Registration
Announced Prefixes
This AS is not currently announcing any IPv4 or IPv6 prefixes in the global BGP table (as seen by the RIPE RIS route collectors).
BGP Neighbours
35 unique neighbours · 6 upstream/peer · 31 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. Networks seen to the right of this AS in BGP paths — networks whose routes it carries, typically its customers (downstreams). Upstream & peer side (6)
AS Name AS paths IPv4 sightings IPv6 sightings AS11537 INTERNET2-RESEARCH-EDU - Internet2 987 8,121 186 AS2152 CENIC-2152 - CENIC 235 0 680 AS7575 AARNET-AS-AP - Australian Academic and Research Network (AARNet) 231 4,188 61 AS293 ESNET - ESnet 158 1,286 35 AS195 SDSC-AS - San Diego Supercomputer Center 121 150 0 AS2907 SINET-AS - Research Organization of Information and Systems, National Institute of Informatics 45 781 35 Downstream side (31)
AS Name AS paths IPv4 sightings IPv6 sightings AS2152 CENIC-2152 - CENIC 1,030 12,357 189 AS6192 UCDAVIS-CORE - University of California, Davis 253 53 697 AS46985 HPWREN - The Regents of the University of California - University of California, San Diego. 130 175 0 AS195 SDSC-AS - San Diego Supercomputer Center 74 483 17 AS40498 ABQG - New Mexico Lambda Rail, Inc. 29 82 0 AS567 ASN-LNET-AS - Los Nettos 27 579 3 AS52 UCLA - University of California, Los Angeles 18 90 5 AS24 AS24 - National Aeronautics and Space Administration 14 0 14 AS257 DNIC-AS-00257 - Navy Network Information Center (NNIC) 11 41 0 AS5653 UCSF - University of California San Francisco 11 38 0 AS6106 UCR-EDU - University of California, Riverside 11 11 13 AS22323 UNIVERSITY-OF-CALIFORNIA-MERCED - University of California, Merced 11 11 0 AS26397 OPTIPUTER - The Regents of the University of California - University of California, San Diego. 11 43 0 AS299 UCINET-AS - University of California, Irvine 10 45 2 AS9 CMU-ROUTER - Carnegie Mellon University 9 9 0 AS31 CIT - California Institute of Technology 9 45 6 AS131 UCSB-NET-AS - University of California, Santa Barbara 9 45 0 AS2037 CSUFRESNO - California State University at Fresno 9 9 0 AS5739 UCSC - University of California, Santa Cruz 9 18 5 AS7377 UCSD - University of California, San Diego 9 144 9 AS7960 CALPOLY-NET-ENS - California Polytechnic State University 9 9 0 AS26488 SCU-ASN - Santa Clara University 9 9 0 AS32361 ULTRALIGHT - UltraLight 9 45 8 AS396310 SDSU-SCIENCE-NETWORK - San Diego State University 9 18 0 AS396465 SACSTATE - California State University, Sacramento 9 9 0 AS32 STANFORD - Stanford University 8 17 7 AS46357 CALPOLY-NETLAB - California Polytechnic State University 7 7 4 AS47 USC-AS - University of Southern California 6 6 0 AS16 LBL - Lawrence Berkeley National Laboratory 2 4 0 AS6360 UNIVHAWAII - University of Hawaii 1 0 1 AS14041 AS-FRGP - University Corporation for Atmospheric Research 1 0 1
Raw RDAP Response
{
"endAutnum": 2153,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-15T18:36:30-04:00"
},
{
"eventAction": "registration",
"eventDate": "2004-09-17T16:08:41-04:00"
}
],
"handle": "ABUSE711-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE711-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/2153"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE711-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/2153"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "16700 Valley View Ave.\nSuite 400\nLa Mirada\nCA\n90638\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"CENIC Abuse"
],
[
"org",
{},
"text",
"CENIC"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-714-220-3494"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-11T12:22:28-04:00"
},
{
"eventAction": "registration",
"eventDate": "2004-03-25T18:06:10-05:00"
}
],
"handle": "OPERA63-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/OPERA63-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/2153"
},
{
"href": "https://whois.arin.net/rest/poc/OPERA63-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/2153"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"CENIC -- Corporation for Education Networking Initiatives in California"
],
"title": "Registration Comments"
}
],
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "16700 Valley View Ave.\nSuite 400\nLa Mirada\nCA\n90638\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Admin Domain"
],
[
"org",
{},
"text",
"CENIC"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-714-220-3494"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-27T12:52:42-04:00"
},
{
"eventAction": "registration",
"eventDate": "2004-03-25T18:06:10-05:00"
}
],
"handle": "DOMAI64-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/DOMAI64-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/2153"
},
{
"href": "https://whois.arin.net/rest/poc/DOMAI64-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/2153"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "16700 Valley View Ave.\nSuite 400\nLa Mirada\nCA\n90638\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Admin Domain"
],
[
"org",
{},
"text",
"CENIC"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-714-220-3494"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-11-25T11:09:46-05:00"
},
{
"eventAction": "registration",
"eventDate": "1998-08-18T00:00:00-04:00"
}
],
"handle": "CENIC",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CENIC",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/2153"
},
{
"href": "https://whois.arin.net/rest/org/CENIC",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/2153"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"CENIC"
],
[
"adr",
{
"label": "5757 Plaza Drive, Suite 205\nCypress\nCA\n90630-5029\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-07-08T17:00:24-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-07-08T17:00:24-04:00"
}
],
"handle": "AS2153",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/2153",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/2153"
},
{
"href": "https://whois.arin.net/rest/asn/AS2153",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/2153"
}
],
"name": "CENIC-2153",
"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/2153"
}
],
"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/2153"
}
],
"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": 2153,
"status": [
"active"
]
} Contact details of private individuals are redacted.