AS211309: the OBOSOPENNET- network

AS211309 is an internet Autonomous System operated by OBOSOPENNET- (Norway). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS211309?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS211309 was assigned to OBOSOPENNET- by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS211309 currently announces 14 IPv4 block(s), totaling about 49.9 thousand addresses (49,920 in all), registered in Norway. Services from OBOSOPENNET- are reached through these addresses.

What it means to see AS211309 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS211309. That means the other end sits on the OBOSOPENNET- network (Norway). 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.