AS31042: the SERBIA-BROADBAND-AS Serbia BroadBand-Srpske Kablovske mreze d.o.o. network

AS31042 is an internet Autonomous System operated by SERBIA-BROADBAND-AS Serbia BroadBand-Srpske Kablovske mreze d.o.o. (Serbia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS31042?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS31042 was assigned to SERBIA-BROADBAND-AS Serbia BroadBand-Srpske Kablovske mreze d.o.o. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS31042 currently announces 22 IPv4 block(s), totaling about 496.4 thousand addresses (496,384 in all), registered in Serbia. Services from SERBIA-BROADBAND-AS Serbia BroadBand-Srpske Kablovske mreze d.o.o. are reached through these addresses.

What it means to see AS31042 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS31042. That means the other end sits on the SERBIA-BROADBAND-AS Serbia BroadBand-Srpske Kablovske mreze d.o.o. 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.