AS39046: the THEOREMA St. Petersburg, Russian Federation network

AS39046 is an internet Autonomous System operated by THEOREMA St. Petersburg, Russian Federation (Russia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS39046?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS39046 was assigned to THEOREMA St. Petersburg, Russian Federation by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS39046 currently announces 7 IPv4 block(s), totaling about 4.9 thousand addresses (4,864 in all), registered in Russia. Services from THEOREMA St. Petersburg, Russian Federation are reached through these addresses.

What it means to see AS39046 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS39046. That means the other end sits on the THEOREMA St. Petersburg, Russian Federation 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.