Autonomous system
AS9321 HYUNET-AS Hanyang University
Education APNIC
Summary
Hanyang University
education university research legacy
AS9321 (HYUNET-AS) is held by Hanyang University, a private university in Seoul, South Korea. The ASN carries HYUnet, the university's campus network.
What it's used for
The evidence is that of a single-institution network with a large legacy allocation. RIS sees 17 IPv4 prefixes carrying 65,536 addresses, no IPv6, and just 1 observed BGP neighbour. One neighbour means the campus is effectively single-homed: it buys transit from one Korean upstream and originates nothing but its own space. There is no peering breadth, no downstream customers, and no sign of any commercial role.
The prefix list makes the structure obvious. Hanyang holds the whole of 166.104.0.0/16 and announces it both as the covering /16 and as sixteen /20s that tile the block exactly — 166.104.0.0/20, 166.104.16.0/20, 166.104.32.0/20 and so on through 166.104.240.0/20. A complete, evenly-sized tiling like that is not organic growth; it is a deliberate deaggregation of one allocation, typically done to steer traffic or to keep more specifics reachable if the aggregate is filtered. Everything in the ASN serves one campus: faculty and student access, departmental servers, and university-run services.
Notable
- A full
/16for a single university is a mark of an early allocation, from a period when Korean institutions received far more IPv4 than they would today. - No IPv6 is announced from this ASN.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS9318 | SK Broadband Co Ltd | 1,037 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 65.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 1 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9321- Registry name
- HYUNET-AS-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 1998-06-03
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 17 with no ROA
- ROAs
- 0 authorising AS9321
- ASPA
- no ASPA record
- IRR
- 100% registered · 17 of 17 announcements
- Route objects
- 43 naming AS9321
Reputation
Classification and threat
Education University, school or national research and education network.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 432 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere