What powers 
sigmapi.org?
Last seen Sep 2026 · 51 technologies across 23 categories
A/B Testing
Analytics
CDN
CMS
Databases
Ecommerce
Font scripts
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Marketing automation
Miscellaneous
Mobile frameworks
Payment processors
Performance
Personalisation
Photo galleries
Programming languages
Reviews
Security
UI frameworks
Webmail
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt found
- llms-full.txt found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt, llms-full.txt
Audience
- 75% desktop
- 25% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.53 / 10 · ranked #859,074 of all domains
36 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 33.0 MB · 337 requests
- WordPress theme: sigmapi · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Sigma Pi Fraternity (Sigma Pi on Wikidata)
- Founded: 1897
- Country: United States
- Profiles: Facebook, X, Instagram, LinkedIn, YouTube
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.21.44.168, IPv6)
- DNS: Cloudflare DNS
- Email: Google Workspace
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 1,195,644, 13 hosts
- Verified with: Brevo, Google, Klaviyo
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| sigmapi.org | 32 |
| shop.sigmapi.org | 26 |
Full technology history →
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Recent changes
- dropped Fast Bundle Sep 2026
- dropped Sentry Sep 2026
- detected Google Pay Aug 2026
- detected Klaviyo Reviews Aug 2026
- dropped Klaviyo Reviews Mar 2026
- detected Twitter Emoji (Twemoji) Jan 2026
- detected Judge.me Dec 2025
- detected Cloudflare Browser Insights Nov 2025