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)10.3.71.0/24
network10.3.71.0/24
broadcast10.3.71.255
first host10.3.71.1
last host10.3.71.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.3.71.0/24
address00001010.00000011.01000111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000011.01000111.00000000
broadcast00001010.00000011.01000111.11111111
green = network part, grey = host part
hex0x0a034700
decimal167986944
reverse dns0.71.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:4700

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.71.0/3110.3.71.0 – 10.3.71.110.3.71.1
210.3.71.2/3110.3.71.2 – 10.3.71.310.3.71.3
310.3.71.4/3110.3.71.4 – 10.3.71.510.3.71.5
410.3.71.6/3110.3.71.6 – 10.3.71.710.3.71.7
510.3.71.8/3110.3.71.8 – 10.3.71.910.3.71.9
610.3.71.10/3110.3.71.10 – 10.3.71.1110.3.71.11
710.3.71.12/3110.3.71.12 – 10.3.71.1310.3.71.13
810.3.71.14/3110.3.71.14 – 10.3.71.1510.3.71.15
910.3.71.16/3110.3.71.16 – 10.3.71.1710.3.71.17
1010.3.71.18/3110.3.71.18 – 10.3.71.1910.3.71.19
1110.3.71.20/3110.3.71.20 – 10.3.71.2110.3.71.21
1210.3.71.22/3110.3.71.22 – 10.3.71.2310.3.71.23
1310.3.71.24/3110.3.71.24 – 10.3.71.2510.3.71.25
1410.3.71.26/3110.3.71.26 – 10.3.71.2710.3.71.27
1510.3.71.28/3110.3.71.28 – 10.3.71.2910.3.71.29
1610.3.71.30/3110.3.71.30 – 10.3.71.3110.3.71.31
1710.3.71.32/3110.3.71.32 – 10.3.71.3310.3.71.33
1810.3.71.34/3110.3.71.34 – 10.3.71.3510.3.71.35
1910.3.71.36/3110.3.71.36 – 10.3.71.3710.3.71.37
2010.3.71.38/3110.3.71.38 – 10.3.71.3910.3.71.39
2110.3.71.40/3110.3.71.40 – 10.3.71.4110.3.71.41
2210.3.71.42/3110.3.71.42 – 10.3.71.4310.3.71.43
2310.3.71.44/3110.3.71.44 – 10.3.71.4510.3.71.45
2410.3.71.46/3110.3.71.46 – 10.3.71.4710.3.71.47
2510.3.71.48/3110.3.71.48 – 10.3.71.4910.3.71.49
2610.3.71.50/3110.3.71.50 – 10.3.71.5110.3.71.51
2710.3.71.52/3110.3.71.52 – 10.3.71.5310.3.71.53
2810.3.71.54/3110.3.71.54 – 10.3.71.5510.3.71.55
2910.3.71.56/3110.3.71.56 – 10.3.71.5710.3.71.57
3010.3.71.58/3110.3.71.58 – 10.3.71.5910.3.71.59
3110.3.71.60/3110.3.71.60 – 10.3.71.6110.3.71.61
3210.3.71.62/3110.3.71.62 – 10.3.71.6310.3.71.63
3310.3.71.64/3110.3.71.64 – 10.3.71.6510.3.71.65
3410.3.71.66/3110.3.71.66 – 10.3.71.6710.3.71.67
3510.3.71.68/3110.3.71.68 – 10.3.71.6910.3.71.69
3610.3.71.70/3110.3.71.70 – 10.3.71.7110.3.71.71
3710.3.71.72/3110.3.71.72 – 10.3.71.7310.3.71.73
3810.3.71.74/3110.3.71.74 – 10.3.71.7510.3.71.75
