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What is an ASN? Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.
The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS17957 at robtex .
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Stub AS
Stub AS Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more. Traceroute →
$ traceroute -a -n -q1 -f3 -m17 202.122.26.99
traceroute to 202.122.26.99 (202.122.26.99 ): 17 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Montreal, CA
On November 6, 2026
Neighbours by global rank Log scale. The dashed line marks this network.
Powered by IP to ASN data Netblock Company Num of IPs SOUTH TOKYO CABLETELEVISION
8,192 SOUTH TOKYO CABLETELEVISION
4,096 SOUTH TOKYO CABLETELEVISION
2,048 SOUTH TOKYO CABLETELEVISION
2,048 SOUTH TOKYO CABLETELEVISION
2,048 SOUTH TOKYO CABLETELEVISION
1,024
Powered by IP Ranges data
There are 1 peers for this ASN.
ASN Name Rank AS9365 its communications Inc. #506
There are 1 upstreams for this ASN.
ASN Name Rank AS9365 its communications Inc. #506
There are 0 downstreams for this ASN.
No downstreams found.
Important routers in AS17957 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 100%
Held location over 1 year 95%
Median days between moves 306 days
Geolocation scope City How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.
There are 2 domain names hosted across 1 IP addresses on this ASN.
14 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
IP Address ASN Details 202.122.24.1 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.28ms from Tokyo, JP 219.103.97.44 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.45ms from Tokyo, JP 49.236.232.1 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.10ms from Tokyo, JP 49.236.237.1 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.27ms from Tokyo, JP 49.236.235.1 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.10ms from Tokyo, JP 219.103.99.193 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.34ms from Tokyo, JP 219.103.96.14 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.15ms from Tokyo, JP 210.191.159.1 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.15ms from Tokyo, JP 49.236.234.1 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.15ms from Tokyo, JP 49.236.233.1 Ping AS17957 SOUTH TOKYO CABLETELEVISION #25,611 1.29ms from Tokyo, JP
Show more
A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
Times shown in Japan local time (UTC+9). Less More
Peak hour 22:00–23:00
Active hours 24 hrs (around the clock)
Weekend vs weekday weekends heavier
Busiest day Sun
Network type Consumer ISP
Geography Japan 
