AS63781 Kobayashi Family Net
AS63781 is operated by Kobayashi Family Net and registered with APNIC (JP) since 2014-08-25.
It announces 2 IPv4 and 1 IPv6 prefixes, 100% of them RPKI valid.
RIPE RIS sees 4 upstream and peer networks and 0 downstream networks next to it.
PeeringDB lists it as an Educational/Research network at 1 internet exchange. Its peering policy is selective.
| Name | Kobayashi Family Net |
|---|---|
| Registry handle | KFNET-AS |
| Registry (RIR) | APNIC |
| Country | Japan (JP) |
| Delegated on | 2014-08-25 |
| Network type | Educational/Research, Asia Pacific |
| Peering policy | Selective |
| IRR as-set | AS63781:AS-KFNET-JP |
| Prefixes (IPv4 / IPv6) | 2 / 1 |
| RPKI valid | 100% (3 / 3) |
| Upstreams and peers | 4 |
| Downstream networks | 0 |
| Website | kobayashi.gr.jp |
Routing health
- AS63781 announces 2 IPv4 and 1 IPv6 prefixes.
- All 3 announced prefixes are RPKI valid.
- 4 upstreams and peers, 0 downstream networks seen.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 3
- 103.143.136.0/24
- 103.143.137.0/24
- 2405:5340::/32
Upstreams and peers 4
The networks RIPE RIS sees next to AS63781 in BGP paths, the most visible first.
Peering
Peering policy: Selective. Suggested max-prefix limits: 2 IPv4, 1 IPv6. PeeringDB record
| Exchange | Ports | Speed | Route server |
|---|---|---|---|
| ENTERNET IX | 2 | 2G | No |
More about AS63781
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-15 15:21 UTC. The country is where the AS number was registered, not necessarily where the network operates.