If not found, it asks your ISP’s DNS resolver, which usually finds the answer in milliseconds.

When you type a URL into your browser, a lightning-fast process takes place in the background: You type www.example.com .

The "librarian" that finds the IP address for your domain.

The first step in translating human-readable names to IP addresses. TLD Server: Manages extensions like .com or .net .

Understanding the Domain Name System (DNS): The Internet's Phonebook