Autonomous system
AS10014 NIHON-U Nihon University
Education APNIC
Summary
Nihon University
NIHON-U is Nihon University (日本大学), one of the largest private universities in Japan, with faculties spread across Tokyo, Chiba, Kanagawa, Fukushima and Shizuoka. AS10014 is the university's own campus network.
What it's used for
Campus networking. The AS announces exactly one IPv4 prefix — 133.43.0.0/16, 65,536 addresses — and one IPv6 /48 (2001:df6:8000::/48). That is the classic university footprint: a single large legacy block, held since the era when a /16 was an ordinary academic allocation, carrying student and staff devices, lab and research machines, library systems, and the public-facing web and mail servers of dozens of faculties.
Notable
Education, and the routing settles it. The 133.x range is the block JPNIC historically handed to Japanese universities and research institutes, and Nihon University sits in the middle of it. The neighbour count corroborates: 3 observed BGP neighbours on 65k addresses is a stub network with a small number of upstreams — most likely a commercial ISP alongside the national academic backbone. A commercial network holding a /16 would peer far more widely; an eyeball ISP of that size would peer at exchanges. This one just wants a default route out.
The spec warning that "University in a legal name does not mean education" is worth stating and then dismissing here: in this case the name, the address block, the single aggregate and the stub topology all agree.
Interesting
The sampled addresses returned no PTRs, which says nothing either way — it was a two-address sample of a /16, not a survey. Build no inference on it.
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 1 prefixes · 65.54K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS10014- Registry name
- NIHON-U
- Registered
- 2000-04-27
- Last changed
- 2010-12-06
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS10014
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 2 announcements
- Route objects
- 0 naming AS10014
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: 442 networks and 1,771 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