AS17957
SOUTH TOKYO CABLETELEVISION
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Isp allocation +5
- Trust score 70 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 210.191.128.0/19 | 8.2K |
82.9%
|
SOUTH TOKYO CABLETELEVISION | JP | — | — |
| 219.103.96.0/20 | 4.1K |
83.9%
|
SOUTH TOKYO CABLETELEVISION | JP | — | — |
| 49.236.232.0/21 | 2.0K |
98.6%
|
SOUTH TOKYO CABLETELEVISION | JP | Tokyo | Togoshi |
| 115.165.184.0/21 | 2.0K |
96.8%
|
SOUTH TOKYO CABLETELEVISION | JP | — | — |
| 202.122.24.0/21 | 2.0K |
94.9%
|
SOUTH TOKYO CABLETELEVISION | JP | — | — |
| 110.232.236.0/22 | 1.0K |
94.1%
|
SOUTH TOKYO CABLETELEVISION | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS17957 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 210.191.128.0/19 | 4,845 | 2026-07-29 00:57:02 |
| 219.103.96.0/20 | 4,817 | 2026-07-29 00:57:08 |
| 110.232.236.0/22 | 4,817 | 2026-07-29 00:56:48 |
| 49.236.232.0/21 | 4,784 | 2026-07-29 00:57:15 |
| 115.165.184.0/21 | 4,740 | 2026-07-29 00:57:27 |
| 202.122.24.0/21 | 4,734 | 2026-07-29 00:57:27 |
Frequently Asked Questions
What is AS17957?
AS17957 is an Autonomous System Number assigned to SOUTH TOKYO CABLETELEVISION. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS17957 announce?
AS17957 announces 19.5K IPv4 addresses distributed across 6 routed CIDR prefixes. The network is registered in Japan.
Who operates AS17957?
AS17957 is operated by SOUTH TOKYO CABLETELEVISION. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS17957 registered in?
AS17957 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
