51site.net

.net crawl

First seen 2026-04-21 · Last seen 2026-05-18 · ok HTTP/1.1 200 717 ms crawled 2026-05-18

ZA · 168.76.252.74 · AS137951 ASLINE LIMITED

Reputation 70/100 wrong cert weak security headers

Classifying

HTML metadata

Title: 双优建站:域名注册,智能网站建设,网站制作,微信营销,云主机
Description: 双优建站专注于域名注册,云主机,企业网站建设,网站制作,SEO优化,微信营销,微信小程序开发,开发语言ASP.NET/JAVA/PHP/HTML5任*选,15年大型门户网站建设与优化经验
Language: zh-CN

Open Graph

url: http://51site.net/
title: 双优建站:域名注册,智能网站建设,网站制作,微信营销,云主机
keywords: 双优建站:域名注册,智能网站建设,网站制作,微信营销,云主机
site name: 双优建站:域名注册,智能网站建设,网站制作,微信营销,云主机
description: 双优建站专注于域名注册,云主机,企业网站建设,网站制作,SEO优化,微信营销,微信小程序开发,开发语言ASP.NET/JAVA/PHP/HTML5任*选,15年大型门户网站建设与优化经验

Technology

Server: nginx

Third-party hosts loaded (1)

222.73.219.23×4

Contact

Phone

Registration

Registrar

Hefei Juming Network Technology Co., Ltd

Created

2009-01-09

Expires

2027-01-09 234 days left

Updated

2026-04-16

Name servers

ns3.a1-w.com
ns4.a1-w.com

DNS records live

NS

ns1.a1-w.com
ns2.a1-w.com
ns3.a1-w.com
ns4.a1-w.com

Email authentication no MX

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

Certificate (current) wrong cert

R13

from 2026-05-04 to 2026-08-02

Expires in 75 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 35/100 Checked over plain HTTP: http://51site.net/

findings

checked over plain HTTP
missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy