What powers 
cmpxchg8b.com?
Last seen Aug 2026 · 7 technologies across 5 categories
Blogs
CDN
Programming languages
Web servers
Webmail
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
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 AI crawlers blocked
Audience
- 70% desktop
- 30% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.74 / 10 · ranked #133,225 of all domains
280 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.3 MB · 6 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on RAMNODE (199.241.29.227)
- Email: no MX record returned, SPF names Google Workspace
- Email security: SPF (soft fail)
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 39,693, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| blog.cmpxchg8b.com | 4 |
| lock.cmpxchg8b.com | 3 |