asn.dev

Autonomous system

AS38641 LEONET-AS Osaka Sangyo University

Unclassified RIPE

IPv4 addresses 65.54K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Osaka Sangyo University

Japan · AI-generated

education university japan

LEONET-AS is the autonomous system for Osaka Sangyo University.

What it's used for

  • The space is registered under the netname JPNIC-NET-JP-ERX with registrant Japan Network Information Center, indicating standard JPNIC allocation for a Japanese institution.
  • The AS announces a single IPv4 prefix, 133.64.0.0/16, comprising 65536 addresses, with 0 IPv6 prefixes and 1 observed neighbour.
  • Traffic from this AS consists of university network activity, including student and staff access, academic research, and administrative services for the institution located in Daitō, Osaka.

Notable

  • The RDAP registrant Japan Network Information Center is the national registry for Japan, which is consistent with the announcer being a Japanese university.
  • The address inventory consists of a single contiguous /16 block, which is a standard allocation size for a mid-sized educational institution in Japan.

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

Full topology · Graph

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.

ASNetworkPaths seen
AS2907Research Organization of Information and Systems, National Institute of Informatics186

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

Shape and geography

IPv4 1 prefixes · 65.54K addresses IPv6 0 prefixes

CountryNamePrefixes
JPJapan1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS38641
Registry name
LEONET-AS
Abuse contact
hostmaster@nic.ad.jp
Registered
2007-08-20
Last changed
2026-07-16
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS38641
ASPA
no ASPA record
IRR
0% registered · 0 of 3 announcements
Route objects
0 naming AS38641

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: 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

Cross-check