Autonomous System
AS55899 irob Ltd.
BusinessActiveJapanJPNIC
AS55899 (IROB) is a business network operated by irob Ltd. in Japan, registered with JPNIC. It has 6 IPv4 prefixes with 14,848 addresses and 2 IPv6 prefixes, which makes it the 8,277th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses14,848in 6 prefixes
IPv6 prefixes2≈ 1.6 × 10²⁹ addresses
Size rank#8,277of 82,200 active ASNs
Details
Organizationirob Ltd.
AS nameIROB
Websiteirob.co.jp
Country Japan (JP)
Network typeBusiness
RegistryJPNIC
Abuse contact—
Registered—
Last updated2025-03-28
IPv4 prefixes
6 prefixes · 14,848 addresses| Network | Addresses | First – last address |
|---|---|---|
| 183.182.32.0/19 | 8,192 | 183.182.32.0 – 183.182.63.255 |
| 183.182.32.0/21 | 2,048 | 183.182.32.0 – 183.182.39.255 |
| 183.182.48.0/21 | 2,048 | 183.182.48.0 – 183.182.55.255 |
| 183.182.40.0/22 | 1,024 | 183.182.40.0 – 183.182.43.255 |
| 183.182.44.0/22 | 1,024 | 183.182.44.0 – 183.182.47.255 |
| 103.171.16.0/23 | 512 | 103.171.16.0 – 103.171.17.255 |
183.182.32.0/19 183.182.32.0/21 183.182.48.0/21 183.182.40.0/22 183.182.44.0/22 103.171.16.0/23
IPv6 prefixes
2 prefixes- 2401:2540::/32
- 2407:bc40::/32
2401:2540::/32 2407:bc40::/32
Query AS55899 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=AS55899&key=YOUR_API_KEY"Any address in its prefixes resolves to AS55899, with or without a key:
curl "https://api.ipapi.is/?q=183.182.32.1"Largest networks in Japan
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