Data as of Nov 9, 2026
210.143.123.0/24
No anonymizer space · no proxy exits in 30 daysCable Networks Akita Co.,ltd. · space held by Japan Network Information Center
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 210.143.112.0/20 since May 2005 | AS18266 | Residential | 33 6 always on | 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 |
|---|---|---|---|---|---|---|
| 210.136.0.0/13 | 524,288 | JPNIC-NET-JP | Japan Network Information Center | ALLOCATED PORTABLE | — | hostmaster@ |
Network & registry
Announced by
Covering announcement 210.143.122.0/23
- Prefix
- 210.143.122.0/23
- Announced by
- AS23783 Cable Networks Akita Co.,ltd.
- Type
- Residential
- RPKI
- RPKI valid
- Netname
- CNA-CIDR-BLK-JP
- Registrant
- Cable Networks Akita Co.,Ltd.
- RIR
- APNIC
IPv4 market
Holder
- Organization
- Japan Network Information Center
- Range
- 210.
136. 0. 0/ 13 - Registration type
- ALLOCATED PORTABLE
Origin network
AS23783
JP
- Name
- Cable Networks Akita Co.,ltd.
- Type
- Internet provider
- Registered
- Jun 16, 2003
- Domain
- cna.ne.jp
- Website
- www.cna.ne.jp/
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
210.143.122.0/23
Routing history
- Pattern
- Stable
- First seen
- Feb 2010
- Current origin since
- Jun 2020 · 6.4 yr
- Origin networks
- 2
- Last change of origin
- Jun 2020
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 210.143.122.0/23 | AS23783 | /23 | APNIC | RPKI valid |
| 210.143.112.0/20 | AS18266 | /24 | APNIC | Another network |
IRR
Route objects on 210.143.122.0/23
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS18266 not the origin | JPIRR | ATNAP-CIDR-BLOCK-3-12 | MAINT-AS18266 | Jun 22, 2026 |
| AS23783 | RADB | Cable Networks Akita Co.,ltd. | MAINT-AS2516 | Nov 13, 2023 |
| AS23783 | NTTCOM | Cable Networks Akita Co.,ltd. | MAINT-AS23783 | Apr 2, 2025 |
| AS23783 | JPIRR | Cable Networks Akita Co.,ltd. | MAINT-AS23783 | Jun 22, 2026 |
Whois
Registration for this announcement
- Range
- 210.
143. 112. 0/ 20 - Netname
- CNA-CIDR-BLK-JP
- Registrant
- Cable Networks Akita Co.,Ltd.
- Registrant country
- JP
- Organization
- Cable Networks Akita Co.,Ltd.
- Org country
- JP
- Created
- Not stated by the registry
- Updated
- Jul 30, 2021
- RIR
- APNIC
- Country
- JP
- Delegated
- Oct 14, 1996
- Status
- assigned
Report abuse
Abuse contact
- abuse@
cna. ne. jp