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)10.0.71.0/24
network10.0.71.0/24
broadcast10.0.71.255
first host10.0.71.1
last host10.0.71.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.0.71.0/24
address00001010.00000000.01000111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000000.01000111.00000000
broadcast00001010.00000000.01000111.11111111
green = network part, grey = host part
hex0x0a004700
decimal167790336
reverse dns0.71.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:4700

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.71.0/3110.0.71.0 – 10.0.71.110.0.71.1
210.0.71.2/3110.0.71.2 – 10.0.71.310.0.71.3
310.0.71.4/3110.0.71.4 – 10.0.71.510.0.71.5
410.0.71.6/3110.0.71.6 – 10.0.71.710.0.71.7
510.0.71.8/3110.0.71.8 – 10.0.71.910.0.71.9
610.0.71.10/3110.0.71.10 – 10.0.71.1110.0.71.11
710.0.71.12/3110.0.71.12 – 10.0.71.1310.0.71.13
810.0.71.14/3110.0.71.14 – 10.0.71.1510.0.71.15
910.0.71.16/3110.0.71.16 – 10.0.71.1710.0.71.17
1010.0.71.18/3110.0.71.18 – 10.0.71.1910.0.71.19
1110.0.71.20/3110.0.71.20 – 10.0.71.2110.0.71.21
1210.0.71.22/3110.0.71.22 – 10.0.71.2310.0.71.23
1310.0.71.24/3110.0.71.24 – 10.0.71.2510.0.71.25
1410.0.71.26/3110.0.71.26 – 10.0.71.2710.0.71.27
1510.0.71.28/3110.0.71.28 – 10.0.71.2910.0.71.29
1610.0.71.30/3110.0.71.30 – 10.0.71.3110.0.71.31
1710.0.71.32/3110.0.71.32 – 10.0.71.3310.0.71.33
1810.0.71.34/3110.0.71.34 – 10.0.71.3510.0.71.35
1910.0.71.36/3110.0.71.36 – 10.0.71.3710.0.71.37
2010.0.71.38/3110.0.71.38 – 10.0.71.3910.0.71.39
2110.0.71.40/3110.0.71.40 – 10.0.71.4110.0.71.41
2210.0.71.42/3110.0.71.42 – 10.0.71.4310.0.71.43
2310.0.71.44/3110.0.71.44 – 10.0.71.4510.0.71.45
2410.0.71.46/3110.0.71.46 – 10.0.71.4710.0.71.47
2510.0.71.48/3110.0.71.48 – 10.0.71.4910.0.71.49
2610.0.71.50/3110.0.71.50 – 10.0.71.5110.0.71.51
2710.0.71.52/3110.0.71.52 – 10.0.71.5310.0.71.53
2810.0.71.54/3110.0.71.54 – 10.0.71.5510.0.71.55
2910.0.71.56/3110.0.71.56 – 10.0.71.5710.0.71.57
3010.0.71.58/3110.0.71.58 – 10.0.71.5910.0.71.59
3110.0.71.60/3110.0.71.60 – 10.0.71.6110.0.71.61
3210.0.71.62/3110.0.71.62 – 10.0.71.6310.0.71.63
3310.0.71.64/3110.0.71.64 – 10.0.71.6510.0.71.65
3410.0.71.66/3110.0.71.66 – 10.0.71.6710.0.71.67
3510.0.71.68/3110.0.71.68 – 10.0.71.6910.0.71.69
3610.0.71.70/3110.0.71.70 – 10.0.71.7110.0.71.71
3710.0.71.72/3110.0.71.72 – 10.0.71.7310.0.71.73
3810.0.71.74/3110.0.71.74 – 10.0.71.7510.0.71.75
3910.0.71.76/3110.0.71.76 – 10.0.71.7710.0.71.77
4010.0.71.78/3110.0.71.78 – 10.0.71.7910.0.71.79
4110.0.71.80/3110.0.71.80 – 10.0.71.8110.0.71.81
