What powers w3fools.com?
Last seen Feb 2026 · 5 technologies across 4 categories
Analytics
Google Analytics
since Apr 2019
Caching
Varnish
since Apr 2019
CDN
Fastly
since Jan 2016
GitHub Pages
since Jan 2016
Mailgun
since May 2024
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Open Page Rank
4.19 / 10 · ranked #457,906 of all domains
87 referring domains · OpenPageRank
Infrastructure
- Hosted on GitHub (192.30.252.153)
- DNS: Google Cloud DNS
- Email: no MX record returned, SPF names Mailgun
- Email security: SPF (soft fail), DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 1,144,261, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted