51dcw.com

.com crawl

First seen 2026-04-17 · Last seen 2026-05-18 · ok HTTP/1.1 200 5502 ms crawled 2026-05-12

CN · 120.226.35.82 · AS56047 China Mobile communications corporation

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: 51地产网
Description: 51地产网提供海量优质的范文、经验、百科、常识、知识、问答供大家学习和了解。

Technology

Server: Byte-nginx

Contact

Phone

Registration

Registrar

Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)

Created

2016-09-07

Expires

2026-09-07 110 days left

Updated

2025-08-22

Name servers

dns23.hichina.com
dns24.hichina.com

DNS records live

NS

dns23.hichina.com
dns24.hichina.com

CNAME

51dcw.com.volcgslb-mlt.com

Email authentication no MX

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

Certificate (current)

R13

from 2026-04-02 to 2026-07-01

Expires in 43 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 35/100 Checked over plain HTTP: http://www.51dcw.com/

present

strict-transport-security

findings

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

Header values

strict-transport-security: max-age=31536000