Domain Blocked Check

Compare DNS resolution between mainland China and overseas resolvers plus an access test to judge whether a domain may be blocked.

guardrail.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。

18.244.60.105, 18.244.60.106, 18.244.60.60, 18.244.60.86, 18.173.205.2, 18.173.205.66, 18.173.205.65, 13.249.228.32, 13.249.228.92, 13.249.228.49, 13.249.228.15

Mainland IPs

18.244.60.86, 18.244.60.106, 18.244.60.60, 18.244.60.105

Overseas IPs

Resolver results

DNS	Region	Status	IP	Time (ms)
阿里DNS 223.5.5.5	Mainland China	OK	18.244.60.105, 18.244.60.106, 18.244.60.60, 18.244.60.86	142
腾讯DNS 119.29.29.29	Mainland China	OK	18.244.60.105, 18.244.60.60, 18.244.60.106, 18.244.60.86	116
114DNS 114.114.114.114	Mainland China	OK	18.173.205.2, 18.173.205.66, 18.173.205.65	284
百度DNS 180.76.76.76	Mainland China	OK	13.249.228.32, 13.249.228.92, 13.249.228.49, 13.249.228.15	470
Google DNS 8.8.8.8	Overseas	OK	18.244.60.86, 18.244.60.106, 18.244.60.60, 18.244.60.105	54
Cloudflare 1.1.1.1	Overseas	OK	18.244.60.60, 18.244.60.105, 18.244.60.86, 18.244.60.106	12
Quad9 9.9.9.9	Overseas	OK	18.244.60.105, 18.244.60.106, 18.244.60.86, 18.244.60.60	81
OpenDNS 208.67.222.222	Overseas	OK	18.244.60.105, 18.244.60.106, 18.244.60.60, 18.244.60.86	206

Access test

URL	Status	Time (ms)
https://guardrail.com	HTTP 200	188

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。