realpython.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 588 ms crawled 2026-05-18

US · 104.20.21.64 · AS13335 Cloudflare, Inc.

Reputation 100/100

Classifying

HTML metadata

Title

Python Tutorials – Real Python

Description

Learn Python online: Python tutorials for developers of all skill levels, Python books and courses, Python news, code examples, articles, and more.

Language

Canonical

https://realpython.com/

Feeds

Real Python Atom

Open Graph

url: https://realpython.com/
title: Python Tutorials – Real Python
description: Learn Python online: Python tutorials for developers of all skill levels, Python books and courses, Python news, code examples, articles, and more.

Technology

CDN: Cloudflare
CMS: Gatsby

Analytics

Google Tag Manager

Third-party hosts loaded (3)

accounts.google.com×1
srv.realpython.net×1
www.googletagmanager.com×1

Social

Registration

Registrar

1API GmbH

Created

2012-08-06

Expires

2026-08-06 79 days left

Updated

2025-11-22

Name servers

curt.ns.cloudflare.com
joan.ns.cloudflare.com

DNS records live

NS

curt.ns.cloudflare.com
joan.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 6 TXT records

heroku-domain-verification=4wmxxfa6kei5mnhcv1uv9tupeqkktlelsdph/9h1zyw
openai-domain-verification=dv-fH5y7meWHKLGgcZuenhzq9WI
ahrefs-site-verification_b23bde4d9aec7044956dcd71cf0d11f916b0e454decab322485d1711448974f4
facebook-domain-verification=mq46mq2is4d14vhplara08baid717h
google-site-verification=A7KGy9dXNDDjfcJxzeheQMV3zXmEaGyhfXGD8gVnV0o
google-site-verification=Ubborzk4tBqoxnQn8nPqAyMvR6MFiJEJABBL8_y63QQ

Email authentication strong

SPF

v=spf1 include:sendgrid.net include:_spf.google.com include:spf.mtasv.net -all

strict (-all)

DMARC

v=DMARC1; p=reject; rua=mailto:re+ssz0gp2paja@inbound.dmarcdigests.com; aspf=r; pct=100

policy: reject (enforced)

DKIM

google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAkjF6oAy1YZSOBF5IRzp8RdmiJhmKS5HpUmKRso/6f98yx3fV4GZmAZe46JAEuvGKv/Bni/uHumS0Wz…
s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwT0E44niw0dKPRhxBzMMx4IpFBF0IAJ0Sc3BmQaXnzEsY+Vkacj3Av4iJOX8eQKWkStW2d4+Relcuq03YR…
s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDGtZQtnP1AWIeZgBzHs63iz1u6lrjB1bihnc7LJRrgs/0/jgYYyeABx8ewhSaoUtTOPe8uu71g4j3ryFnQ31r/p0…

selectors probed

Certificate (current)

from 2026-04-10 to 2026-07-09

Expires in 52 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://realpython.com/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy
cross-origin-opener-policy

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: strict-origin-when-cross-origin
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubDomains; preload
cross-origin-opener-policy: same-origin