Websites Using Quad9

Quad9 is a free recursive DNS resolver with built-in security and privacy protection.

Categories: CDN

Official website: https://www.quad9.net

Quad9 is ranked #89 of 103 in CDN by website adoption.

CDN alternatives ranked by popularity

1. Cloudflare — 174,692 websites
2. Fastly — 46,592 websites
3. cdnjs — 40,400 websites
4. jsDelivr — 34,680 websites
5. Google Hosted Libraries — 22,218 websites
6. Amazon CloudFront — 18,004 websites
7. jQuery CDN — 13,995 websites
8. Unpkg — 10,465 websites
9. Akamai — 6,061 websites
10. Google Cloud CDN — 5,629 websites

How WhatStack detects Quad9

WhatStack detects Quad9 by analyzing HTTP headers, HTML source code, JavaScript globals, meta tags, cookies, DNS records, and ads.txt entries using signature-based pattern matching across 10 different analyzers.

Frequently Asked Questions

What is Quad9?

Quad9 is a free recursive DNS resolver with built-in security and privacy protection.

How many websites use Quad9?

WhatStack has detected Quad9 on 0 websites in our database.

How do you detect Quad9?

We analyze HTTP headers, HTML source, JavaScript globals, meta tags, cookies, DNS records, and ads.txt entries to identify Quad9 with high accuracy using signature-based pattern matching.