What powers 
scls.info?
Last seen Sep 2026 · 19 technologies across 13 categories
Analytics
Caching
CDN
CMS
Databases
Font scripts
Hosting
JavaScript libraries
Miscellaneous
PaaS
Programming languages
Security
Webmail
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 not found
- ai.txt not found
- Sep 2026 bytespider removed from robots.txt
- Sep 2026 amazonbot removed from robots.txt
- Sep 2026 applebot-extended removed from robots.txt
- Sep 2026 meta-externalagent removed from robots.txt
- Sep 2026 ccbot removed from robots.txt
- Sep 2026 claudebot removed from robots.txt
AI Crawlers
No AI crawlers blocked
Audience
- 58% desktop
- 42% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.48 / 10 · ranked #910,602 of all domains
35 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 2.1 MB · 42 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- South Central Library System
- Country: United States
From Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.21.87.249, IPv6)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 2,758,014, 5 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped Bootstrap Sep 2026
- dropped jsDelivr Sep 2026
- detected Monsido Aug 2026
- dropped Splide Aug 2026
- detected HSTS Jul 2026
- dropped Amazon SES Jun 2026
- dropped Nginx Dec 2025
- detected Cloudflare Nov 2025
- detected Cloudflare Browser Insights Nov 2025
- detected HTTP/3 Nov 2025