$ query “AS513” --type=asn → 1 result(s)

AS513 · CERN (CERN ⚛️)

CERN - European Organization for Nuclear Research

AS513 belongs to CERN - European Organization for Nuclear Research and is a mid-size transit provider, registered in Switzerland since 2001. The system announces a solid 354 816 IPv4 addresses, including a /15, and supports IPv6. Its primary geographic footprint is in Switzerland.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇨🇭 Switzerland
Category
Education/Research
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
October 22, 2001
Last Changed
March 04, 2026
Last Seen
June 27, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
20 / 19
IPv6 Prefixes (raw / aggregated)
2 / 1
IPv4 Addresses
354 816
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/31
Geolocated Countries
🇨🇭 Switzerland (707 840 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
6 upstreams providing transit
Peers
40 networks exchanging traffic without transit
Downstream Customers
6 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
53 unique BGP neighbors
Reach
20 networks in customer cone

Upstream Providers (6)

Prefix Lists

IPv4 Prefixes (20 total)

  • 188.184.0.0/15 (131 072 addresses (/15 prefix))
  • 128.142.0.0/16 (65 536 addresses (/16 prefix))
  • 137.138.0.0/16 (65 536 addresses (/16 prefix))
  • 128.141.0.0/16 (65 536 addresses (/16 prefix))
  • 194.12.128.0/18 (16 384 addresses (/18 prefix))
  • 192.65.184.0/21 (2 048 addresses (/21 prefix))
  • 192.65.192.0/22 (1 024 addresses (/22 prefix))
  • 192.16.160.0/22 (1 024 addresses (/22 prefix))
  • 192.16.156.0/22 (1 024 addresses (/22 prefix))
  • 192.91.236.0/22 (1 024 addresses (/22 prefix))
  • 192.91.240.0/22 (1 024 addresses (/22 prefix))
  • 185.249.56.0/22 (1 024 addresses (/22 prefix))
  • 192.16.164.0/23 (512 addresses (/23 prefix))
  • 192.65.196.0/23 (512 addresses (/23 prefix))
  • 192.91.244.0/23 (512 addresses (/23 prefix))
  • 192.16.166.0/24 (256 addresses (/24 prefix))
  • 192.65.183.0/24 (256 addresses (/24 prefix))
  • 192.16.155.0/24 (256 addresses (/24 prefix))
  • 192.91.246.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (2 total)

  • 2001:1458::/31