Organization
University of Michigan
UMICH-AS-5
Registered
Dec 16, 2005
20 years ago
IPv4 Prefixes
17
820,224 addresses
IPv6 Prefixes
1
65,536 × /48
BGP Neighbours
3
3 upstream/peer · 0 downstream
Registration
AS Number AS36375 AS Name UMICH-AS-5 Organization University of Michigan Organization ID UNIVER-118 Address IT Communications Services, 4251 Plymouth Road, Suite 2-2200, Ann Arbor, MI, 48105-3640, United States Country United States (US) Registry ARIN Allocated Dec 16, 2005 Record Created Dec 16, 2005 Last Updated Mar 02, 2012 Status
active
WHOIS Server whois.arin.net AS Description UMICH-AS-5 - University of Michigan, US Abuse Email [email protected] Abuse Phone +1-734-764-4357 IPv4 Prefixes
17 prefixes · 820,224 addresses Routing data as of 2026-10-07 08:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 35.0.0.0/16 | 35.0.0.0 – 35.0.255.255 | 65,536 |
| 35.1.0.0/16 | 35.1.0.0 – 35.1.255.255 | 65,536 |
| 35.2.0.0/16 | 35.2.0.0 – 35.2.255.255 | 65,536 |
| 35.3.0.0/16 | 35.3.0.0 – 35.3.255.255 | 65,536 |
| 35.4.0.0/16 | 35.4.0.0 – 35.4.255.255 | 65,536 |
| 35.5.0.0/16 | 35.5.0.0 – 35.5.255.255 | 65,536 |
| 35.6.0.0/16 | 35.6.0.0 – 35.6.255.255 | 65,536 |
| 35.7.0.0/18 | 35.7.0.0 – 35.7.63.255 | 16,384 |
| 35.7.128.0/18 | 35.7.128.0 – 35.7.191.255 | 16,384 |
| 67.194.0.0/16 | 67.194.0.0 – 67.194.255.255 | 65,536 |
| 141.211.0.0/16 | 141.211.0.0 – 141.211.255.255 | 65,536 |
| 141.212.0.0/16 | 141.212.0.0 – 141.212.255.255 | 65,536 |
| 141.213.0.0/16 | 141.213.0.0 – 141.213.255.255 | 65,536 |
| 141.214.0.0/16 | 141.214.0.0 – 141.214.255.255 | 65,536 |
| 192.12.80.0/24 | 192.12.80.0 – 192.12.80.255 | 256 |
| 192.41.232.0/23 | 192.41.232.0 – 192.41.233.255 | 512 |
| 192.231.253.0/24 | 192.231.253.0 – 192.231.253.255 | 256 |
IPv6 Prefixes
1 prefix · 65,536 × /48 Routing data as of 2026-10-07 08:00 UTC
| Prefix | Addresses |
|---|---|
| 2607:f018:: | 296 |
BGP Neighbours
3 unique neighbours · 3 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. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (3)
Raw RDAP Response
{
"endAutnum": 36375,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-05-01T08:39:49-04:00"
},
{
"eventAction": "registration",
"eventDate": "2007-01-31T09:54:13-05:00"
}
],
"handle": "INA18-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/INA18-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/36375"
},
{
"href": "https://whois.arin.net/rest/poc/INA18-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/36375"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "4251 Plymouth Road\nBuilding 3, Suite 1400\nAnn Arbor\nMI\n48105-3640\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Internet Numbers Administration"
],
[
"org",
{},
"text",
"University of Michigan"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-734-647-4200"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-31T08:13:33-04:00"
},
{
"eventAction": "registration",
"eventDate": "2007-02-12T12:18:21-05:00"
}
],
"handle": "IAI8-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/IAI8-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/36375"
},
{
"href": "https://whois.arin.net/rest/poc/IAI8-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/36375"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "4251 Plymouth Road\nSuite 3-2100\nAnn Arbor\nMI\n48105-3640\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"IT Abuse Investigation"
],
[
"org",
{},
"text",
"University of Michigan"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-734-764-4357"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-20T09:07:41-04:00"
},
{
"eventAction": "registration",
"eventDate": "1997-09-30T09:05:56-04:00"
}
],
"handle": "UA11-ORG-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UA11-ORG-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/36375"
},
{
"href": "https://whois.arin.net/rest/poc/UA11-ORG-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/36375"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "4251 Plymouth Road\nBuilding 3, Suite 1400\nAnn Arbor\nMI\n48105-3640\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"UMnet Administration"
],
[
"org",
{},
"text",
"University of Michigan"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-734-647-4200"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2017-01-28T08:32:29-05:00"
},
{
"eventAction": "registration",
"eventDate": "1985-07-23T00:00:00-04:00"
}
],
"handle": "UNIVER-118",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UNIVER-118",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/36375"
},
{
"href": "https://whois.arin.net/rest/org/UNIVER-118",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/36375"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"For DMCA info see http://www.umich.edu/~itua/copyright/"
],
"title": "Registration Comments"
}
],
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"University of Michigan"
],
[
"adr",
{
"label": "IT Communications Services\n4251 Plymouth Road, Suite 2-2200\nAnn Arbor\nMI\n48105-3640\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-03-02T08:03:18-05:00"
},
{
"eventAction": "registration",
"eventDate": "2005-12-16T14:52:31-05:00"
}
],
"handle": "AS36375",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/36375",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/36375"
},
{
"href": "https://whois.arin.net/rest/asn/AS36375",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/36375"
}
],
"name": "UMICH-AS-5",
"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/36375"
}
],
"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/36375"
}
],
"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": 36375,
"status": [
"active"
]
} Contact details of private individuals are redacted.