Autonomous system
AS24287 TEIN2-JP National Institute of Informatics
Unclassified APNIC
Summary
National Institute of Informatics
research government academic japan
TEIN2-JP is the autonomous system for the National Institute of Informatics.
What it's used for
- The space carries research and academic traffic, evidenced by the netname
SINET-PI-CIDR-BLK-JPand the holder's identity as a Japanese national research institute. - The AS announces 256 IPv4 addresses and 1 IPv6 prefix, with 4 observed neighbours; this small inventory against a low neighbour count indicates an internal research network rather than a transit or access provider.
Notable
- The registrant for the announced prefix is the Japan Network Information Center (JPNIC), which is consistent with the announcer as JPNIC is the registry for Japanese address space.
- The address inventory consists of a single /24 block and one /48 IPv6 prefix, representing a compact estate typical of a specific institutional site.
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
3 upstream, 3 downstream and 12 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, 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 · 256 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS24287- Registry name
- TEIN2-JP
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 2004-10-19
- Last changed
- 2007-06-22
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 50% valid · 1 valid, 1 with no ROA
- ROAs
- 1 authorising AS24287
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 2 announcements
- Route objects
- 0 naming AS24287
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 1,779 prefixes, as published 2026-10-22. 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