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realpython.com No paid content found

Categories: Development Video & Film

Tags: TutorialsOnline Courses

Build real-world Python skills by doing: expert-written tutorials with interactive quizzes and coding exercises, video courses, and an AI mentor that guides you at every level.

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Updated: 2026-09-03 16:41 Language: English (default) Access: Normal

Profile views 11 Outbound visits 10
Real Python Full homepage screenshot

Website Overview

An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.

Domain and Registration

Registered in 2012, this domain has about 14 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain uses the common .com extension, which is not an independent safety signal.

DNS and Email

Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the Google Workspace email service. DNSSEC is enabled, allowing validating resolvers to authenticate signed DNS data. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown.

TLS and Certificates

The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.

HTTP and Browser Security

The response lacks these common security headers: CSP, Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray, via response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers. The Server header identifies cloudflare without an exact version.

Technology Stack Analysis

The public page identifies Bootstrap, Google Analytics, Cloudflare without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

The meta description has 176 characters and may be shortened in search results. Twitter Card metadata is configured. JSON-LD includes Organization data, helping describe the organization as an entity. The title has 43 characters, within a common display range. The observed directives allow indexing and link following.

Hosting and Email

DNSCloudflare
HostingCloudflare
EmailGoogle Workspace
Location Location unknown 104.20.21.64

Pages, Search and Sharing

Meta descriptionBuild real-world Python skills by doing: expert-written tutorials with interactive quizzes and coding exercises, video courses, and an AI mentor that guides you at every level.
Canonical URLhttps://realpython.com/
LanguageEnglish (default)
Twitter Cardsummary

Social Sharing Preview

7 fields

robots.txt (opens in a new tab)

9 rules
All bots 0 allowed · 9 disallowed
  • Disallow/search
  • Disallow*?q=*
  • Disallow*/api/v*
  • Disallow/account/*/login/
  • Disallow/account/*next=
  • Disallow/feedback/*
  • Disallow/practice/*
  • Disallow/preview/*
  • Disallow/quizzes/*/*/

Sitemaps

1

Registration details RDAP / WHOIS

Registrar1API GmbH
Registered2012-08-06
Expires2027-08-06
Domain statusclient transfer prohibited
Nameserverscurt.ns.cloudflare.com、joan.ns.cloudflare.com
DNSSECsigned

DNS records

TypeNameValueTTLPriority
Arealpython.com104.20.21.64300—
Arealpython.com172.66.152.40300—
AAAArealpython.com2606:4700:10::6814:1540300—
AAAArealpython.com2606:4700:10::ac42:9828300—
MXrealpython.comaspmx.l.google.com3001
MXrealpython.comalt1.aspmx.l.google.com3005
MXrealpython.comalt2.aspmx.l.google.com3005
MXrealpython.comalt3.aspmx.l.google.com30010
MXrealpython.comalt4.aspmx.l.google.com30010
NSrealpython.comcurt.ns.cloudflare.com86400—
NSrealpython.comjoan.ns.cloudflare.com86400—
TXTrealpython.comahrefs-site-verification_b23bde4d9aec7044956dcd71cf0d11f916b0e454decab322485d1711448974f4300—
TXTrealpython.comfacebook-domain-verification=mq46mq2is4d14vhplara08baid717h300—
TXTrealpython.comgoogle-site-verification=A7KGy9dXNDDjfcJxzeheQMV3zXmEaGyhfXGD8gVnV0o300—
TXTrealpython.comgoogle-site-verification=Ubborzk4tBqoxnQn8nPqAyMvR6MFiJEJABBL8_y63QQ300—
TXTrealpython.comheroku-domain-verification=4wmxxfa6kei5mnhcv1uv9tupeqkktlelsdph/9h1zyw300—
TXTrealpython.comopenai-domain-verification=dv-fH5y7meWHKLGgcZuenhzq9WI300—
TXTrealpython.comv=spf1 include:sendgrid.net include:_spf.google.com include:spf.mtasv.net -all300—
DSrealpython.com2371 13 2 2d6011398ce9a0aa7aecdd588615f4919b54fdf5056fa1761ea70807a40db4ec86400—
DMARC_dmarc.realpython.comv=DMARC1; p=reject; rua=mailto:[email protected]; aspf=r; pct=100300—

TLS and certificates

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subjectrealpython.com
IssuerLet's Encrypt
Valid until2026-11-04T19:20 · Remaining when checked: 62 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HeaderValue
content-typetext/html; charset=utf-8
servercloudflare
strict-transport-securitymax-age=31536000; includeSubDomains; preload
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
referrer-policystrict-origin-when-cross-origin
set-cookieRedacted

Identified technologies

BootstrapGoogle AnalyticsCloudflare

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