IP Judge ipjudge.org

Switzerland · ASN

AS513 · CERN CERN - European Organization for Nuclear Research

CERN CERN - European Organization for Nuclear Research is registered in Switzerland (ARIN). It currently announces 20 IPv4 prefixes (about 354,816 addresses) and 2 IPv6 prefixes in the global routing table; PeeringDB lists it as “Non-Profit”.

Country / region
Switzerland
ARIN
IPv4 addresses
354,816
20 prefixes
IPv6
2
prefixes
Upstream / downstream
12 / 6
neighbours

AI platforms by the network’s registered country; the exit IP’s location is what counts

ChatGPTClaudeGemini

IPs checked on IP Judge datacenter / proxy IPs listed; residential and mobile only counted

No IP from this network has been checked yet.

Neighbouring networks

Upstreams (transit providers)

AS25091 · IP-Max IP-Max SAAS21320 · GEANT_IAS_VRF GEANT VerenigiAS174 · COGENT-174 - Cogent CommunicAS6939 · HURRICANE - Hurricane ElectrAS29222 · Infomaniak-AS Infomaniak NetAS20965 · GEANT GEANT VerenigingAS6730 · SUNRISE Sunrise GmbHAS2907 · SINET-AS - Research OrganizaAS15576 · NTS NTS workspace AGAS559 · Switch SWITCHAS1103 · SURFNET-NL SURF B.V.AS34177 · CELESTE-AS Celeste SAS

Downstreams (networks connected through it)

AS20940 · AKAMAI-ASN1 Akamai InternatiAS28810 · WHO-AS World Health OrganizaAS48751 · UNOG-AS United Nations LogisAS21449 · ETATGE Etat de GeneveAS12654 · RIPE-NCC-RIS-AS Reseaux IP EAS25152 · K-ROOT-SERVER Reseaux IP Eur

IPv4 prefixes 20 total

128.141.0.0/16128.142.0.0/16137.138.0.0/16185.249.56.0/22188.184.0.0/16188.185.0.0/16192.16.155.0/24192.16.156.0/22192.16.160.0/22192.16.164.0/23192.16.166.0/24192.65.183.0/24192.65.184.0/21192.65.192.0/22192.65.196.0/23192.91.236.0/22192.91.240.0/22192.91.244.0/23192.91.246.0/24194.12.128.0/18

IPv6 prefixes 2 total

2001:1458::/322001:1459::/32

Sources: RIPEstat (regional registry allocations and RIS routing data), PeeringDB, IP Judge lookups. Routing data refreshes daily.