indexo.dev

51html5.com

.com crawl

First seen 2026-05-07 · Last seen 2026-05-14 · ok HTTP/1.1 200 1136 ms crawled 2026-05-14

CN · 47.92.92.162 · AS37963 Hangzhou Alibaba Advertising Co.,Ltd.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
HTML5技术网
Description
HTML5技术网（www.51html5.com）是HTML5相关的技术分享网站，网站涵盖了HTML5的各种信息，包括HTML5教程、HTML5网站示例、HTML5开发工具以及其它HTML5相关的各种开发技术文章。
Canonical
https://www.51html5.com/

Technology

Server
nginx

Third-party hosts loaded (1)

  • mirrors.sustech.edu.cn×1

Registration

Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Created
2010-05-01
Expires
2027-05-01 347 days left
Updated
2025-08-14
Name servers
  • dns27.hichina.com
  • dns28.hichina.com

DNS records live

NS
  • dns27.hichina.com
  • dns28.hichina.com

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-04-19 to 2026-07-18
Expires in 60 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://51html5.com/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (12)

Linked from (5)