Site Info - Renren.com

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.

China Unicom (formerly China Netcom) is a Chinese telecom operator, also offering web hosting services.

China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.

China Unicom (formerly China Netcom) is a Chinese telecom operator, also offering web hosting services.

NetEase (also known as 163.com) is a Chinese internet technology company.

Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.

DigiCert is an SSL certificate authority. This includes Verizon, whose Enterprise SSL Business has been acquired by DigiCert.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Gzip (GNU zip) is a file compression algorithm.

HTTP/2 is the second major version of the HTTP network protocol.

Brotli is a lossless compression algorithm developed by Google.

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

Commercial entities