dataquest.io

.io crawl

First seen 2026-04-13 · Last seen 2026-05-06 · ok HTTP/1.1 200 865 ms crawled 2026-05-06

US · 172.66.40.152 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: Learn Data Science, Python, and AI skills – FASTER!
Description: 98% of learners recommend Dataquest for learning Python, R programming, SQL, data engineering, data science, and more.
Language: en-US
Canonical: https://www.dataquest.io/

Open Graph

url: https://www.dataquest.io/
title: Dataquest: Data Science Courses: Learn 10x Faster
locale: en_US
site name: Dataquest
description: 98% of learners recommend Dataquest for learning Python, R programming, SQL, data engineering, data science, and more.

Technology

CDN: Cloudflare
CMS: WordPress

Analytics

Cloudflare Insights
Google Tag Manager

Third-party hosts loaded (4)

cdnjs.cloudflare.com×4
dsserver-prod-resources-1.s3.amazonaws.com×2
static.cloudflareinsights.com×1
www.googletagmanager.com×1

Social

Contact

Address: st Downloadwindow.celebratePopupData = { startDate: "2026

DNS records live

NS

elmo.ns.cloudflare.com
sima.ns.cloudflare.com

MX

1 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

TXT

Show 7 TXT records

ca3-9505e3d23956458592884b5d21ad0a27
ca3-9b0685d5a5614046bee6e7662dccaf17
google-site-verification=H9ftzZ-vNkRP9xyIrRGfGGo2oXzEFtyCmOyUGLkasiw
google-site-verification=KNEs2l4t4KMS9BsmiY0_Na8o4gf_Dj4aPy05bliH6Dg
google-site-verification=L6Pb3XBCCqYkqA-hOIhb0Lowvktf-VMOoFD1e1TUHrI
google-site-verification=NOMagGLfy6Bu_hTYKVPm3igeENCM4Vt_5Z2liHlYugw
google-site-verification=dDAq2EDyqPv399JlskrQbdzlh65adAVB7sobvu1AVSg

Email authentication strong

SPF

v=spf1 include:_spf.google.com include:email.chargebee.com include:sparkpostmail.com include:spf.rev.io include:transmail.net include:spf.mailjet.com include:email.freshdesk.com include:relay.kinstamailservice.com include:servers.mcsv.net ~all

softfail (~all)

DMARC

v=DMARC1; p=reject; rua=mailto:anna+dmarc@dataquest.io; ruf=mailto:anna+dmarc-failed@dataquest.io; fo=1

policy: reject (enforced)

DKIM

google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCPVjtSkKe1FB9rZ7oAHE/PjK+JuTVf+QAkr+QApbL3W2b05qJx9vmPDllVov3zzoCArp3fnCdLIs5F/ohDoo…
k1: k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtn2S+Ow+a76P8zoq23K62ABMr/3LPFTOp24X109lodmLRo797ltEcmj9gU/zdMFfD46sMCJXFYzkDEoe/1lfHmw…
k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2fWuAlBgdAW8G8tEvCo3UzFklXO6SP9qFo3FZc9039/r2D24oLRf6FXhFOqrO2hFypJJqK14RFmfsIxGsd…
s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPynk/J3KAzZ+mQD1TSpq6E/vgC/fjvltNelu+p6uHHT6cEnGVoJ13/1BpY6fs4UYheMlAYJVdqWeOikkS+ywbwn…

selectors probed

Certificate (current)

WE1

from 2026-03-14 to 2026-06-12

Expires in 24 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://www.dataquest.io/

present

x-content-type-options

findings

missing HSTS
missing Content Security Policy
missing frame protection
missing Referrer Policy
missing Permissions Policy

Header values

x-content-type-options: nosniff

Links to (4)

Linked from (2)

fuzzingbook.org×2
debuggingbook.org×2