Autonomous system
AS58647 KAGAWAU-AS Kagawa University
Unclassified RIPE
Summary
Kagawa University
education university japan research
The AS handle KAGAWAU-AS is held by Kagawa University, a national university located in Takamatsu, Kagawa, Japan.
What it's used for
- The address space is registered under netnames
JPNIC-NET-JP-ERXandKAGAWAU-NET-CIDR-BLK-JP, with registrants listed as the Japan Network Information Center (JPNIC). - The AS announces 73,728 IPv4 addresses across 50 prefixes, while maintaining only 2 observed routing neighbours. This high address-to-neighbour ratio indicates an internal institutional network rather than a transit or access provider.
- Traffic from this AS consists of research, academic, and administrative endpoints for the university's faculty, students, and staff.
Notable
- Registrants for the majority of prefixes are listed as the Japan Network Information Center (JPNIC), which is consistent with the standard allocation process for Japanese educational institutions.
- The address inventory is heavily subdivided into /20, /21, and /22 blocks, reflecting a segmented internal network structure typical of a large university campus.
- The AS was first seen in routing tables in 2012, indicating a relatively recent establishment of its autonomous system.
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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 50 prefixes · 73.73K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 50 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS58647- Registry name
- KAGAWAU-AS
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 2012-07-13
- Last changed
- 2021-11-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 185 with no ROA
- ROAs
- 0 authorising AS58647
- ASPA
- no ASPA record
- IRR
- 100% registered · 185 of 185 announcements
- Route objects
- 3 naming AS58647
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: 431 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