AS9848: the SEJONGTELECOM-AS-KR SEJONG NETWORKS network

AS9848 is an internet Autonomous System operated by SEJONGTELECOM-AS-KR SEJONG NETWORKS (South Korea). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS9848?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS9848 was assigned to SEJONGTELECOM-AS-KR SEJONG NETWORKS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS9848 currently announces 318 IPv4 block(s), totaling about 798.5 thousand addresses (798,530 in all), registered in South Korea. Services from SEJONGTELECOM-AS-KR SEJONG NETWORKS are reached through these addresses.

What it means to see AS9848 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS9848. That means the other end sits on the SEJONGTELECOM-AS-KR SEJONG NETWORKS 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.