AS39238: the OKBPROGRESS Moscow, Russia network

AS39238 is an internet Autonomous System operated by OKBPROGRESS Moscow, Russia (Russia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS39238?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS39238 was assigned to OKBPROGRESS Moscow, Russia by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS39238 currently announces 100 IPv4 block(s), totaling about 51.5 thousand addresses (51,456 in all), registered in Russia. Services from OKBPROGRESS Moscow, Russia are reached through these addresses.

What it means to see AS39238 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS39238. That means the other end sits on the OKBPROGRESS Moscow, Russia 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.