Registry · RDAP Original response
https://rdap.arin.net/registry/ip/18.31.255.255
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "18.0.0.0",
"length": 11
}
],
"endAddress": "18.31.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-09T22:04:07-04:00"
},
{
"eventAction": "registration",
"eventDate": "2026-07-09T22:04:07-04:00"
}
],
"handle": "MNOC14-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MNOC14-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/MNOC14-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "77 Massachusetts Ave\nCambridge\nMA\n02139\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"MIT - Network Operations Center"
],
[
"org",
[],
"text",
"Massachusetts Information of Technology"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"noc@mit.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-617-253-8400"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-09T10:53:20-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-09-10T08:06:20-04:00"
}
],
"handle": "MNS18-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MNS18-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/MNS18-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "304 Vassar Street\r\nW92-167\nCambridge\nMA\n02139\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"MIT Network Security"
],
[
"org",
[],
"text",
"Massachusetts Institute of Technology"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"arin-mit-security@mit.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-617-324-1782"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-07T16:58:04-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-11-15T16:03:41-05:00"
}
],
"handle": "BROWN2958-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/BROWN2958-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/BROWN2958-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "77 Massachusetts Ave\nCambridge\nMA\n02139\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Olu Brown"
],
[
"n",
[],
"text",
[
"Brown",
"Olu",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"obrown@mit.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-617-258-7870"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-12-02T00:45:20-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-09-10T08:14:17-04:00"
}
],
"handle": "MNO78-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MNO78-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/MNO78-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"dns",
"noc",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "304 Vassar Street\r\nW92-167\nCambridge\nMA\n02139\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"MIT Network Operations"
],
[
"org",
[],
"text",
"Massachusetts Institute of Technology"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"noc@mit.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-617-253-8400"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-17T08:16:41-05:00"
},
{
"eventAction": "registration",
"eventDate": "2024-11-15T16:02:24-05:00"
}
],
"handle": "GOMES41-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/GOMES41-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/GOMES41-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "77 Massachusetts Ave\nCambridge\nMA\n02139\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Marco Gomes"
],
[
"n",
[],
"text",
[
"Gomes",
"Marco",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"mgomes@mit.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-617-253-0336"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-30T11:14:18-04:00"
}
],
"handle": "MIT-2",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MIT-2",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/org/MIT-2",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Massachusetts Institute of Technology"
],
[
"adr",
{
"label": "Room W92-167\r\n77 Massachusetts Avenue\nCambridge\nMA\n02139-4307\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-09T10:53:20-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-09-10T08:06:20-04:00"
}
],
"handle": "MNS18-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MNS18-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/MNS18-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "304 Vassar Street\r\nW92-167\nCambridge\nMA\n02139\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"MIT Network Security"
],
[
"org",
[],
"text",
"Massachusetts Institute of Technology"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"arin-mit-security@mit.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-617-324-1782"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-12-02T00:45:20-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-09-10T08:14:17-04:00"
}
],
"handle": "MNO78-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MNO78-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/MNO78-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "304 Vassar Street\r\nW92-167\nCambridge\nMA\n02139\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"MIT Network Operations"
],
[
"org",
[],
"text",
"Massachusetts Institute of Technology"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"noc@mit.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-617-253-8400"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-12-02T00:55:33-05:00"
},
{
"eventAction": "registration",
"eventDate": "1994-01-01T00:00:00-05:00"
}
],
"handle": "NET-18-0-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/18.0.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
},
{
"href": "https://whois.arin.net/rest/net/NET-18-0-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/18.31.255.255"
}
],
"name": "MIT",
"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/18.31.255.255"
}
],
"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/18.31.255.255"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-18-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "18.0.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}