What powers openintro.org?
Last seen Aug 2026 · 10 technologies across 9 categories
Analytics
Font scripts
Hosting
JavaScript Frameworks
JavaScript libraries
Maps
Programming languages
UI frameworks
Web servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| google textbooks | #49 | 280 |
| openintro | #1 | 270 |
| my open math | #11 | 230 |
| openintro statistics | #2 | 140 |
| ti-84 stat | #1 | 52 |
| ti-84 stat | #1 | 52 |
| ti 84 for statistics | #1 | 52 |
| ti 84 for statistics | #1 | 52 |
| ap statistics textbook | #7 | 49 |
| anova formulas | #3 | 35 |
| statistics textbook | #7 | 33 |
| openintro statistics 4th edition | #1 | 21 |
| openmath | #63 | 19 |
| ti 84 calculator for statistics | #2 | 18 |
| openintro statistics pdf | #2 | 18 |
| mlb data set | #2 | 15 |
| how to calculate df | #32 | 14 |
| anova table formula | #5 | 12 |
| open source statistics book | #1 | 12 |
| data present | #1 | 12 |
| anova test formula | #5 | 10 |
| baseball data sets | #3 | 9 |
| book introduction | #86 | 9 |
| ti-84 plus statistics | #1 | 9 |
| ti-84 plus statistics | #1 | 9 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 82% desktop
- 16% phone
- 2% tablet
United States
India
United Kingdom
Indonesia
Mexico
Canada
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.53 / 10 · ranked #155,064 of all domains
201 referring domains · OpenPageRank
Search traffic
2,100 est. monthly organic visits (US)
1,800 keywords in Google's top 30
Core Web Vitals
| LCP | 1.8 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 1.3 MB · 27 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Network Solutions (192.185.65.127)
- Email: openintro.org
- Email security: no SPF record, no DMARC record
- SSL: DigiCert, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 41,617, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| openintro.org | 10 |
| www.openintro.org | 10 |