What powers calvinschool.org?
Last seen Jun 2026 · 17 technologies across 10 categories
CDN
Amazon CloudFront
since Mar 2021
Google Hosted Libraries
since May 2022
Font scripts
Fundraising & donations
Qgiv
since Jan 2025
JavaScript libraries
Operating systems
Red Hat
since Jul 2019
PaaS
Amazon Web Services
since Mar 2021
Programming languages
Web server extensions
Web servers
Apache Tomcat
since Jul 2019
Webmail
Apple iCloud Mail
since Jan 2023
Google Workspace
since Aug 2022
Audience
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.13 / 10 · ranked #10,734,671 of all domains
5 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 50 ms |
| CLS | 0.1 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- CDN: Amazon CloudFront
- Weight: 2.6 MB · 41 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Apache HTTP Server Sep 2025
- detected Apache Tomcat Sep 2025
- detected mod_jk Sep 2025
- detected OpenSSL Sep 2025
- detected PHP Sep 2025
- detected Red Hat Sep 2025
- detected SweetAlert2 Sep 2025
- dropped SweetAlert2 Aug 2025