4210.0.71.82/3110.0.71.82 – 10.0.71.8310.0.71.83
4310.0.71.84/3110.0.71.84 – 10.0.71.8510.0.71.85
4410.0.71.86/3110.0.71.86 – 10.0.71.8710.0.71.87
4510.0.71.88/3110.0.71.88 – 10.0.71.8910.0.71.89
4610.0.71.90/3110.0.71.90 – 10.0.71.9110.0.71.91
4710.0.71.92/3110.0.71.92 – 10.0.71.9310.0.71.93
4810.0.71.94/3110.0.71.94 – 10.0.71.9510.0.71.95
4910.0.71.96/3110.0.71.96 – 10.0.71.9710.0.71.97
5010.0.71.98/3110.0.71.98 – 10.0.71.9910.0.71.99
5110.0.71.100/3110.0.71.100 – 10.0.71.10110.0.71.101
5210.0.71.102/3110.0.71.102 – 10.0.71.10310.0.71.103
5310.0.71.104/3110.0.71.104 – 10.0.71.10510.0.71.105
5410.0.71.106/3110.0.71.106 – 10.0.71.10710.0.71.107
5510.0.71.108/3110.0.71.108 – 10.0.71.10910.0.71.109
5610.0.71.110/3110.0.71.110 – 10.0.71.11110.0.71.111
5710.0.71.112/3110.0.71.112 – 10.0.71.11310.0.71.113
5810.0.71.114/3110.0.71.114 – 10.0.71.11510.0.71.115
5910.0.71.116/3110.0.71.116 – 10.0.71.11710.0.71.117
6010.0.71.118/3110.0.71.118 – 10.0.71.11910.0.71.119
6110.0.71.120/3110.0.71.120 – 10.0.71.12110.0.71.121
6210.0.71.122/3110.0.71.122 – 10.0.71.12310.0.71.123
6310.0.71.124/3110.0.71.124 – 10.0.71.12510.0.71.125
6410.0.71.126/3110.0.71.126 – 10.0.71.12710.0.71.127
6510.0.71.128/3110.0.71.128 – 10.0.71.12910.0.71.129
6610.0.71.130/3110.0.71.130 – 10.0.71.13110.0.71.131
6710.0.71.132/3110.0.71.132 – 10.0.71.13310.0.71.133
6810.0.71.134/3110.0.71.134 – 10.0.71.13510.0.71.135
6910.0.71.136/3110.0.71.136 – 10.0.71.13710.0.71.137
7010.0.71.138/3110.0.71.138 – 10.0.71.13910.0.71.139
7110.0.71.140/3110.0.71.140 – 10.0.71.14110.0.71.141
7210.0.71.142/3110.0.71.142 – 10.0.71.14310.0.71.143
7310.0.71.144/3110.0.71.144 – 10.0.71.14510.0.71.145
7410.0.71.146/3110.0.71.146 – 10.0.71.14710.0.71.147
7510.0.71.148/3110.0.71.148 – 10.0.71.14910.0.71.149
7610.0.71.150/3110.0.71.150 – 10.0.71.15110.0.71.151
7710.0.71.152/3110.0.71.152 – 10.0.71.15310.0.71.153
7810.0.71.154/3110.0.71.154 – 10.0.71.15510.0.71.155
7910.0.71.156/3110.0.71.156 – 10.0.71.15710.0.71.157
8010.0.71.158/3110.0.71.158 – 10.0.71.15910.0.71.159
8110.0.71.160/3110.0.71.160 – 10.0.71.16110.0.71.161
8210.0.71.162/3110.0.71.162 – 10.0.71.16310.0.71.163
8310.0.71.164/3110.0.71.164 – 10.0.71.16510.0.71.165
8410.0.71.166/3110.0.71.166 – 10.0.71.16710.0.71.167
8510.0.71.168/3110.0.71.168 – 10.0.71.16910.0.71.169
8610.0.71.170/3110.0.71.170 – 10.0.71.17110.0.71.171
8710.0.71.172/3110.0.71.172 – 10.0.71.17310.0.71.173
8810.0.71.174/3110.0.71.174 – 10.0.71.17510.0.71.175
8910.0.71.176/3110.0.71.176 – 10.0.71.17710.0.71.177
