indexo.dev

sudoku-tools.com

.com crawl

First seen 2026-04-12 · Last seen 2026-04-30 · ok HTTP/1.1 200 401 ms crawled 2026-05-04

DE · 188.40.30.107 · AS24940 Hetzner Online GmbH

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Sudoku Tools - Killer Cage / Region Sums Calculator
Description
Calculator and reference for Sudoku Killer Cages and Region Sums - exclude digits if needed! 9x9 and 6x6 Sudoku
Language
en
Canonical
https://sudoku-tools.com

Open Graph

url
https://sudoku-tools.com
title
Sudoku Tools - Killer Cage and Region Sums Calculator
image:url
https://sudoku-tools.com/screenshot.jpg
description
Calculate all possible combinations for Killer Cages and Region Sums - exclude digits if needed! Supports 9x9 and 6x6 Sudoku.

Technology

Server
Apache

Third-party hosts loaded (1)

  • stats.m11n.de×1

Registration

Registrar
Hetzner Online GmbH
Created
2023-04-16
Expires
2027-04-16 331 days left
Updated
2026-04-17
Name servers
  • ns.second-ns.com
  • ns1.your-server.de
  • ns3.second-ns.de

DNS records live

NS
  • ns.second-ns.com
  • ns1.your-server.de
  • ns3.second-ns.de
MX
  • 10 www277.your-server.de
TXT
  • v=spf1 +a +mx ?all
  • google-site-verification=lyRoAZ2eNSfgU9GK4krJsBP5j1azaozauUW9Zlt8Als

Certificate (current)

R12
from 2026-03-13 to 2026-06-11
Expires in 22 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://sudoku-tools.com/

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

Linked from (1)