AS23780 CTB Media Inc.
AS23780 is operated by CTB Media Inc. and registered with APNIC (JP) since 2003-06-16.
It announces 6 IPv4 and 1 IPv6 prefixes, 100% of them RPKI valid.
RIPE RIS sees 14 upstream and peer networks and 0 downstream networks next to it.
PeeringDB lists it as a Cable/DSL/ISP network at 10 internet exchanges and 2 facilities. Its peering policy is open.
| Name | CTB Media Inc. |
|---|---|
| Registry handle | CTB |
| Registry (RIR) | APNIC |
| Country | Japan (JP) |
| Delegated on | 2003-06-16 |
| Network type | Cable/DSL/ISP, Asia Pacific |
| Peering policy | Open |
| IRR as-set | AS-23780 |
| Prefixes (IPv4 / IPv6) | 6 / 1 |
| RPKI valid | 100% (7 / 7) |
| Upstreams and peers | 14 |
| Downstream networks | 0 |
| Website | ctb.jp |
Routing health
- AS23780 announces 6 IPv4 and 1 IPv6 prefixes.
- All 7 announced prefixes are RPKI valid.
- 14 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 7
- 49.128.24.0/21
- 49.128.96.0/22
- 126.52.96.0/22
- 203.201.52.0/22
- 211.15.112.0/20
- 211.19.224.0/19
- 2402:6c80::/32
Upstreams and peers 14
The networks RIPE RIS sees next to AS23780 in BGP paths, the most visible first.
Peering
Peering policy: Open. Suggested max-prefix limits: 6 IPv4, 1 IPv6. PeeringDB record
| Exchange | Ports | Speed | Route server |
|---|---|---|---|
| BBIX Amsterdam | 1 | 300M | Yes |
| BBIX Fukuoka | 1 | 10G | Yes |
| BBIX Hong Kong | 1 | 300M | Yes |
| BBIX Osaka | 2 | 20G | Yes |
| BBIX Singapore | 1 | 300M | Yes |
| BBIX Tokyo | 1 | 10G | Yes |
| BBIX US-West | 1 | 300M | Yes |
| JPNAP Fukuoka | 1 | 10G | Yes |
| JPNAP Osaka | 1 | 10G | Yes |
| JPNAP Tokyo: Peering | 1 | 10G | Yes |
| Facility | City | Country |
|---|---|---|
| NTT DATA Dojima (building #4) | Osaka | JP |
| QTnet Fukuoka Data Center 3(QD3) | Fukuoka | JP |
More about AS23780
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-12 16:35 UTC. The country is where the AS number was registered, not necessarily where the network operates.