AS9754 CSU-AS CHOSUN UNIVERSITY

AS9754 (CSU-AS) belongs to Chosun University, a large private university in the Dong-gu district of Gwangju, South Korea, with a student body in the tens of thousands. The CSU handle is the university's own abbreviation and should not be confused with any similarly-abbreviated institution elsewhere.

What it's used for

This is a campus network with an unusually fragmented announcement pattern: 101 IPv4 prefixes covering 24,832 addresses, no IPv6, and 2 observed BGP neighbours. The prefixes come from just three ranges of KRNIC-allocated space — 203.237.96.0/19, 220.67.192.0/19, and 117.16.0.0/20 plus 117.16.16.0/20 — broken into a long tail of /24s (220.67.213.0/24, 203.237.114.0/24, 117.16.31.0/24 and dozens more). Announcing a /19 alongside nearly every /24 inside it is a campus splitting its address plan per department, building or lab and originating each block in its own right.

The neighbour count rules out any provider reading of those 101 prefixes. Two adjacencies means the university buys transit and sells nothing: no customer cone, no peering programme. The space is the institution's own, held from Korea's early academic allocations and used for faculties, residences, labs and public-facing services.

Notable

• The three parent ranges reflect allocations picked up at different times as the campus grew, not space acquired from third parties.
• Heavy per-/24 deaggregation on a campus is usually about internal routing policy and traffic engineering across uplinks rather than anything external.
• Korean universities of this vintage typically reach the internet through the national research network plus a commercial carrier, giving them large address holdings and very little peering breadth — precisely the shape seen here.