Data as of Nov 4, 2026
202.231.40.0/22
No anonymizer space · no proxy exits in 30 daysResearch Organization of Information and Systems, National Institute of Informatics · space held by Japan Network Information Center
Registrations in this block
The registry's network records over this block, widest first, each under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 202.230.0.0/15 | 131,072 | JPNIC-NET-JP | Japan Network Information Center | ALLOCATED PORTABLE | — | hostmaster@ |
Network & registry
Announced by
Covering announcement 202.231.0.0/18
- Prefix
- 202.231.0.0/18
- Announced by
- AS2907 Research Organization of Information and Systems, National Institute of Informatics
- Type
- Business
- Proxy exits
- 9
- RPKI
- RPKI valid
- Netname
- SINET-CIDR-BLK-JP
- Registrant
- Research Organization of Information and Systems, National Institute of Informatics
- RIR
- APNIC
IPv4 market
Holder
- Organization
- Japan Network Information Center
- Range
- 202.
230. 0. 0/ 15 - Registration type
- ALLOCATED PORTABLE
Origin network
AS2907
JP
- Name
- Research Organization of Information and Systems, National Institute of Informatics
- Type
- Education
- Registered
- Aug 1, 2002
- Domain
- sinet.ad.jp
- Website
- www.sinet.ad.jp/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced 202.231.0.0/18
202.231.0.0/18
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- May 2005 · 21 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 202.231.0.0/18 | AS2907 | /32 | APNIC | RPKI valid |
IRR
Route objects on 202.231.0.0/18
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS2907 | JPIRR | SINET CIDR Block | MAINT-AS2907 | Mar 2, 2026 |
Whois
Registration for this announcement
- Range
- 202.
231. 0. 0/ 18 - Netname
- SINET-CIDR-BLK-JP
- Registrant
- Research Organization of Information and Systems, National Institute of Informatics
- Registrant country
- JP
- Organization
- Research Organization of Information and Systems, National Institute of Informatics
- Org country
- JP
- Created
- Not stated by the registry
- Updated
- Jun 13, 2024
- RIR
- APNIC
- Country
- JP
- Delegated
- Aug 14, 1995
- Status
- assigned
Report abuse
Abuse contact
- abuse@
sinet. ad. jp