Autonomous system
AS59126 NCT NCT CO.,LTD.
Residential APNIC Cable/DSL/ISP
Summary
NCT
isp residential cable japan
NCT is operated by NCT CO.,LTD.
What it's used for
- The address space carries residential and business internet access, evidenced by reverse DNS entries such as
n103081146254.nct9.ne.jpandn219100086254.nct9.ne.jp, and netnamesNCT-CIDR-BLK-JPandNCT. - The AS announces 10,240 IPv4 addresses across 3 prefixes and 1 IPv6 prefix, with 22 observed neighbours; this ratio indicates an access network providing connectivity to end-users rather than a transit provider.
- Traffic from this AS consists of subscriber eyeballs for cable and DSL internet services in Japan, as NCT CO.,LTD. operates as a regional ISP.
Notable
- Registrants for all announced prefixes are listed as Japan Network Information Center with IRT-JPNIC-JP, consistent with the announcer NCT CO.,LTD.
- The address inventory includes a large /19 block (193.114.0.0/19) alongside smaller /22 blocks, reflecting a mixed allocation of legacy and newer address space.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 6 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.88.181 |
| JPIX Tokyo | Tokyo, Japan | 210.171.225.185 |
| BroadBand Internet eXchange Singapore | Singapore, Singapore | 103.231.152.45 |
| BroadBand Internet eXchange Osaka | Osaka, Japan | 218.100.9.193 |
| JPIX Osaka | Osaka, Japan | 103.246.232.85 |
| BroadBand Internet eXchange Hong Kong | Hong Kong, China | 103.203.158.45 |
Transit providers
9 upstream, 0 downstream and 15 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 10.24K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 4 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS59126- Registry name
- NCT
- Registered
- 2013-09-09
- Last changed
- 2018-04-11
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- NCT CO.,LTD.
- Also known as
- NCT
- Network type
- Cable/DSL/ISP
- Scope
- Asia Pacific
- Traffic ratio
- Heavy Inbound
- Peering policy
- Selective
- IRR as-set
JPIRR::AS-NCT- Present at
- 9 exchanges
- Website
- https://www.nct9.co.jp/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 6 with no ROA
- ROAs
- 0 authorising AS59126
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 6 announcements
- Route objects
- 0 naming AS59126
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 446 networks and 1,852 prefixes, as published 2026-10-27. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere