indexo.dev

playgoodsudoku.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 764 ms crawled 2026-05-18

US · 104.21.67.175 · AS13335 Cloudflare, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Good Sudoku

Technology

CDN
Cloudflare

Third-party hosts loaded (1)

  • ajax.googleapis.com×1

Social

Registration

Registrar
GoDaddy.com, LLC
Created
2020-07-07
Expires
2026-07-07 48 days left
Updated
2025-07-08
Name servers
  • kristin.ns.cloudflare.com
  • theo.ns.cloudflare.com

DNS records live

NS
  • kristin.ns.cloudflare.com
  • theo.ns.cloudflare.com
MX
  • 0 _dc-mx.d7f58f169770.playgoodsudoku.com

Email authentication weak

SPF
v=spf1 a mx include:websitewelcome.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-05-15 to 2026-08-13
Expires in 85 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (2)

Linked from (1)