Autonomous system
AS2504 NCA5 Kyoto University
Education APNIC
Summary
Kyoto University
education university research legacy
This network (NCA5) belongs to Kyoto University, one of Japan's leading national research universities.
What it's used for
- Campus, research, and administrative networking for the university in Kyoto.
Notable
- An institutional research-university network rather than a commercial ISP or host. The low AS number reflects an early Japanese-internet allocation.
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 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS2907 | Research Organization of Information and Systems, National Institute of Informatics | 246 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 132K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 4 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS2504- Registry name
- NCA5
- Registered
- 2002-04-05
- Last changed
- 2018-12-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 25% valid · 1 valid, 3 with no ROA
- ROAs
- 2 authorising AS2504
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 4 announcements 1 other origin
- Route objects
- 4 naming AS2504
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 1,784 prefixes, as published 2026-10-19. 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