Autonomous system
AS11580 ISLAND-NETWORKS-LTD
Residential ARIN Cable/DSL/ISP
Summary
Island Networks Ltd
isp enterprise legacy
ISLAND-NETWORKS-LTD is Island Networks Ltd, a Jamaican managed-data and connectivity provider based in Kingston. Jamaica sits in ARIN's service region, so the ARIN-registered space is exactly what you would expect.
What it's used for
RIS shows 9 announced IPv4 prefixes and 3,584 addresses, no IPv6, and 2 observed neighbours. Two upstreams against a few thousand addresses is an access provider that buys transit, not a carrier.
The prefix registrants are mostly first-party: 74.116.56.0/22 and its /24 components, plus 72.252.24.0/24, all register to Island Networks Ltd. One of them, 205.164.204.0/22, carries the netname ISLANDNET-CGNT-NET-1 — carrier-grade NAT space. CGNAT is deployed when many subscriber sessions must share scarce public addresses, which is a strong hint that at least part of this AS carries end-user access rather than purely dedicated enterprise circuits, whatever the company's B2B self-description says.
Two prefixes register to other orgs, Hometime (64.112.16.0/22) and Wave (162.254.243.0/24). That is worth naming but not worth convicting on: they are single-RIR, and named-customer or acquired blocks announced by their provider look identical to this. The IP-leasing tell requires several unrelated registrants across multiple RIRs with mailbox addresses, and that combination is not present.
Notable
No PTRs came back on the sampled addresses. That is a sample, not a finding, and no inference is drawn from it. The honest summary is a small Caribbean provider serving business and access customers, with a couple of registrant relationships this evidence cannot fully explain.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 5 prefixes · 3.07K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JM | Jamaica | 5 |
Registry
Allocation record
- Registry
- ARIN
- Registered
- 2005-09-21
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Island Networks Ltd
- Also known as
- Islandnet
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Traffic ratio
- Mostly Outbound
- Peering policy
- Open
- Present at
- 1 exchanges
- Website
- http://www.islandnetjm.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 8 with no ROA
- ROAs
- 0 authorising AS11580
- ASPA
- no ASPA record
- IRR
- 75% registered · 6 of 8 announcements
- Route objects
- 6 naming AS11580
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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