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Network report

Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.

IP address, prefix or AS number

AS63781 · 

curl -s "https://thenetworkery.com/api/v1/network-report?query=AS63781"
JSON Docs

Warning: AS63781 (KFNET-AS) announces 2 IPv4 and 1 IPv6 prefixes. 2 warnings

AS pageAS63781
HolderKFNET-AS - Kobayashi Family Net LLP
AllocationAPNIC, Japan (JP), allocated 2014-08-25
Prefixes (IPv4 / IPv6)2 / 1
RPKI valid100% (3 / 3)
Upstreams and peers4
Peering policySelective

What to fix

  1. Warning

    No abuse contact is published for AS63781.

    Other networks send reports of spam, attacks and hacked machines to the abuse contact. Without one, reports go nowhere and blocklists may list the whole range.

    Fix: Add an abuse contact to the registration: abuse-c in the RIPE database, an Abuse POC at ARIN, an abuse mailbox (IRT) at APNIC, AFRINIC or LACNIC.

    Open in WHOIS / RDAP lookup

  2. Warning

    No public NOC, policy or technical contact.

    Other networks use these addresses to set up peering and to reach you during an incident.

    Fix: Add a role contact (for example noc@ or peering@ an address you monitor) with visibility Public.

    Open in PeeringDB lookup

Checks

Routing and RPKI AS63781 announces 2 IPv4 and 1 IPv6 prefixes.
  • Pass: AS63781 announces 2 IPv4 and 1 IPv6 prefixes.
  • Pass: All 3 announced prefixes are RPKI valid.
  • Pass: Every announced prefix has an IRR route object.
  • Info: 4 upstreams and peers, 0 downstream networks seen.
HolderKFNET-AS - Kobayashi Family Net LLP
IPv4 prefixes2
IPv6 prefixes1
RPKI3 valid
Downstream networks0

Upstreams and peers seen to the left 4

AS59105 Home NOC Operators Group AS38074 SDCC OpenNetwork AS59103 SOFTETHER AS63798 IPA-ENTERNET

Announced prefixes 3

103.143.136.0/24 103.143.137.0/24 2405:5340::/32

Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru

Open in ASN & BGP prefix lookup
Registration No abuse contact is published for AS63781.
  • Pass: Found at rdap.apnic.net.
  • Warning: No abuse contact is published for AS63781.
NameKFNET-AS
HandleAS63781
RangeAS63781
CountryJP
Statusactive
Last changed2019-12-25T02:18:25Z
Allocation
Registry (RIR)APNIC
CountryJapan (JP)
Delegated on2014-08-25
StatusAllocated
Delegated rangeAS63770 – AS63809

Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.

Contacts
RoleNameEmail
administrative, technical Japan Network Information Center hostmaster@nic.ad.jp
administrative, technical JP00182424

Source: https://rdap.apnic.net/autnum/63781. Registration data from rdap.apnic.net, shown under its terms of use (terms): not for marketing or bulk collection.

Open in WHOIS / RDAP lookup
PeeringDB No public NOC, policy or technical contact.
  • Pass: AS63781 is in PeeringDB as Kobayashi Family Net.
  • Info: Peering policy: Selective.
  • Info: Present at 1 internet exchanges with 2 ports (2G in total).
  • Warning: No public NOC, policy or technical contact.
NetworkKobayashi Family Net (KFNET-JP)
AS numberAS63781
TypeEducational/Research, Asia Pacific
Websitehttps://kobayashi.gr.jp
IRR as-setAS63781:AS-KFNET-JP
Prefixes (IPv4 / IPv6)2 / 1
Traffic10-20Gbps, Mostly Inbound
Peering policySelective
LocationsNot Required
Ratio requiredNo
ContractsNot Required
Last updated2025-02-19

Source: PeeringDB. Results are cached for an hour.

Open in PeeringDB lookup