What powers op-f.org?
Last seen Sep 2026 · 14 technologies across 12 categories
CDN
jsDelivr
since Aug 2026
CMS
Umbraco
since Aug 2026
Font scripts
JavaScript graphics
Chart.js
since Jun 2019
JavaScript libraries
Operating systems
Windows Server
since Jan 2019
PaaS
Azure
since Aug 2026
Security
HSTS
since Sep 2022
UI frameworks
Web frameworks
Microsoft ASP.NET
since Jan 2019
Web servers
Apache HTTP Server
since Jan 2019
Webmail
Apple iCloud Mail
since Jan 2023
Microsoft 365
since Oct 2023
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 63% desktop
- 37% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.02 / 10 · ranked #1,552,956 of all domains
30 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 6.1 MB · 29 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Microsoft (40.71.11.138)
- DNS: att.net
- Email: no MX record returned, SPF names Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine
- SSL: DigiCert, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 2,988,023, 4 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.op-f.org | 10 |
| op-f.org | 6 |
| ess.selfservice.op-f.org | 4 |
| mss.selfservice.op-f.org | 4 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Azure Aug 2026
- detected Bootstrap Icons Aug 2026
- detected IIS Aug 2026
- detected jsDelivr Aug 2026
- detected Microsoft ASP.NET Aug 2026
- detected Umbraco Aug 2026
- detected Windows Server Aug 2026
- detected Bootstrap Jul 2026
- detected Chart.js Jul 2026
- detected jQuery Jul 2026