What powers period-calendar.com?
Last seen Jun 2026 · 14 technologies across 12 categories
Advertising
Google AdSense
since May 2021
Infolinks
since Jul 2025
Analytics
Hosting
GoDaddy
since Aug 2022
JavaScript libraries
Message boards
phpBB
since May 2021
PaaS
Amazon Web Services
since Aug 2022
Programming languages
PHP
since May 2021
Security
reCAPTCHA
since Aug 2022
Tag managers
Google Tag Manager
since Aug 2021
Web servers
Webmail
Google Workspace
since Aug 2022
Widgets
Wheelio
since Sep 2021
Audience
- 100% phone
Germany
Brazil
Italy
Spain
Russia
Mexico
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.46 / 10 · ranked #941,456 of all domains
153 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English (United Kingdom)
- Weight: 0.9 MB · 19 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| es.period-calendar.com | 10 |
| kr.period-calendar.com | 10 |
| pt.period-calendar.com | 10 |
| de.period-calendar.com | 9 |
| fr.period-calendar.com | 9 |
| it.period-calendar.com | 9 |
| period-calendar.com | 9 |
| www.period-calendar.com | 9 |
| zh-cn.period-calendar.com | 9 |
| en.period-calendar.com | 8 |
| ru.period-calendar.com | 8 |
| zh-tw.period-calendar.com | 8 |
Full technology history →
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Recent changes
- dropped Google Font API Mar 2026
- detected Google Font API Nov 2025
- dropped Amazon EC2 Aug 2025
- dropped Apache HTTP Server Aug 2025