What’s my IP range?

15 pts.
Tags:
IP range
I am needing to find my IP range and find an avail IP within that range.

IP addy - 192.168.1.104

Subnet Mask - 255.255.255.0

Default Gateway- 192.168.1.1

Answer Wiki

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By using the subnet mask you can work out how many address are in a given range. For instance in a /24 (mask 255.255.255.0) you have the whole of the last octet to play with, well, apart from the first and last addresses which will always be your network address and broadcast respectively.

So for your example:

192.168.1.0 – Network Address
255.255.255.0 – Subnet Mask
192.168.1.255 – Broadcast Address
192.168.1.1 to 192.168.1.254 – Useable Addresses

Your default gateway is already .1 so really <b>you have .2 to .254 for use</b>.

I would suggest until you have learned sub-netting have a quick search on google and either use an online subnet calculator or download one of the many free ones. There is a great online one at: IP subnet calculator

-Mattmather

———–

are you using DHCP? If you are then you can see what are the IP’s that are not used yet

if not just ping the IP that you feel like using..

-Jinteik

Discuss This Question: 4  Replies

 
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  • Techrecruit
    Thank you - much appreciated
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  • carlosdl
    You could use ping or an ip-scanner to check for ip addresses being used in the network, but that wouldn't be a reliable method to find an availlable address, as a device that is turned off at the time of the scan would not respond to the ping requests, but that doesn't mean its address is available. When not using DHCP, additional controls need to be in place to determine ip-address availability.
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  • haridhna
    An IP address is an Internet Protocol address. It is used to identify all the websites on the internet. Ip ranges from 0-255.There are two types of ip address: 1. Private IP 2. Public Ip Private IP range : Class A(Netid.hostid.hostid.hostid) : 1.0.0.0 to 126.0.0.0 Class B(Netid.Netid.hostid.hostid) : 128.0.0.0 to 191.0.0.0 Class C(Netid.Netid.Netid.hostid) : 192.0.0.0 to 223.0.0.0 Class D(Multicast) : 224.0.0.0 to 239.0.0.0 Class E(For Research) : 240.0.0.0 to 255.0.0.0 Public ip address ranges from : Class A(Netid.hostid.hostid.hostid) : 1.0.0.0 to 126.0.0.0 Class B(Netid.Netid.hostid.hostid) : 128.0.0.0 to 191.0.0.0 Class C(Netid.Netid.Netid.hostid) : 192.0.0.0 to 223.0.0.0 Class D(Multicast) : 224.0.0.0 to 239.0.0.0 Class E(For Research) : 240.0.0.0 to 255.0.0.0 . Your ip starts from 192.x.x.x , it shows that your Ip is Class " c" . If you want to determine your public ip address visit http://www.ip-details.com/ .
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  • TomLiotta
    Note that the previous comment has numerous errors in the listed ranges. Also note that the link not only gives an incorrect result for my IP address, but it also gives an incorrect geographic location, missing by perhaps 1500 miles. I don't doubt that the site works correctly most of the time, but the number of errors makes it very questionable to me. -- Tom
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