AS23641
NS Computer Service Corporation
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 2 internet exchanges: BBIX Tokyo, Echigo-IX
AS23641 — global IP footprint
Cities where AS23641 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 211.19.16.0/20 | 4.1K |
95.8%
|
NS Computer Service Corporation | JP | Niigata | Nagaoka |
| 203.86.224.0/21 | 2.0K |
95.6%
|
NS Computer Service Corporation | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS23641 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 211.19.16.0/20 | 3,522 | 2026-07-18 07:49:06 |
| 203.86.224.0/21 | 3,467 | 2026-07-18 07:49:06 |
Frequently Asked Questions
What is AS23641?
AS23641 is an Autonomous System Number assigned to NS Computer Service Corporation. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS23641 announce?
AS23641 announces 6.1K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Japan.
Who operates AS23641?
AS23641 is operated by NS Computer Service Corporation. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS23641 registered in?
AS23641 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
