PHP 5.3.21
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PHP is a general-purpose scripting language used for web development.
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PHP 5.3.21 companies in the United States
Every PHP 5.3.21 website we detected in the US.
Companies with personnel emails
Only sites where a personal, company-hosted email was found.
Decision makers on LinkedIn
Sites with at least one personnel LinkedIn profile.
Top 100,000 PHP 5.3.21 sites by traffic
Start with the highest-traffic end of the dataset.
Sites on a .com domain
Limit results to PHP 5.3.21 websites on .com domains.
Companies with phone numbers
Only sites where an organisation phone number was found.
Complementary Technologies
PHP 5.3.21 Complementary Technologies
Technologies frequently found with PHP 5.3.21.
Most Frequent Complementary Tech
Apache HTTP Server
294
UNIX
220
OpenSSL
211
jQuery
195
mod_ssl
167
mod_dav
121
Windows Server
46
IIS
40
bxSlider
33
jQuery UI
33
Live Websites
Websites Using PHP 5.3.21
Live sites we caught running PHP 5.3.21 in the wild, straight from the latest crawl.
| Domain | Server Location | ASN | Crawl Date |
|---|---|---|---|
| hotelsinlimassolcyprus.com | 🇸🇬 Singapore | Amazon.com, Inc. | July 27, 2026 |
| hotels-alanya.net | 🇩🇪 Germany | Amazon.com, Inc. | July 26, 2026 |
| puntacana-hotels.org | 🇺🇸 United States | Unified Layer | July 26, 2026 |
| hotelsinalanya.net | 🇺🇸 United States | Unified Layer | July 25, 2026 |
| smilesoft.co.kr | 🇰🇷 South Korea | Korea Telecom | July 25, 2026 |
| ftvmilfs.com | 🇺🇸 United States | MOJOHOST | July 24, 2026 |
| catania-hotels.net | 🇩🇪 Germany | Amazon.com, Inc. | July 23, 2026 |
| tophotelspattaya.com | 🇺🇸 United States | Unified Layer | July 23, 2026 |
| tble.kr | 🇰🇷 South Korea | SMILESERV | July 23, 2026 |
| hanoi-hotels.org | 🇺🇸 United States | Unified Layer | July 23, 2026 |
Identifiers
Top PHP 5.3.21 Identifiers
Who is using PHP 5.3.21 and where: top five by detected sites.
Technology
Apache HTTP Server
294
UNIX
220
OpenSSL
211
jQuery
195
mod_ssl
167
Language
Korean
141
English
66
Chinese
36
Russian
14
Latin
12
ASN
Korea Telecom
88
SMILESERV
55
CommuniLink Internet Limited.
36
CEZNET s.r.o.
14
Hetzner Online GmbH
14
TLD
com
149
kr
101
hk
15
ru
15
net
14
Country
South Korea
164
Hong Kong
44
United States
37
China
16
Russia
16
Deep Dive
Most Frequent PHP 5.3.21 Identifiers and Complementary Tech
Most frequently encountered identifiers for PHP 5.3.21 and its complementary technologies.
| Technology | Sites |
|---|---|
Apache HTTP Server | 294 |
UNIX | 220 |
OpenSSL | 211 |
jQuery | 195 |
mod_ssl | 167 |
|
mod_dav | 121 |
Windows Server | 46 |
IIS | 40 |
bxSlider | 33 |
jQuery UI | 33 |
Bootstrap | 31 |
Slick | 30 |
|
jQuery Migrate | 29 |
|
jQuery CDN | 24 |
Google Analytics | 23 |
MySQL | 22 |
WordPress | 21 |
CentOS | 20 |
Nginx | 20 |
Zend | 18 |
Naver Analytics | 17 |
YouTube | 17 |
Lightbox | 16 |
Google Hosted Libraries | 14 |
Cloudflare | 13 |
| Language | Sites |
|---|---|
| Korean | 141 |
| English | 66 |
| Chinese | 36 |
| Russian | 14 |
| Latin | 12 |
| Japanese | 7 |
| Polish | 7 |
| Czech | 5 |
| French | 5 |
| Spanish | 5 |
| Afrikaans | 4 |
