AS2128: the INEX Internet Neutral Exchange Association Company Limited By Guarantee network

AS2128 is an internet Autonomous System operated by INEX Internet Neutral Exchange Association Company Limited By Guarantee (Ireland). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS2128?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS2128 was assigned to INEX Internet Neutral Exchange Association Company Limited By Guarantee by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS2128 currently announces 3 IPv4 block(s), totaling about 1.5 thousand addresses (1,536 in all), registered in Ireland. Services from INEX Internet Neutral Exchange Association Company Limited By Guarantee are reached through these addresses.

What it means to see AS2128 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS2128. That means the other end sits on the INEX Internet Neutral Exchange Association Company Limited By Guarantee network (Ireland). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.