What powers sanmateo4cs.org?
Last seen Sep 2026 · 25 technologies across 13 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
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
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 73% desktop
- 27% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.03 / 10 · ranked #1,536,194 of all domains
31 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.3 s |
| INP | 25 ms |
| CLS | 0.15 |
| TTFB | 3100 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Cloudflare, Fastly
- Weight: 2.3 MB · 88 requests
- WordPress theme: vorosa (child: vorosa-child) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- 4Cs of San Mateo County
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Fastly (151.101.194.159)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (hard fail), no DMARC record
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 200,052, 2 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Perfmatters Aug 2026
- detected RSS Jul 2026
- detected Twitter Emoji (Twemoji) Jul 2026
- dropped Cloudflare Browser Insights Jun 2026
- dropped HTTP/3 Jun 2026
- dropped Google Tag Manager May 2026
- dropped RSS May 2026
- dropped Twitter Emoji (Twemoji) May 2026
- dropped Underscore.js May 2026
- detected jsDelivr Apr 2026
- detected Swiper Apr 2026
- dropped Contact Form 7 Mar 2026
- dropped jQuery Migrate Mar 2026
- dropped OWL Carousel Mar 2026
- dropped Slick Mar 2026
- detected Twitter Emoji (Twemoji) Mar 2026
- detected Cloudflare Feb 2026
- detected Cloudflare Browser Insights Feb 2026
- detected HTTP/3 Feb 2026
- detected jQuery CDN Feb 2026
- detected Perfmatters Feb 2026
- detected The Events Calendar Feb 2026
- detected Underscore.js Feb 2026
- detected core-js Dec 2025
- detected jQuery UI Dec 2025
- detected Priority Hints Dec 2025
- dropped Amazon Web Services Nov 2025
- dropped Apache HTTP Server Nov 2025
- dropped OpenSSL Nov 2025