AS9857: the KOGAS-AS-KR KOREA GAS CORPORATION network

AS9857 is an internet Autonomous System operated by KOGAS-AS-KR KOREA GAS CORPORATION (South Korea). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS9857?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS9857 was assigned to KOGAS-AS-KR KOREA GAS CORPORATION by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS9857 currently announces 4 IPv4 block(s), totaling about 2.3 thousand addresses (2,304 in all), registered in South Korea. Services from KOGAS-AS-KR KOREA GAS CORPORATION are reached through these addresses.

What it means to see AS9857 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS9857. That means the other end sits on the KOGAS-AS-KR KOREA GAS CORPORATION 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

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