Which CIDR Blocks Are Available for the VPC Service?¶
The following table lists the private CIDR blocks that you can specify when creating a VPC. Consider the following when selecting a VPC CIDR block:
Number of IP addresses: Reserve sufficient IP addresses in case of business growth.
IP address range: Avoid IP address conflicts if you need to connect a VPC to an on-premises data center or connect two VPCs.
Table 1 lists the supported VPC CIDR blocks.
VPC CIDR Block | IP Address Range | Maximum Number of IP Addresses |
---|---|---|
10.0.0.0/8-24 | 10.0.0.0-10.255.255.255 | 2^24-2=16777214 |
172.16.0.0/12-24 | 172.16.0.0-172.31.255.255 | 2^20-2=1048574 |
192.168.0.0/16-24 | 192.168.0.0-192.168.255.255 | 2^16-2=65534 |