AS18121
Ishikawa Computer Center Co.,LTD.
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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 5 internet exchanges: JPIX OSAKA, BBIX Tokyo, JPIX TOKYO, BBIX Osaka, JPNAP Tokyo: Peering
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 202.222.32.0/19 | 8.2K |
68.2%
|
Ishikawa Computer Center Co.,LTD. | JP | Ishikawa | Hakusan Shi |
| 180.94.192.0/20 | 4.1K |
31.2%
|
Ishikawa Computer Center Co.,LTD. | JP | Ishikawa | Komatsu |
| 219.121.224.0/20 | 4.1K |
35.4%
|
Ishikawa Computer Center Co.,LTD. | JP | — | — |
| 180.94.208.0/21 | 2.0K |
98.4%
|
Ishikawa Computer Center Co.,LTD. | JP | Ishikawa | Komatsu |
| 219.121.240.0/21 | 2.0K |
0.0%
|
Ishikawa Computer Center Co.,LTD. | JP | — | — |
| 103.241.208.0/23 | 512 |
0.0%
|
Ishikawa Computer Center Co.,LTD. | JP | — | — |
| 219.121.250.0/23 | 512 |
49.2%
|
Ishikawa Computer Center Co.,LTD. | JP | — | — |
| 219.121.252.0/23 | 512 |
48.8%
|
Ishikawa Computer Center Co.,LTD. | JP | — | — |
| 219.121.248.0/24 | 256 |
2.3%
|
Ishikawa Computer Center Co.,LTD. | JP | — | — |
| 219.121.254.0/24 | 256 |
0.4%
|
Ishikawa Computer Center Co.,LTD. | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18121 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 |
|---|---|---|
| 219.121.224.0/19 | 8,476 | 2026-07-26 20:19:19 |
| 180.94.208.0/21 | 8,426 | 2026-07-26 20:19:19 |
| 202.222.32.0/19 | 8,425 | 2026-07-26 20:19:19 |
| 180.94.192.0/20 | 8,394 | 2026-07-26 20:19:19 |
| 103.241.208.0/23 | 8,129 | 2026-07-26 20:19:19 |
| 103.241.208.0/24 | 7,825 | 2026-07-26 20:19:19 |
Frequently Asked Questions
What is AS18121?
AS18121 is an Autonomous System Number assigned to Ishikawa Computer Center Co.,LTD.. 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 AS18121 announce?
AS18121 announces 22.5K IPv4 addresses distributed across 10 routed CIDR prefixes. The network is registered in Japan.
Who operates AS18121?
AS18121 is operated by Ishikawa Computer Center Co.,LTD.. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS18121 registered in?
AS18121 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
