AS7497
Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
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
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About CSTNET
CSTNET or China Science and Technology Network offers Internet services to the Chinese education, research, scientific and technical communities, relevant government departments and hi-tech enterprises, providing services such as network access, host trusteeship, virtual host and domain name registration etc. On April 20, 1994, CSTNET launched the first national formal Internet link and this became the earliest direct global connected Internet in the country.
Network profile
Source: PeeringDB →Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS7497 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 |
|---|---|---|
| 119.78.132.0/22 | 99,467 | 2026-09-11 04:15:00 |
| 210.72.136.0/24 | 98,344 | 2026-09-11 04:15:00 |
| 210.72.142.0/24 | 98,297 | 2026-09-11 04:15:00 |
| 210.72.130.0/24 | 98,229 | 2026-09-11 04:15:00 |
| 210.72.24.0/24 | 33,055 | 2026-09-11 04:56:06 |
| 124.16.249.0/24 | 26,324 | 2026-09-11 04:15:51 |
| 124.16.255.0/24 | 26,304 | 2026-09-11 04:15:51 |
| 210.73.10.0/24 | 26,280 | 2026-09-11 04:15:51 |
| 119.78.168.0/22 | 24,620 | 2026-09-11 04:15:00 |
| 119.78.172.0/23 | 24,603 | 2026-09-11 04:56:05 |
| 210.72.23.0/24 | 20,469 | 2026-09-11 05:05:05 |
| 119.78.160.0/22 | 19,876 | 2026-09-11 04:15:00 |
| 210.73.36.0/24 | 19,807 | 2026-09-11 04:56:04 |
| 210.73.62.0/23 | 18,318 | 2026-09-11 05:05:05 |
| 119.78.216.0/24 | 16,976 | 2026-09-11 04:15:00 |
| 210.73.48.0/24 | 15,905 | 2026-09-11 04:15:00 |
| 210.72.8.0/24 | 15,807 | 2026-09-11 04:15:00 |
| 210.75.238.0/24 | 15,235 | 2026-09-11 04:15:00 |
| 119.78.236.0/22 | 15,075 | 2026-09-11 04:15:00 |
| 210.72.70.0/23 | 14,937 | 2026-09-11 04:15:00 |
| 210.72.9.0/24 | 14,900 | 2026-09-11 04:15:00 |
| 159.226.130.0/24 | 14,875 | 2026-09-11 04:15:00 |
| 210.72.128.0/24 | 14,246 | 2026-09-11 04:15:00 |
| 159.226.140.0/23 | 14,135 | 2026-09-11 04:56:09 |
| 159.226.142.0/24 | 14,036 | 2026-09-11 04:15:00 |
| 210.75.234.0/24 | 14,026 | 2026-09-11 04:15:00 |
| 202.127.155.0/24 | 12,374 | 2026-09-11 04:15:00 |
| 210.77.91.0/24 | 12,372 | 2026-09-11 04:15:00 |
| 202.127.156.0/24 | 12,336 | 2026-09-11 04:15:00 |
| 159.226.236.0/23 | 11,884 | 2026-09-11 04:15:00 |
| 159.226.235.0/24 | 11,804 | 2026-09-11 04:15:00 |
| 202.127.4.0/24 | 11,684 | 2026-09-11 04:56:07 |
| 159.226.52.0/22 | 11,662 | 2026-09-11 04:15:00 |
| 119.78.241.0/24 | 11,510 | 2026-09-11 04:15:00 |
| 159.226.90.0/23 | 11,438 | 2026-09-11 04:15:00 |
| 202.127.30.0/23 | 11,421 | 2026-09-11 04:15:00 |
| 202.127.19.0/24 | 11,409 | 2026-09-11 04:15:00 |
| 159.226.131.0/24 | 11,386 | 2026-09-11 04:15:00 |
| 119.78.242.0/24 | 11,381 | 2026-09-11 04:15:00 |
| 202.127.27.0/24 | 11,366 | 2026-09-11 04:15:00 |
| 159.226.129.0/24 | 11,303 | 2026-09-11 04:15:00 |
| 124.16.130.0/23 | 11,227 | 2026-09-11 04:15:00 |
| 210.75.225.0/24 | 11,100 | 2026-09-11 04:15:00 |
| 119.78.78.0/23 | 11,055 | 2026-09-11 04:56:15 |
| 159.226.219.0/24 | 11,000 | 2026-09-11 04:15:00 |
| 159.226.59.0/24 | 10,975 | 2026-09-11 04:15:00 |
| 159.226.60.0/24 | 10,955 | 2026-09-11 04:15:00 |
| 159.226.143.0/24 | 10,739 | 2026-09-11 04:15:00 |
| 210.73.50.0/24 | 10,529 | 2026-09-11 04:15:00 |
| 210.75.239.0/24 | 10,339 | 2026-09-11 04:15:00 |
Showing top 50 of 471 announced prefixes by sample volume.
Frequently Asked Questions
What is AS7497?
AS7497 is an Autonomous System Number assigned to Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS). 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 AS7497 announce?
AS7497 announces 867.8K IPv4 addresses distributed across 26 routed CIDR prefixes. The network is registered in China.
Who operates AS7497?
AS7497 is operated by Computer Network Information Center of Chinese Academy of Sciences CNIC-CAS. The organization is based in China. You can view all IP ranges and related ASNs on the organization page.
What country is AS7497 registered in?
AS7497 is registered in China. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
