Autonomous system
AS18267 DOSHISHA Doshisha University
Unclassified RIPE
Summary
Doshisha University
education university japan
The AS handle DOSHISHA is operated by Doshisha University.
What it's used for
- The address space is registered under the netname
DONET-CIDR-BLK-JPwith the Japan Network Information Center, indicating it is part of the Japanese academic and research network infrastructure. - The AS announces 20,480 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining only 1 observed neighbour, a ratio characteristic of an isolated educational or institutional network rather than a transit provider.
Notable
- The registrants for both announced IPv4 prefixes are listed as the Japan Network Information Center, which is consistent with the holder being a Japanese educational institution.
- The inventory consists of two distinct IPv4 blocks, 202.23.128.0/18 and 202.11.192.0/20, alongside a single IPv6 prefix, 2001:df7:a800::/48.
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
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS2907 | Research Organization of Information and Systems, National Institute of Informatics | 158 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 20.48K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS18267- Registry name
- DOSHISHA
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 2002-07-01
- Last changed
- 2023-12-20
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 3 with no ROA
- ROAs
- 0 authorising AS18267
- ASPA
- no ASPA record
- IRR
- 67% registered · 2 of 3 announcements
- Route objects
- 2 naming AS18267
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: 448 networks and 1,849 prefixes, as published 2026-10-29. 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