Autonomous system
AS18026 CHEJU-AS-KR JEJU NATIONAL UNIVERSITY
Unclassified APNIC
Summary
Jeju National University
education university korea
CHEJU-AS-KR is the autonomous system for Jeju National University, a public research university located in South Korea.
What it's used for
- The address space is registered under netnames
CHEJU-NET-KRandKREN-KR, with registrants listed asIRT-KRNIC-KR, indicating allocation through the Korea Internet & Security Agency. - The AS announces 20,224 IPv4 addresses across 16 prefixes, with only 4 observed routing neighbours; this high address-to-neighbour ratio is characteristic of an access or eyeball network serving a specific institutional campus rather than a transit provider.
Notable
- Registrants for all listed prefixes are
IRT-KRNIC-KR, which aligns with the AS holder identity of Jeju National University. - The inventory consists of 16 IPv4 prefixes with no IPv6 prefixes in the current inventory, ranging from a /19 block to multiple /24 blocks.
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.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 16 prefixes · 20.22K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 16 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS18026- Registry name
- CHEJU-AS-KR-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 2002-12-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 17 with no ROA
- ROAs
- 0 authorising AS18026
- ASPA
- no ASPA record
- IRR
- 100% registered · 17 of 17 announcements
- Route objects
- 26 naming AS18026
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 442 networks and 1,772 prefixes, as published 2026-10-15. 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