AS194
University Corporation for Atmospheric Research
ARIN US active Announced
More ASNs in the United States → Organization
University Corporation for Atmospheric Research
UCAR
Registered
May 26, 1988
38 years ago
IPv4 Prefixes
4
66,048 addresses
IPv6 Prefixes
1
256 × /48
BGP Neighbours
1
1 upstream/peer · 0 downstream
Registration
AS Number AS194 AS Name UCAR Organization University Corporation for Atmospheric Research Organization ID UCAR-1 Address 3090 Center Green Drive, Boulder, CO, 80301, United States Country United States (US) Registry ARIN Allocated May 26, 1988 Record Created May 26, 1988 Last Updated May 11, 2026 Status
active
WHOIS Server whois.arin.net AS Description UCAR-AS - University Corporation for Atmospheric Research, US Abuse Email [email protected] Abuse Phone +1-307-996-4300 IPv4 Prefixes
4 prefixes · 66,048 addresses · 3 top-level Routing data as of 2026-10-09 00:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 128.117.0.0/16 | 128.117.0.0 – 128.117.255.255 | 65,536 |
| 128.117.208.0/22 | 128.117.208.0 – 128.117.211.255 | 1,024 |
| 192.43.244.0/24 | 192.43.244.0 – 192.43.244.255 | 256 |
| 192.52.106.0/24 | 192.52.106.0 – 192.52.106.255 | 256 |
IPv6 Prefixes
1 prefix · 256 × /48 Routing data as of 2026-10-09 00:00 UTC
| Prefix | Addresses |
|---|---|
| 2620:117:2000:: | 288 |
BGP Neighbours
1 unique neighbour · 1 upstream/peer · 0 downstream. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (1)
AS Name AS paths IPv4 sightings IPv6 sightings AS14041 AS-FRGP - University Corporation for Atmospheric Research 475 1,354 339
Raw RDAP Response
{
"endAutnum": 194,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-27T13:43:32-04:00"
},
{
"eventAction": "registration",
"eventDate": "2018-02-20T12:22:27-05:00"
}
],
"handle": "MEEHL5-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MEEHL5-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/MEEHL5-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
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[
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{},
"text",
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],
[
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{},
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],
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]
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},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-26T11:08:09-04:00"
},
{
"eventAction": "registration",
"eventDate": "2022-07-22T15:35:42-04:00"
}
],
"handle": "HERNA1265-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HERNA1265-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/HERNA1265-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
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{},
"text",
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],
[
"fn",
{},
"text",
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],
[
"kind",
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]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-30T17:35:16-04:00"
},
{
"eventAction": "registration",
"eventDate": "2022-11-07T11:31:48-05:00"
}
],
"handle": "ADLER49-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ADLER49-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/ADLER49-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
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],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
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{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
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]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-03T10:52:00-05:00"
},
{
"eventAction": "registration",
"eventDate": "2002-08-28T19:30:07-04:00"
}
],
"handle": "ABUSE18-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE18-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE18-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1850 Table Mesa Drive\nBoulder\nCO\n80305\nUnited States"
},
"text",
[
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"",
"",
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]
],
[
"fn",
{},
"text",
"Abuse"
],
[
"org",
{},
"text",
"National Center for Atmospheric Research"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-307-996-4300"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-30T18:41:16-04:00"
},
{
"eventAction": "registration",
"eventDate": "1999-12-10T12:14:21-05:00"
}
],
"handle": "ZN10-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ZN10-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/ZN10-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1850 Table Mesa Dr.\nBoulder\nCO\n80305\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"National Center for Atmospheric Research"
],
[
"org",
{},
"text",
"University Corporation for Atmospheric Research"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-307-996-4300"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-11T15:56:34-04:00"
},
{
"eventAction": "registration",
"eventDate": "1988-05-26T00:00:00-04:00"
}
],
"handle": "UCAR-1",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/UCAR-1",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/org/UCAR-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"University Corporation for Atmospheric Research"
],
[
"adr",
{
"label": "3090 Center Green Drive\nBoulder\nCO\n80301\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-26T11:08:09-04:00"
},
{
"eventAction": "registration",
"eventDate": "2022-07-22T15:35:42-04:00"
}
],
"handle": "HERNA1265-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HERNA1265-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/HERNA1265-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-30T17:35:16-04:00"
},
{
"eventAction": "registration",
"eventDate": "2022-11-07T11:31:48-05:00"
}
],
"handle": "ADLER49-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ADLER49-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/ADLER49-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-30T18:41:16-04:00"
},
{
"eventAction": "registration",
"eventDate": "1999-12-10T12:14:21-05:00"
}
],
"handle": "ZN10-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ZN10-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/poc/ZN10-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1850 Table Mesa Dr.\nBoulder\nCO\n80305\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"National Center for Atmospheric Research"
],
[
"org",
{},
"text",
"University Corporation for Atmospheric Research"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-307-996-4300"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-05-11T15:54:36-04:00"
},
{
"eventAction": "registration",
"eventDate": "1988-05-26T00:00:00-04:00"
}
],
"handle": "AS194",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/194",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/194"
},
{
"href": "https://whois.arin.net/rest/asn/AS194",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/194"
}
],
"name": "UCAR",
"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/194"
}
],
"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/194"
}
],
"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": 194,
"status": [
"active"
]
} Contact details of private individuals are redacted.