What powers three21auto.com?

Last seen Oct 2026 · 15 technologies across 9 categories

CDN

Cloudflare
since Sep 2022

Issue trackers

Sentry
since Oct 2026

JavaScript frameworks

Nuxt.js
since Oct 2026
Vue.js
since Oct 2026

Miscellaneous

HTTP/3
since Sep 2026
Open Graph
since Sep 2022

Performance

Cloudflare Zaraz
since Oct 2026
Priority Hints
since Jul 2025

Programming languages

Node.js
since Oct 2026

Security

Cloudflare Bot Management
since Sep 2022
HSTS
since Oct 2022

Tag managers

Google Tag Manager
since Apr 2023

UI frameworks

Radix UI
since Oct 2026
shadcn/ui
since Oct 2026
Tailwind CSS
since Oct 2026

AI Crawlers

Blocks 2 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.

Training crawlers

  • CCBot Blocked

Search and AI assistants

  • PetalBot Blocked

The other 31 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.

  • robots.txt found
  • llms.txt not found
  • ai.txt not found

See who blocks each AI crawler across the web

AI Crawlers

2 of 33 AI crawlers blocked

Full breakdown

Audience

  • 83% phone
  • 17% desktop
  • United States

Where the site's Chrome visitors come from, largest estimated audience first.

Open Page Rank

0.63 / 10 · ranked #21,375,851 of all domains

4 referring domains · OpenPageRank

Core Web Vitals

LCP2.4 s
INP250 ms
CLS0.1
TTFB1000 ms

Real user p75, Chrome UX Report, Sep 2026.

Page

  • Language: English (United States)
  • CDN: Cloudflare
  • Weight: 1.0 MB · 172 requests
  • Structured data: JSON-LD, OpenGraph, Twitter Cards

Homepage as crawled by the HTTP Archive, Oct 2026.

Organisation

  • Three 21 Auto

From the homepage's own structured data (Oct 2026).

Infrastructure

DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted

Full technology history →
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