# Dotted decimal notation

**Dotted decimal notation** or **decimal point ****notation** is the common representation of IP addresses and network masks in Internet Protocol version 4 .

Here, each of the four octets is converted into a decimal number and the numbers are appended with a point in between. Examples: 127.0.0.1, 192.0.2.210, etc.

If leading zeros are used, an IP address can also be expressed in octal, e.g. B. 0177.0.0.1 for 127.0.0.1. It is still possible to abbreviate octets, e.g. B. 127.0.1, 127.1 or 2130706433 or 017700000001 for 127.0.0.1.

This notation is just a convention; at the machine level, IP addresses and network masks are 32-bit binary numbers .