Did you ever wonder how accessing a certain website works? Behind that familiar name like https://www.facebook.com/, there’s a certain number, so-called IP address, that your browser needs to “dial”.

Your browser doesn’t automatically know where facebook.com is located and needs to first find its “number”. There are several Domain Name Servers (DNS) in the world that serve like an address book. Their numbers never change, so your browser can always call them to ask about “the phone number” of facebook.com or google.com or any other website you visit. After the server gives the number, your browser “calls” to facebook.com.

Read more: https://hackernoon.com/the-user-experience-of-mobile-phone-numbers-4507deee3495

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