3910.3.71.76/3110.3.71.76 – 10.3.71.7710.3.71.77
4010.3.71.78/3110.3.71.78 – 10.3.71.7910.3.71.79
4110.3.71.80/3110.3.71.80 – 10.3.71.8110.3.71.81
4210.3.71.82/3110.3.71.82 – 10.3.71.8310.3.71.83
4310.3.71.84/3110.3.71.84 – 10.3.71.8510.3.71.85
4410.3.71.86/3110.3.71.86 – 10.3.71.8710.3.71.87
4510.3.71.88/3110.3.71.88 – 10.3.71.8910.3.71.89
4610.3.71.90/3110.3.71.90 – 10.3.71.9110.3.71.91
4710.3.71.92/3110.3.71.92 – 10.3.71.9310.3.71.93
4810.3.71.94/3110.3.71.94 – 10.3.71.9510.3.71.95
4910.3.71.96/3110.3.71.96 – 10.3.71.9710.3.71.97
5010.3.71.98/3110.3.71.98 – 10.3.71.9910.3.71.99
5110.3.71.100/3110.3.71.100 – 10.3.71.10110.3.71.101
5210.3.71.102/3110.3.71.102 – 10.3.71.10310.3.71.103
5310.3.71.104/3110.3.71.104 – 10.3.71.10510.3.71.105
5410.3.71.106/3110.3.71.106 – 10.3.71.10710.3.71.107
5510.3.71.108/3110.3.71.108 – 10.3.71.10910.3.71.109
5610.3.71.110/3110.3.71.110 – 10.3.71.11110.3.71.111
5710.3.71.112/3110.3.71.112 – 10.3.71.11310.3.71.113
5810.3.71.114/3110.3.71.114 – 10.3.71.11510.3.71.115
5910.3.71.116/3110.3.71.116 – 10.3.71.11710.3.71.117
6010.3.71.118/3110.3.71.118 – 10.3.71.11910.3.71.119
6110.3.71.120/3110.3.71.120 – 10.3.71.12110.3.71.121
6210.3.71.122/3110.3.71.122 – 10.3.71.12310.3.71.123
6310.3.71.124/3110.3.71.124 – 10.3.71.12510.3.71.125
6410.3.71.126/3110.3.71.126 – 10.3.71.12710.3.71.127
6510.3.71.128/3110.3.71.128 – 10.3.71.12910.3.71.129
6610.3.71.130/3110.3.71.130 – 10.3.71.13110.3.71.131
6710.3.71.132/3110.3.71.132 – 10.3.71.13310.3.71.133
6810.3.71.134/3110.3.71.134 – 10.3.71.13510.3.71.135
6910.3.71.136/3110.3.71.136 – 10.3.71.13710.3.71.137
7010.3.71.138/3110.3.71.138 – 10.3.71.13910.3.71.139
7110.3.71.140/3110.3.71.140 – 10.3.71.14110.3.71.141
7210.3.71.142/3110.3.71.142 – 10.3.71.14310.3.71.143
7310.3.71.144/3110.3.71.144 – 10.3.71.14510.3.71.145
7410.3.71.146/3110.3.71.146 – 10.3.71.14710.3.71.147
7510.3.71.148/3110.3.71.148 – 10.3.71.14910.3.71.149
7610.3.71.150/3110.3.71.150 – 10.3.71.15110.3.71.151
7710.3.71.152/3110.3.71.152 – 10.3.71.15310.3.71.153
7810.3.71.154/3110.3.71.154 – 10.3.71.15510.3.71.155
7910.3.71.156/3110.3.71.156 – 10.3.71.15710.3.71.157
8010.3.71.158/3110.3.71.158 – 10.3.71.15910.3.71.159
8110.3.71.160/3110.3.71.160 – 10.3.71.16110.3.71.161
8210.3.71.162/3110.3.71.162 – 10.3.71.16310.3.71.163
8310.3.71.164/3110.3.71.164 – 10.3.71.16510.3.71.165
8410.3.71.166/3110.3.71.166 – 10.3.71.16710.3.71.167
