Here are most of the numbers of the day found with the "Tools" feature on Google in order to find the latest results when searching the keyword "tech support".
NOTE: These numbers are spammed onto popular wikis and forums for their numbers to reach the first page on Google. Almost all of these numbers must be called during American Time Zone or else you will enter an endless loop of boring elevator music. If you're lucky you will catch a 24/7 number, where they can be reached at any point of the day.
1-888-473-8821 - AOL Toll Free Number
1-888-420-8666 - Google Tech Support Number
1-888-302-0444 - McAfee Antivirus Tech Support Number
1-888-955-2855 - Gmail Technical Support
1-800-726-0294 - Macbook Support Arizona
1-855-856-6451 - CANDY CRUSH CUSTOMER SUPPORT (???)
1-844-238-0068 - Amazon Kindle Support
1-800-522-5679 - Windows 10 Support
1-850-777-3086 - Gmail Help Number
1-877-227-5694 - HP Support (http://www.hpsupportphonenumber.com/)
1-888-438-6555 - Kaspersky Tech Support
1-844-897-0441 - Wordpress Technical Support