What powers retrospring.net?
Last seen Aug 2026 · 12 technologies across 8 categories
Analytics
Cloudflare Browser Insights
since Nov 2025
Matomo Analytics
since Aug 2022
Caching
Varnish
since Sep 2025
CDN
Cloudflare
since Jan 2019
Fastly
since Sep 2025
Issue trackers
Canny
since Apr 2023
JavaScript graphics
Chart.js
since Sep 2025
Miscellaneous
PaaS
GitHub Pages
since Sep 2025
Web servers
Caddy
since Aug 2022
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
Audience
- 72% phone
- 28% desktop
Indonesia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.16 / 10 · ranked #472,717 of all domains
125 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| CLS | 0 |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Cloudflare, Fastly
- Weight: 0.1 MB · 15 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Cloudflare (104.21.5.157)
- DNS: Cloudflare DNS
- Email: rrerr.net
- Email security: SPF (hard fail), DMARC monitor only, MTA-STS, BIMI
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Oct 2026
- Common Crawl link graph: rank 1,879,937, 3 hosts
- Verified with: Atlassian
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| retrospring.net | 8 |
| blog.retrospring.net | 7 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Chart.js Jul 2026
- detected Cloudflare Browser Insights Jul 2026
- detected Fastly Jul 2026
- detected GitHub Pages Jul 2026
- detected Varnish Jul 2026
- detected Cloudflare Browser Insights Nov 2025
- dropped PWA Oct 2025
- dropped Ruby Oct 2025
- dropped Ruby on Rails Oct 2025
- dropped Stimulus Oct 2025
- dropped Turbo Oct 2025