Data as of Nov 7, 2026
210.172.248.0/21
No anonymizer space · no proxy exits in 30 daysJCOM Co., Ltd. · space held by Japan Network Information Center
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 210.172.240.0/20 since Aug 2016 | AS4721 | Residential | 19 1 always on | Japan Network Information Center |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 210.160.0.0/12 | 1,048,576 | JPNIC-NET-JP | Japan Network Information Center | ALLOCATED PORTABLE | — | hostmaster@ |
Network & registry
IPv4 market
Holder
- Organization
- Japan Network Information Center
- Range
- 210.
160. 0. 0/ 12 - Registration type
- ALLOCATED PORTABLE
Origin network
AS4721
JP
- Name
- JCOM Co., Ltd.
- Type
- Internet provider
- Registered
- Aug 30, 1995
- Domain
- jcom.co.jp
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2015
- Current origin since
- Sep 2015 · 11 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 210.172.240.0/20 | AS4721 | /24 | APNIC | RPKI valid |
| 210.172.240.0/20 | AS9824 | /24 | APNIC | Another network |
Whois
Registration for this announcement
- Range
- 210.
172. 240. 0/ 20 - Netname
- JCN-CIDR-BLK-JP
- Registrant
- JCOM Co., Ltd.
- Registrant country
- JP
- Organization
- JCOM Co., Ltd.
- Org country
- JP
- Created
- Not stated by the registry
- Updated
- Sep 27, 2021
- RIR
- APNIC
- Country
- JP
- Delegated
- Aug 4, 1997
- Status
- assigned
Report abuse
Abuse contact
- abuse@
home. ne. jp