What powers 
ersi.info?
Last seen Sep 2026 · 20 technologies across 16 categories
Analytics
CDN
CMS
Ecommerce
Editors
IaaS
Issue trackers
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
Security
UI frameworks
Web servers
AI Crawlers
Blocks 1 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Search and AI assistants
- PetalBot Blocked
The other 32 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt found
- ai.txt not checked
AI Crawlers
1 of 33 AI crawlers blocked
Standards: llms.txt
Audience
- 83% desktop
- 17% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.81 / 10 · ranked #709,453 of all domains
59 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Google
- Weight: 1.9 MB · 205 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Environment Rating Scales Institute
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Wix (185.230.63.107)
- DNS: Amazon Route 53
- Email: ersi.info
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 6,856,924, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.ersi.info | 15 |
| online.ersi.info | 5 |
| ersi.info | 4 |
| training.ersi.info | 3 |
Full technology history →
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