What powers seiu521.org?
Last seen Sep 2026 · 42 technologies across 20 categories
Analytics
Authentication
CDN
CMS
Comment systems
Databases
Font scripts
Hosting
JavaScript libraries
Load balancers
Maps
Miscellaneous
PaaS
Programming languages
Security
UI frameworks
Web frameworks
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 57% phone
- 43% desktop
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.17 / 10 · ranked #1,311,816 of all domains
36 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.4 s |
| INP | 50 ms |
| CLS | 0.1 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United States)
- Weight: 9.5 MB · 128 requests
- WordPress theme: boiler-plateresources · all themes
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC reject
- SSL: Let's Encrypt, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 2,905,456, 3 hosts
- Verified with: Apple Business, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.seiu521.org | 33 |
| members.seiu521.org | 19 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Sep 2026
- detected Cloudflare Bot Management Sep 2026
- dropped Cloudflare Aug 2026
- dropped Cloudflare Bot Management Aug 2026
- detected Endurance Page Cache Jun 2026
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- dropped Nginx Jan 2026
- detected Apache HTTP Server Dec 2025
- detected Twitter Emoji (Twemoji) Dec 2025