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AS237

Merit Network Inc.

ARIN US active Announced
More ASNs in the United States →
Organization
Merit Network Inc.
MERIT-AS-14
Registered
Sep 12, 1988
38 years ago
IPv4 Prefixes
83
2.2M addresses
IPv6 Prefixes
9
131,091 × /48
BGP Neighbours
46
10 upstream/peer · 35 downstream · 2 collector-only

Registration

AS Number AS237 AS Name MERIT-AS-14 Organization Merit Network Inc. Organization ID MICH-Z Address 880 Technology Dr., Suite B, Ann Arbor, MI, 48108, United States Country United States (US) Registry ARIN Allocated Sep 12, 1988 Record Created Sep 12, 1988 Last Updated Sep 21, 2026 Status
active
WHOIS Server whois.arin.net AS Description MERIT-AS-14 - Merit Network Inc., US Remarks Primary Merit Network ASN Abuse Email [email protected] Abuse Phone +1-734-527-5740

IPv4 Prefixes

83 prefixes · 2.2M addresses · 60 top-level Routing data as of 2026-10-07 08:00 UTC

23.0.0.0/8 · 1 prefix · 256 addresses
PrefixRangeAddresses
23.135.208.0/2423.135.208.0 – 23.135.208.255256
35.0.0.0/8 · 33 prefixes · 1.2M addresses
PrefixRangeAddresses
35.16.0.0/1635.16.0.0 – 35.16.255.25565,536
35.24.0.0/1735.24.0.0 – 35.24.127.25532,768
35.24.128.0/1835.24.128.0 – 35.24.191.25516,384
35.24.192.0/1935.24.192.0 – 35.24.223.2558,192
35.24.224.0/1935.24.224.0 – 35.24.255.2558,192
35.25.0.0/1635.25.0.0 – 35.25.255.25565,536
35.33.0.0/1835.33.0.0 – 35.33.63.25516,384
35.33.5.0/2435.33.5.0 – 35.33.5.255256
35.33.6.0/2435.33.6.0 – 35.33.6.255256
35.33.96.0/1935.33.96.0 – 35.33.127.2558,192
35.34.0.0/1835.34.0.0 – 35.34.63.25516,384
35.37.0.0/1635.37.0.0 – 35.37.255.25565,536
35.38.0.0/1635.38.0.0 – 35.38.255.25565,536
35.39.0.0/1935.39.0.0 – 35.39.31.2558,192
35.39.32.0/1935.39.32.0 – 35.39.63.2558,192
35.39.64.0/1935.39.64.0 – 35.39.95.2558,192
35.39.128.0/1935.39.128.0 – 35.39.159.2558,192
35.39.160.0/1935.39.160.0 – 35.39.191.2558,192
35.39.192.0/1935.39.192.0 – 35.39.223.2558,192
35.39.224.0/1935.39.224.0 – 35.39.255.2558,192
35.40.0.0/1635.40.0.0 – 35.40.255.25565,536
35.46.0.0/1835.46.0.0 – 35.46.63.25516,384
35.46.64.0/1835.46.64.0 – 35.46.127.25516,384
35.50.0.0/1735.50.0.0 – 35.50.127.25532,768
35.50.0.0/1835.50.0.0 – 35.50.63.25516,384
35.50.64.0/1835.50.64.0 – 35.50.127.25516,384
35.58.0.0/1635.58.0.0 – 35.58.255.25565,536
35.62.0.0/1635.62.0.0 – 35.62.255.25565,536
35.63.0.0/1635.63.0.0 – 35.63.255.25565,536
35.64.0.0/1435.64.0.0 – 35.67.255.255262,144
35.68.0.0/1535.68.0.0 – 35.69.255.255131,072
35.70.0.0/1635.70.0.0 – 35.70.255.25565,536
35.71.0.0/1835.71.0.0 – 35.71.63.25516,384
74.0.0.0/8 · 3 prefixes · 512 addresses
PrefixRangeAddresses
74.115.236.0/2374.115.236.0 – 74.115.237.255512
74.115.236.0/2474.115.236.0 – 74.115.236.255256
74.115.237.0/2474.115.237.0 – 74.115.237.255256
141.0.0.0/8 · 13 prefixes · 196,608 addresses
PrefixRangeAddresses
141.210.0.0/16141.210.0.0 – 141.210.255.25565,536
141.210.0.0/17141.210.0.0 – 141.210.127.25532,768
141.210.32.0/19141.210.32.0 – 141.210.63.2558,192
141.210.128.0/17141.210.128.0 – 141.210.255.25532,768