| Dutch | 4 |
| Italian | 3 |
| Slovak | 3 |
| Catalan | 2 |
| Croatian | 2 |
| Hungarian | 2 |
| Norwegian Nynorsk | 2 |
| Xhosa | 2 |
| Yoruba | 2 |
| Belarusian | 1 |
| Bosnian | 1 |
| Bulgarian | 1 |
| Welsh | 1 |
| German | 1 |
| Esperanto | 1 |
| Indonesian | 1 |
| Malay | 1 |
| Norwegian Bokmål | 1 |
| Romanian | 1 |
| Slovenian | 1 |
| Shona | 1 |
| Southern Sotho | 1 |
| Tagalog | 1 |
| Turkish | 1 |
| Vietnamese | 1 |
| ASN | Sites |
|---|---|
| Korea Telecom | 88 |
| SMILESERV | 55 |
| CommuniLink Internet Limited. | 36 |
| CEZNET s.r.o. | 14 |
| Hetzner Online GmbH | 14 |
| SK Broadband Co Ltd | 14 |
| TAOS NET LLC | 14 |
| CHINA UNICOM China169 Backbone | 9 |
| Cloudflare, Inc. | 7 |
| Combell NV | 7 |
| Unified Layer | 6 |
| CS LOXINFO Public Company Limited. | 5 |
| First Server Limited | 5 |
| Hangzhou Alibaba Advertising Co.,Ltd. | 5 |
| OVH SAS | 5 |
| Amazon.com, Inc. | 4 |
| Brownrice Internet, Inc. | 4 |
| Tencent Building, Kejizhongyi Avenue | 4 |
| AROSSCLOUD INC. | 3 |
| E-Mind Srl | 3 |
| LG DACOM Corporation | 3 |
| MOJOHOST | 3 |
| MTS PJSC | 3 |
| New Media Group Limited | 3 |
| One New Zealand Group Limited | 3 |
| Scaleway SAS | 3 |
| Zet Maximum limited | 3 |
| DataBank Holdings, Ltd. | 2 |
| HAL Internet, Internet Service Provider, Tottori, Japan | 2 |
| Liquid Web, L.L.C | 2 |
| Microsoft Corporation | 2 |
| PrivateSystems Networks | 2 |
| Alibaba US Technology Co., Ltd. | 1 |
| Ans Academy Limited | 1 |
| China Unicom Beijing Province Network | 1 |
| DataWeb Global Group B.V. | 1 |
| Enix SAS | 1 |
| Etix Everywhere Ouest SAS | 1 |
| EuroByte LLC | 1 |
| Golta Home Net | 1 |
| Host Europe GmbH | 1 |
| HostPapa | 1 |
| IDC Frontier Inc. | 1 |
| Intelesi LLC | 1 |
| Jsc Balticom | 1 |
| LLC Babilon-T | 1 |
| O2switch SAS | 1 |
| Orange Polska Spolka Akcyjna | 1 |
| Ozkula Internet Hizmetleri Tic. LTD. STI. | 1 |
| SAKURA Internet Inc. | 1 |
| SMARTVALUE Co.,Ltd. | 1 |
| SaiNet | 1 |
| Servnet Mexico, S.A. de C.V. | 1 |
| Simply Bits, LLC | 1 |
| Telekom Slovenije, d.d. | 1 |
| Uniserver Internet B.V. | 1 |
| VNET a.s. | 1 |
| Velnet Telecom, LLC | 1 |
| eServer s.r.o. | 1 |
| TLD | Sites |
|---|---|
| com | 149 |
| kr | 101 |
| hk | 15 |
| ru | 15 |
| net | 14 |
| cz | 10 |
| org | 10 |
| pl | 10 |
| jp | 6 |
| eu | 3 |
| be | 2 |
| biz | 2 |
| cn | 2 |
| es | 2 |
| sk | 2 |
| best | 1 |
| de | 1 |
| fr | 1 |
| group | 1 |
| it | 1 |
| lv | 1 |
| mo | 1 |
| nl | 1 |
| online | 1 |
| se | 1 |
| si | 1 |
| tj | 1 |
| tk | 1 |
| tv | 1 |
| ua | 1 |
| uk | 1 |
| vn | 1 |
| Country | Sites |
|---|---|
| 🇰🇷 South Korea | 164 |
| 🇭🇰 Hong Kong | 44 |
| 🇺🇸 United States | 37 |
| 🇨🇳 China | 16 |
| 🇷🇺 Russia | 16 |
| 🇩🇪 Germany | 14 |
| 🇨🇿 Czech Republic | 12 |
| 🇫🇷 France | 9 |
| 🇯🇵 Japan | 8 |
| 🇧🇪 Belgium | 5 |
| 🇹🇭 Thailand | 5 |
| Unknown | 4 |
| 🇮🇹 Italy | 3 |
| 🇳🇿 New Zealand | 3 |
| 🇪🇸 Spain | 2 |
| 🇵🇱 Poland | 2 |
| 🇸🇰 Slovakia | 2 |
| 🇺🇦 Ukraine | 2 |
| 🇬🇧 United Kingdom | 1 |
| 🇱🇻 Latvia | 1 |
| 🇲🇴 Macau | 1 |
| 🇲🇽 Mexico | 1 |
| 🇳🇱 Netherlands | 1 |
| 🇸🇪 Sweden | 1 |
| 🇸🇬 Singapore | 1 |
| 🇸🇮 Slovenia | 1 |
| 🇹🇯 Tajikistan | 1 |
| 🇹🇷 Turkey | 1 |
| 🇹🇻 Tuvalu | 1 |
| 🇻🇳 Vietnam | 1 |