What powers c21ag.com?
Last seen Sep 2026 · 42 technologies across 19 categories
Analytics
Caching
CDN
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript libraries
Maps
Miscellaneous
Performance
Programming languages
RUM
Security
UI frameworks
Video players
Web servers
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 not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.18 / 10 · ranked #3,135,279 of all domains
16 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| INP | 125 ms |
| CLS | 0.2 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- Weight: 4.5 MB · 301 requests
- WordPress theme: avada (child: realadvantage-plus) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- CENTURY 21 Advantage Gold
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Liquid Web (67.43.13.108)
- DNS: agentreputation.net
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC quarantine
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Jan 2027
- Common Crawl link graph: rank 14,317,851, 3 hosts
- Verified with: GlobalSign, Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.c21ag.com | 39 |
| search.c21ag.com | 30 |
Full technology history →
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Recent changes
- detected All in One SEO Sep 2026
- detected MonsterInsights Sep 2026
- detected cdnjs Jul 2026
- detected Cloudflare Jul 2026
- detected GSAP Jul 2026
- detected iHomefinder IDX Jul 2026
- detected Java Jul 2026
- detected Litespeed Cache Jul 2026
- detected New Relic Jul 2026
- detected Priority Hints Jul 2026
- detected Really Simple SSL & Security Jul 2026
- detected YouTube Jul 2026
- dropped lit-element Feb 2026
- dropped lit-html Feb 2026