从给定的子网地址和掩码中查找IPv4范围？ [关闭]

Question

I have subnet address and mask, and I am looking for possible IP range in that subnet. Please let me know a solution in Python, PHP, or Java.

For example, I have the following details:

Subnet address: 10.113.12.40

mask: 255.255.255.248

Then what will be the IP Range?

Answer 1

 10.113. 12. 40 -> 00001010.01110001.00001100.00101000
255.255.255.248 -> 11111111.11111111.11111111.11111000
                                                   ^^^--- 3 bits for your network

2**3 = 8, so you've got 8 IPs in your network, giving you a range of 10.113.12.40 -> 10.113.12.47

Basically a netmask defines what's "inside" and "outside" your network. Normal bitmask has 1 for outside, and 0 for inside. So a quicker version would be:

10.113.12.40 NOR 255.255.255.248 = 10.113.12.47
               ^^^^^^^^^^^^^^^---invert the mask and OR it with the network address.