Registry · RDAP Original response
https://rdap.arin.net/registry/ip/138.5.158.0/23
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "138.5.0.0",
"length": 16
}
],
"endAddress": "138.5.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-16T09:10:17-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-06-15T11:46:30-04:00"
}
],
"handle": "GUPTA137-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/GUPTA137-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
},
{
"href": "https://whois.arin.net/rest/poc/GUPTA137-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "450 clarkson ave\nBrooklyn\nNY\n11203\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Prabhat Gupta"
],
[
"n",
[],
"text",
[
"Gupta",
"Prabhat",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"prabhat.gupta@downstate.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-718-270-4750"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-13T13:08:47-05:00"
},
{
"eventAction": "registration",
"eventDate": "2004-01-14T09:49:15-05:00"
}
],
"handle": "JWE31-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JWE31-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
},
{
"href": "https://whois.arin.net/rest/poc/JWE31-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"technical",
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "450 Clarkson Avenue\nBrooklyn\nNY\n11203\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Jason Wei"
],
[
"n",
[],
"text",
[
"Wei",
"Jason",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"jason.wei@downstate.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-718-270-1994"
],
[
"tel",
{
"type": [
"work",
"cell"
]
},
"text",
"+1-646-372-7786"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-06-30T11:59:38-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-06-30T11:59:38-04:00"
}
],
"handle": "SHSC-Z",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/SHSC-Z",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
},
{
"href": "https://whois.arin.net/rest/org/SHSC-Z",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"State University of New York Downstate Health Sciences University"
],
[
"adr",
{
"label": "450 Clarkson Avenue\nBrooklyn\nNY\n11203\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2013-12-03T09:34:17-05:00"
},
{
"eventAction": "registration",
"eventDate": "2001-09-07T12:41:25-04:00"
}
],
"handle": "JS3062-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/JS3062-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
},
{
"href": "https://whois.arin.net/rest/poc/JS3062-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2014-12-03"
],
"title": "Unvalidated POC"
}
],
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "450 Clarkson Avenue\nBrooklyn\nNY\n11203\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Joel Stern"
],
[
"n",
[],
"text",
[
"Stern",
"Joel",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"joel.stern@downstate.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-718-270-4093"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-06-30T17:28:35-04:00"
},
{
"eventAction": "registration",
"eventDate": "1992-12-14T00:00:00-05:00"
}
],
"handle": "NET-138-5-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/138.5.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
},
{
"href": "https://whois.arin.net/rest/net/NET-138-5-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/138.5.158.0/23"
}
],
"name": "SNYBKLYN",
"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/138.5.158.0/23"
}
],
"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/138.5.158.0/23"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-138-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "138.5.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}