141.210.224.0/19141.210.224.0 – 141.210.255.2558,192
141.217.0.0/16141.217.0.0 – 141.217.255.25565,536
141.218.0.0/16141.218.0.0 – 141.218.255.25565,536
141.218.11.0/24141.218.11.0 – 141.218.11.255256
141.218.203.0/24141.218.203.0 – 141.218.203.255256
141.218.204.0/22141.218.204.0 – 141.218.207.2551,024
141.218.208.0/20141.218.208.0 – 141.218.223.2554,096
141.218.224.0/22141.218.224.0 – 141.218.227.2551,024
141.218.228.0/23141.218.228.0 – 141.218.229.255512
148.0.0.0/8 · 1 prefix · 65,536 addresses
PrefixRangeAddresses
148.61.0.0/16148.61.0.0 – 148.61.255.25565,536
161.0.0.0/8 · 7 prefixes · 65,536 addresses
PrefixRangeAddresses
161.133.0.0/17161.133.0.0 – 161.133.127.25532,768
161.133.2.0/24161.133.2.0 – 161.133.2.255256
161.133.104.0/21161.133.104.0 – 161.133.111.2552,048
161.133.112.0/21161.133.112.0 – 161.133.119.2552,048
161.133.120.0/21161.133.120.0 – 161.133.127.2552,048
161.133.128.0/17161.133.128.0 – 161.133.255.25532,768
161.133.129.0/24161.133.129.0 – 161.133.129.255256
163.0.0.0/8 · 1 prefix · 1,024 addresses
PrefixRangeAddresses
163.253.36.0/22163.253.36.0 – 163.253.39.2551,024
164.0.0.0/8 · 2 prefixes · 65,536 addresses
PrefixRangeAddresses
164.76.0.0/16164.76.0.0 – 164.76.255.25565,536
164.76.160.0/19164.76.160.0 – 164.76.191.2558,192
192.0.0.0/8 · 14 prefixes · 6,400 addresses
PrefixRangeAddresses
192.35.170.0/24192.35.170.0 – 192.35.170.255256
192.41.229.0/24192.41.229.0 – 192.41.229.255256
192.41.232.0/22192.41.232.0 – 192.41.235.2551,024
192.88.242.0/24192.88.242.0 – 192.88.242.255256
192.122.182.0/23192.122.182.0 – 192.122.183.255512
192.122.184.0/21192.122.184.0 – 192.122.191.2552,048
192.122.200.0/24192.122.200.0 – 192.122.200.255256
192.138.137.0/24192.138.137.0 – 192.138.137.255256
192.160.192.0/24192.160.192.0 – 192.160.192.255256
192.160.204.0/24192.160.204.0 – 192.160.204.255256
192.188.100.0/24192.188.100.0 – 192.188.100.255256
192.203.195.0/24192.203.195.0 – 192.203.195.255256
192.245.252.0/24192.245.252.0 – 192.245.252.255256
192.245.254.0/24192.245.254.0 – 192.245.254.255256
198.0.0.0/8 · 3 prefixes · 263,168 addresses
PrefixRangeAddresses
198.17.130.0/23198.17.130.0 – 198.17.131.255512
198.17.132.0/23198.17.132.0 – 198.17.133.255512
198.108.0.0/14198.108.0.0 – 198.111.255.255262,144
204.0.0.0/8 · 2 prefixes · 65,792 addresses
PrefixRangeAddresses
204.38.0.0/16204.38.0.0 – 204.38.255.25565,536
204.39.195.0/24204.39.195.0 – 204.39.195.255256
206.0.0.0/8 · 1 prefix · 256 addresses
PrefixRangeAddresses
206.201.157.0/24206.201.157.0 – 206.201.157.255256
207.0.0.0/8 · 2 prefixes · 262,144 addresses
PrefixRangeAddresses
207.72.0.0/14207.72.0.0 – 207.75.255.255262,144
207.75.164.0/23207.75.164.0 – 207.75.165.255512

IPv6 Prefixes

9 prefixes · 131,091 × /48 · 6 top-level Routing data as of 2026-10-07 08:00 UTC

PrefixAddresses
2001:468:2620::/48280
2001:468:26e1::/48280
2001:48a8::/32296
2001:48a8:800::/40288
2001:48a8:68fe::/48280
2001:48a8:7800::/40288
2606:9700::/32296
2607:ff30:1110::/48280
2620:13f:6000::/44284

