AS9488 SNU-AS-KR Seoul National University

AS9488 (SNU-AS-KR) is held by Seoul National University, South Korea's flagship national research university, whose main campus is in Gwanak-gu, Seoul. The routing evidence lines up exactly with the registry: the space is 147.46.0.0/16 and 147.47.0.0/16, and the sampled reverse DNS resolves under the university's own snu.kr domain.

What it's used for

The AS originates 20 IPv4 prefixes covering 131,072 addresses — two adjacent legacy /16s and eighteen more-specifics carved out of them, mostly /19s with a couple of /24s. That deaggregation pattern is a self-managed campus doing traffic engineering across its own upstreams: the /16 aggregates cover everything, and the /19s let individual campus segments prefer a particular exit path.

Only 4 observed BGP neighbours. That number is the interpretive key here. 131k addresses would be a substantial network for a commercial ISP, and an ISP that size would peer with dozens or hundreds of others; SNU peers with a handful. The address count is a legacy artefact — a pair of class-B blocks issued to a national university early — not evidence of a wholesale role. The AS carries the university's own users, labs, libraries, hospital-adjacent research systems and public web presence, taking transit from Korea's research-and-education upstream rather than buying commercial IP transit at scale.

Notable

• Two contiguous /16s (147.46/16 + 147.47/16 = a de facto /15) is a very large holding for one institution and reflects an early, pre-scarcity allocation.
• No IPv6 prefix is announced, which stands out for a research university of this profile.