Registry · RDAP Original response https://rdap.arin.net/registry/ip/137.110.0.0/16 Copy record
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "137.110.0.0 ",
"length": 16
}
],
"endAddress": "137.110.255.255 ",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-05-15T21:55:07-04:00"
},
{
"eventAction": "registration",
"eventDate": "2026-05-15T21:55:07-04:00"
}
],
"handle": "UNA13-ARIN",
"links": [
{
"href": "https://rdap.arin.net /registry/entity/UNA13-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
},
{
"href": "https://whois.arin.net /rest/poc/UNA13-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net ",
"roles": [
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],
"status": [
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],
"vcardArray": [
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[
[
"version",
[],
"text",
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],
[
"adr",
{
"label": "10280 North Torrey Pines Road\nLa Jolla\nCA\n92093-0903\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"UCSD Network Abuse"
],
[
"org",
[],
"text",
"UCSD"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"network-abuse@ucsd.edu "
],
[
"email",
[],
"text",
"jmadden@ucsd.edu "
],
[
"email",
[],
"text",
"msamadi@ucsd.edu "
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-858-822-0249"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-11T18:21:12-05:00"
},
{
"eventAction": "registration",
"eventDate": "2005-04-18T19:00:16-04:00"
}
],
"handle": "NOC1807-ARIN",
"links": [
{
"href": "https://rdap.arin.net /registry/entity/NOC1807-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
},
{
"href": "https://whois.arin.net /rest/poc/NOC1807-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net ",
"roles": [
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"abuse",
"noc",
"administrative",
"routing",
"technical"
],
"status": [
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],
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[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "IT Services\nMail Code 0928\nAttn: Malerie Samadi\n9500 Gilman Dr\nLa Jolla\nCA\n92093-0928\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Network Operations Center"
],
[
"org",
[],
"text",
"University of California, San Diego"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"architects@ucsd.edu "
],
[
"email",
[],
"text",
"msamadi@ucsd.edu "
],
[
"email",
[],
"text",
"datacom-mgmt-l@ucsd.edu "
],
[
"email",
[],
"text",
"jmadden@ucsd.edu "
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-858-822-0249"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-05-15T21:57:30-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-08-23T16:00:52-04:00"
}
],
"handle": "UCSD-1-Z",
"links": [
{
"href": "https://rdap.arin.net /registry/entity/UCSD-1-Z",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
},
{
"href": "https://whois.arin.net /rest/org/UCSD-1-Z",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net ",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"University of California, San Diego"
],
[
"adr",
{
"label": "IT Services\n9500 Gilman Dr, #0903\nAttn: Hostmaster\nLa Jolla\nCA\n92093-0903\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-12-19T14:54:07-05:00"
},
{
"eventAction": "registration",
"eventDate": "1989-11-17T00:00:00-05:00"
}
],
"handle": "NET-137-110-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net /registry/ip/137.110.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
},
{
"href": "https://whois.arin.net /rest/net/NET-137-110-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net /registry/ip/137.110.0.0/16"
}
],
"name": "UCSDEXTRN",
"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/137.110.0.0/16"
}
],
"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/137.110.0.0/16"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-137-0-0-0-0",
"port43": "whois.arin.net ",
"rdapConformance": [
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"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "137.110.0.0 ",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
} 