$ query “AS23520” --type=asn → 1 result(s)

AS23520 · LIBERTY-NETWORKS

Columbus Networks USA Inc.

AS23520 is run by Columbus Networks USA Inc. and is a major transit provider, registered in the United States since 2002. The system announces a solid 282 112 IPv4 addresses, including a /16, and supports IPv6. The bulk of its IP address space is in the United States, with additional presence in Colombia and Jamaica, and smaller footprints in 18 additional countries.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #74 by Reach — Top 100 by customer cone size

Basic Information

Country
🇺🇸 United States
Category
Hosting
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
April 02, 2002
Last Changed
March 04, 2026
Last Seen
October 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
113 / 13
IPv6 Prefixes (raw / aggregated)
2 / 2
IPv4 Addresses
282 112
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (89 088 IPs), 🇨🇴 Colombia (65 760 IPs), 🇯🇲 Jamaica (58 112 IPs) and 18 more
Prefix Changed
September 22, 2026

Reputation

Reputation
Good — 2 flagged IPs out of 282 112 total (0.00%)

Connectivity Summary

Upstream Providers
5 upstreams providing transit
Peers
18 networks exchanging traffic without transit
Downstream Customers
174 downstreams buying transit
Unclassified
12 unclassified BGP neighbors
Degree
209 unique BGP neighbors
Reach
930 networks in customer cone

Upstream Providers (5)

  • AS174 — COGENT-174 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS3257 — GTT-BACKBONE (Tier-1 transit)
  • AS6762 — SEABONE-NET (Tier-1 transit)
  • AS6830 — LIBERTYGLOBAL (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (113 total)

  • 69.79.0.0/16 (65 536 addresses (/16 prefix))
  • 72.252.0.0/16 (65 536 addresses (/16 prefix))
  • 190.242.0.0/16 (65 536 addresses (/16 prefix))
  • 63.245.0.0/17 (32 768 addresses (/17 prefix))
  • 67.230.0.0/17 (32 768 addresses (/17 prefix))
  • 190.131.192.0/18 (16 384 addresses (/18 prefix))
  • 138.121.12.0/22 (1 024 addresses (/22 prefix))
  • 143.208.164.0/22 (1 024 addresses (/22 prefix))
  • 181.191.190.0/23 (512 addresses (/23 prefix))
  • 23.249.136.0/24 (256 addresses (/24 prefix))
  • 156.235.73.0/24 (256 addresses (/24 prefix))
  • 156.235.74.0/24 (256 addresses (/24 prefix))
  • 208.169.92.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (2 total)

  • 2607:f438::/32
  • 2803:f950::/32