ip
ipku.in

IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

$ ipcalc
Try:192.168.1.10/2410.0.0.0/8172.16.5.4/20203.0.113.9/29
IPv6 calculator →
private IP (RFC 1918)10.3.42.0/23
network10.3.42.0/23
broadcast10.3.43.255
first host10.3.42.1
last host10.3.43.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.3.42.0/23
address00001010.00000011.00101010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000011.00101010.00000000
broadcast00001010.00000011.00101011.11111111
green = network part, grey = host part
hex0x0a032a00
decimal167979520
reverse dns0.42.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:2a00

/23 split into /32 · 512 subnets

close ×
#networkhost rangebroadcast
110.3.42.0/3210.3.42.0 – 10.3.42.010.3.42.0
210.3.42.1/3210.3.42.1 – 10.3.42.110.3.42.1
310.3.42.2/3210.3.42.2 – 10.3.42.210.3.42.2
410.3.42.3/3210.3.42.3 – 10.3.42.310.3.42.3
510.3.42.4/3210.3.42.4 – 10.3.42.410.3.42.4
610.3.42.5/3210.3.42.5 – 10.3.42.510.3.42.5
710.3.42.6/3210.3.42.6 – 10.3.42.610.3.42.6
810.3.42.7/3210.3.42.7 – 10.3.42.710.3.42.7
910.3.42.8/3210.3.42.8 – 10.3.42.810.3.42.8
1010.3.42.9/3210.3.42.9 – 10.3.42.910.3.42.9
1110.3.42.10/3210.3.42.10 – 10.3.42.1010.3.42.10
1210.3.42.11/3210.3.42.11 – 10.3.42.1110.3.42.11
1310.3.42.12/3210.3.42.12 – 10.3.42.1210.3.42.12
1410.3.42.13/3210.3.42.13 – 10.3.42.1310.3.42.13
1510.3.42.14/3210.3.42.14 – 10.3.42.1410.3.42.14
1610.3.42.15/3210.3.42.15 – 10.3.42.1510.3.42.15
1710.3.42.16/3210.3.42.16 – 10.3.42.1610.3.42.16
1810.3.42.17/3210.3.42.17 – 10.3.42.1710.3.42.17
1910.3.42.18/3210.3.42.18 – 10.3.42.1810.3.42.18
2010.3.42.19/3210.3.42.19 – 10.3.42.1910.3.42.19
2110.3.42.20/3210.3.42.20 – 10.3.42.2010.3.42.20
2210.3.42.21/3210.3.42.21 – 10.3.42.2110.3.42.21
2310.3.42.22/3210.3.42.22 – 10.3.42.2210.3.42.22
2410.3.42.23/3210.3.42.23 – 10.3.42.2310.3.42.23
2510.3.42.24/3210.3.42.24 – 10.3.42.2410.3.42.24
2610.3.42.25/3210.3.42.25 – 10.3.42.2510.3.42.25
2710.3.42.26/3210.3.42.26 – 10.3.42.2610.3.42.26
2810.3.42.27/3210.3.42.27 – 10.3.42.2710.3.42.27
2910.3.42.28/3210.3.42.28 – 10.3.42.2810.3.42.28
3010.3.42.29/3210.3.42.29 – 10.3.42.2910.3.42.29
3110.3.42.30/3210.3.42.30 – 10.3.42.3010.3.42.30
3210.3.42.31/3210.3.42.31 – 10.3.42.3110.3.42.31
3310.3.42.32/3210.3.42.32 – 10.3.42.3210.3.42.32
3410.3.42.33/3210.3.42.33 – 10.3.42.3310.3.42.33
3510.3.42.34/3210.3.42.34 – 10.3.42.3410.3.42.34
3610.3.42.35/3210.3.42.35 – 10.3.42.3510.3.42.35
3710.3.42.36/3210.3.42.36 – 10.3.42.3610.3.42.36
3810.3.42.37/3210.3.42.37 – 10.3.42.3710.3.42.37
3910.3.42.38/3210.3.42.38 – 10.3.42.3810.3.42.38
4010.3.42.39/3210.3.42.39 – 10.3.42.3910.3.42.39
4110.3.42.40/3210.3.42.40 – 10.3.42.4010.3.42.40
4210.3.42.41/3210.3.42.41 – 10.3.42.4110.3.42.41
4310.3.42.42/3210.3.42.42 – 10.3.42.4210.3.42.42
4410.3.42.43/3210.3.42.43 – 10.3.42.4310.3.42.43
