$ query “AS47720” --type=asn → 1 result(s)

AS47720 · CIX-AS

Cork Internet Exchange Limited

AS47720 belongs to Cork Internet Exchange Limited and is a mid-size transit provider, registered in Ireland since 2008. The system announces a respectable 15 872 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in Ireland.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #8 in Ireland — Top 10 by reach within country

Basic Information

Country
🇮🇪 Ireland
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
August 07, 2008
Last Changed
April 30, 2026
Last Seen
April 30, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
14 / 11
IPv6 Prefixes (raw / aggregated)
3 / 3
IPv4 Addresses
15 872
Largest IPv4 Prefix
/20 (4 096 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇮🇪 Ireland (27 760 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
69 networks exchanging traffic without transit
Downstream Customers
8 downstreams buying transit
Unclassified
3 unclassified BGP neighbors
Degree
83 unique BGP neighbors
Reach
13 networks in customer cone

Upstream Providers (3)

Prefix Lists

IPv4 Prefixes (14 total)

  • 217.74.48.0/20 (4 096 addresses (/20 prefix))
  • 84.39.232.0/21 (2 048 addresses (/21 prefix))
  • 89.31.168.0/21 (2 048 addresses (/21 prefix))
  • 91.103.0.0/21 (2 048 addresses (/21 prefix))
  • 185.49.60.0/22 (1 024 addresses (/22 prefix))
  • 185.57.116.0/22 (1 024 addresses (/22 prefix))
  • 185.137.20.0/22 (1 024 addresses (/22 prefix))
  • 185.175.168.0/22 (1 024 addresses (/22 prefix))
  • 185.176.0.0/22 (1 024 addresses (/22 prefix))
  • 45.140.144.0/24 (256 addresses (/24 prefix))
  • 91.223.9.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (3 total)

  • 2a02:2078::/32
  • 2a02:5b20::/32
  • 2607:6b80:3d::/48