re: How can I change my IP address?

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Now I have cable internet. Is cable different from DSL as far as how easy it is to get a new IP?

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Every ISP has their own policies. Back when I worked at one to force a new IP a tech would have to power off the modem and request an arp cache clear of the router that served that node so the modem would get a new IP. If you leave it off long enough it'll eventually get a new one. But who knows how long it takes

Clear the arp on the router at the isp's head end. Not the router in the home

MACs are hard coded into a device. You can't 'drop' a MAC address. Your device will pull some IP address from your ISP, and your ISPs DHCP server will keep a binding that ties that IP address to your router's MAC address. The DHCP server "leases" you an IP. In order for you to grab a new IP, your ISP has to somehow clear that DHCP lease from the DHCP server table. That happens automatically after some duration of time if your device doesn't send requests at the required intervals, but each ISP has a different policy on how long a lease lasts. They may also clear it out for you manually if you ask, but it's doubtful. Most of the time, the DHCP lease times are under 24 hours, education usually means you can get a new IP by leaving your router unplugged for 24 hours. You can also get a new router and get a new IP.

MAC sticky is a feature in network switches where the port will learn your MAC address and then only allow traffic from that MAC address. It's not commonly used in ISP networks due to customer turnover and because field techs need to be able to troubleshoot by plugging in. MAC sticky is usually only used in highly secure environments.

Bunch of people in here have no idea how ISPs work giving answers

If it's cable, you likely have a DHCP address reserved, you will need to call comcast and ask, making a story up, which is a longshot. A new modem would probably work too.

Another option is calling comcast and asking for a static IP. Static IPs will be in a different range and they will give you a new one, but it might cost you.

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Back when I had DSL, it used to be as easy as unplugging my modem for a little while and bam

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PPPoE, baw

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As far as I am aware, myself and Hulk are the only 2 in here who work / have worked for an ISP.

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Working for an ISP doesn't mean you're the only ones who understand internal/external IP ranges..

I promise you a new modem should work. Like I said my IP changed. I have cameras and had to reprogram my app with the new IP.