8510.3.71.168/3110.3.71.168 – 10.3.71.16910.3.71.169
8610.3.71.170/3110.3.71.170 – 10.3.71.17110.3.71.171
8710.3.71.172/3110.3.71.172 – 10.3.71.17310.3.71.173
8810.3.71.174/3110.3.71.174 – 10.3.71.17510.3.71.175
8910.3.71.176/3110.3.71.176 – 10.3.71.17710.3.71.177
9010.3.71.178/3110.3.71.178 – 10.3.71.17910.3.71.179
9110.3.71.180/3110.3.71.180 – 10.3.71.18110.3.71.181
9210.3.71.182/3110.3.71.182 – 10.3.71.18310.3.71.183
9310.3.71.184/3110.3.71.184 – 10.3.71.18510.3.71.185
9410.3.71.186/3110.3.71.186 – 10.3.71.18710.3.71.187
9510.3.71.188/3110.3.71.188 – 10.3.71.18910.3.71.189
9610.3.71.190/3110.3.71.190 – 10.3.71.19110.3.71.191
9710.3.71.192/3110.3.71.192 – 10.3.71.19310.3.71.193
9810.3.71.194/3110.3.71.194 – 10.3.71.19510.3.71.195
9910.3.71.196/3110.3.71.196 – 10.3.71.19710.3.71.197
10010.3.71.198/3110.3.71.198 – 10.3.71.19910.3.71.199
10110.3.71.200/3110.3.71.200 – 10.3.71.20110.3.71.201
10210.3.71.202/3110.3.71.202 – 10.3.71.20310.3.71.203
10310.3.71.204/3110.3.71.204 – 10.3.71.20510.3.71.205
10410.3.71.206/3110.3.71.206 – 10.3.71.20710.3.71.207
10510.3.71.208/3110.3.71.208 – 10.3.71.20910.3.71.209
10610.3.71.210/3110.3.71.210 – 10.3.71.21110.3.71.211
10710.3.71.212/3110.3.71.212 – 10.3.71.21310.3.71.213
10810.3.71.214/3110.3.71.214 – 10.3.71.21510.3.71.215
10910.3.71.216/3110.3.71.216 – 10.3.71.21710.3.71.217
11010.3.71.218/3110.3.71.218 – 10.3.71.21910.3.71.219
11110.3.71.220/3110.3.71.220 – 10.3.71.22110.3.71.221
11210.3.71.222/3110.3.71.222 – 10.3.71.22310.3.71.223
11310.3.71.224/3110.3.71.224 – 10.3.71.22510.3.71.225
11410.3.71.226/3110.3.71.226 – 10.3.71.22710.3.71.227
11510.3.71.228/3110.3.71.228 – 10.3.71.22910.3.71.229
11610.3.71.230/3110.3.71.230 – 10.3.71.23110.3.71.231
11710.3.71.232/3110.3.71.232 – 10.3.71.23310.3.71.233
11810.3.71.234/3110.3.71.234 – 10.3.71.23510.3.71.235
11910.3.71.236/3110.3.71.236 – 10.3.71.23710.3.71.237
12010.3.71.238/3110.3.71.238 – 10.3.71.23910.3.71.239
12110.3.71.240/3110.3.71.240 – 10.3.71.24110.3.71.241
12210.3.71.242/3110.3.71.242 – 10.3.71.24310.3.71.243
12310.3.71.244/3110.3.71.244 – 10.3.71.24510.3.71.245
12410.3.71.246/3110.3.71.246 – 10.3.71.24710.3.71.247
12510.3.71.248/3110.3.71.248 – 10.3.71.24910.3.71.249
12610.3.71.250/3110.3.71.250 – 10.3.71.25110.3.71.251
12710.3.71.252/3110.3.71.252 – 10.3.71.25310.3.71.253
12810.3.71.254/3110.3.71.254 – 10.3.71.25510.3.71.255
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 →