Registry · RDAP Original response
https://rdap.arin.net/registry/ip/129.19.255.255
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "129.19.192.0",
"length": 18
}
],
"endAddress": "129.19.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-22T11:05:36-04:00"
},
{
"eventAction": "registration",
"eventDate": "2003-05-27T21:30:06-04:00"
}
],
"handle": "ABUSE306-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE306-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE306-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "Information Technology Services\n3645 Marine Street\nBoulder\nCO\n80309-0455\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Abuse"
],
[
"org",
[],
"text",
"University of Colorado - Boulder"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"abuse@colorado.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-303-735-4357"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-14T11:19:37-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-11-11T12:28:54-05:00"
}
],
"handle": "CUBOU-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CUBOU-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
},
{
"href": "https://whois.arin.net/rest/poc/CUBOU-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "3645 Marine Street\nCampus Box 455\nBoulder\nCO\n80309-0445\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"CUBoulder"
],
[
"org",
[],
"text",
"University of Colorado - Boulder"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"arinadmin@colorado.edu"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-303-735-4357"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-11-25T11:09:46-05:00"
},
{
"eventAction": "registration",
"eventDate": "1992-11-23T00:00:00-05:00"
}
],
"handle": "UCB-2",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UCB-2",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
},
{
"href": "https://whois.arin.net/rest/org/UCB-2",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"University of Colorado Boulder"
],
[
"adr",
{
"label": "Office of Information Technology\r\n3645 Marine Street\nBoulder\nCO\n80309-0455\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2019-01-15T19:00:45-05:00"
},
{
"eventAction": "registration",
"eventDate": "2019-01-15T19:00:45-05:00"
}
],
"handle": "NET-129-19-192-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/129.19.192.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
},
{
"href": "https://whois.arin.net/rest/net/NET-129-19-192-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
},
{
"href": "https://rdap.arin.net/registry/ip/129.19.0.0/16",
"rel": "up",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/129.19.255.255"
}
],
"name": "UCB-WESTNET",
"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/129.19.255.255"
}
],
"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/129.19.255.255"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-129-19-0-0-1",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "129.19.192.0",
"status": [
"active"
],
"type": "ALLOCATION"
}