AS15924: the BORUSANTELEKOM-AS network

AS15924 is an internet Autonomous System operated by BORUSANTELEKOM-AS (Turkey). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS15924?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS15924 was assigned to BORUSANTELEKOM-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS15924 currently announces 246 IPv4 block(s), totaling about 323.6 thousand addresses (323,584 in all), registered in Turkey. Services from BORUSANTELEKOM-AS are reached through these addresses.

What it means to see AS15924 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS15924. That means the other end sits on the BORUSANTELEKOM-AS network (Turkey). 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.