3blue1brown.com

.com crawl

First seen 2026-04-12 · Last seen 2026-05-15 · ok HTTP/1.1 200 1470 ms crawled 2026-05-04

US · 75.2.60.5 · AS16509 Amazon.com, Inc.

Reputation 100/100

Classifying

HTML metadata

Title: 3Blue1Brown
Description: Mathematics with a distinct visual perspective. Linear algebra, calculus, neural networks, topology, and more.
Language: en
Canonical: https://www.3blue1brown.com/

Open Graph

url: https://www.3blue1brown.com/
title: 3Blue1Brown
description: Mathematics with a distinct visual perspective. Linear algebra, calculus, neural networks, topology, and more.

Technology

CDN: Netlify

Analytics

Google Tag Manager

Third-party hosts loaded (2)

img.youtube.com×2
www.googletagmanager.com×1

Social

Registration

Registrar

Squarespace Domains II LLC

Created

2015-03-04

Expires

2027-03-04 289 days left

Updated

2026-02-17

Name servers

ns-cloud-a1.googledomains.com
ns-cloud-a2.googledomains.com
ns-cloud-a3.googledomains.com
ns-cloud-a4.googledomains.com

DNS records live

NS

ns-cloud-a1.googledomains.com
ns-cloud-a2.googledomains.com
ns-cloud-a3.googledomains.com
ns-cloud-a4.googledomains.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

v=spf1 include:_spf.google.com ~all
brave-ledger-verification=7382ee9a6fe88378c8ab46de46b3fd66e024c5983abd2a1cd0816852a3dc9e71
patreon-verification=OET3x80biWWtaeI5

Certificate (current)

from 2026-03-23 to 2026-06-21

Expires in 33 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.3blue1brown.com/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=31536000