4510.3.42.44/3210.3.42.44 – 10.3.42.4410.3.42.44
4610.3.42.45/3210.3.42.45 – 10.3.42.4510.3.42.45
4710.3.42.46/3210.3.42.46 – 10.3.42.4610.3.42.46
4810.3.42.47/3210.3.42.47 – 10.3.42.4710.3.42.47
4910.3.42.48/3210.3.42.48 – 10.3.42.4810.3.42.48
5010.3.42.49/3210.3.42.49 – 10.3.42.4910.3.42.49
5110.3.42.50/3210.3.42.50 – 10.3.42.5010.3.42.50
5210.3.42.51/3210.3.42.51 – 10.3.42.5110.3.42.51
5310.3.42.52/3210.3.42.52 – 10.3.42.5210.3.42.52
5410.3.42.53/3210.3.42.53 – 10.3.42.5310.3.42.53
5510.3.42.54/3210.3.42.54 – 10.3.42.5410.3.42.54
5610.3.42.55/3210.3.42.55 – 10.3.42.5510.3.42.55
5710.3.42.56/3210.3.42.56 – 10.3.42.5610.3.42.56
5810.3.42.57/3210.3.42.57 – 10.3.42.5710.3.42.57
5910.3.42.58/3210.3.42.58 – 10.3.42.5810.3.42.58
6010.3.42.59/3210.3.42.59 – 10.3.42.5910.3.42.59
6110.3.42.60/3210.3.42.60 – 10.3.42.6010.3.42.60
6210.3.42.61/3210.3.42.61 – 10.3.42.6110.3.42.61
6310.3.42.62/3210.3.42.62 – 10.3.42.6210.3.42.62
6410.3.42.63/3210.3.42.63 – 10.3.42.6310.3.42.63
6510.3.42.64/3210.3.42.64 – 10.3.42.6410.3.42.64
6610.3.42.65/3210.3.42.65 – 10.3.42.6510.3.42.65
6710.3.42.66/3210.3.42.66 – 10.3.42.6610.3.42.66
6810.3.42.67/3210.3.42.67 – 10.3.42.6710.3.42.67
6910.3.42.68/3210.3.42.68 – 10.3.42.6810.3.42.68
7010.3.42.69/3210.3.42.69 – 10.3.42.6910.3.42.69
7110.3.42.70/3210.3.42.70 – 10.3.42.7010.3.42.70
7210.3.42.71/3210.3.42.71 – 10.3.42.7110.3.42.71
7310.3.42.72/3210.3.42.72 – 10.3.42.7210.3.42.72
7410.3.42.73/3210.3.42.73 – 10.3.42.7310.3.42.73
7510.3.42.74/3210.3.42.74 – 10.3.42.7410.3.42.74
7610.3.42.75/3210.3.42.75 – 10.3.42.7510.3.42.75
7710.3.42.76/3210.3.42.76 – 10.3.42.7610.3.42.76
7810.3.42.77/3210.3.42.77 – 10.3.42.7710.3.42.77
7910.3.42.78/3210.3.42.78 – 10.3.42.7810.3.42.78
8010.3.42.79/3210.3.42.79 – 10.3.42.7910.3.42.79
8110.3.42.80/3210.3.42.80 – 10.3.42.8010.3.42.80
8210.3.42.81/3210.3.42.81 – 10.3.42.8110.3.42.81
8310.3.42.82/3210.3.42.82 – 10.3.42.8210.3.42.82
8410.3.42.83/3210.3.42.83 – 10.3.42.8310.3.42.83
8510.3.42.84/3210.3.42.84 – 10.3.42.8410.3.42.84
8610.3.42.85/3210.3.42.85 – 10.3.42.8510.3.42.85
8710.3.42.86/3210.3.42.86 – 10.3.42.8610.3.42.86
8810.3.42.87/3210.3.42.87 – 10.3.42.8710.3.42.87
8910.3.42.88/3210.3.42.88 – 10.3.42.8810.3.42.88
9010.3.42.89/3210.3.42.89 – 10.3.42.8910.3.42.89
9110.3.42.90/3210.3.42.90 – 10.3.42.9010.3.42.90
9210.3.42.91/3210.3.42.91 – 10.3.42.9110.3.42.91
9310.3.42.92/3210.3.42.92 – 10.3.42.9210.3.42.92
9410.3.42.93/3210.3.42.93 – 10.3.42.9310.3.42.93
9510.3.42.94/3210.3.42.94 – 10.3.42.9410.3.42.94
9610.3.42.95/3210.3.42.95 – 10.3.42.9510.3.42.95
9710.3.42.96/3210.3.42.96 – 10.3.42.9610.3.42.96
9810.3.42.97/3210.3.42.97 – 10.3.42.9710.3.42.97
9910.3.42.98/3210.3.42.98 – 10.3.42.9810.3.42.98
10010.3.42.99/3210.3.42.99 – 10.3.42.9910.3.42.99
10110.3.42.100/3210.3.42.100 – 10.3.42.10010.3.42.100
