What powers 
oncallhealth.us?
Last seen Sep 2026 · 10 technologies across 9 categories
CDN
Cloudflare
since Sep 2020
Font scripts
Google Font API
since May 2020
Miscellaneous
HTTP/3
since Nov 2022
PaaS
Amazon Web Services
since Nov 2022
Programming languages
Python
since May 2020
Security
Cloudflare Bot Management
since Nov 2025
HSTS
since Nov 2022
UI frameworks
Bootstrap
since Feb 2021
Web frameworks
Django
since May 2020
Webmail
Google Workspace
since Nov 2022
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
- 65% desktop
- 35% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.72 / 10 · ranked #751,493 of all domains
47 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 50 ms |
| CLS | 0.1 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- CDN: Cloudflare
- Weight: 1.2 MB · 12 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Amazon Web Services (18.238.80.21)
- DNS: Amazon Route 53
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC quarantine
- SSL: Let's Encrypt, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 7,510,516, 5 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Bot Management Nov 2025