IPv4 Subnet Mask Cheat Sheet

by
PrefixIP AddressesSubnet MaskBits
/321255.255.255.2550
/312255.255.255.2541
/304255.255.255.2522
/298255.255.255.2483
/2816255.255.255.2404
/2732255.255.255.2245
/2664255.255.255.1926
/25128255.255.255.1287
/24256255.255.255.08
/23512255.255.254.09
/221,024255.255.252.010
/212,048255.255.248.011
/204,048255.255.240.012
/198,192255.255.224.013
/1816,384255.255.192.014
/1732,768255.255.128.015
/1665,536255.255.0.016
/15131,072255.254.0.017
/14262,144255.252.0.018
/13524,288255.248.0.019
/121,048,576255.240.0.020
/112,097,152255.224.0.021
/104,194,304255.192.0.022
/98,388,608255.128.0.023
/816,777,216255.0.0.024
/733,554,432254.0.0.025
/667,108,864252.0.0.026
/5134,217,728248.0.0.027
/4268,435,456240.0.0.028
/3536,870,912224.0.0.029
/21,073,741,824192.0.0.030
/12,147,483,648128.0.0.031
/04,294,967,2960.0.0.032

Guide to IPv4 Subnets

/25 – 2 Subnets – 126 Hosts/Subnet

Network #IP RangeBroadcast
.0.1-.126.127
.128.126-.254.255

/26 – 4 Subnets – 62 Hosts/Subnet

Network #IP RangeBroadcast
.0.1-.62.63
.64.65-.126.127
.128.129-.190.191
.192.193-.254.255

/27 – 8 Subnets – 30 Hosts/Subnet

Network #IP RangeBroadcast
.0.1-.30.31
.32.33-.62.63
.64.65-.94.95
.96.97-.126.127
.128.129-.158.159
.160.161-.190.191
.192.193-.222.223
.224.225-.254.255

/28 – 16 Subnets – 14 Hosts/Subnet

Network #IP RangeBroadcast
.0.1-.14.15
.16.17-.30.31
.32.33-.46.47
.48.49-.62.63
.64.65-.78.79
.80.81-.94.95
.96.97-.110.111
.112.113-.126.127
.128.129-.142.143
.144.145-.158.159
.160.161-.174.175
.176.177-.190.191
.192.193-.206.207
.208.209-.222.223
.224.225-.238.239
.240.241-.254.255

/29 – 32 Subnets – 6 Hosts/Subnet

Network #IP RangeBroadcast
.0.1-.6.7
.8.9-.14.15
.16.17-.22.23
.24.25-.30.31
.32.33-.38.39
.40.41-.46.47
.48.49-.54.55
.56.57-.62.63
.64.65-.70.71
.72.73-.78.79
.80.81-.86.87
.88.89-.94.95
.96.97-.102.103
.104.105-.110.111
.112.113-.118.119
.120.121-.126.127
.128.129-.134.135
.136.137-.142.143
.144.145-.150.151
.152.153-.158.159
.160.161-.166.167
.168.169-.174.175
.176.177-.182.183
.184.185-.190.191
.192.193-.198.199
.200.201-.206.207
.208.209-.214.215
.216.217-.222.223
.224.225-.230.231
.232.233-.238.239
.240.241-.246.247
.248.249-.254.255

/30 – 64 Subnets – 2 Hosts/Subnet

Network #IP RangeBroadcast
.0.1-.2.3
.4.5-.6.7
.8.9-.10.11
.12.13-.14.15
.16.17-.18.19
.20.21-.22.23
.24.25-.26.27
.28.29-.30.31
.32.33-.34.35
.36.37-.38.39
.40.41-.42.43
.44.45-.46.47
.48.49-.50.51
.52.53-.54.55
.56.57-.58.59
.60.61-.62.63
.64.65-.66.67
.68.69-.70.71
.72.73-.74.75
.76.77-.78.79
.80.81-.82.83
.84.85-.86.87
.88.89-.90.91
.92.93-.94.95
.96.97-.98.99
.100.101-.102.103
.104.105-.106.107
.108.109-.110.111
.112.113-.114.115
.116.117-.118.119
.120.121-.122.123
.124.125-.126.127
.128.129-.130.131
.132.133-.134.135
.136.137-.138.139
.140.141-.142.143
.144.145-.146.147
.148.149-.150.151
.152.153-.154.155
.156.157-.158.159
.160.161-.162.163
.164.165-.166.167
.168.169-.170.171
.172.173-.174.175
.176.177-.178.179
.180.181-.182.183
.184.185-.186.187
.188.189-.190.191
.192.193-.194.195
.196.197-.198.199
.200.201-.202.203
.204.205-.206.207
.208.209-.210.211
.212.213-.214.215
.216.217-.218.219
.220.221-.222.223
.224.225-.226.227
.228.229-.230.231
.232.233-.234.235
.236.237-.238.239
.240.241-.242.243
.244.245-.246.247
.248.249-.250.251
.252.253-.254.255

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