AS9125: the ORIONTELEKOM-AS network

AS9125 is an internet Autonomous System operated by ORIONTELEKOM-AS (Serbia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS9125?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS9125 was assigned to ORIONTELEKOM-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS9125 currently announces 131 IPv4 block(s), totaling about 105.5 thousand addresses (105,472 in all), registered in Serbia. Services from ORIONTELEKOM-AS are reached through these addresses.

What it means to see AS9125 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS9125. That means the other end sits on the ORIONTELEKOM-AS network (Serbia). 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.