AS44574: the A4N Network Services network

AS44574 is an internet Autonomous System operated by A4N Network Services (the United Kingdom). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS44574?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS44574 was assigned to A4N Network Services by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS44574 currently announces 19 IPv4 block(s), totaling about 88.6 thousand addresses (88,576 in all), registered in the United Kingdom. Services from A4N Network Services are reached through these addresses.

What it means to see AS44574 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS44574. That means the other end sits on the A4N Network Services network (the United Kingdom). 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.