Autonomous System

AS131923 MCAT Ltd.

BusinessActiveJapanJPNIC

AS131923 (MCAT) is a business network operated by MCAT Ltd. in Japan, registered with JPNIC. It has 10 IPv4 prefixes with 22,528 addresses and 1 IPv6 prefix, which makes it the 6,418th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses22,528in 10 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#6,418of 82,200 active ASNs
Abuser scoreVery Low0.03% of its addresses flagged · method

Details

OrganizationMCAT Ltd.
AS nameMCAT
Websitemcat.co.jp
Country Japan (JP)
Network typeBusiness
RegistryJPNIC
Abuse contacthostmaster@idnic.net
Registered—
Last updated2023-04-10

IPv4 prefixes

10 prefixes · 22,528 addresses
NetworkAddressesFirst – last address
218.45.64.0/198,192218.45.64.0 – 218.45.95.255
120.50.192.0/204,096120.50.192.0 – 120.50.207.255
133.247.240.0/204,096133.247.240.0 – 133.247.255.255
133.247.136.0/212,048133.247.136.0 – 133.247.143.255
103.95.104.0/221,024103.95.104.0 – 103.95.107.255
133.88.88.0/221,024133.88.88.0 – 133.88.91.255
219.100.156.0/221,024219.100.156.0 – 219.100.159.255
133.88.92.0/23512133.88.92.0 – 133.88.93.255
133.88.87.0/24256133.88.87.0 – 133.88.87.255
133.88.94.0/24256133.88.94.0 – 133.88.94.255

IPv6 prefixes

1 prefix
  • 2401:5ac0::/32

Query AS131923 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=AS131923&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS131923, with or without a key:

curl "https://api.ipapi.is/?q=218.45.64.1"

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