AS18028: the GSNU-AS-KR GyeongSang National University network

AS18028 is an internet Autonomous System operated by GSNU-AS-KR GyeongSang National University (South Korea). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS18028?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS18028 was assigned to GSNU-AS-KR GyeongSang National University by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS18028 currently announces 18 IPv4 block(s), totaling about 30.7 thousand addresses (30,720 in all), registered in South Korea. Services from GSNU-AS-KR GyeongSang National University are reached through these addresses.

What it means to see AS18028 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS18028. That means the other end sits on the GSNU-AS-KR GyeongSang National University 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.