BGP Neighbours

46 unique neighbours · 10 upstream/peer · 35 downstream · 2 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 (10)

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
AS1299TWELVE99 Arelion Sweden AB3,04825,6611,648
AS174COGENT-174 - Cogent Communications, LLC1,92817,623934
AS2914NTT-DATA-2914 - NTT America, Inc.1,6629,3541,135
AS6939HURRICANE - Hurricane Electric LLC8773,1251,498
AS47065PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065 - USC / UFMG PEERING Research Testbed3043960
AS11537INTERNET2-RESEARCH-EDU - Internet22021,33070
AS11164INTERNET2-I2PX - Internet22011,618166
AS3303SWISSCOM Swisscom (Schweiz) AG1721,6880
AS7018ATT-INTERNET4 - AT&T Enterprises, LLC1081,12716
AS293ESNET - ESnet3223415

Downstream side (35)

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

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS231MISU-231 - Michigan State University6332,347337
AS36375UMICH-AS-5 - University of Michigan5455,591330
AS27274CMICH - Central Michigan University3621,011337
AS46825CBPU - Coldwater Board of Public Utilities361336337
AS229MERIT-AS-6 - Merit Network Inc.354334332
AS11206FSU-AS-1 - Ferris State University31211,0030
AS47065PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065 - USC / UFMG PEERING Research Testbed3043960
AS396470LCC-EDU - Lansing Community College2785340
AS62618MICHIGANTECH - Michigan Technological University2711,0090
AS62676UMD-PUBLIC-AS - University of Michigan - Dearborn2676740
AS402639WASHTENAW-COMMUNITY-COLLEGE - Washtenaw2643370
AS14924MERIT-AS-30 - Merit Network Inc.2626680
AS26174SVSU - Saginaw Valley State University2623360
AS46241WASHTENAW-ISD-ASN - Washtenaw ISD2623370
AS394769UMF-7-AS - University of Michigan - Flint2626740
AS400927BARGER-CREEK - Barger Creek Wireless2623350
AS1638MCC-CAMPUS - Mott Community College2616670
AS393817LMC-BH - Lake Michigan College2603350
AS22217CALVIN-UNIVERSITY - Calvin College2583770
AS177UMICH-AS-1 - University of Michigan2480666
AS15099MONROE-COUNTY-MI-PUBLIC-ASN - County of Monroe2483200
AS1432AC-AS-1 - Albion College2406150
AS22251REMC - Regional Educational Media Center 1 (REMC1)2286550
AS19106ANDREWS - Andrews University199228166
AS11494KELLOGGCC - Kellogg Community College1521800
AS25609DMC - Detroit Medical Center1415,1900
AS32285HFCC - Henry Ford College70930
AS398261MCCC-MONROE-MI - Monroe County Community College65830
AS400238PIEG-01 - PIE&G503890
AS393665BAKERS - Baker College40480
AS3730AQUINA-001 - Aquinas College36470
AS30154DAVEN - Davenport University36470
AS40044BRONSON-HEALTHCARE-GROUP-INC - Bronson Healthcare Group, Inc.10110
AS395945HBPW - Holland Board of Public Works10390
AS53263GRCC-AS1 - Grand Rapids Community College7160

Collector-only (2)

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
AS19151BBO-1 - BroadbandONE, LLC274140
AS49544i3Dnet i3D.net B.V2641034

