Autonomous system
AS18124 OUS-NET Okayama University of Science
Unclassified RIPE
Summary
Okayama University of Science
education university japan
The AS handle OUS-NET is held by Okayama University of Science.
What it's used for
- The address space is registered under the netname
JAPAN150with the Japan Network Information Center, indicating a standard allocation for a Japanese institution. - The AS announces 65,536 IPv4 addresses across 6 prefixes and 1 IPv6 prefix, while maintaining only 2 observed neighbours. This high address-to-neighbour ratio is characteristic of an access or eyeball network, consistent with a university campus providing connectivity to students and staff.
Notable
- All six announced IPv4 prefixes are registered to
IRT-JPNIC-JP(Japan Network Information Center) under the netnameJAPAN150, which aligns with the registry holder Okayama University of Science. - The address inventory consists of contiguous blocks within the 150.55.0.0/16 range, subdivided into /17, /18, /19, /20, and /21 prefixes, suggesting internal segmentation of the university's network estate.
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 6 prefixes · 65.54K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 7 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS18124- Registry name
- OUS-NET
- Registered
- 2002-03-21
- Last changed
- 2022-10-13
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 11 with no ROA
- ROAs
- 0 authorising AS18124
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 2 naming AS18124
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