Domain Blocked Check
Compare DNS resolution between mainland China and overseas resolvers plus an access test to judge whether a domain may be blocked.
ahmad.org
Confidence: 中
Region limited
中国内地 DNS 可解析，海外节点解析异常，可能仅面向国内或存在地域限制。
2.57.91.91
Mainland IPs
-
Overseas IPs
Resolver results
| DNS | Region | Status | IP | Time (ms) |
|---|---|---|---|---|
| 阿里DNS 223.5.5.5 | Mainland China | OK | 2.57.91.91 | 63 |
| 腾讯DNS 119.29.29.29 | Mainland China | OK | 2.57.91.91 | 147 |
| 114DNS 114.114.114.114 | Mainland China | OK | 2.57.91.91 | 470 |
| 百度DNS 180.76.76.76 | Mainland China | OK | 2.57.91.91 | 573 |
| Google DNS 8.8.8.8 | Overseas | ESERVFAIL | - | 43 |
| Cloudflare 1.1.1.1 | Overseas | ESERVFAIL | - | 106 |
| Quad9 9.9.9.9 | Overseas | ESERVFAIL | - | 282 |
| OpenDNS 208.67.222.222 | Overseas | ESERVFAIL | - | 46 |
Access test
| URL | Status | Time (ms) |
|---|---|---|
| https://ahmad.org | ERR_SSL_TLSV1_ALERT_INTERNAL_ERROR | 397 |
| http://ahmad.org | HTTP 200 | 204 |
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。