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)10.3.56.0/24
network10.3.56.0/24
broadcast10.3.56.255
first host10.3.56.1
last host10.3.56.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.3.56.0/24
address00001010.00000011.00111000.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000011.00111000.00000000
broadcast00001010.00000011.00111000.11111111
green = network part, grey = host part
hex0x0a033800
decimal167983104
reverse dns0.56.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:3800

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.56.0/3110.3.56.0 – 10.3.56.110.3.56.1
210.3.56.2/3110.3.56.2 – 10.3.56.310.3.56.3
310.3.56.4/3110.3.56.4 – 10.3.56.510.3.56.5
410.3.56.6/3110.3.56.6 – 10.3.56.710.3.56.7
510.3.56.8/3110.3.56.8 – 10.3.56.910.3.56.9
610.3.56.10/3110.3.56.10 – 10.3.56.1110.3.56.11
710.3.56.12/3110.3.56.12 – 10.3.56.1310.3.56.13
810.3.56.14/3110.3.56.14 – 10.3.56.1510.3.56.15
910.3.56.16/3110.3.56.16 – 10.3.56.1710.3.56.17
1010.3.56.18/3110.3.56.18 – 10.3.56.1910.3.56.19
1110.3.56.20/3110.3.56.20 – 10.3.56.2110.3.56.21
1210.3.56.22/3110.3.56.22 – 10.3.56.2310.3.56.23
1310.3.56.24/3110.3.56.24 – 10.3.56.2510.3.56.25
1410.3.56.26/3110.3.56.26 – 10.3.56.2710.3.56.27
1510.3.56.28/3110.3.56.28 – 10.3.56.2910.3.56.29
1610.3.56.30/3110.3.56.30 – 10.3.56.3110.3.56.31
1710.3.56.32/3110.3.56.32 – 10.3.56.3310.3.56.33
1810.3.56.34/3110.3.56.34 – 10.3.56.3510.3.56.35
1910.3.56.36/3110.3.56.36 – 10.3.56.3710.3.56.37
2010.3.56.38/3110.3.56.38 – 10.3.56.3910.3.56.39
2110.3.56.40/3110.3.56.40 – 10.3.56.4110.3.56.41
2210.3.56.42/3110.3.56.42 – 10.3.56.4310.3.56.43
2310.3.56.44/3110.3.56.44 – 10.3.56.4510.3.56.45
2410.3.56.46/3110.3.56.46 – 10.3.56.4710.3.56.47
2510.3.56.48/3110.3.56.48 – 10.3.56.4910.3.56.49
2610.3.56.50/3110.3.56.50 – 10.3.56.5110.3.56.51
2710.3.56.52/3110.3.56.52 – 10.3.56.5310.3.56.53
2810.3.56.54/3110.3.56.54 – 10.3.56.5510.3.56.55
2910.3.56.56/3110.3.56.56 – 10.3.56.5710.3.56.57
3010.3.56.58/3110.3.56.58 – 10.3.56.5910.3.56.59
3110.3.56.60/3110.3.56.60 – 10.3.56.6110.3.56.61
3210.3.56.62/3110.3.56.62 – 10.3.56.6310.3.56.63
3310.3.56.64/3110.3.56.64 – 10.3.56.6510.3.56.65
3410.3.56.66/3110.3.56.66 – 10.3.56.6710.3.56.67
3510.3.56.68/3110.3.56.68 – 10.3.56.6910.3.56.69
3610.3.56.70/3110.3.56.70 – 10.3.56.7110.3.56.71
3710.3.56.72/3110.3.56.72 – 10.3.56.7310.3.56.73
3810.3.56.74/3110.3.56.74 – 10.3.56.7510.3.56.75
