Autonomous system
AS23520 LIBERTY-NETWORKS
Residential ARIN
Summary
Columbus Networks (Flow)
isp residential eyeball cable
Columbus Networks (AS23520) — the network behind Flow, the Caribbean cable/broadband brand of Cable & Wireless (Liberty Latin America).
What it's used for
- Cable and fibre home internet for consumers across the Caribbean (Jamaica, Trinidad and Tobago, Barbados, and other island markets).
Notable
- An "eyeball" network serving residential subscribers across multiple Caribbean nations under the Flow brand.
- Columbus also operates the ARCOS submarine cable ring linking the US, Central America, South America, and the Caribbean.
Interesting
- Columbus Communications merged into Cable & Wireless in 2015; the combined Caribbean consumer operation now trades as Flow.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 6 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Miami | Miami, United States | 198.32.242.179 |
| Digital Realty Atlanta Internet Exchange | Atlanta, United States | 206.126.110.243 |
| PIT Lima - PIT Peru | Lima, Peru | 45.183.47.137 |
| Digital Realty New York Internet Exchange | New York, United States | 206.126.115.79 |
| PIT Colombia - Bogota | Bogota, Colombia | 45.68.24.116 |
| Equinix-LA(former Paix) | Los Angeles, United States | 198.32.242.179 |
Transit providers
8 upstream, 179 downstream and 323 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 154 prefixes · 152K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 156 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS23520- Registry name
- LIBERTY-NETWORKS
- Registrant
- Columbus Networks USA, Inc.
- Abuse contact
- rafael.espinosa@libertynet.com
- Registered
- 2002-04-02
- Last changed
- 2024-12-03
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 73% valid · 84 valid, 31 with no ROA
- ROAs
- 96 authorising AS23520
- ASPA
- no ASPA record
- IRR
- 97% registered · 111 of 115 announcements
- Route objects
- 1,159 naming AS23520
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 445 networks and 1,817 prefixes, as published 2026-10-27. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere