51door.com

.com crawl

First seen 2026-04-20 · Last seen 2026-05-19 · ok HTTP/1.1 200 1056 ms crawled 2026-05-14

US · 104.21.83.254 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: 防盗门,安全门,非标门,钢木门,木门,中国门都,门业商情网,门行业互动交流平台！
Language: en

Technology

CDN: Cloudflare
CMS: Gatsby

Registration

Registrar

Gname.com Pte. Ltd.

Created

2004-10-30

Expires

2026-10-30 163 days left

Updated

2025-11-25

Name servers

celine.ns.cloudflare.com
peter.ns.cloudflare.com

DNS records live

NS

celine.ns.cloudflare.com
peter.ns.cloudflare.com

Email authentication no MX

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

Certificate (current)

WE1

from 2026-03-23 to 2026-06-21

Expires in 33 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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

Links to (50)

Linked from (50)