Raw RDAP Response

{
  "endAutnum": 237,
  "entities": [
    {
      "entities": [
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2026-04-24T07:12:53-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2002-09-20T10:10:17-04:00"
            }
          ],
          "handle": "NETWO26-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/NETWO26-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/237"
            },
            {
              "href": "https://whois.arin.net/rest/poc/NETWO26-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/237"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "abuse"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "880 Technology Dr.\nSuite B\nAnn Arbor\nMI\n48108-8963\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "Network Abuse"
              ],
              [
                "org",
                {},
                "text",
                "Merit Network Inc."
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-734-527-5740"
              ]
            ]
          ]
        },
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2025-11-24T08:57:17-05:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "1999-02-18T13:35:59-05:00"
            }
          ],
          "handle": "IN-ORG-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/IN-ORG-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/237"
            },
            {
              "href": "https://whois.arin.net/rest/poc/IN-ORG-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/237"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "remarks": [
            {
              "description": [
                "Use [email protected] to report network abuse"
              ],
              "title": "Registration Comments"
            }
          ],
          "roles": [
            "administrative"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "880 Technology Dr.,  Suite B\nAnn Arbor\nMI\n48108-8963\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "Internet Number Administrator"
              ],
              [
                "org",
                {},
                "text",
                "Merit Network Inc."
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-734-763-3448"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "fax"
                  ]
                },
                "text",
                "+1-734-527-5790"
              ]
            ]
          ]
        },
        {
          "events": [
            {
              "eventAction": "last changed",
              "eventDate": "2025-10-28T13:12:58-04:00"
            },
            {
              "eventAction": "registration",
              "eventDate": "2007-02-21T15:18:24-05:00"
            }
          ],
          "handle": "MERIT-ARIN",
          "links": [
            {
              "href": "https://rdap.arin.net/registry/entity/MERIT-ARIN",
              "rel": "self",
              "type": "application/rdap+json",
              "value": "https://rdap.arin.net/registry/autnum/237"
            },
            {
              "href": "https://whois.arin.net/rest/poc/MERIT-ARIN",
              "rel": "alternate",
              "type": "application/xml",
              "value": "https://rdap.arin.net/registry/autnum/237"
            }
          ],
          "objectClassName": "entity",
          "port43": "whois.arin.net",
          "roles": [
            "technical"
          ],
          "status": [
            "validated"
          ],
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "adr",
                {
                  "label": "880 Technology Dr.\nSuite B\nAnn Arbor\nMI\n48108-8963\nUnited States"
                },
                "text",
                [
                  "",
                  "",
                  "",
                  "",
                  "",
                  "",
                  ""
                ]
              ],
              [
                "fn",
                {},
                "text",
                "Merit Operations"
              ],
              [
                "org",
                {},
                "text",
                "Merit Network Inc."
              ],
              [
                "kind",
                {},
                "text",
                "group"
              ],
              [
                "email",
                {},
                "text",
                "[email protected]"
              ],
              [
                "tel",
                {
                  "type": [
                    "work",
                    "voice"
                  ]
                },
                "text",
                "+1-734-527-5717"
              ]
            ]
          ]
        }
      ],
      "events": [
        {
          "eventAction": "last changed",
          "eventDate": "2020-04-21T14:02:48-04:00"
        },
        {
          "eventAction": "registration",
          "eventDate": "2009-12-08T09:46:55-05:00"
        }
      ],
      "handle": "MICH-Z",
      "links": [
        {
          "href": "https://rdap.arin.net/registry/entity/MICH-Z",
          "rel": "self",
          "type": "application/rdap+json",
          "value": "https://rdap.arin.net/registry/autnum/237"
        },
        {
          "href": "https://whois.arin.net/rest/org/MICH-Z",
          "rel": "alternate",
          "type": "application/xml",
          "value": "https://rdap.arin.net/registry/autnum/237"
        }
      ],
      "objectClassName": "entity",
      "port43": "whois.arin.net",
      "roles": [
        "registrant"
      ],
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "Merit Network Inc."
          ],
          [
            "adr",
            {
              "label": "880 Technology Dr., Suite B\nAnn Arbor\nMI\n48108\nUnited States"
            },
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              ""
            ]
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ]
        ]
      ]
    }
  ],
  "events": [
    {
      "eventAction": "last changed",
      "eventDate": "2026-09-21T14:13:45-04:00"
    },
    {
      "eventAction": "registration",
      "eventDate": "1988-09-12T00:00:00-04:00"
    }
  ],
  "handle": "AS237",
  "links": [
    {
      "href": "https://rdap.arin.net/registry/autnum/237",
      "rel": "self",
      "type": "application/rdap+json",
      "value": "https://rdap.arin.net/registry/autnum/237"
    },
    {
      "href": "https://whois.arin.net/rest/asn/AS237",
      "rel": "alternate",
      "type": "application/xml",
      "value": "https://rdap.arin.net/registry/autnum/237"
    }
  ],
  "name": "MERIT-AS-14",
  "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/237"
        }
      ],
      "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/237"
        }
      ],
      "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"
  ],
  "remarks": [
    {
      "description": [
        "Primary Merit Network ASN"
      ],
      "title": "Registration Comments"
    }
  ],
  "startAutnum": 237,
  "status": [
    "active"
  ]
}

Contact details of private individuals are redacted.