AS45374: the CCS-AS-KR CCS network

AS45374 is an internet Autonomous System operated by CCS-AS-KR CCS (South Korea). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS45374?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS45374 was assigned to CCS-AS-KR CCS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS45374 currently announces 26 IPv4 block(s), totaling about 63 thousand addresses (62,976 in all), registered in South Korea. Services from CCS-AS-KR CCS are reached through these addresses.

What it means to see AS45374 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS45374. That means the other end sits on the CCS-AS-KR CCS network (South Korea). 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.