AS9774 DSU-AS Dongseo University

AS9774 (DSU-AS) is held by Dongseo University, a private university in Sasang-gu, Busan. This is the campus network — students, faculty, laboratories and the university's public-facing systems.

What it's used for

The routing evidence is unusually clean for a university. RIS shows 5,120 IPv4 addresses in just two prefixes: 203.241.176.0/20 and 202.165.56.0/22. That is the whole announcement — no de-aggregation, no more-specifics, no scattered /24s. Behind them sits one observed BGP neighbour.

Two aggregates and a single upstream is what a campus looks like when it takes connectivity from the national research-and-education network and has never needed to split traffic across carriers. The absence of more-specific announcements is itself informative: networks de-aggregate in order to steer inbound traffic between multiple upstreams, and a campus with one upstream has nothing to steer. A /20 plus a /22 also sizes about right for a mid-sized private university that has moved most of its dormitory and lab addressing behind NAT and keeps public addresses for servers and a handful of routed segments.

There is no transit role here, no hosting business and no customer allocation — a wholesale carrier on 5k addresses would peer with hundreds of ASes rather than one. No IPv6 is announced from this ASN.

Notable

• The two prefixes come from unrelated ranges, which is typical of a Korean campus that received an early allocation and a later top-up rather than one contiguous grant.