AS9857 KOGAS-AS-KR KOREA GAS CORPORATION

AS9857 (KOGAS-AS-KR) is held by the Korea Gas Corporation (한국가스공사, KOGAS), the South Korean public gas utility headquartered in Daegu. Established by the government in 1983, KOGAS imports and regasifies liquefied natural gas and operates the national high-pressure transmission pipeline network that feeds regional distributors; it remains majority public-sector owned and is listed on the Korea Exchange.

What it's used for

The routing evidence is that of a large utility running its own corporate edge, not a network business. RIS observes nine IPv4 prefixes totalling 2,304 addresses, no IPv6, and only two BGP neighbours. Two upstreams tells you this AS exists for provider-independent multi-homing rather than to sell connectivity onward; a transit or wholesale operator at any size peers with far more than two networks.

The prefixes fall into three clusters. 211.253.204.0/24 through 211.253.207.0/24 and 210.124.209.0/24 through 210.124.211.0/24 are contiguous runs, with 210.124.38.0/24 and 61.36.228.0/24 sitting apart. Contiguous runs announced as individual /24s usually mean a single allocation split across separate sites or security zones, which fits a utility with a headquarters, regasification terminals and pipeline-management facilities spread around the country and each needing its own internet-facing block. The overall footprint, a few thousand addresses behind two upstreams, is a corporate and operational-support network: public web, mail, remote access and business systems, rather than anything customer-facing at scale.

Notable

• KOGAS is one of the world's largest LNG importers, and its network is a public-corporation enterprise network rather than an ISP.
• Despite the size of the organisation, the routed footprint is small and entirely IPv4.