IPv4 Subnet Mask Cheat Sheet

by
 AddressesHostsNetmaskAmount of a Class C
/ 3042255.255.255.2521 / 64
/ 2986255.255.255.2481 / 32
/ 281614255.255.255.2401 / 16
/ 273230255.255.255.2241 / 8
/ 266462255.255.255.1921 / 4
/ 25128126255.255.255.1281 / 2
/ 24256254255.255.255.01
/ 23512510255.255.254.02
/ 2210241022255.255.252.04
/ 2120482046255.255.248.08
/ 2040964094255.255.240.016
/ 1981928190255.255.224.032
/ 181638416382255.255.192.064
/ 173276832766255.255.128.0128
/ 166553665534255.255.0.0256

GUIDE TO SUB-CLASS C BLOCKS

/25 — 2 Subnets — 126 Hosts / Subnet

Network #IP RangeBroadcast
.0.1 – .126.127
.128.129 – .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

Leave a Comment