New Subnet / IP address range

It depends what other equipment you have and if you are able to configure routing between the subnets.

For simplicity you may just simply want to change the subnet to 255.255.0.0 which will increase the numbers and allow you to continue to use your existing addresses.

that should help

http://www.windowsitpro.com/article/john-savills-windows-faqs/how-do-i-create-a-new-active-directory-site-.aspx

I agree w/ demazter, but still it's a manual job that you would have to do it on all the static ip machine and change the setting in the router.  Which bring up another issue whether your router will suppose /16 network.  Some cheap router w/ manufacturer firmware won't support it.

you don't have to do it manually there are ways of changing it remotely.  You can use somethin like PSEXEC: https://www.experts-exchange.com/Networking/Network_Management/A_2779-Use-PSExec-to-run-a-command-remotely.html

@demazter your comments are noted but all the links i posted worked fine with me.

Okay,

I have added the IP address range as advised but used the same subnet. What do i do with the default gateway and DNS servers.
subnet.jpg

Please close this question, None of the answer were correct, The simple answer was to extend the DHCP range.

192.168.0.1 192.168.4.254.

No point sfor anyone.

That DHCP range will not work without adjusting the subnet as I already stated.

Anything with a 192.168.1.x will not be able to communicate with 192.168.4x with a 255.255.255.0 subnet unless you have routing between te Subnets in place.

someone0, I am assuming your comment was aimed at me?

The fact the author mentions Subnets and DHCP in the same question is pretty offputting.

Especially since AD Subnets actually have no relation to DHCP scopes.

I am fully aware of the way in which networks work and what subnets are for.

Unless there is appropriate routing in place then there is not going to be any communication beween different subnets.