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

AS23520 · LIBERTY-NETWORKS

Columbus Networks USA Inc.

AS23520 is operated by Columbus Networks USA Inc. and serves as a major transit provider, established in the United States in 2002. The system announces a solid 285 184 IPv4 addresses, including a /16, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in Guatemala and Colombia, and smaller footprints in 11 additional countries. This AS's prefix announcements have been recently modified.

  • 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
June 22, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
119 / 15
IPv6 Prefixes (raw / aggregated)
2 / 2
IPv4 Addresses
285 184
Largest IPv4 Prefix
/16 (65 536 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇺🇸 United States (165 120 IPs), 🇬🇹 Guatemala (112 656 IPs), 🇨🇴 Colombia (68 352 IPs) and 11 more
Prefix Changed
June 19, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
4 upstreams providing transit
Peers
16 networks exchanging traffic without transit
Downstream Customers
168 downstreams buying transit
Unclassified
5 unclassified BGP neighbors
Degree
193 unique BGP neighbors
Reach
35 230 networks in customer cone

Upstream Providers (4)

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

Prefix Lists

IPv4 Prefixes (119 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))
  • 200.115.160.0/21 (2 048 addresses (/21 prefix))
  • 143.208.164.0/22 (1 024 addresses (/22 prefix))
  • 186.5.128.0/22 (1 024 addresses (/22 prefix))
  • 138.121.12.0/22 (1 024 addresses (/22 prefix))
  • 181.191.190.0/23 (512 addresses (/23 prefix))
  • 156.235.74.0/24 (256 addresses (/24 prefix))
  • 156.235.73.0/24 (256 addresses (/24 prefix))
  • 23.249.136.0/24 (256 addresses (/24 prefix))
  • 208.169.92.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (2 total)

  • 2607:f438::/32
  • 2803:f950::/32