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Site Info - Usps.com

Overview of web technologies used by Usps.com.

Website Background

Welcome | USPS
Welcome to USPS.com. Track packages, pay and print postage with Click-N-Ship, schedule free package pickups, look up ZIP Codes, calculate postage prices, and find everything you need for sending mail and shipping packages.

Description on Homepage

Top 1k among all websites

Popularity rank

Drupal is an open source content management system written in PHP, originally developed by Dries Buytaert.

Drupal 8
56% of sites use a newer version
used on a subdomain

Oracle CX Commerce (formerly Oracle Commerce Platform and ATG Web Commerce) is a Java-based e-commerce platform by Oracle.

Oracle CX Commerce
used until recently

PHP is a scripting language for creating websites.

PHP
used on a subdomain

Java is a general-purpose language originally developed by Sun Microsystems.

Java
used on a subdomain

Microsoft's Active Server Pages technology on the .NET framework.

ASP.NET
used until recently

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

JavaScript

WebAssembly is a portable binary-code format for executable programs, used within web pages.

WebAssembly
used until recently

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

jQuery 3.7.1
0% of sites use a newer version

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Bootstrap

Popper is an open source JavaScript library for tooltips and popovers.

Popper

RequireJS is a JavaScript file and module loader.

RequireJS
used on inner pages

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the visitors browser.

Modernizr
used on a subdomain

The Dojo Toolkit is a modular JavaScript library maintained by the Dojo Foundation.

Dojo
used on a subdomain

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Bootstrap

Akamai provides a content delivery network. This includes the former brands Instart Logic and StackPath.

Akamai
hosting info partly based on data from ipinfo.io

Akamai provides a content delivery network.

Akamai
used until recently

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

DigiCert

Google Hosted Libraries (formerly called Google Libraries API) is a content distribution network for the most popular, open-source JavaScript libraries, provided by Google.

Google Hosted Libraries
used until recently

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services.

Google Analytics
used on inner pages

Meta Pixel (formerly Facebook Pixel) is an analytics tool to track actions on websites.

Meta Pixel
used until recently

Microsoft UET (Universal Event Tracking) records what visitors do on a website after they click on an ad.

Microsoft UET
used until recently

The LinkedIn Insight Tag helps to optimize LinkedIn campaigns.

LinkedIn Insight Tag
used until recently

The Pinterest Tag tracks website visitors after seeing a Pinterest ad.

Pinterest Tag
used until recently

The Google Advertising network consists of AdSense, DoubleClick and other services.

Google Ads
used on inner pages

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

Google Tag Manager

External Cascading Style Sheets define style rules in a separate CSS file.

External CSS

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

Embedded CSS

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

Inline CSS

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Session Cookies
used on a subdomain

Persistent cookies with an expiration time of up to 1 day.

Cookies expiring in hours

Persistent cookies with an expiration time between 1 month and 1 year.

Cookies expiring in months

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-HttpOnly Cookies

Secure cookies are used only via an encrypted connections, which may increase security.

Secure Cookies

Gzip (GNU zip) is a file compression algorithm.

Gzip Compression

A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.

Strong ETag
used on a subdomain

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.

IPv6

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

HTTP/2

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

HTTP Strict Transport Security

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

Default subdomain www

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

Default protocol https

Persistent cookies with an expiration time of more than 10 years.

Cookies expiring in decades
used until recently

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

HttpOnly Cookies
used until recently

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Non-Secure Cookies
used until recently

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Open Graph

Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets.

Twitter/X Cards

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

JSON-LD

HTML5 is the fifth revision of the HTML standard.

HTML5

Transitional version of HTML.

HTML Transitional 4.0
used on a subdomain

Windows-1252 is an 8-bit character encoding, designed to cover West European alphabets.

Windows-1252

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

UTF-8
used on inner pages

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.

PNG

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

JPEG

Scalable Vector Graphics (SVG) is an XML-based vector image format.

SVG

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

GIF
used until recently

Commercial entities

.com

United States

English

 

 

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