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dot address

Tip:To find out the dot address (such as 205.245.172.72) for a given domain name, Windows users can go to their MS DOS prompt screen and enter: ping xxx.yyy where xxx is the second-level domain name like "whatis" and yyy is the top-level domain name like "com").

A dot address (sometimes known as a dotted quad address) refers to the notation that expresses the four-byte (32-bit) IP address as a sequence of four decimal numbers separated by dots. Each number represents the binary value of one of four bytes. Look at this Internet address, for example:

205.245.172.72

The first byte in the 32-bit sequence contains the binary equivalent of decimal 205, the second byte contains the equivalent of 245, the third of 172, and the fourth of 72.

The separation of the four numbers with dots makes the address easier to read. Of course, most of us remember an Internet location with a domain name rather than an Internet address. But we sometimes need the dot address form when we configure a Web browser or get set up with an access provider.

This was last updated in September 2005

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