Whois & RDAP Lookup
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RDAPHandleAS11736
NameUSD
HolderUniversity of South Dakota
Registered1998-12-03 05:00 UTC
Updated2021-10-18 14:15 UTC
RegistrantUniversity of South Dakota
Address414 E. Clark Street, Vermillion, SD, 57069, United States
Admin ContactCheryl Tiahrt
Email[email protected]
Phone+1-605-658-6000
AddressThe University of South Dakota
, 414 East Clark, Vermillion, SD, 57069, United States
Tech ContactMichael Clobes
Email[email protected]
Phone+1-605-658-6000
Address414 E Clark St, Vermillion, SD, 57069, United States
Abuse Contact[email protected]
Abuse Phone+1-605-658-6000
Statusactive
Registry RDAPhttps://rdap.arin.net
Raw RDAP JSON (registry) https://rdap.arin.net
{
"endAutnum": 11736,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2022-10-18T09:14:27-04:00"
},
{
"eventAction": "registration",
"eventDate": "2021-10-18T11:04:54-04:00"
}
],
"handle": "CLOBE-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CLOBE-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/poc/CLOBE-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
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],
"title": "Unvalidated POC"
}
],
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],
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[
[
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},
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]
],
[
"fn",
{},
"text",
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]
],
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[
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],
[
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]
},
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]
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},
{
"events": [
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"eventDate": "2025-11-03T11:51:32-05:00"
},
{
"eventAction": "registration",
"eventDate": "2001-11-08T09:43:24-05:00"
}
],
"handle": "CT509-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CT509-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/poc/CT509-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"status": [
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],
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[
[
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{},
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],
[
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},
"text",
[
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]
],
[
"fn",
{},
"text",
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],
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{},
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""
]
],
[
"kind",
{},
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],
[
"email",
{},
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"[email protected]"
],
[
"email",
{},
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"[email protected]"
],
[
"tel",
{
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]
},
"text",
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],
[
"tel",
{
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]
},
"text",
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],
[
"tel",
{
"type": [
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]
},
"text",
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]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-26T08:02:50-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-03-21T14:30:21-04:00"
}
],
"handle": "KELLY532-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/KELLY532-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/poc/KELLY532-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
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},
"text",
[
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""
]
],
[
"fn",
{},
"text",
"Kyle Kelly"
],
[
"n",
{},
"text",
[
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"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-605-658-6042"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2021-10-18T12:56:23-04:00"
},
{
"eventAction": "registration",
"eventDate": "1989-09-04T00:00:00-04:00"
}
],
"handle": "USD-1",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/USD-1",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/org/USD-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"University of South Dakota"
],
[
"adr",
{
"label": "414 E. Clark Street\nVermillion\nSD\n57069\nUnited States"
},
"text",
[
"",
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""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2021-09-21T16:06:36-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-07-23T08:43:53-04:00"
}
],
"handle": "GRUHN-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/GRUHN-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/poc/GRUHN-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"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 2022-09-21"
],
"title": "Unvalidated POC"
}
],
"roles": [
"noc",
"abuse",
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "ITS Slagle 19\n414 East Clark Street\nVermillion\nSD\n57069\nUnited States"
},
"text",
[
"",
"",
"",
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"",
"",
""
]
],
[
"fn",
{},
"text",
"Kyle Gruhn"
],
[
"n",
{},
"text",
[
"Gruhn",
"Kyle",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-605-658-6000"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-605-658-6035"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-03T11:51:32-05:00"
},
{
"eventAction": "registration",
"eventDate": "2001-11-08T09:43:24-05:00"
}
],
"handle": "CT509-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CT509-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/poc/CT509-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"abuse",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "The University of South Dakota\r\n414 East Clark\nVermillion\nSD\n57069\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Cheryl Tiahrt"
],
[
"n",
{},
"text",
[
"Tiahrt",
"Cheryl",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-605-658-6000"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-605-658-6025"
],
[
"tel",
{
"type": [
"work",
"fax"
]
},
"text",
"+1-605-677-5043"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-10-17T09:29:48-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-08-22T17:45:39-04:00"
}
],
"handle": "PETER1557-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/PETER1557-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/poc/PETER1557-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"abuse",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "414 East Clark St\nSlagle 301\nVermillion\nSD\n57069\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Lance Peterson"
],
[
"n",
{},
"text",
[
"Peterson",
"Lance",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-605-658-6060"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2021-10-18T10:15:01-04:00"
},
{
"eventAction": "registration",
"eventDate": "1998-12-03T00:00:00-05:00"
}
],
"handle": "AS11736",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/11736",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/11736"
},
{
"href": "https://whois.arin.net/rest/asn/AS11736",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/11736"
}
],
"name": "USD",
"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/autnum/11736"
}
],
"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/autnum/11736"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"startAutnum": 11736,
"status": [
"active"
]
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.