AS513
CERN - European Organization for Nuclear Research
Registration
IPv4 Prefixes
20 prefixes · 354,816 addresses Routing data as of 2026-10-06 08:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 128.141.0.0/16 | 128.141.0.0 – 128.141.255.255 | 65,536 |
| 128.142.0.0/16 | 128.142.0.0 – 128.142.255.255 | 65,536 |
| 137.138.0.0/16 | 137.138.0.0 – 137.138.255.255 | 65,536 |
| 185.249.56.0/22 | 185.249.56.0 – 185.249.59.255 | 1,024 |
| 188.184.0.0/16 | 188.184.0.0 – 188.184.255.255 | 65,536 |
| 188.185.0.0/16 | 188.185.0.0 – 188.185.255.255 | 65,536 |
| 192.16.155.0/24 | 192.16.155.0 – 192.16.155.255 | 256 |
| 192.16.156.0/22 | 192.16.156.0 – 192.16.159.255 | 1,024 |
| 192.16.160.0/22 | 192.16.160.0 – 192.16.163.255 | 1,024 |
| 192.16.164.0/23 | 192.16.164.0 – 192.16.165.255 | 512 |
| 192.16.166.0/24 | 192.16.166.0 – 192.16.166.255 | 256 |
| 192.65.183.0/24 | 192.65.183.0 – 192.65.183.255 | 256 |
| 192.65.184.0/21 | 192.65.184.0 – 192.65.191.255 | 2,048 |
| 192.65.192.0/22 | 192.65.192.0 – 192.65.195.255 | 1,024 |
| 192.65.196.0/23 | 192.65.196.0 – 192.65.197.255 | 512 |
| 192.91.236.0/22 | 192.91.236.0 – 192.91.239.255 | 1,024 |
| 192.91.240.0/22 | 192.91.240.0 – 192.91.243.255 | 1,024 |
| 192.91.244.0/23 | 192.91.244.0 – 192.91.245.255 | 512 |
| 192.91.246.0/24 | 192.91.246.0 – 192.91.246.255 | 256 |
| 194.12.128.0/18 | 194.12.128.0 – 194.12.191.255 | 16,384 |
IPv6 Prefixes
2 prefixes · 131,072 × /48 Routing data as of 2026-10-06 08:00 UTC
| Prefix | Addresses |
|---|---|
| 2001:1458:: | 296 |
| 2001:1459:: | 296 |
BGP Neighbours
54 unique neighbours · 13 upstream/peer · 6 downstream · 40 collector-only. 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). Networks seen to the left of this AS only when they peer directly with a RIPE RIS route collector, so the adjacency may be an artefact of that peering; many of them also appear on the downstream side. Upstream & peer side (13)
AS Name AS paths IPv4 sightings IPv6 sightings AS25091 IP-Max IP-Max SA 51,750 439,732 956 AS21320 GEANT_IAS_VRF GEANT Vereniging 43,775 223,884 82,033 AS174 COGENT-174 - Cogent Communications, LLC 39,878 240,270 118,143 AS6939 HURRICANE - Hurricane Electric LLC 16,760 116,629 152 AS29222 Infomaniak-AS Infomaniak Network SA 10,902 46,249 37,907 AS20965 GEANT GEANT Vereniging 5,575 8,093 5,616 AS6730 SUNRISE Sunrise GmbH 2,393 7,471 6,357 AS2907 SINET-AS - Research Organization of Information and Systems, National Institute of Informatics 118 1,152 80 AS30781 JAGUAR-AS Free Pro SAS 68 0 114 AS559 Switch SWITCH 53 425 86 AS15576 NTS NTS workspace AG 52 141 62 AS1103 SURFNET-NL SURF B.V. 39 235 41 AS34177 CELESTE-AS Celeste SAS 30 157 19 Downstream side (6)
AS Name AS paths IPv4 sightings IPv6 sightings AS20940 AKAMAI-ASN1 Akamai International B.V. 482 361 327 AS28810 WHO-AS World Health Organization (WHO) 397 517 0 AS48751 UNOG-AS United Nations Logistics Base 276 644 0 AS21449 ETATGE Etat de Geneve 56 242 49 AS12654 RIPE-NCC-RIS-AS Reseaux IP Europeens Network Coordination Centre (RIPE NCC) 44 28 85 AS25152 K-ROOT-SERVER Reseaux IP Europeens Network Coordination Centre (RIPE NCC) 6 21 24 Collector-only (40)
AS Name AS paths IPv4 sightings IPv6 sightings AS293 ESNET - ESnet 1,209 6,122 511 AS13335 CLOUDFLARENET - Cloudflare, Inc. 1,027 7,403 331 AS15830 Equinix Equinix (EMEA) Acquisition Enterprises B.V. 309 1,139 185 AS13030 INIT7 Init7 (Switzerland) Ltd. 222 843 313 AS6509 CANARIE-NTN - CANARIE Inc 166 1,129 77 AS9885 NKN-INTERNET-GW - NKN INTERNET GATEWAY NETWORK 97 353 191 AS2603 NORDUNET NORDUnet 85 286 67 AS11537 INTERNET2-RESEARCH-EDU - Internet2 66 126 25 AS17579 KREONET2-AS-KR-KR - KISTI 44 638 24 AS2200 FR-RENATER - Renater 43 548 1 AS2027 MilkyWan MilkyWan Association 29 42 31 AS15169 GOOGLE - Google LLC 23 4,764 585 AS47176 GASCOMCH GAS&COM AG 22 97 13 AS20932 SIG-ST Services Industriels de Geneve 12 35 5 AS15547 NETPLUS netplus.ch SA 11 109 25 AS205112 PHILUNET PHILUNET GmbH 11 52 0 AS43142 AdeliNovius ADELI SAS 10 32 16 AS22335 MREN - Metropolitan Research and Education Network 9 22 0 AS59624 KIAE-COMPUTING-AS National Research Center "Kurchatov Institute" 9 14 7 AS2018 Tertiary Education and Research Network of South Africa - Tertiary Education and Research Network of South Africa 8 453 21 AS42 WOODYNET-1 - WoodyNet, Inc. 6 71 66 AS12350 VTX-NETWORK VTX Services SA 6 54 0 AS10764 STARTAP - University of Illinois 5 8 0 AS21217 SAFEHOSTNET Infrastructure Switzerland Colo Sarl 