getbootstrap.com

.com toplist crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 763 ms crawled 2026-05-18

US · 172.66.169.22 · AS13335 Cloudflare, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: Bootstrap · The most popular HTML, CSS, and JS library in the world.
Description: Powerful, extensible, and feature-packed frontend toolkit. Build and customize with Sass, utilize prebuilt grid system and components, and bring projects to life with powerful JavaScript plugins.
Language: en
Generator: Astro v5.13.2
Canonical: https://getbootstrap.com/

Open Graph

url: https://getbootstrap.com/
title: Bootstrap
description: Powerful, extensible, and feature-packed frontend toolkit. Build and customize with Sass, utilize prebuilt grid system and components, and bring projects to life with powerful JavaScript plugins.

Technology

CDN: Cloudflare

Analytics

Fathom

Third-party hosts loaded (3)

ak7kmzkzhq-dsn.algolia.net×1
cdn.carbonads.com×1
cdn.usefathom.com×1

Social

Registration

Registrar

GoDaddy.com, LLC

Created

2012-01-10

Expires

2027-01-10 235 days left

Updated

2026-01-11

Name servers

iris.ns.cloudflare.com
tom.ns.cloudflare.com

DNS records live

NS

iris.ns.cloudflare.com
tom.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

yandex-verification: 92333f69985eb59b

Email authentication weak

SPF

v=spf1 a mx include:_spf.google.com -all

strict (-all)

DMARC

not published

DKIM

s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3/oCPgul0E9g3EdQXZgUH0ri1svRfCTSZXnCOiz8jIIQAdp2geFKnxoRQnC3BeGiROiooPIqY9S/hRG0mC…
s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDV/6SlPek7Q4D+l1HNZd30fIyrIxM+aEsntsZQN4PUCJdSZM2U9c1X8/lbRBJl7Lj8TJZvXt0qwru4flXCqREJub…

selectors probed

Certificate (current)

WE1

from 2026-03-20 to 2026-06-18

Expires in 29 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 60/100 Checked live page: https://getbootstrap.com/

present

strict-transport-security
x-content-type-options

findings

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

Header values

x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubDomains; preload