WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.
Disclaimer: The data used in this report is collected from the current VersionDB release (February 2026) containing a total of 12,727,168 domains. All statistics reflect this dataset and do not claim to represent all websites globally.
WordPress 3.9.21 Complementary Technologies
Technologies frequently found with WordPress 3.9.21.
Live WordPress 3.9.21 Sites
3
Complementary Tech
29
Most Frequent Complementary Tech
Websites Using WordPress 3.9.21
An unordered, non-ranked list generated from observed technology data.
| Domain | Server Location | ASN | Crawl Date |
|---|---|---|---|
| arpek.com.tr | 🇹🇷 Turkey | Cizgi Telekomunikasyon Anonim Sirketi | February 14, 2026 |
| paintedvintage.com | 🇺🇸 United States | GoDaddy.com, LLC | February 14, 2026 |
| noticiasdot.com | 🇫🇷 France | OVH SAS | February 7, 2026 |
Find Your Customers By Their Technologies
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Buy Now — $199.95 USDTop WordPress 3.9.21 Identifiers
Who is using WordPress 3.9.21 and where.
Countries
Top 5 most detected countries for WordPress 3.9.21
ASNs
Top 5 most detected ASNs for WordPress 3.9.21
Languages
Top 5 most detected Languages for WordPress 3.9.21
TLDs
Top 5 most detected TLDs for WordPress 3.9.21
Most Frequent WordPress 3.9.21 Identifiers and Complementary Tech
Most frequently encountered identifiers for WordPress 3.9.21 and its complementary technologies.
| Technology | Sites |
|---|---|
| MySQL | 3 |
| jQuery | 3 |
| jQuery Migrate | 3 |
| PHP | 3 |
| Google AdSense | 2 |
| Gravatar | 2 |
| Akismet | 2 |
| IIS | 1 |
| WordPress Super Cache | 1 |
| Apache HTTP Server | 1 |
| 1 | |
| jsDelivr | 1 |
| FlexSlider | 1 |
| Smash Balloon Instagram Feed | 1 |
| Jetpack | 1 |
| Onsen UI | 1 |
| WPML | 1 |
| Bootstrap | 1 |
| Windows Server | 1 |
| Yoast SEO | 1 |
| Osano | 1 |
| Google Analytics | 1 |
| Google Tag Manager | 1 |
| Microsoft ASP.NET | 1 |
| Plesk | 1 |
| SWFObject | 1 |
| Cloudflare | 1 |
| HTTP/3 | 1 |
| Cloudflare Browser Insights | 1 |
| Language | Sites |
|---|---|
| English | 2 |
| Spanish | 1 |
| ASN | Sites |
|---|---|
| GoDaddy.com, LLC | 1 |
| Cizgi Telekomunikasyon Anonim Sirketi | 1 |
| Cloudflare, Inc. | 1 |
| TLD | Sites |
|---|---|
| com | 2 |
| com.tr | 1 |
| Country | Sites |
|---|---|
| 🇺🇸 United States | 1 |
| 🇹🇷 Turkey | 1 |