Autonomous system
AS63781 KFNET-AS Kobayashi Family Net LLP
Unclassified APNIC Educational/Research
Summary
Kobayashi Family Net
education research academic
KFNET-AS is operated by Kobayashi Family Net LLP.
What it's used for
- The address space is registered under the netname
KFNET-CIDR-BLK-JPwith the Japan Network Information Center. - The AS announces 512 IPv4 addresses and 1 IPv6 prefix, maintaining 4 observed routing neighbours.
- As an educational and research network, the traffic consists of academic users, research systems, and institutional endpoints.
Notable
- The registrant for the announced prefix is the Japan Network Information Center, consistent with the Japanese academic network infrastructure.
- The address inventory consists of a single IPv4 block and one IPv6 prefix, typical for a small-scale academic or research institution.
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 2026-10-18, 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 · 512 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS63781- Registry name
- KFNET-AS
- Registered
- 2014-08-25
- Last changed
- 2019-12-25
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Kobayashi Family Net
- Also known as
- KFNET-JP
- Network type
- Educational/Research
- Scope
- Asia Pacific
- Traffic ratio
- Mostly Inbound
- Peering policy
- Selective
- IRR as-set
AS63781:AS-KFNET-JP- Present at
- 1 exchanges
- Website
- https://kobayashi.gr.jp
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 3 valid, 0 with no ROA
- ROAs
- 3 authorising AS63781
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 3 announcements
- Route objects
- 0 naming AS63781
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: 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