10210.3.42.101/3210.3.42.101 – 10.3.42.10110.3.42.101
10310.3.42.102/3210.3.42.102 – 10.3.42.10210.3.42.102
10410.3.42.103/3210.3.42.103 – 10.3.42.10310.3.42.103
10510.3.42.104/3210.3.42.104 – 10.3.42.10410.3.42.104
10610.3.42.105/3210.3.42.105 – 10.3.42.10510.3.42.105
10710.3.42.106/3210.3.42.106 – 10.3.42.10610.3.42.106
10810.3.42.107/3210.3.42.107 – 10.3.42.10710.3.42.107
10910.3.42.108/3210.3.42.108 – 10.3.42.10810.3.42.108
11010.3.42.109/3210.3.42.109 – 10.3.42.10910.3.42.109
11110.3.42.110/3210.3.42.110 – 10.3.42.11010.3.42.110
11210.3.42.111/3210.3.42.111 – 10.3.42.11110.3.42.111
11310.3.42.112/3210.3.42.112 – 10.3.42.11210.3.42.112
11410.3.42.113/3210.3.42.113 – 10.3.42.11310.3.42.113
11510.3.42.114/3210.3.42.114 – 10.3.42.11410.3.42.114
11610.3.42.115/3210.3.42.115 – 10.3.42.11510.3.42.115
11710.3.42.116/3210.3.42.116 – 10.3.42.11610.3.42.116
11810.3.42.117/3210.3.42.117 – 10.3.42.11710.3.42.117
11910.3.42.118/3210.3.42.118 – 10.3.42.11810.3.42.118
12010.3.42.119/3210.3.42.119 – 10.3.42.11910.3.42.119
12110.3.42.120/3210.3.42.120 – 10.3.42.12010.3.42.120
12210.3.42.121/3210.3.42.121 – 10.3.42.12110.3.42.121
12310.3.42.122/3210.3.42.122 – 10.3.42.12210.3.42.122
12410.3.42.123/3210.3.42.123 – 10.3.42.12310.3.42.123
12510.3.42.124/3210.3.42.124 – 10.3.42.12410.3.42.124
12610.3.42.125/3210.3.42.125 – 10.3.42.12510.3.42.125
12710.3.42.126/3210.3.42.126 – 10.3.42.12610.3.42.126
12810.3.42.127/3210.3.42.127 – 10.3.42.12710.3.42.127
12910.3.42.128/3210.3.42.128 – 10.3.42.12810.3.42.128
13010.3.42.129/3210.3.42.129 – 10.3.42.12910.3.42.129
13110.3.42.130/3210.3.42.130 – 10.3.42.13010.3.42.130
13210.3.42.131/3210.3.42.131 – 10.3.42.13110.3.42.131
13310.3.42.132/3210.3.42.132 – 10.3.42.13210.3.42.132
13410.3.42.133/3210.3.42.133 – 10.3.42.13310.3.42.133
13510.3.42.134/3210.3.42.134 – 10.3.42.13410.3.42.134
13610.3.42.135/3210.3.42.135 – 10.3.42.13510.3.42.135
13710.3.42.136/3210.3.42.136 – 10.3.42.13610.3.42.136
13810.3.42.137/3210.3.42.137 – 10.3.42.13710.3.42.137
13910.3.42.138/3210.3.42.138 – 10.3.42.13810.3.42.138
14010.3.42.139/3210.3.42.139 – 10.3.42.13910.3.42.139
14110.3.42.140/3210.3.42.140 – 10.3.42.14010.3.42.140
14210.3.42.141/3210.3.42.141 – 10.3.42.14110.3.42.141
14310.3.42.142/3210.3.42.142 – 10.3.42.14210.3.42.142
14410.3.42.143/3210.3.42.143 – 10.3.42.14310.3.42.143
14510.3.42.144/3210.3.42.144 – 10.3.42.14410.3.42.144
14610.3.42.145/3210.3.42.145 – 10.3.42.14510.3.42.145
14710.3.42.146/3210.3.42.146 – 10.3.42.14610.3.42.146
14810.3.42.147/3210.3.42.147 – 10.3.42.14710.3.42.147
14910.3.42.148/3210.3.42.148 – 10.3.42.14810.3.42.148
15010.3.42.149/3210.3.42.149 – 10.3.42.14910.3.42.149
15110.3.42.150/3210.3.42.150 – 10.3.42.15010.3.42.150
15210.3.42.151/3210.3.42.151 – 10.3.42.15110.3.42.151
15310.3.42.152/3210.3.42.152 – 10.3.42.15210.3.42.152
