What powers 
karlsims.com?
Last seen Aug 2026 · 4 technologies across 2 categories
Miscellaneous
HTTP/3
since Sep 2022
Web servers
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
AI Crawlers
No AI crawlers blocked
Audience
- 79% desktop
- 21% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #333,534 of all domains
138 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 50 ms |
| CLS | 0.05 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.8 MB · 43 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on IS-AS-1 (67.211.218.75)
- DNS: trouble-free.net
- Email: karlsims.com
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Nov 2026
- Common Crawl link graph: rank 460,727, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.karlsims.com | 4 |
| karlsims.com | 2 |
Full technology history →
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