IPv4 Subnetting Table
CIDR | SUBNET MASK | # of IPs |
---|---|---|
/32 | 255.255.255.255 | 1 |
/31 | 255.255.255.254 | 2 |
/30 | 255.255.255.252 | 4 |
/29 | 255.255.255.248 | 8 |
/28 | 255.255.255.240 | 16 |
/27 | 255.255.255.224 | 32 |
/26 | 255.255.255.192 | 64 |
/25 | 255.255.255.128 | 128 |
/24 | 255.255.255.0 | 256 |
/23 | 255.255.254.0 | 512 |
/22 | 255.255.252.0 | 1024 |
/21 | 255.255.248.0 | 2048 |
/20 | 255.255.240.0 | 4096 |
/19 | 255.255.224.0 | 8192 |
/18 | 255.255.192.0 | 16384 |
/17 | 255.255.128.0 | 32768 |
/16 | 255.255.0.0 | 65536 |
Sample IPv4 Config for Multi Environment Project AWS VPC
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DEV
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VPC : 10.110.0.0/16
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Public Subnet One [AZ1] : 10.110.1.0/24
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Public Submet Two [AZ2] : 10.110.3.0/24
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Public Submet Tree [AZ3] : 10.110.5.0/24
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Private Subnet One [AZ1] : 10.110.8.0/22
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Private Subnet Two [AZ2] : 10.110.12.0/22
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Private Subnet Tree [AZ3 ]: 10.110.16.0/22
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TEST
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VPC : 10.120.0.0/16
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Public Subnet One [AZ1] : 10.120.1.0/24
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Public Submet Two [AZ2] : 10.120.3.0/24
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Public Submet Tree [AZ3] : 10.120.5.0/24
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Private Subnet One [AZ1] : 10.120.8.0/22
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Private Subnet Two [AZ2] : 10.120.12.0/22
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Private Subnet Tree [AZ3 ]: 10.120.16.0/22
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PROD
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VPC : 10.150.0.0/16
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Public Subnet One [AZ1] : 10.150.1.0/24
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Public Submet Two [AZ2] : 10.150.3.0/24
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Public Submet Tree [AZ3] : 10.150.5.0/24
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Private Subnet One [AZ1] : 10.150.8.0/22
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Private Subnet Two [AZ2] : 10.150.12.0/22
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Private Subnet Tree [AZ3 ]: 10.150.16.0/22
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