indexo.dev

thefouriertransform.com

.com crawl

First seen 2026-04-20 · Last seen 2026-05-13 · ok HTTP/1.1 200 891 ms crawled 2026-05-13

US · 192.185.32.66 · AS19871 Network Solutions, LLC

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Fourier Transform
Description
A thorough tutorial of the Fourier Transform, for both the laymen and the practicing scientist. This site is designed to present a comprehensive overview of the Fourier transform, from the theory to specific applications. A table of Fourier Transform pairs with proofs is here.

Technology

Server
Apache
Analytics
  • Google Tag Manager
Ads
  • Google AdSense
Social widgets
  • YouTube Embed

Third-party hosts loaded (3)

  • pagead2.googlesyndication.com×3
  • www.googletagmanager.com×1
  • www.youtube.com×1

Registration

Registrar
Launchpad.com Inc.
Created
2010-05-15
Expires
2027-05-15 359 days left
Updated
2026-04-30
Name servers
  • ns8065.hostgator.com
  • ns8066.hostgator.com

DNS records live

NS
  • ns8065.hostgator.com
  • ns8066.hostgator.com
MX
  • 0 mail.thefouriertransform.com

Email authentication weak

SPF
v=spf1 a mx include:websitewelcome.com ~all
softfail (~all)
DMARC
not published
DKIM
  • default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuQZ2dzl6vesZeEXbYJsTc7T8oT8O2sxcOglo92EEjsnqy3UtsO+dHr63G+Aivy4mmadKmm1KjuUPvu…
selectors probed

Certificate (current)

R12
from 2026-05-06 to 2026-08-04
Expires in 76 days

Full certificate history on crt.sh ↗

HTTP security headers

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

present
  • content-security-policy
findings
  • missing HSTS
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
content-security-policy
upgrade-insecure-requests

Links to (1)

Linked from (1)