15410.3.42.153/3210.3.42.153 – 10.3.42.15310.3.42.153
15510.3.42.154/3210.3.42.154 – 10.3.42.15410.3.42.154
15610.3.42.155/3210.3.42.155 – 10.3.42.15510.3.42.155
15710.3.42.156/3210.3.42.156 – 10.3.42.15610.3.42.156
15810.3.42.157/3210.3.42.157 – 10.3.42.15710.3.42.157
15910.3.42.158/3210.3.42.158 – 10.3.42.15810.3.42.158
16010.3.42.159/3210.3.42.159 – 10.3.42.15910.3.42.159
16110.3.42.160/3210.3.42.160 – 10.3.42.16010.3.42.160
16210.3.42.161/3210.3.42.161 – 10.3.42.16110.3.42.161
16310.3.42.162/3210.3.42.162 – 10.3.42.16210.3.42.162
16410.3.42.163/3210.3.42.163 – 10.3.42.16310.3.42.163
16510.3.42.164/3210.3.42.164 – 10.3.42.16410.3.42.164
16610.3.42.165/3210.3.42.165 – 10.3.42.16510.3.42.165
16710.3.42.166/3210.3.42.166 – 10.3.42.16610.3.42.166
16810.3.42.167/3210.3.42.167 – 10.3.42.16710.3.42.167
16910.3.42.168/3210.3.42.168 – 10.3.42.16810.3.42.168
17010.3.42.169/3210.3.42.169 – 10.3.42.16910.3.42.169
17110.3.42.170/3210.3.42.170 – 10.3.42.17010.3.42.170
17210.3.42.171/3210.3.42.171 – 10.3.42.17110.3.42.171
17310.3.42.172/3210.3.42.172 – 10.3.42.17210.3.42.172
17410.3.42.173/3210.3.42.173 – 10.3.42.17310.3.42.173
17510.3.42.174/3210.3.42.174 – 10.3.42.17410.3.42.174
17610.3.42.175/3210.3.42.175 – 10.3.42.17510.3.42.175
17710.3.42.176/3210.3.42.176 – 10.3.42.17610.3.42.176
17810.3.42.177/3210.3.42.177 – 10.3.42.17710.3.42.177
17910.3.42.178/3210.3.42.178 – 10.3.42.17810.3.42.178
18010.3.42.179/3210.3.42.179 – 10.3.42.17910.3.42.179
18110.3.42.180/3210.3.42.180 – 10.3.42.18010.3.42.180
18210.3.42.181/3210.3.42.181 – 10.3.42.18110.3.42.181
18310.3.42.182/3210.3.42.182 – 10.3.42.18210.3.42.182
18410.3.42.183/3210.3.42.183 – 10.3.42.18310.3.42.183
18510.3.42.184/3210.3.42.184 – 10.3.42.18410.3.42.184
18610.3.42.185/3210.3.42.185 – 10.3.42.18510.3.42.185
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19010.3.42.189/3210.3.42.189 – 10.3.42.18910.3.42.189
19110.3.42.190/3210.3.42.190 – 10.3.42.19010.3.42.190
19210.3.42.191/3210.3.42.191 – 10.3.42.19110.3.42.191
19310.3.42.192/3210.3.42.192 – 10.3.42.19210.3.42.192
19410.3.42.193/3210.3.42.193 – 10.3.42.19310.3.42.193
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20210.3.42.201/3210.3.42.201 – 10.3.42.20110.3.42.201
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21410.3.42.213/3210.3.42.213 – 10.3.42.21310.3.42.213
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21610.3.42.215/3210.3.42.215 – 10.3.42.21510.3.42.215
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21910.3.42.218/3210.3.42.218 – 10.3.42.21810.3.42.218
22010.3.42.219/3210.3.42.219 – 10.3.42.21910.3.42.219
22110.3.42.220/3210.3.42.220 – 10.3.42.22010.3.42.220
22210.3.42.221/3210.3.42.221 – 10.3.42.22110.3.42.221
22310.3.42.222/3210.3.42.222 – 10.3.42.22210.3.42.222
22410.3.42.223/3210.3.42.223 – 10.3.42.22310.3.42.223
