AS9955 CHEONAN-AS-KR Baekseok University

AS9955 (CHEONAN-AS-KR) is registered to Baekseok University, a private Christian university in Cheonan, South Chungcheong Province — which is what the CHEONAN handle refers to: the city the campus sits in, not a regional carrier.

What it's used for

RIS sees 40 announced IPv4 prefixes carrying only 8,448 addresses, no IPv6, and just 2 observed BGP neighbours. The address total is modest for a campus of this size, but the shape is the striking part: 40 announcements for 8k addresses means the space is heavily deaggregated, mostly /23s and /24s, and it is drawn from several unrelated Korean ranges — 211.253/16, 211.229/16, 61.38/16, 61.42/16. Nothing here is a single clean aggregate. That is what an institutional network looks like after two decades of picking up small assignments from its upstream as it grew, then announcing each one separately rather than renumbering.

The two-neighbour count settles the role question: this network buys transit and does not sell it. There is no peering fan-out, no wholesale behaviour, and no third-party customer cone — the addresses terminate at the university's own campus, dormitory and administrative systems.

Notable

• The Baekseok foundation operates more than one school in Cheonan, so some of the scattered blocks plausibly serve affiliated campuses rather than the main university alone.
• Deaggregation at this level (40 announcements, average under a /22 each) is a routing-table cost that a network only accepts when its space genuinely is non-contiguous.