You may be behind your company's firewall or have other software that prevents you from reaching an edge server when testing your site.

How to

Close all browser windows and then reopen your browser.
Go to the page you want to test.
Open your browser's network utility function.
Make a request on the web page you're testing.
Search for the Akamai response header in the network utility function. It may look like X-Akamai-*.

Next steps

If you see the Akamai response header, go ahead and test your site. If you don't see the header, switch to a mobile hotspot from outside your company's network and try again.