How can I work out how many IP addresses there are in a given range?

Posted by Jarede on Programmers See other posts from Programmers or by Jarede
Published on 2014-05-29T11:54:07Z Indexed on 2014/05/29 15:52 UTC
Read the original article Hit count: 261

Filed under:

networking

|

networks

I'm wondering if there is a formula to work out the amount of IP addresses in a given range.

I have a system that takes either a single IP address or a start and and end IP address:

A single one might be: 145.16.23.241
A range might be: 145.16.23.122 - 145.16.23.144

The people inputting these aren't technical, nor are they receiving these details from technical people, so suggesting using CIDR notation isn't an answer for me.

I want to be able to highlight that when entering a range such as: 122.100.10.12 - 128.10.200.140 it might not actually be a range and rather 2 singular IP addresses since such a range would comprise of x (large number of) IP addresses.

Is there a basic formula to help me highlight this?

© Programmers or respective owner

Related posts about networking

Networking stopped working on Ubuntu

as seen on Super User - Search for 'Super User'
I installed Ubuntu 10.04 through the Wubi installer (Funny, I installed it today and thought I would have gotten 10.10). I had a network connection and everything was working fine. I rebooted my coumputer a couple of times and then suddenly, I could not connect to the network and when I click the… >>> More
Troubles with start up defenition of networking service in Ubuntu

as seen on Super User - Search for 'Super User'
I use Ubuntu 12.04.1. I put attention that networking script starting in runlevel 0: user@comp:/etc/rc0.d$ chkconfig -l networking networking 0:on 1:off 2:off 3:off 4:off 5:off 6:off When I try to move it working to appropriate run levels I get error: user@comp:/etc/rc0… >>> More
Installing the Elgg Social Networking CMS

as seen on Internet.com - Search for 'Internet.com'
One Open Source CMS that stands out above the rest for small businesses and personal networks is the Elgg open source "social engine," which can be used to create social applications. Scott Clark shows you how to install and get started with this social networking CMS. >>> More
OAuth: Token-Based Authorization for the Social Networking Age

as seen on Internet.com - Search for 'Internet.com'
The OAuth token-based authorization system allows users to grant third-party access to their resources without sharing their usernames and passwords. It's perfect for the age of data scattered across many social networking sites. >>> More
OAuth: Token-Based Authorization for the Social Networking Age

as seen on Internet.com - Search for 'Internet.com'
The OAuth token-based authorization system allows users to grant third-party access to their resources without sharing their usernames and passwords. It's perfect for the age of data scattered across many social networking sites. >>> More

Related posts about networks

Basic Market Forecasting with Encog Neural Networks

as seen on Internet.com - Search for 'Internet.com'
Encog is an open source neural network framework released under the Lesser GNU Public License. >>> More
Secure Networks Require Secure Web Gateways

as seen on Internet.com - Search for 'Internet.com'
Most IT shops have handled the e-mail threat but overlook the rise of the Web as today's primary attack vector. Secure Web gateways that know better than to trust "good" sites will be key to addressing that oversight. >>> More
7 Simple Security Tips for Wireless Networks

as seen on Internet.com - Search for 'Internet.com'
Follow these seven wireless security tips to keep your home or small business Wi-Fi network secure. >>> More
WildPackets Monitors Diverse Networks

as seen on Internet.com - Search for 'Internet.com'
WildPackets offers portable network analysis products which are designed for use on enterprise networks and in test and measurement labs, plus distributed network analysis solutions for enterprise-wide applications. >>> More
Will the Super Bowl Sack Small Business Networks?

as seen on Internet.com - Search for 'Internet.com'
Monday morning quarterbacking will likely take the form of big network traffic spikes as employees (and yes, owners too) jump on social networks to either celebrate or mourn. You need to know the risks. >>> More