Problem Router with two subnet

[Zubeen]

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hi,
I'm not sure I understand that 10 subnet is not private ip,All ten of the hosts are connected to router. but if i configure host with another subnet 255.2555.255.0, Is there something different in how the private addresses are subnetted compared to Classful A,B,C addresses are subnetted?
Any recommendations and suggestions are appreciated.

[Zachary]

ISP may not be a total idiot for "assigning" this IP space in the first place. It would only work on your 10/24 or 10/8 network and possibly to reach the ISP's.servers / routers and that is likely it.

[Shen]

You can recognise a Class A address because the first octet is a number from 1 to 126 inclusive. So any of the below IP addresses are class A.

10.1.2.4

120.2.3.5

125.1.2.3

Network devices recognise a Class A address as such because the numbers are checked in binary and the first number in the first octet always begins with the number 0. Class A addresses lock the first octet for network numbers. The remaining three octets can be used for host numbers.

[Spyrus]

Each IP address is usually represented in decimal form, However, each IP address is actually used by computers in binary form. You may have noticed a huge flaw in IP version 4: the amount of unique IP addresses is limited! To be exact, only 4,294,967,296 unique IP addresses can be created. This may seem like a large number but keep in mind every single device in the world needs a unique IP address to communicate with one another while online.