3910.3.56.76/3110.3.56.76 – 10.3.56.7710.3.56.77
4010.3.56.78/3110.3.56.78 – 10.3.56.7910.3.56.79
4110.3.56.80/3110.3.56.80 – 10.3.56.8110.3.56.81
4210.3.56.82/3110.3.56.82 – 10.3.56.8310.3.56.83
4310.3.56.84/3110.3.56.84 – 10.3.56.8510.3.56.85
4410.3.56.86/3110.3.56.86 – 10.3.56.8710.3.56.87
4510.3.56.88/3110.3.56.88 – 10.3.56.8910.3.56.89
4610.3.56.90/3110.3.56.90 – 10.3.56.9110.3.56.91
4710.3.56.92/3110.3.56.92 – 10.3.56.9310.3.56.93
4810.3.56.94/3110.3.56.94 – 10.3.56.9510.3.56.95
4910.3.56.96/3110.3.56.96 – 10.3.56.9710.3.56.97
5010.3.56.98/3110.3.56.98 – 10.3.56.9910.3.56.99
5110.3.56.100/3110.3.56.100 – 10.3.56.10110.3.56.101
5210.3.56.102/3110.3.56.102 – 10.3.56.10310.3.56.103
5310.3.56.104/3110.3.56.104 – 10.3.56.10510.3.56.105
5410.3.56.106/3110.3.56.106 – 10.3.56.10710.3.56.107
5510.3.56.108/3110.3.56.108 – 10.3.56.10910.3.56.109
5610.3.56.110/3110.3.56.110 – 10.3.56.11110.3.56.111
5710.3.56.112/3110.3.56.112 – 10.3.56.11310.3.56.113
5810.3.56.114/3110.3.56.114 – 10.3.56.11510.3.56.115
5910.3.56.116/3110.3.56.116 – 10.3.56.11710.3.56.117
6010.3.56.118/3110.3.56.118 – 10.3.56.11910.3.56.119
6110.3.56.120/3110.3.56.120 – 10.3.56.12110.3.56.121
6210.3.56.122/3110.3.56.122 – 10.3.56.12310.3.56.123
6310.3.56.124/3110.3.56.124 – 10.3.56.12510.3.56.125
6410.3.56.126/3110.3.56.126 – 10.3.56.12710.3.56.127
6510.3.56.128/3110.3.56.128 – 10.3.56.12910.3.56.129
6610.3.56.130/3110.3.56.130 – 10.3.56.13110.3.56.131
6710.3.56.132/3110.3.56.132 – 10.3.56.13310.3.56.133
6810.3.56.134/3110.3.56.134 – 10.3.56.13510.3.56.135
6910.3.56.136/3110.3.56.136 – 10.3.56.13710.3.56.137
7010.3.56.138/3110.3.56.138 – 10.3.56.13910.3.56.139
7110.3.56.140/3110.3.56.140 – 10.3.56.14110.3.56.141
7210.3.56.142/3110.3.56.142 – 10.3.56.14310.3.56.143
7310.3.56.144/3110.3.56.144 – 10.3.56.14510.3.56.145
7410.3.56.146/3110.3.56.146 – 10.3.56.14710.3.56.147
7510.3.56.148/3110.3.56.148 – 10.3.56.14910.3.56.149
7610.3.56.150/3110.3.56.150 – 10.3.56.15110.3.56.151
7710.3.56.152/3110.3.56.152 – 10.3.56.15310.3.56.153
7810.3.56.154/3110.3.56.154 – 10.3.56.15510.3.56.155
7910.3.56.156/3110.3.56.156 – 10.3.56.15710.3.56.157
8010.3.56.158/3110.3.56.158 – 10.3.56.15910.3.56.159
8110.3.56.160/3110.3.56.160 – 10.3.56.16110.3.56.161
8210.3.56.162/3110.3.56.162 – 10.3.56.16310.3.56.163
8310.3.56.164/3110.3.56.164 – 10.3.56.16510.3.56.165
8410.3.56.166/3110.3.56.166 – 10.3.56.16710.3.56.167
