feb 23, 1995 Last Updated Dec 15, 2021 Status
active

ASN & Routing

Origin AS AS2381 AS Name WISCNET1-AS - WiscNet, US Announced Prefix 204.128.236.0/24 AS Registry ARIN Prefix Country United States (US) Allocated 1995-02-23 RPKI Origin Not found (no ROA covers this prefix)

Reverse DNS

No PTR record is published for this address.

Abuse Contact

Email [email protected] Phone +1-414-296-6112

Raw RDAP Response

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  "arin_originas0_originautnums": [],
  "cidr0_cidrs": [
    {
      "v4prefix": "204.128.236.0",
      "length": 24
    }
  ],
  "endAddress": "204.128.236.255",
  "entities": [
    {
      "entities": [
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2024-08-19T09:40:58-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "1999-04-12T12:21:35-04:00"
            }
          ],
          "handle": "HTT-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/HTT-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
            },
            {
              "href": "https://whois.arin.net/rest/poc/HTT-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "remarks": [
            {
              "description": [
                "ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-08-19"
              ],
              "title": "Unvalidated POC"
            }
          ],
          "roles": [
            "abuse"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "Milwaukee County Federated Library System\n709 N. Eighth St.\nMilwaukee\nWI\n53233\nUnited States"
                },
                "text",
                [
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                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "Hieu T. Tran"
              ],
              [
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                {},
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                  ""
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              [
                "email",
                {},
                "text",
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              ],
              [
                "tel",
                {
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                },
                "text",
                "+1-414-296-6112"
              ],
              [
                "tel",
                {
                  "type": [
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                    "cell"
                  ]
                },
                "text",
                "+1-414-296-0690"
              ]
            ]
          ]
        },
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2026-09-16T10:47:57-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2026-08-31T17:53:50-04:00"
            }
          ],
          "handle": "MCFLS-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/MCFLS-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
            },
            {
              "href": "https://whois.arin.net/rest/poc/MCFLS-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "technical"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "709 N. 8th Street\nMilwaukee\nWI\n53233\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "MCFLS Administrator"
              ],
              [
                "org",
                {},
                "text",
                "Milwaukee County Federated Library System"
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-414-296-6112"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-414-296-0690"
              ]
            ]
          ]
        },
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2024-08-22T09:00:58-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2024-08-22T08:49:10-04:00"
            }
          ],
          "handle": "HENRY350-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/HENRY350-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
            },
            {
              "href": "https://whois.arin.net/rest/poc/HENRY350-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "remarks": [
            {
              "description": [
                "ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-08-22"
              ],
              "title": "Unvalidated POC"
            }
          ],
          "roles": [
            "technical",
            "administrative"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "fn",
                {},
                "text",
                "REDACTED"
              ],
              [
                "kind",
                {},
                "text",
                "individual"
              ]
            ]
          ]
        }
      ],
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2026-09-24T21:29:04-04:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2009-12-17T09:23:17-05:00"
        }
      ],
      "handle": "MCFLS-Z",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/MCFLS-Z",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
        },
        {
          "href": "https://whois.arin.net/rest/org/MCFLS-Z",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Milwaukee County Federated Library System"
          ],
          [
            "adr",
            {
              "label": "709 N. Eight St.\nMilwaukee\nWI\n53233\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ]
        ]
      ]
    },
    {
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2024-08-19T09:40:58-04:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "1999-04-12T12:21:35-04:00"
        }
      ],
      "handle": "HTT-ARIN",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/HTT-ARIN",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
        },
        {
          "href": "https://whois.arin.net/rest/poc/HTT-ARIN",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "remarks": [
        {
          "description": [
            "ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2025-08-19"
          ],
          "title": "Unvalidated POC"
        }
      ],
      "roles": [
        "technical"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "REDACTED"
          ],
          [
            "kind",
            {},
            "text",
            "individual"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "last changed",
      "eventDate": "2021-12-14T20:28:45-05:00"
    },
    {
      "eventAction": "registration",
      "eventDate": "1995-02-23T00:00:00-05:00"
    }
  ],
  "handle": "NET-204-128-236-0-1",
  "ipVersion": "v4",
  "links": [
    {
      "href": "https://rdap.arin.net/registry/ip/204.128.236.0",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
    },
    {
      "href": "https://whois.arin.net/rest/net/NET-204-128-236-0-1",
      "rel": "alternate",
      "type": "application/xml",
      "value": "https://rdap.arin.net/registry/ip/204.128.236.0"
    }
  ],
  "name": "WFBAY-NET",
  "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/ip/204.128.236.0"
        }
      ],
      "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/ip/204.128.236.0"
        }
      ],
      "title": "Whois Inaccuracy Reporting"
    },
    {
      "description": [
        "Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
      ],
      "title": "Copyright Notice"
    }
  ],
  "objectClassName": "ip network",
  "parentHandle": "NET-204-0-0-0-0",
  "port43": "whois.arin.net",
  "rdapConformance": [
    "nro_rdap_profile_0",
    "rdap_level_0",
    "cidr0",
    "arin_originas0"
  ],
  "startAddress": "204.128.236.0",
  "status": [
    "active"
  ],
  "type": "DIRECT ALLOCATION"
}

Contact details of private individuals are redacted.