indexo.dev

math-for-life.com

.com crawl

First seen 2026-04-20 · Last seen 2026-05-11 · ok HTTP/1.1 200 1774 ms crawled 2026-05-14

US · 50.87.171.166 · AS46606 Unified Layer

Reputation 87/100 weak security headers no dmarc policy

sector education type homepage

HTML metadata

Title
Math for Life by Jeffrey Bennett – Crucial Ideas You Didn't Learn in School
Language
en-US
Canonical
https://math-for-life.com/
Feeds

Technology

Server
nginx
CMS
WordPress
Fonts
  • Google Fonts

Third-party hosts loaded (2)

  • fonts.googleapis.com×1
  • gmpg.org×1

Social

Registration

Registrar
Bluehost Inc.
Created
2011-05-20
Expires
2027-05-20 366 days left
Updated
2026-05-05
Name servers
  • ns1.bluehost.com
  • ns2.bluehost.com

DNS records live

NS
  • ns1.bluehost.com
  • ns2.bluehost.com
MX
  • 0 math-for-life.com

Email authentication weak

SPF
v=spf1 a mx ptr include:websitewelcome.com ?all
neutral (?all)
DMARC
not published
DKIM
  • default: k=rsa; p=MHwwDQYJKoZIhvcNAQEBBQADawAwaAJhAMNVsSTre7BoHe5sr5KUk9snomI3nM509cRjGKigI1kyvozf7t2a5O9hAfrzdtp/hNnoQBneSfSY1FKBwYnu77lJCobGruCaFbu…
selectors probed

Certificate (current)

R12
from 2026-03-28 to 2026-06-26
Expires in 38 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://math-for-life.com/

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

Links to (7)

Linked from (1)