What powers fatcalc.com?
Last seen Jun 2026 · 34 technologies across 14 categories
Advertising
33Across
since Apr 2022
AdThrive
since Apr 2022
Amazon Advertising
since Apr 2022
DoubleClick Campaign Manager (DCM)
since May 2022
Google AdSense
since Aug 2020
Google Publisher Tag
since Apr 2022
ID5
since Dec 2023
OpenX
since Apr 2022
PubMatic
since Apr 2022
Rubicon Project
since Apr 2022
TripleLift
since Apr 2022
Analytics
CDN
Amazon CloudFront
since Jul 2019
Cloudflare
since Feb 2024
JavaScript frameworks
JavaScript libraries
Load balancers
Amazon ALB
since Aug 2025
Miscellaneous
PaaS
Amazon Web Services
since Jul 2019
Performance
Priority Hints
since Dec 2023
Programming languages
Node.js
since Jul 2019
TypeScript
since Jun 2021
Security
Cloudflare Bot Management
since Feb 2024
reCAPTCHA
since Apr 2022
Segmentation
Adobe Audience Manager
since Apr 2022
Tag managers
Google Tag Manager
since Jul 2019
Web servers
Audience
- 79% phone
- 21% desktop
United States
United Kingdom
Canada
Australia
Philippines
Pakistan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.91 / 10 · ranked #3,827,746 of all domains
19 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 225 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- CDN: Amazon CloudFront
- Weight: 4.1 MB · 2,019 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| fatcalc.com | 31 |
| www.fatcalc.com | 30 |
Full technology history →
Report an incorrect detection
Recent changes
- detected 33Across Jun 2026
- detected Cloudflare Jun 2026
- detected Cloudflare Bot Management Jun 2026
- dropped 33Across May 2026
- dropped Microsoft ASP.NET Apr 2026
- dropped jsDelivr Mar 2026
- detected OpenX Mar 2026
- dropped Akamai Feb 2026
- dropped Akamai Bot Manager Feb 2026
- dropped OpenX Feb 2026
- dropped PerimeterX Feb 2026
- detected 33Across Dec 2025
- detected Akamai Dec 2025
- detected Akamai Bot Manager Dec 2025
- detected PerimeterX Dec 2025
- dropped 33Across Nov 2025
- detected jsDelivr Nov 2025
- detected OpenX Nov 2025
- detected TripleLift Nov 2025
- dropped Confiant Oct 2025
- dropped TripleLift Oct 2025
- detected 33Across Sep 2025
- detected Amazon Advertising Aug 2025
- detected Amazon ALB Aug 2025
- detected comScore Aug 2025
- detected Confiant Aug 2025
- detected core-js Aug 2025
- detected DoubleClick Campaign Manager (DCM) Aug 2025
- detected Google AdSense Aug 2025
- detected Google Publisher Tag Aug 2025
- detected ID5 Aug 2025
- detected Prebid Aug 2025
- detected PubMatic Aug 2025
- detected reCAPTCHA Aug 2025
- detected Rubicon Project Aug 2025
- detected TripleLift Aug 2025