AS9011: the The Patent Office network

AS9011 is an internet Autonomous System operated by The Patent Office (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 AS9011?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS9011 was assigned to The Patent Office by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS9011 currently announces 1 IPv4 block(s), totaling about 8.2 thousand addresses (8,192 in all), registered in the United Kingdom. Services from The Patent Office are reached through these addresses.

What it means to see AS9011 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS9011. That means the other end sits on the The Patent Office 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.