AS210331: the AS210331 - FIRAT SENEM network

AS210331 is an internet Autonomous System operated by AS210331 - FIRAT SENEM (Turkey). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS210331?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS210331 was assigned to AS210331 - FIRAT SENEM by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS210331 currently announces 3 IPv4 block(s), totaling 768 addresses (768 in all), registered in Turkey. Services from AS210331 - FIRAT SENEM are reached through these addresses.

What it means to see AS210331 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS210331. That means the other end sits on the AS210331 - FIRAT SENEM network (Turkey). 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.