4 11 1 AS198330 Xefi XEFI LYON SAS 3 11 0 AS15796 SALT-CH Salt Mobile SA 2 2 1 AS21449 ETATGE Etat de Geneve 2 6 1 AS24904 KWAOO K-Net SAS 2 35 2 AS28810 WHO-AS World Health Organization (WHO) 2 2 0 AS61098 exoscale Akenes SA 2 11 3 AS3856 PCH-AS - Packet Clearing House, Inc. 1 1 1 AS6776 THENET TheNet - Internet Services AG 1 12 0 AS12333 DFINET Cheops Technology Switzerland SA 1 6 0 AS20940 AKAMAI-ASN1 Akamai International B.V. 1 2 1 AS25152 K-ROOT-SERVER Reseaux IP Europeens Network Coordination Centre (RIPE NCC) 1 2 2 AS33845 SWISSGOV Swiss Federation represented by FOITT 1 4 1 AS48751 UNOG-AS United Nations Logistics Base 1 2 0 AS60129 CSTI-NET CSTI SA 1 2 2 AS205845 PLANISWARE Planisware SA 1 3 6 AS213317 SIEA SI D ENERGIE ET DE E-COMMUNICATION DE L AIN SIVU 1 1 1
Raw RDAP Response
{
"handle": "AS513",
"startAutnum": 513,
"endAutnum": 513,
"name": "CERN",
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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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[
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"roles": [
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},
{
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"rel": "copyright",
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],
"objectClassName": "entity"
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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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{
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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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{
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}
],
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],
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],
"remarks": [
{
"description": [
"",
"--------- Community Definition -----------",
"513:21357 Prefix to be announced to Akamai",
"513:11344 Prefix to be announced to GCC",
"------------------------------------------"
]
}
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "rdap-up",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-up/AS513",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "rdap-up rdap-active",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-up/AS513?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "rdap-down",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-down/AS513",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "rdap-top",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS513",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/513",
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"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS513?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "rdap-bottom",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-bottom/AS513",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "self",
"href": "https://rdap.db.ripe.net/autnum/513",
"type": "application/rdap+json"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2001-10-22T15:20:40Z"
},
{
"eventAction": "last changed",
"eventDate": "2022-02-17T12:19:18Z"
}
],
"rdapConformance": [
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"rirSearch1",
"autnums",
"cidr0",
"rdap_level_0",
"nro_rdap_profile_0",
"redacted"
],
"notices": [
{
"title": "Filtered",
"description": [
"This output has been filtered."
]
},
{
"title": "Whois Inaccuracy Reporting",
"description": [
"If you see inaccuracies in the results, please visit:"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "inaccuracy-report",
"href": "https://www.ripe.net/contact-form?topic=ripe_dbm&show_form=true",
"type": "text/html"
}
]
},
{
"title": "Source",
"description": [
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"RIPE"
]
},
{
"title": "Terms and Conditions",
"description": [
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],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/513",
"rel": "terms-of-service",
"href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
"type": "application/pdf"
}
]
}
],
"port43": "whois.ripe.net",
"objectClassName": "autnum",
"redacted": [
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='CERN513')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='ORG-CEOf1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='CERN513')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
}
]
} Contact details of private individuals are redacted.