indexo.dev

polarsguide.com

.com crawl

First seen 2026-04-15 · Last seen 2026-05-07 · ok HTTP/1.1 200 863 ms crawled 2026-05-08

US · 188.114.96.3 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Python Polars: The Definitive Guide
Language
en
Generator
quarto-1.8.26

Open Graph

title
Python Polars: The Definitive Guide
site name
Python Polars: The Definitive Guide
description
Welcome to the official website of the book Python Polars: The Definitive Guide by Jeroen Janssens and Thijs Nieuwdorp.

Technology

CDN
Cloudflare
Analytics
  • Cloudflare Insights

Third-party hosts loaded (2)

  • static.cloudflareinsights.com×2
  • f.convertkit.com×1

Social

Registration

Registrar
NameCheap, Inc.
Created
2024-08-16
Expires
2026-08-16 87 days left
Updated
2025-07-17
Name servers
  • roxy.ns.cloudflare.com
  • yahir.ns.cloudflare.com

DNS records live

NS
  • roxy.ns.cloudflare.com
  • yahir.ns.cloudflare.com

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-03-11 to 2026-06-09
Expires in 20 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://polarsguide.com/

present
  • x-content-type-options
  • referrer-policy
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-content-type-options
nosniff

Links to (3)

Linked from (1)