What powers sem.org?
Last seen Aug 2026 · 14 technologies across 12 categories
Authentication
Facebook Login
since Oct 2023
CDN
Google Hosted Libraries
since Apr 2022
Font Scripts
Google Font API
since Aug 2017
JavaScript Frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Security
HSTS
since Jun 2023
UI frameworks
Web frameworks
Microsoft ASP.NET
since Feb 2024
Web servers
Nginx
since Aug 2018
Webmail
Microsoft 365
since Sep 2022
Widgets
FlexSlider
since Aug 2018
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 81% desktop
- 19% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.72 / 10 · ranked #298,441 of all domains
131 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 1200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 3.1 MB · 30 requests
- Structured data: Microdata, OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Society for Experimental Mechanics
- Founded: 1943
- Country: United States
From Wikidata (CC0).
Infrastructure
- Hosted on AS17378 - TierPoint, LLC (144.202.154.65)
- DNS: tnsc.net
- Email: no MX record returned, SPF names Microsoft 365
- Email security: SPF (hard fail)
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 75,423, 3 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted