AS41754: the ERTH-PENZA-AS network

AS41754 is an internet Autonomous System operated by ERTH-PENZA-AS (Russia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS41754?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS41754 was assigned to ERTH-PENZA-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS41754 currently announces 19 IPv4 block(s), totaling about 48.6 thousand addresses (48,640 in all), registered in Russia. Services from ERTH-PENZA-AS are reached through these addresses.

What it means to see AS41754 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS41754. That means the other end sits on the ERTH-PENZA-AS network (Russia). 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.