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)10.56.3.0/24
network10.56.3.0/24
broadcast10.56.3.255
first host10.56.3.1
last host10.56.3.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.56.3.0/24
address00001010.00111000.00000011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00111000.00000011.00000000
broadcast00001010.00111000.00000011.11111111
green = network part, grey = host part
hex0x0a380300
decimal171442944
reverse dns0.3.56.10.in-addr.arpa
ipv4-mapped::ffff:a38:300

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.56.3.0/3110.56.3.0 – 10.56.3.110.56.3.1
210.56.3.2/3110.56.3.2 – 10.56.3.310.56.3.3
310.56.3.4/3110.56.3.4 – 10.56.3.510.56.3.5
410.56.3.6/3110.56.3.6 – 10.56.3.710.56.3.7
510.56.3.8/3110.56.3.8 – 10.56.3.910.56.3.9
610.56.3.10/3110.56.3.10 – 10.56.3.1110.56.3.11
710.56.3.12/3110.56.3.12 – 10.56.3.1310.56.3.13
810.56.3.14/3110.56.3.14 – 10.56.3.1510.56.3.15
910.56.3.16/3110.56.3.16 – 10.56.3.1710.56.3.17
1010.56.3.18/3110.56.3.18 – 10.56.3.1910.56.3.19
1110.56.3.20/3110.56.3.20 – 10.56.3.2110.56.3.21
1210.56.3.22/3110.56.3.22 – 10.56.3.2310.56.3.23
1310.56.3.24/3110.56.3.24 – 10.56.3.2510.56.3.25
1410.56.3.26/3110.56.3.26 – 10.56.3.2710.56.3.27
1510.56.3.28/3110.56.3.28 – 10.56.3.2910.56.3.29
1610.56.3.30/3110.56.3.30 – 10.56.3.3110.56.3.31
1710.56.3.32/3110.56.3.32 – 10.56.3.3310.56.3.33
1810.56.3.34/3110.56.3.34 – 10.56.3.3510.56.3.35
1910.56.3.36/3110.56.3.36 – 10.56.3.3710.56.3.37
2010.56.3.38/3110.56.3.38 – 10.56.3.3910.56.3.39
2110.56.3.40/3110.56.3.40 – 10.56.3.4110.56.3.41
2210.56.3.42/3110.56.3.42 – 10.56.3.4310.56.3.43
2310.56.3.44/3110.56.3.44 – 10.56.3.4510.56.3.45
2410.56.3.46/3110.56.3.46 – 10.56.3.4710.56.3.47
2510.56.3.48/3110.56.3.48 – 10.56.3.4910.56.3.49
2610.56.3.50/3110.56.3.50 – 10.56.3.5110.56.3.51
2710.56.3.52/3110.56.3.52 – 10.56.3.5310.56.3.53
2810.56.3.54/3110.56.3.54 – 10.56.3.5510.56.3.55
2910.56.3.56/3110.56.3.56 – 10.56.3.5710.56.3.57
3010.56.3.58/3110.56.3.58 – 10.56.3.5910.56.3.59
3110.56.3.60/3110.56.3.60 – 10.56.3.6110.56.3.61
3210.56.3.62/3110.56.3.62 – 10.56.3.6310.56.3.63
3310.56.3.64/3110.56.3.64 – 10.56.3.6510.56.3.65
3410.56.3.66/3110.56.3.66 – 10.56.3.6710.56.3.67
3510.56.3.68/3110.56.3.68 – 10.56.3.6910.56.3.69
3610.56.3.70/3110.56.3.70 – 10.56.3.7110.56.3.71
3710.56.3.72/3110.56.3.72 – 10.56.3.7310.56.3.73
3810.56.3.74/3110.56.3.74 – 10.56.3.7510.56.3.75
