AS12657: the BAYCIX Benzstr. 13 network

AS12657 is an internet Autonomous System operated by BAYCIX Benzstr. 13 (Germany). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS12657?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS12657 was assigned to BAYCIX Benzstr. 13 by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS12657 currently announces 3 IPv4 block(s), totaling about 24.6 thousand addresses (24,576 in all), registered in Germany. Services from BAYCIX Benzstr. 13 are reached through these addresses.

What it means to see AS12657 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS12657. That means the other end sits on the BAYCIX Benzstr. 13 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.