Domain Blocked Check

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

sierra.club

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。

96.45.82.170, 96.45.83.7, 96.45.83.181, 96.45.82.105

Mainland IPs

96.45.83.181, 96.45.82.170, 96.45.83.7, 96.45.82.105

Overseas IPs

DNS	Region	Status	IP	Time (ms)
阿里DNS 223.5.5.5	Mainland China	OK	96.45.82.170, 96.45.83.7, 96.45.83.181, 96.45.82.105	108
腾讯DNS 119.29.29.29	Mainland China	OK	96.45.83.181, 96.45.82.105, 96.45.82.170, 96.45.83.7	135
114DNS 114.114.114.114	Mainland China	OK	96.45.82.105, 96.45.83.181, 96.45.83.7, 96.45.82.170	262
百度DNS 180.76.76.76	Mainland China	OK	96.45.82.105, 96.45.82.170, 96.45.83.7, 96.45.83.181	407
Google DNS 8.8.8.8	Overseas	OK	96.45.83.181, 96.45.82.170, 96.45.83.7, 96.45.82.105	39
Cloudflare 1.1.1.1	Overseas	OK	96.45.83.181, 96.45.83.7, 96.45.82.105, 96.45.82.170	102
Quad9 9.9.9.9	Overseas	OK	96.45.83.181, 96.45.82.170, 96.45.83.7, 96.45.82.105	94
OpenDNS 208.67.222.222	Overseas	OK	96.45.83.7, 96.45.83.181, 96.45.82.105, 96.45.82.170	36

URL	Status	Time (ms)
https://sierra.club	ERR_TLS_CERT_ALTNAME_INVALID	1412
http://sierra.club	HTTP 403	5316

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。