3910.56.3.76/3110.56.3.76 – 10.56.3.7710.56.3.77
4010.56.3.78/3110.56.3.78 – 10.56.3.7910.56.3.79
4110.56.3.80/3110.56.3.80 – 10.56.3.8110.56.3.81
4210.56.3.82/3110.56.3.82 – 10.56.3.8310.56.3.83
4310.56.3.84/3110.56.3.84 – 10.56.3.8510.56.3.85
4410.56.3.86/3110.56.3.86 – 10.56.3.8710.56.3.87
4510.56.3.88/3110.56.3.88 – 10.56.3.8910.56.3.89
4610.56.3.90/3110.56.3.90 – 10.56.3.9110.56.3.91
4710.56.3.92/3110.56.3.92 – 10.56.3.9310.56.3.93
4810.56.3.94/3110.56.3.94 – 10.56.3.9510.56.3.95
4910.56.3.96/3110.56.3.96 – 10.56.3.9710.56.3.97
5010.56.3.98/3110.56.3.98 – 10.56.3.9910.56.3.99
5110.56.3.100/3110.56.3.100 – 10.56.3.10110.56.3.101
5210.56.3.102/3110.56.3.102 – 10.56.3.10310.56.3.103
5310.56.3.104/3110.56.3.104 – 10.56.3.10510.56.3.105
5410.56.3.106/3110.56.3.106 – 10.56.3.10710.56.3.107
5510.56.3.108/3110.56.3.108 – 10.56.3.10910.56.3.109
5610.56.3.110/3110.56.3.110 – 10.56.3.11110.56.3.111
5710.56.3.112/3110.56.3.112 – 10.56.3.11310.56.3.113
5810.56.3.114/3110.56.3.114 – 10.56.3.11510.56.3.115
5910.56.3.116/3110.56.3.116 – 10.56.3.11710.56.3.117
6010.56.3.118/3110.56.3.118 – 10.56.3.11910.56.3.119
6110.56.3.120/3110.56.3.120 – 10.56.3.12110.56.3.121
6210.56.3.122/3110.56.3.122 – 10.56.3.12310.56.3.123
6310.56.3.124/3110.56.3.124 – 10.56.3.12510.56.3.125
6410.56.3.126/3110.56.3.126 – 10.56.3.12710.56.3.127
6510.56.3.128/3110.56.3.128 – 10.56.3.12910.56.3.129
6610.56.3.130/3110.56.3.130 – 10.56.3.13110.56.3.131
6710.56.3.132/3110.56.3.132 – 10.56.3.13310.56.3.133
6810.56.3.134/3110.56.3.134 – 10.56.3.13510.56.3.135
6910.56.3.136/3110.56.3.136 – 10.56.3.13710.56.3.137
7010.56.3.138/3110.56.3.138 – 10.56.3.13910.56.3.139
7110.56.3.140/3110.56.3.140 – 10.56.3.14110.56.3.141
7210.56.3.142/3110.56.3.142 – 10.56.3.14310.56.3.143
7310.56.3.144/3110.56.3.144 – 10.56.3.14510.56.3.145
7410.56.3.146/3110.56.3.146 – 10.56.3.14710.56.3.147
7510.56.3.148/3110.56.3.148 – 10.56.3.14910.56.3.149
7610.56.3.150/3110.56.3.150 – 10.56.3.15110.56.3.151
7710.56.3.152/3110.56.3.152 – 10.56.3.15310.56.3.153
7810.56.3.154/3110.56.3.154 – 10.56.3.15510.56.3.155
7910.56.3.156/3110.56.3.156 – 10.56.3.15710.56.3.157
8010.56.3.158/3110.56.3.158 – 10.56.3.15910.56.3.159
8110.56.3.160/3110.56.3.160 – 10.56.3.16110.56.3.161
8210.56.3.162/3110.56.3.162 – 10.56.3.16310.56.3.163
8310.56.3.164/3110.56.3.164 – 10.56.3.16510.56.3.165
8410.56.3.166/3110.56.3.166 – 10.56.3.16710.56.3.167
