Autonomous system
AS18087 TOYO Toyo University
Unclassified APNIC
Summary
Toyo University
education university japan
The AS handle TOYO is held by Toyo University.
What it's used for
- The address space is registered under the netname
JPNIC-NET-JP-ERXwith the Japan Network Information Center, indicating a standard academic allocation in Japan. - The AS announces 65,536 IPv4 addresses across 5 prefixes and 5 IPv6 prefixes, while maintaining only 2 observed neighbours. This high address-to-neighbour ratio is characteristic of an access or eyeball network serving a specific campus community rather than a transit provider.
Notable
- All five announced IPv4 prefixes list the Japan Network Information Center as the registrant, which is consistent with the AS holder being a Japanese educational institution.
- The address inventory is concentrated within the 133.79.0.0/17 block, subdivided into five distinct prefixes ranging from /17 to /20, suggesting internal segmentation for different campus facilities or departments.
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 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 5 prefixes · 65.54K addresses IPv6 5 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 10 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS18087- Registry name
- TOYO
- Registered
- 2001-12-27
- Last changed
- 2017-02-16
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 5 with no ROA
- ROAs
- 0 authorising AS18087
- ASPA
- no ASPA record
- IRR
- 80% registered · 4 of 5 announcements
- Route objects
- 2 naming AS18087
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: 440 networks and 1,773 prefixes, as published 2026-10-13. 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