Autonomous System

AS17936 Cable Television Kani Co.,Ltd.

ISPActiveJapanAPNIC

AS17936 (CTK) is an ISP network operated by Cable Television Kani Co.,Ltd. in Japan, registered with APNIC. It has 5 IPv4 prefixes with 18,432 addresses and 1 IPv6 prefix, which makes it the 7,170th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses18,432in 5 prefixes

IPv6 prefixes1≈ 7.9 × 10²⁸ addresses

Size rank#7,170of 82,200 active ASNs

Abuser scoreLow0.09% of its addresses flagged · method

Details

OrganizationCable Television Kani Co.,Ltd.

AS nameCTK

Websitectk.ne.jp

Country Japan (JP)

Network typeISP

RegistryAPNIC

Abuse contacthostmaster@nic.ad.jp

Registered—

Last updated2024-08-22

IPv4 prefixes

5 prefixes · 18,432 addresses

Network	Addresses	First – last address
125.2.208.0/20	4,096	125.2.208.0 – 125.2.223.255
203.104.112.0/20	4,096	203.104.112.0 – 203.104.127.255
218.40.240.0/20	4,096	218.40.240.0 – 218.40.255.255
218.228.80.0/20	4,096	218.228.80.0 – 218.228.95.255
203.110.224.0/21	2,048	203.110.224.0 – 203.110.231.255

125.2.208.0/20
203.104.112.0/20
218.40.240.0/20
218.228.80.0/20
203.110.224.0/21

IPv6 prefixes

1 prefix

2406:9900::/32

2406:9900::/32

Query AS17936 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.

curl "https://api.ipapi.is/?q=AS17936&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS17936, with or without a key:

curl "https://api.ipapi.is/?q=125.2.208.1"

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