Registry · RDAP Original response
https://rdap.arin.net/registry/ip/128.4.0.0/16
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "128.4.0.0",
"length": 16
}
],
"endAddress": "128.4.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-28T14:54:29-04:00"
},
{
"eventAction": "registration",
"eventDate": "2010-06-15T07:43:46-04:00"
}
],
"handle": "NSS13-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NSS13-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/poc/NSS13-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"status": [
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],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
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{
"label": "192 South Chapel Street\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Network and Systems Services"
],
[
"org",
[],
"text",
"University of Delaware"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"noc@udel.edu"
],
[
"email",
[],
"text",
"network-technical@udel.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6000"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-10T08:34:25-05:00"
},
{
"eventAction": "registration",
"eventDate": "2009-08-07T07:54:03-04:00"
}
],
"handle": "UDELN-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UDELN-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/poc/UDELN-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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"noc",
"dns"
],
"status": [
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],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
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},
"text",
[
"",
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"",
"",
"",
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""
]
],
[
"fn",
[],
"text",
"UDel NOC"
],
[
"org",
[],
"text",
"University of Delaware"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"noc@udel.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6000"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-302-831-3717"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-19T11:51:03-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-09-21T14:30:35-04:00"
}
],
"handle": "DAVIS2708-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/DAVIS2708-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/poc/DAVIS2708-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "192 S. Chapel St\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Michael DAvis"
],
[
"n",
[],
"text",
[
"DAvis",
"Michael",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"davis@udel.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6006"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-23T15:38:08-04:00"
},
{
"eventAction": "registration",
"eventDate": "2026-07-23T15:38:08-04:00"
}
],
"handle": "HUFFM208-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HUFFM208-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/poc/HUFFM208-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"dns",
"noc",
"abuse",
"technical",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "192 South Chapel Street\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Scott Huffman"
],
[
"n",
[],
"text",
[
"Huffman",
"Scott",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"scotthu@udel.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-7377"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-30T11:54:01-04:00"
},
{
"eventAction": "registration",
"eventDate": "2008-03-18T13:19:36-04:00"
}
],
"handle": "UNIVER-19-Z",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UNIVER-19-Z",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/org/UNIVER-19-Z",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"University of Delaware"
],
[
"adr",
{
"label": "Information Technologies\n192 South Chapel Street\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-19T11:51:03-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-09-21T14:30:35-04:00"
}
],
"handle": "DAVIS2708-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/DAVIS2708-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/poc/DAVIS2708-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "192 S. Chapel St\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Michael DAvis"
],
[
"n",
[],
"text",
[
"DAvis",
"Michael",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"davis@udel.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6006"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-29T09:38:35-04:00"
},
{
"eventAction": "registration",
"eventDate": "2026-06-29T09:38:35-04:00"
}
],
"handle": "HUFFM207-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HUFFM207-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/poc/HUFFM207-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc",
"technical",
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "192 S. Chapel St.\nNewark\nDE\n19716\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Scott Huffman"
],
[
"n",
[],
"text",
[
"Huffman",
"Scott",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"scotthu@udel.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-302-831-6006"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-29T09:51:17-04:00"
},
{
"eventAction": "registration",
"eventDate": "1991-01-10T00:00:00-05:00"
}
],
"handle": "NET-128-4-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/128.4.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
},
{
"href": "https://whois.arin.net/rest/net/NET-128-4-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/128.4.0.0/16"
}
],
"name": "UDEL-DCN",
"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/128.4.0.0/16"
}
],
"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/128.4.0.0/16"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-128-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "128.4.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}