8510.3.56.168/3110.3.56.168 – 10.3.56.16910.3.56.169
8610.3.56.170/3110.3.56.170 – 10.3.56.17110.3.56.171
8710.3.56.172/3110.3.56.172 – 10.3.56.17310.3.56.173
8810.3.56.174/3110.3.56.174 – 10.3.56.17510.3.56.175
8910.3.56.176/3110.3.56.176 – 10.3.56.17710.3.56.177
9010.3.56.178/3110.3.56.178 – 10.3.56.17910.3.56.179
9110.3.56.180/3110.3.56.180 – 10.3.56.18110.3.56.181
9210.3.56.182/3110.3.56.182 – 10.3.56.18310.3.56.183
9310.3.56.184/3110.3.56.184 – 10.3.56.18510.3.56.185
9410.3.56.186/3110.3.56.186 – 10.3.56.18710.3.56.187
9510.3.56.188/3110.3.56.188 – 10.3.56.18910.3.56.189
9610.3.56.190/3110.3.56.190 – 10.3.56.19110.3.56.191
9710.3.56.192/3110.3.56.192 – 10.3.56.19310.3.56.193
9810.3.56.194/3110.3.56.194 – 10.3.56.19510.3.56.195
9910.3.56.196/3110.3.56.196 – 10.3.56.19710.3.56.197
10010.3.56.198/3110.3.56.198 – 10.3.56.19910.3.56.199
10110.3.56.200/3110.3.56.200 – 10.3.56.20110.3.56.201
10210.3.56.202/3110.3.56.202 – 10.3.56.20310.3.56.203
10310.3.56.204/3110.3.56.204 – 10.3.56.20510.3.56.205
10410.3.56.206/3110.3.56.206 – 10.3.56.20710.3.56.207
10510.3.56.208/3110.3.56.208 – 10.3.56.20910.3.56.209
10610.3.56.210/3110.3.56.210 – 10.3.56.21110.3.56.211
10710.3.56.212/3110.3.56.212 – 10.3.56.21310.3.56.213
10810.3.56.214/3110.3.56.214 – 10.3.56.21510.3.56.215
10910.3.56.216/3110.3.56.216 – 10.3.56.21710.3.56.217
11010.3.56.218/3110.3.56.218 – 10.3.56.21910.3.56.219
11110.3.56.220/3110.3.56.220 – 10.3.56.22110.3.56.221
11210.3.56.222/3110.3.56.222 – 10.3.56.22310.3.56.223
11310.3.56.224/3110.3.56.224 – 10.3.56.22510.3.56.225
11410.3.56.226/3110.3.56.226 – 10.3.56.22710.3.56.227
11510.3.56.228/3110.3.56.228 – 10.3.56.22910.3.56.229
11610.3.56.230/3110.3.56.230 – 10.3.56.23110.3.56.231
11710.3.56.232/3110.3.56.232 – 10.3.56.23310.3.56.233
11810.3.56.234/3110.3.56.234 – 10.3.56.23510.3.56.235
11910.3.56.236/3110.3.56.236 – 10.3.56.23710.3.56.237
12010.3.56.238/3110.3.56.238 – 10.3.56.23910.3.56.239
12110.3.56.240/3110.3.56.240 – 10.3.56.24110.3.56.241
12210.3.56.242/3110.3.56.242 – 10.3.56.24310.3.56.243
12310.3.56.244/3110.3.56.244 – 10.3.56.24510.3.56.245
12410.3.56.246/3110.3.56.246 – 10.3.56.24710.3.56.247
12510.3.56.248/3110.3.56.248 – 10.3.56.24910.3.56.249
12610.3.56.250/3110.3.56.250 – 10.3.56.25110.3.56.251
12710.3.56.252/3110.3.56.252 – 10.3.56.25310.3.56.253
12810.3.56.254/3110.3.56.254 – 10.3.56.25510.3.56.255
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 →