Domain Blocked Check
Compare DNS resolution between mainland China and overseas resolvers plus an access test to judge whether a domain may be blocked.
areacodes.us
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。
23.239.4.93, 74.207.241.245, 192.155.84.236, 172.104.203.186, 172.104.149.86, 139.162.181.76, 172.104.251.198, 139.162.174.209
Mainland IPs
74.207.241.245, 23.239.4.93, 192.155.84.236
Overseas IPs
Resolver results
| DNS | Region | Status | IP | Time (ms) |
|---|---|---|---|---|
| 阿里DNS 223.5.5.5 | Mainland China | OK | 23.239.4.93, 74.207.241.245, 192.155.84.236 | 166 |
| 腾讯DNS 119.29.29.29 | Mainland China | OK | 74.207.241.245, 192.155.84.236, 23.239.4.93 | 240 |
| 114DNS 114.114.114.114 | Mainland China | OK | 172.104.203.186, 172.104.149.86, 139.162.181.76 | 299 |
| 百度DNS 180.76.76.76 | Mainland China | OK | 172.104.251.198, 172.104.149.86, 172.104.203.186, 139.162.174.209, 139.162.181.76 | 627 |
| Google DNS 8.8.8.8 | Overseas | OK | 74.207.241.245, 23.239.4.93, 192.155.84.236 | 153 |
| Cloudflare 1.1.1.1 | Overseas | OK | 74.207.241.245, 192.155.84.236, 23.239.4.93 | 298 |
| Quad9 9.9.9.9 | Overseas | OK | 23.239.4.93, 74.207.241.245, 192.155.84.236 | 182 |
| OpenDNS 208.67.222.222 | Overseas | OK | 192.155.84.236, 23.239.4.93, 74.207.241.245 | 377 |
Access test
| URL | Status | Time (ms) |
|---|---|---|
| https://areacodes.us | UNABLE_TO_GET_ISSUER_CERT_LOCALLY | 480 |
| http://areacodes.us | HTTP 200 | 925 |
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。