how can i change my ip in cable modem ?

Is your ip Static or Dynamic. If your ip is static then you cannot change your ip address. Otherwise your ip address is dynamic,you can change your ip address by resetting your modem. After your ip was change you can check your ip address at http://www.ip-details.com/ here they display Internet service provider,IP address, location, Longitude,latitude and so on...

sahana
September 2013

2 types of IP addresses:
1) Static. this is a never changing IP assigned by your ISP only to you. I would be very suprised if you have a static IP. the only way to change it is to call your ISP and ask them to change it.

2) Dynamic. This means that you are randomly assigned an ip by your ISP each time you log on. To change this(assuming you are using windows xp), open up your control panel, go to network connections, Right click on your local area connection and choose "repair" this will release your old IP and grab a new one. You may or may not have the same one reassigned.

Jim R
June 2008