indexo.dev

tessalationbook.com

.com crawl

First seen 2026-04-18 · Last seen 2026-05-09 · ok HTTP/1.1 200 3186 ms crawled 2026-05-12

US · 172.67.207.197 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Home
Language
en
Canonical
https://www.tessalationbook.com

Open Graph

url
https://www.tessalationbook.com/
title
Tessalation!
site name
Tessalation!
description
"I loved this book! An irresistible celebration of mathematics and nature, buoyantly and beautifully executed." -- Dan Finkel, Math for Love "Tessalation! is an invitation to view a beautiful slice...

Technology

CDN
Cloudflare
Social widgets
  • YouTube Embed

Third-party hosts loaded (1)

  • www.youtube.com×1

Registration

Registrar
Gname.com Pte. Ltd.
Created
2025-02-06
Expires
2027-02-06 262 days left
Updated
2026-02-21
Name servers
  • jay.ns.cloudflare.com
  • meilani.ns.cloudflare.com

DNS records live

NS
  • jay.ns.cloudflare.com
  • meilani.ns.cloudflare.com
TXT
  • google-site-verification=P7k_FUUttW26bBduWPv76yvOzspcqhCEIcMR4B85LWQ

Email authentication no MX

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

Certificate (current)

WE1
from 2026-03-31 to 2026-06-29
Expires in 41 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://tessalationbook.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)