If I have taken IPv4 CIDR block as 10 10 0 0 16 then how many IP addresses should be available

Question

I set up an AWS VPC with the IPv4 CIDR block 10.10.0.0/16.
According to my understanding, the usable IP address range should be 10.10.0.0 to 10.10.255.255. In other words, it should have a total of 216 = 65536 IP addresses. Is this correct?

Answer 1

The formula for calculating the amount of IP addresses that can be assigned to CIDR networks is related to classful networking. Take the number of network bits and divide it by 32. Raise that number by two and remove two for the network and broadcast addresses.

I recommend that when you construct a VPC, you provide a CIDR block from the private IPv4 address ranges described in RFC 1918.