indexo.dev

rjbdzkb.com

.com crawl

First seen 2026-04-23 · Last seen 2026-05-14 · ok HTTP/1.1 200 9633 ms crawled 2026-05-17

HK · 47.238.77.47 · AS45102 Alibaba US Technology Co., Ltd.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
人教版电子课本 | 小学初中高中教材免费下载
Description
人教版电子课本免费下载，涵盖小学、初中、高中全学段全科目人教版电子课本PDF，支持按年级、科目精准检索，即搜即得，无需注册。
Language
zh-CN
Canonical
https://www.dzkbxz.com/

Open Graph

url
https://www.dzkbxz.com/
title
人教版电子课本 | 小学初中高中教材免费下载
description
人教版电子课本免费下载，全学段全科目 PDF 高清完整版，无需注册即可使用。

Technology

Server
nginx
CMS
Next.js
Ads
  • Google AdSense

Third-party hosts loaded (3)

  • pagead2.googlesyndication.com×1
  • sdk.51.la×1
  • www.dzkbxz.com×1

Registration

Registrar
Dynadot Inc
Created
2026-02-13
Expires
2027-02-13 269 days left
Updated
2026-02-13
Name servers
  • ns1.dyna-ns.net
  • ns2.dyna-ns.net

DNS records live

NS
  • ns1.dyna-ns.net
  • ns2.dyna-ns.net
MX
  • 0 parkmail.dynadot.com
Verified for
  • Google

Email authentication weak

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

Certificate (current)

R12
from 2026-02-27 to 2026-05-28
Expires in 8 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Linked from (1)