AS33951: the FORWEB Local internet provider city Lodz in Poland network

AS33951 is an internet Autonomous System operated by FORWEB Local internet provider city Lodz in Poland (Poland). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS33951?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS33951 was assigned to FORWEB Local internet provider city Lodz in Poland by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS33951 currently announces 6 IPv4 block(s), totaling about 11 thousand addresses (11,008 in all), registered in Poland. Services from FORWEB Local internet provider city Lodz in Poland are reached through these addresses.

What it means to see AS33951 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS33951. That means the other end sits on the FORWEB Local internet provider city Lodz in Poland network (Poland). 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.