Registration
IPv4 Prefixes
1 prefix · 2,048 addresses Routing data as of 2026-10-09 08:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 72.36.120.0/21 | 72.36.120.0 – 72.36.127.255 | 2,048 |
IPv6 Prefixes
1 prefix · 1 × /48 Routing data as of 2026-10-09 08:00 UTC
| Prefix | Addresses |
|---|---|
| 2620:0:e10:: | 280 |
BGP Neighbours
14 unique neighbours · 7 upstream/peer · 7 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. Networks seen to the right of this AS in BGP paths — networks whose routes it carries, typically its customers (downstreams). Upstream & peer side (7)
AS Name AS paths IPv4 sightings IPv6 sightings AS23473 PAVLOVMEDIA - PAVLOV MEDIA INC 1,615 3,424 1,680 AS1299 TWELVE99 Arelion Sweden AB 759 2,271 679 AS2381 WISCNET1-AS - WiscNet 275 775 21 AS11164 INTERNET2-I2PX - Internet2 79 231 85 AS11537 INTERNET2-RESEARCH-EDU - Internet2 36 70 26 AS293 ESNET - ESnet 7 15 6 AS22335 MREN - Metropolitan Research and Education Network 5 5 0 Downstream side (7)
AS Name AS paths IPv4 sightings IPv6 sightings AS38 UIUC - University of Illinois 474 1,540 1,085 AS14834 UIS-AS - University of Illinois at Springfield 472 770 363 AS698 ASN-UIUC-REGION-AS - University of Illinois 470 770 363 AS1224 NCSA-AS - University of Illinois 458 719 323 AS32464 UICOMP-AS - University Of Illinois College Of Medicine At Peoria 286 383 0 AS6200 UIC-AS - University of Illinois Chicago 283 2,218 0 AS26367 BRADLEY-UNIVERSITY - Bradley University 5 5 0
Raw RDAP Response
{
"endAutnum": 40387,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-21T11:48:15-04:00"
},
{
"eventAction": "registration",
"eventDate": "2003-01-17T16:40:57-05:00"
}
],
"handle": "HOSTM159-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HOSTM159-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/40387"
},
{
"href": "https://whois.arin.net/rest/poc/HOSTM159-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/40387"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1304 West Springfield Avenue\nUrbana\nIL\n61801\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Hostmgr"
],
[
"org",
{},
"text",
"University of Illinois at Urbana-Champaign"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-217-244-1000"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-25T14:32:09-04:00"
},
{
"eventAction": "registration",
"eventDate": "2003-12-16T13:02:15-05:00"
}
],
"handle": "UIUCS-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UIUCS-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/40387"
},
{
"href": "https://whois.arin.net/rest/poc/UIUCS-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/40387"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1304 West Springfield Avenue\n2222 DCL, MC-256\nUrbana\nIL\n61801\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"UIUC Security"
],
[
"org",
{},
"text",
"University of Illinois at Urbana-Champaign"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-217-265-0000"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2014-12-02T11:36:11-05:00"
}
],
"handle": "UIUC",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UIUC",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/40387"
},
{
"href": "https://whois.arin.net/rest/org/UIUC",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/40387"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"University of Illinois"
],
[
"adr",
{
"label": "1120 DCL, MC-256\r\n1304 West Springfield Avenue\nUrbana\nIL\n61801\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2014-12-02T11:44:43-05:00"
},
{
"eventAction": "registration",
"eventDate": "2007-02-07T13:49:57-05:00"
}
],
"handle": "AS40387",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/40387",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/40387"
},
{
"href": "https://whois.arin.net/rest/asn/AS40387",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/40387"
}
],
"name": "UI-ICCN",
"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/40387"
}
],
"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/40387"
}
],
"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": 40387,
"status": [
"active"
]
} Contact details of private individuals are redacted.