Domain Blocked Check
Compare DNS resolution between mainland China and overseas resolvers plus an access test to judge whether a domain may be blocked.
sercotec.com
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。
3.33.165.172, 15.197.228.149
Mainland IPs
15.197.228.149, 3.33.165.172
Overseas IPs
Resolver results
| DNS | Region | Status | IP | Time (ms) |
|---|---|---|---|---|
| 阿里DNS 223.5.5.5 | Mainland China | OK | 3.33.165.172, 15.197.228.149 | 501 |
| 腾讯DNS 119.29.29.29 | Mainland China | OK | 3.33.165.172, 15.197.228.149 | 350 |
| 114DNS 114.114.114.114 | Mainland China | OK | 3.33.165.172, 15.197.228.149 | 570 |
| 百度DNS 180.76.76.76 | Mainland China | OK | 3.33.165.172, 15.197.228.149 | 651 |
| Google DNS 8.8.8.8 | Overseas | OK | 15.197.228.149, 3.33.165.172 | 189 |
| Cloudflare 1.1.1.1 | Overseas | OK | 15.197.228.149, 3.33.165.172 | 378 |
| Quad9 9.9.9.9 | Overseas | OK | 3.33.165.172, 15.197.228.149 | 274 |
| OpenDNS 208.67.222.222 | Overseas | OK | 15.197.228.149, 3.33.165.172 | 387 |
Access test
| URL | Status | Time (ms) |
|---|---|---|
| https://sercotec.com | HTTP 403 | 6418 |
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。