8510.56.3.168/3110.56.3.168 – 10.56.3.16910.56.3.169
8610.56.3.170/3110.56.3.170 – 10.56.3.17110.56.3.171
8710.56.3.172/3110.56.3.172 – 10.56.3.17310.56.3.173
8810.56.3.174/3110.56.3.174 – 10.56.3.17510.56.3.175
8910.56.3.176/3110.56.3.176 – 10.56.3.17710.56.3.177
9010.56.3.178/3110.56.3.178 – 10.56.3.17910.56.3.179
9110.56.3.180/3110.56.3.180 – 10.56.3.18110.56.3.181
9210.56.3.182/3110.56.3.182 – 10.56.3.18310.56.3.183
9310.56.3.184/3110.56.3.184 – 10.56.3.18510.56.3.185
9410.56.3.186/3110.56.3.186 – 10.56.3.18710.56.3.187
9510.56.3.188/3110.56.3.188 – 10.56.3.18910.56.3.189
9610.56.3.190/3110.56.3.190 – 10.56.3.19110.56.3.191
9710.56.3.192/3110.56.3.192 – 10.56.3.19310.56.3.193
9810.56.3.194/3110.56.3.194 – 10.56.3.19510.56.3.195
9910.56.3.196/3110.56.3.196 – 10.56.3.19710.56.3.197
10010.56.3.198/3110.56.3.198 – 10.56.3.19910.56.3.199
10110.56.3.200/3110.56.3.200 – 10.56.3.20110.56.3.201
10210.56.3.202/3110.56.3.202 – 10.56.3.20310.56.3.203
10310.56.3.204/3110.56.3.204 – 10.56.3.20510.56.3.205
10410.56.3.206/3110.56.3.206 – 10.56.3.20710.56.3.207
10510.56.3.208/3110.56.3.208 – 10.56.3.20910.56.3.209
10610.56.3.210/3110.56.3.210 – 10.56.3.21110.56.3.211
10710.56.3.212/3110.56.3.212 – 10.56.3.21310.56.3.213
10810.56.3.214/3110.56.3.214 – 10.56.3.21510.56.3.215
10910.56.3.216/3110.56.3.216 – 10.56.3.21710.56.3.217
11010.56.3.218/3110.56.3.218 – 10.56.3.21910.56.3.219
11110.56.3.220/3110.56.3.220 – 10.56.3.22110.56.3.221
11210.56.3.222/3110.56.3.222 – 10.56.3.22310.56.3.223
11310.56.3.224/3110.56.3.224 – 10.56.3.22510.56.3.225
11410.56.3.226/3110.56.3.226 – 10.56.3.22710.56.3.227
11510.56.3.228/3110.56.3.228 – 10.56.3.22910.56.3.229
11610.56.3.230/3110.56.3.230 – 10.56.3.23110.56.3.231
11710.56.3.232/3110.56.3.232 – 10.56.3.23310.56.3.233
11810.56.3.234/3110.56.3.234 – 10.56.3.23510.56.3.235
11910.56.3.236/3110.56.3.236 – 10.56.3.23710.56.3.237
12010.56.3.238/3110.56.3.238 – 10.56.3.23910.56.3.239
12110.56.3.240/3110.56.3.240 – 10.56.3.24110.56.3.241
12210.56.3.242/3110.56.3.242 – 10.56.3.24310.56.3.243
12310.56.3.244/3110.56.3.244 – 10.56.3.24510.56.3.245
12410.56.3.246/3110.56.3.246 – 10.56.3.24710.56.3.247
12510.56.3.248/3110.56.3.248 – 10.56.3.24910.56.3.249
12610.56.3.250/3110.56.3.250 – 10.56.3.25110.56.3.251
12710.56.3.252/3110.56.3.252 – 10.56.3.25310.56.3.253
12810.56.3.254/3110.56.3.254 – 10.56.3.25510.56.3.255
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 →