Autonomous System
AS17944 Japan Weather Association
BusinessActiveJapanJPNIC
AS17944 (JWA) is a business network operated by Japan Weather Association in Japan, registered with JPNIC. It has 5 IPv4 prefixes with 131,840 addresses and 1 IPv6 prefix, which makes it the 1,861st largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses131,840in 5 prefixes
IPv6 prefixes1≈ 1.2 × 10²⁴ addresses
Size rank#1,861of 82,200 active ASNs
Details
OrganizationJapan Weather Association
AS nameJWA
Websitejwa.or.jp
Country Japan (JP)
Network typeBusiness
RegistryJPNIC
Abuse contact—
Registered—
Last updated2019-02-14
IPv4 prefixes
5 prefixes · 131,840 addresses| Network | Addresses | First – last address |
|---|---|---|
| 133.105.0.0/16 | 65,536 | 133.105.0.0 – 133.105.255.255 |
| 133.105.0.0/17 | 32,768 | 133.105.0.0 – 133.105.127.255 |
| 133.105.128.0/17 | 32,768 | 133.105.128.0 – 133.105.255.255 |
| 133.105.160.0/23 | 512 | 133.105.160.0 – 133.105.161.255 |
| 192.51.39.0/24 | 256 | 192.51.39.0 – 192.51.39.255 |
133.105.0.0/16 133.105.0.0/17 133.105.128.0/17 133.105.160.0/23 192.51.39.0/24
IPv6 prefixes
1 prefix- 2001:df0:2ca::/48
2001:df0:2ca::/48
Query AS17944 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=AS17944&key=YOUR_API_KEY"Any address in its prefixes resolves to AS17944, with or without a key:
curl "https://api.ipapi.is/?q=133.105.0.1"Largest networks in Japan
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