Free Random IP Generator Online

What is a Random IP Generator?

A Random IP Generator is a tool that allows you to generate random IP addresses conveniently. This Random IP Generator by LambdaTest is free, easy to use, and doesn't have any ads or popups. Try now!

How does this Random IP Generator works?

This tool randomly generates IP addresses for your needs. It's written in JavaScript and entirely runs in the browser. First, it processes the input options.

The options allow you to enter startIp and endIp IP version 4 values, consisting 4 octets. The value for each Octet can range from 0-255. The below formula allows octects to be converted into a single decimal value:

a×(256x256x256)+b×(256×256)+c×256+d

The conversion formula can also be written as a<<24 + b<<16 + c<<8 + d. This results in generating integer values startIpDec and endIpDec.

Next, if the program detects that it is allowed to generate private IP addresses, then it creates a range of addresses between [startIpDec, endIpDec). For each disabled private IP address, the program cuts out a range of addresses [[start1, end1], [start2, end2], …].

After that the Math.random() function comes into play which allows the generation of random IP addresses from the given allowed range, the program first randomly selects one of the ranges and then randomly selects a number from that range.

This process is repeated count times, resulting in count random IP addresses, which are converted back to dotted form.

Below formula is used for each individual octet:

a = (dec>>24)&0xff, b = (dec>>16)&0xff, c = (dec>>8)&0xff, d = dec&0xff

If a non-decimal base is selected then bignumber.js library converts each octet(a = new BigNumber(a)) to a new base by turning it into a big number in the desired base by the below command:

a = a.toString(base)

This function converts all octets in the required base to their decimal equivalent and concatenates them with the octetSeparator character. The ipSeparator character is then placed between each address and the next, thus displaying all the addresses on a single line.