AS11580 ISLAND-NETWORKS-LTD

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.