22510.3.42.224/3210.3.42.224 – 10.3.42.22410.3.42.224
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22910.3.42.228/3210.3.42.228 – 10.3.42.22810.3.42.228
23010.3.42.229/3210.3.42.229 – 10.3.42.22910.3.42.229
23110.3.42.230/3210.3.42.230 – 10.3.42.23010.3.42.230
23210.3.42.231/3210.3.42.231 – 10.3.42.23110.3.42.231
23310.3.42.232/3210.3.42.232 – 10.3.42.23210.3.42.232
23410.3.42.233/3210.3.42.233 – 10.3.42.23310.3.42.233
23510.3.42.234/3210.3.42.234 – 10.3.42.23410.3.42.234
23610.3.42.235/3210.3.42.235 – 10.3.42.23510.3.42.235
23710.3.42.236/3210.3.42.236 – 10.3.42.23610.3.42.236
23810.3.42.237/3210.3.42.237 – 10.3.42.23710.3.42.237
23910.3.42.238/3210.3.42.238 – 10.3.42.23810.3.42.238
24010.3.42.239/3210.3.42.239 – 10.3.42.23910.3.42.239
24110.3.42.240/3210.3.42.240 – 10.3.42.24010.3.42.240
24210.3.42.241/3210.3.42.241 – 10.3.42.24110.3.42.241
24310.3.42.242/3210.3.42.242 – 10.3.42.24210.3.42.242
24410.3.42.243/3210.3.42.243 – 10.3.42.24310.3.42.243
24510.3.42.244/3210.3.42.244 – 10.3.42.24410.3.42.244
24610.3.42.245/3210.3.42.245 – 10.3.42.24510.3.42.245
24710.3.42.246/3210.3.42.246 – 10.3.42.24610.3.42.246
24810.3.42.247/3210.3.42.247 – 10.3.42.24710.3.42.247
24910.3.42.248/3210.3.42.248 – 10.3.42.24810.3.42.248
25010.3.42.249/3210.3.42.249 – 10.3.42.24910.3.42.249
25110.3.42.250/3210.3.42.250 – 10.3.42.25010.3.42.250
25210.3.42.251/3210.3.42.251 – 10.3.42.25110.3.42.251
25310.3.42.252/3210.3.42.252 – 10.3.42.25210.3.42.252
25410.3.42.253/3210.3.42.253 – 10.3.42.25310.3.42.253
25510.3.42.254/3210.3.42.254 – 10.3.42.25410.3.42.254
25610.3.42.255/3210.3.42.255 – 10.3.42.25510.3.42.255

showing 256 of 512

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /23
/00.0.0.04,294,967,2964,294,967,294-
/1128.0.0.02,147,483,6482,147,483,646-
/2192.0.0.01,073,741,8241,073,741,822-
/3224.0.0.0536,870,912536,870,910-
/4240.0.0.0268,435,456268,435,454-
/5248.0.0.0134,217,728134,217,726-
/6252.0.0.067,108,86467,108,862-
/7254.0.0.033,554,43233,554,430-
/8255.0.0.016,777,21616,777,214-
/9255.128.0.08,388,6088,388,606-
/10255.192.0.04,194,3044,194,302-
/11255.224.0.02,097,1522,097,150-
/12255.240.0.01,048,5761,048,574-
/13255.248.0.0524,288524,286-
/14255.252.0.0262,144262,142-
/15255.254.0.0131,072131,070-
/16255.255.0.065,53665,534-
/17255.255.128.032,76832,766-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,190-
/20255.255.240.04,0964,094-
/21255.255.248.02,0482,046-
/22255.255.252.01,0241,022-
/23255.255.254.05125101
/24255.255.255.02562542 split →
/25255.255.255.1281281264 split →
/26255.255.255.19264628 split →
/27255.255.255.224323016 split →
/28255.255.255.240161432 split →
/29255.255.255.2488664 split →
/30255.255.255.25242128 split →
/31255.255.255.25422256 split →
/32255.255.255.25511512 split →
02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →