Emails4Corporations is a free public database of corporate email address patterns and main corporate telephone numbers.

This free resource provides the email address patterns for companies of all shapes and sizes. What is an email address pattern? It is how the corporation structures the email addresses for its employees, also known as the email address format. Almost every company employs an email address pattern for their corporate email addresses, so once you discover the pattern, you will be able to correctly guess the email address for every person you meet or come across at a particular organization.