indexo.dev

51offer.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 3138 ms crawled 2026-05-18

CN · 47.102.135.30 · AS37963 Hangzhou Alibaba Advertising Co.,Ltd.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
英国|澳洲|美国留学,出国留学 - 51offer让留学更简单
Description
51offer为一站式留学服务智能平台,拥有十年出国留学操作经验.51offer让留学更简单提供英国、美国以及澳洲等众多国家大学的免费留学申请,出国留学指南,DIY留学全攻略等.
Language
zh-CN

Technology

Server
nginx

Third-party hosts loaded (1)

  • dn-static-51offer-img.qbox.me×1

Contact

Phone

Registration

Registrar
Network Solutions, LLC
Created
2004-02-24
Expires
2032-02-24 2106 days left
Updated
2022-07-14
Name servers
  • f1g1ns1.dnspod.net
  • f1g1ns2.dnspod.net

DNS records live

NS
  • f1g1ns1.dnspod.net
  • f1g1ns2.dnspod.net
MX
  • 10 51offer-com.corpsmtp.cn
  • 15 cnc.biz-email.net
  • 20 mail.biz-email.net
  • 5 51offer-com.corpsmtp.net
TXT
  • 916631224-16903753

Email authentication weak

SPF
v=spf1 ip4:47.100.215.175 include:_s.corp-email.com -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

Xcc Trust DV SSL CA
from 2025-10-21 to 2026-10-21
Expires in 155 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (9)

Linked from (1)