indexo.dev

gukee.com

.com crawl

First seen 2026-04-14 · Last seen 2026-05-05 · ok HTTP/1.1 200 1393 ms crawled 2026-05-07

CN · 43.254.106.48 · AS138421 China Unicom

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
GuKee.com - 谷课

Technology

Server
nginx

Registration

Registrar
Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)
Created
2020-05-28
Expires
2026-05-28 7 days left
Updated
2026-02-04
Name servers
  • ns7.alidns.com
  • ns8.alidns.com

DNS records live

NS
  • dns17.hichina.com
  • dns18.hichina.com
MX
  • 1 mx1.feishu.cn
  • 10 mx3.feishu.cn
  • 5 mx2.feishu.cn
TXT
  • verification-code-site-App_feishu=Ke8Uz2Rk6NMRaWOWekZE

Email authentication weak

SPF
v=spf1 +include:_netblocks.m.feishu.cn -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-03-16 to 2026-06-14
Expires in 24 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://gukee.com/

present
  • strict-transport-security
findings
  • 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

Linked from (1)