9010.0.71.178/3110.0.71.178 – 10.0.71.17910.0.71.179
9110.0.71.180/3110.0.71.180 – 10.0.71.18110.0.71.181
9210.0.71.182/3110.0.71.182 – 10.0.71.18310.0.71.183
9310.0.71.184/3110.0.71.184 – 10.0.71.18510.0.71.185
9410.0.71.186/3110.0.71.186 – 10.0.71.18710.0.71.187
9510.0.71.188/3110.0.71.188 – 10.0.71.18910.0.71.189
9610.0.71.190/3110.0.71.190 – 10.0.71.19110.0.71.191
9710.0.71.192/3110.0.71.192 – 10.0.71.19310.0.71.193
9810.0.71.194/3110.0.71.194 – 10.0.71.19510.0.71.195
9910.0.71.196/3110.0.71.196 – 10.0.71.19710.0.71.197
10010.0.71.198/3110.0.71.198 – 10.0.71.19910.0.71.199
10110.0.71.200/3110.0.71.200 – 10.0.71.20110.0.71.201
10210.0.71.202/3110.0.71.202 – 10.0.71.20310.0.71.203
10310.0.71.204/3110.0.71.204 – 10.0.71.20510.0.71.205
10410.0.71.206/3110.0.71.206 – 10.0.71.20710.0.71.207
10510.0.71.208/3110.0.71.208 – 10.0.71.20910.0.71.209
10610.0.71.210/3110.0.71.210 – 10.0.71.21110.0.71.211
10710.0.71.212/3110.0.71.212 – 10.0.71.21310.0.71.213
10810.0.71.214/3110.0.71.214 – 10.0.71.21510.0.71.215
10910.0.71.216/3110.0.71.216 – 10.0.71.21710.0.71.217
11010.0.71.218/3110.0.71.218 – 10.0.71.21910.0.71.219
11110.0.71.220/3110.0.71.220 – 10.0.71.22110.0.71.221
11210.0.71.222/3110.0.71.222 – 10.0.71.22310.0.71.223
11310.0.71.224/3110.0.71.224 – 10.0.71.22510.0.71.225
11410.0.71.226/3110.0.71.226 – 10.0.71.22710.0.71.227
11510.0.71.228/3110.0.71.228 – 10.0.71.22910.0.71.229
11610.0.71.230/3110.0.71.230 – 10.0.71.23110.0.71.231
11710.0.71.232/3110.0.71.232 – 10.0.71.23310.0.71.233
11810.0.71.234/3110.0.71.234 – 10.0.71.23510.0.71.235
11910.0.71.236/3110.0.71.236 – 10.0.71.23710.0.71.237
12010.0.71.238/3110.0.71.238 – 10.0.71.23910.0.71.239
12110.0.71.240/3110.0.71.240 – 10.0.71.24110.0.71.241
12210.0.71.242/3110.0.71.242 – 10.0.71.24310.0.71.243
12310.0.71.244/3110.0.71.244 – 10.0.71.24510.0.71.245
12410.0.71.246/3110.0.71.246 – 10.0.71.24710.0.71.247
12510.0.71.248/3110.0.71.248 – 10.0.71.24910.0.71.249
12610.0.71.250/3110.0.71.250 – 10.0.71.25110.0.71.251
12710.0.71.252/3110.0.71.252 – 10.0.71.25310.0.71.253
12810.0.71.254/3110.0.71.254 – 10.0.71.25510.0.71.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /24
/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-
/23255.255.254.0512510-
/24255.255.255.02562541
/25255.255.255.1281281262 split →
/26255.255.255.19264624 split →
/27255.255.255.22432308 split →
/28255.255.255.240161416 split →
/29255.255.255.2488632 split →
/30255.255.255.2524264 split →
/31255.255.255.25422128 split →
/32255.255.255.25511256 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 →