AS21413: the ENVIA-TEL-AS D-09114 Chemnitz network

AS21413 is an internet Autonomous System operated by ENVIA-TEL-AS D-09114 Chemnitz (Germany). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS21413?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS21413 was assigned to ENVIA-TEL-AS D-09114 Chemnitz by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS21413 currently announces 43 IPv4 block(s), totaling about 90.6 thousand addresses (90,624 in all), registered in Germany. Services from ENVIA-TEL-AS D-09114 Chemnitz are reached through these addresses.

What it means to see AS21413 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS21413. That means the other end sits on the ENVIA-TEL-AS D-09114 Chemnitz 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.