Autonomous System
AS18124 Okayama University of Science
EducationActiveJapanJPNIC
AS18124 (OUS-NET) is an education network operated by Okayama University of Science in Japan, registered with JPNIC. It has 10 IPv4 prefixes with 200,704 addresses and 1 IPv6 prefix, which makes it the 1,293rd largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses200,704in 10 prefixes
IPv6 prefixes1≈ 1.2 × 10²⁴ addresses
Size rank#1,293of 82,200 active ASNs
Details
OrganizationOkayama University of Science
AS nameOUS-NET
Websiteous.ac.jp
Country Japan (JP)
Network typeEducation
RegistryJPNIC
Abuse contact—
Registered—
Last updated2022-10-13
IPv4 prefixes
10 prefixes · 200,704 addresses| Network | Addresses | First – last address |
|---|---|---|
| 150.55.0.0/16 | 65,536 | 150.55.0.0 – 150.55.255.255 |
| 150.55.0.0/17 | 32,768 | 150.55.0.0 – 150.55.127.255 |
| 150.55.128.0/17 | 32,768 | 150.55.128.0 – 150.55.255.255 |
| 150.55.0.0/18 | 16,384 | 150.55.0.0 – 150.55.63.255 |
| 150.55.64.0/18 | 16,384 | 150.55.64.0 – 150.55.127.255 |
| 150.55.128.0/18 | 16,384 | 150.55.128.0 – 150.55.191.255 |
| 150.55.192.0/18 | 16,384 | 150.55.192.0 – 150.55.255.255 |
| 150.55.128.0/21 | 2,048 | 150.55.128.0 – 150.55.135.255 |
| 150.55.128.0/22 | 1,024 | 150.55.128.0 – 150.55.131.255 |
| 150.55.132.0/22 | 1,024 | 150.55.132.0 – 150.55.135.255 |
150.55.0.0/16 150.55.0.0/17 150.55.128.0/17 150.55.0.0/18 150.55.64.0/18 150.55.128.0/18 150.55.192.0/18 150.55.128.0/21 150.55.128.0/22 150.55.132.0/22
IPv6 prefixes
1 prefix- 2001:df0:3d80::/48
2001:df0:3d80::/48
Query AS18124 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=AS18124&key=YOUR_API_KEY"Any address in its prefixes resolves to AS18124, with or without a key:
curl "https://api.ipapi.is/?q=150.55.0.1"Largest networks in Japan
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