Domain Blocked Check
Compare DNS resolution between mainland China and overseas resolvers plus an access test to judge whether a domain may be blocked.
a.cm
Confidence: 高
Not blocked
各节点 DNS 解析一致且可正常解析，未发现被墙特征。 但本站出口无法访问该站点，可能存在服务器访问限制或地域策略。
3.126.5.188, 18.185.24.46, 3.71.139.153, 100.28.104.175, 54.157.108.158, 98.83.184.133
Mainland IPs
3.126.5.188, 3.71.139.153, 18.185.24.46
Overseas IPs
Resolver results
| DNS | Region | Status | IP | Time (ms) |
|---|---|---|---|---|
| 阿里DNS 223.5.5.5 | Mainland China | OK | 3.126.5.188, 18.185.24.46, 3.71.139.153 | 65 |
| 腾讯DNS 119.29.29.29 | Mainland China | OK | 3.126.5.188, 18.185.24.46, 3.71.139.153 | 358 |
| 114DNS 114.114.114.114 | Mainland China | OK | 100.28.104.175, 54.157.108.158, 98.83.184.133 | 384 |
| 百度DNS 180.76.76.76 | Mainland China | OK | 18.185.24.46, 3.71.139.153, 3.126.5.188 | 857 |
| Google DNS 8.8.8.8 | Overseas | OK | 3.126.5.188, 3.71.139.153, 18.185.24.46 | 184 |
| Cloudflare 1.1.1.1 | Overseas | OK | 3.71.139.153, 3.126.5.188, 18.185.24.46 | 481 |
| Quad9 9.9.9.9 | Overseas | OK | 18.185.24.46, 3.71.139.153, 3.126.5.188 | 488 |
| OpenDNS 208.67.222.222 | Overseas | OK | 3.126.5.188, 18.185.24.46, 3.71.139.153 | 1107 |
Access test
| URL | Status | Time (ms) |
|---|---|---|
| https://a.cm | ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR | 717 |
| http://a.cm | HTTP 202 | 1669 |
说明：通过对比中国内地与海外多节点 DNS 解析结果并结合访问测试判断，结果为参考性结论，不能替代专业网络诊断。