AS208183: the ROOTUNDGUESTIG Simon Terzenbach network

AS208183 is an internet Autonomous System operated by ROOTUNDGUESTIG Simon Terzenbach (Germany). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS208183?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS208183 was assigned to ROOTUNDGUESTIG Simon Terzenbach by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS208183 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in Germany. Services from ROOTUNDGUESTIG Simon Terzenbach are reached through these addresses.

What it means to see AS208183 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS208183. That means the other end sits on the ROOTUNDGUESTIG Simon Terzenbach network (Germany). 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.