What powers subprotocol.com?
Last seen Oct 2026 · 10 technologies across 8 categories
Analytics
Google Analytics
since May 2021
Caching
Varnish
since Mar 2021
CDN
Fastly
since Mar 2021
Google Hosted Libraries
since Feb 2022
Mailgun
since May 2024
Font scripts
Google Font API
since Mar 2021
JavaScript libraries
Miscellaneous
RSS
since Dec 2022
PaaS
GitHub Pages
since Mar 2021
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Open Page Rank
2.31 / 10 · ranked #2,852,178 of all domains
15 referring domains · OpenPageRank
Page
- Language: English
- CDN: Fastly
- Weight: 1.0 MB · 25 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Fastly (185.199.108.153)
- DNS: Google Cloud DNS
- Email: Mailgun
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 2,112,858
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted