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)10.37.2.0/24
network10.37.2.0/24
broadcast10.37.2.255
first host10.37.2.1
last host10.37.2.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.37.2.0/24
address00001010.00100101.00000010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00100101.00000010.00000000
broadcast00001010.00100101.00000010.11111111
green = network part, grey = host part
hex0x0a250200
decimal170197504
reverse dns0.2.37.10.in-addr.arpa
ipv4-mapped::ffff:a25:200

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.37.2.0/3110.37.2.0 – 10.37.2.110.37.2.1
210.37.2.2/3110.37.2.2 – 10.37.2.310.37.2.3
310.37.2.4/3110.37.2.4 – 10.37.2.510.37.2.5
410.37.2.6/3110.37.2.6 – 10.37.2.710.37.2.7
510.37.2.8/3110.37.2.8 – 10.37.2.910.37.2.9
610.37.2.10/3110.37.2.10 – 10.37.2.1110.37.2.11
710.37.2.12/3110.37.2.12 – 10.37.2.1310.37.2.13
810.37.2.14/3110.37.2.14 – 10.37.2.1510.37.2.15
910.37.2.16/3110.37.2.16 – 10.37.2.1710.37.2.17
1010.37.2.18/3110.37.2.18 – 10.37.2.1910.37.2.19
1110.37.2.20/3110.37.2.20 – 10.37.2.2110.37.2.21
1210.37.2.22/3110.37.2.22 – 10.37.2.2310.37.2.23
1310.37.2.24/3110.37.2.24 – 10.37.2.2510.37.2.25
1410.37.2.26/3110.37.2.26 – 10.37.2.2710.37.2.27
1510.37.2.28/3110.37.2.28 – 10.37.2.2910.37.2.29
1610.37.2.30/3110.37.2.30 – 10.37.2.3110.37.2.31
1710.37.2.32/3110.37.2.32 – 10.37.2.3310.37.2.33
1810.37.2.34/3110.37.2.34 – 10.37.2.3510.37.2.35
1910.37.2.36/3110.37.2.36 – 10.37.2.3710.37.2.37
2010.37.2.38/3110.37.2.38 – 10.37.2.3910.37.2.39
2110.37.2.40/3110.37.2.40 – 10.37.2.4110.37.2.41
2210.37.2.42/3110.37.2.42 – 10.37.2.4310.37.2.43
2310.37.2.44/3110.37.2.44 – 10.37.2.4510.37.2.45
2410.37.2.46/3110.37.2.46 – 10.37.2.4710.37.2.47
2510.37.2.48/3110.37.2.48 – 10.37.2.4910.37.2.49
2610.37.2.50/3110.37.2.50 – 10.37.2.5110.37.2.51
2710.37.2.52/3110.37.2.52 – 10.37.2.5310.37.2.53
2810.37.2.54/3110.37.2.54 – 10.37.2.5510.37.2.55
2910.37.2.56/3110.37.2.56 – 10.37.2.5710.37.2.57
3010.37.2.58/3110.37.2.58 – 10.37.2.5910.37.2.59
3110.37.2.60/3110.37.2.60 – 10.37.2.6110.37.2.61
3210.37.2.62/3110.37.2.62 – 10.37.2.6310.37.2.63
3310.37.2.64/3110.37.2.64 – 10.37.2.6510.37.2.65
3410.37.2.66/3110.37.2.66 – 10.37.2.6710.37.2.67
3510.37.2.68/3110.37.2.68 – 10.37.2.6910.37.2.69
3610.37.2.70/3110.37.2.70 – 10.37.2.7110.37.2.71
3710.37.2.72/3110.37.2.72 – 10.37.2.7310.37.2.73
3810.37.2.74/3110.37.2.74 – 10.37.2.7510.37.2.75
3910.37.2.76/3110.37.2.76 – 10.37.2.7710.37.2.77
4010.37.2.78/3110.37.2.78 – 10.37.2.7910.37.2.79
4110.37.2.80/3110.37.2.80 – 10.37.2.8110.37.2.81
4210.37.2.82/3110.37.2.82 – 10.37.2.8310.37.2.83
4310.37.2.84/3110.37.2.84 – 10.37.2.8510.37.2.85
4410.37.2.86/3110.37.2.86 – 10.37.2.8710.37.2.87
4510.37.2.88/3110.37.2.88 – 10.37.2.8910.37.2.89
4610.37.2.90/3110.37.2.90 – 10.37.2.9110.37.2.91
4710.37.2.92/3110.37.2.92 – 10.37.2.9310.37.2.93
4810.37.2.94/3110.37.2.94 – 10.37.2.9510.37.2.95
4910.37.2.96/3110.37.2.96 – 10.37.2.9710.37.2.97
5010.37.2.98/3110.37.2.98 – 10.37.2.9910.37.2.99
5110.37.2.100/3110.37.2.100 – 10.37.2.10110.37.2.101
5210.37.2.102/3110.37.2.102 – 10.37.2.10310.37.2.103
5310.37.2.104/3110.37.2.104 – 10.37.2.10510.37.2.105
5410.37.2.106/3110.37.2.106 – 10.37.2.10710.37.2.107
5510.37.2.108/3110.37.2.108 – 10.37.2.10910.37.2.109
5610.37.2.110/3110.37.2.110 – 10.37.2.11110.37.2.111
5710.37.2.112/3110.37.2.112 – 10.37.2.11310.37.2.113
5810.37.2.114/3110.37.2.114 – 10.37.2.11510.37.2.115
5910.37.2.116/3110.37.2.116 – 10.37.2.11710.37.2.117
6010.37.2.118/3110.37.2.118 – 10.37.2.11910.37.2.119
6110.37.2.120/3110.37.2.120 – 10.37.2.12110.37.2.121
6210.37.2.122/3110.37.2.122 – 10.37.2.12310.37.2.123
6310.37.2.124/3110.37.2.124 – 10.37.2.12510.37.2.125
6410.37.2.126/3110.37.2.126 – 10.37.2.12710.37.2.127
6510.37.2.128/3110.37.2.128 – 10.37.2.12910.37.2.129
6610.37.2.130/3110.37.2.130 – 10.37.2.13110.37.2.131
6710.37.2.132/3110.37.2.132 – 10.37.2.13310.37.2.133
6810.37.2.134/3110.37.2.134 – 10.37.2.13510.37.2.135
6910.37.2.136/3110.37.2.136 – 10.37.2.13710.37.2.137
7010.37.2.138/3110.37.2.138 – 10.37.2.13910.37.2.139
7110.37.2.140/3110.37.2.140 – 10.37.2.14110.37.2.141
7210.37.2.142/3110.37.2.142 – 10.37.2.14310.37.2.143
7310.37.2.144/3110.37.2.144 – 10.37.2.14510.37.2.145
7410.37.2.146/3110.37.2.146 – 10.37.2.14710.37.2.147
7510.37.2.148/3110.37.2.148 – 10.37.2.14910.37.2.149
7610.37.2.150/3110.37.2.150 – 10.37.2.15110.37.2.151
7710.37.2.152/3110.37.2.152 – 10.37.2.15310.37.2.153
7810.37.2.154/3110.37.2.154 – 10.37.2.15510.37.2.155
7910.37.2.156/3110.37.2.156 – 10.37.2.15710.37.2.157
8010.37.2.158/3110.37.2.158 – 10.37.2.15910.37.2.159
8110.37.2.160/3110.37.2.160 – 10.37.2.16110.37.2.161
8210.37.2.162/3110.37.2.162 – 10.37.2.16310.37.2.163
8310.37.2.164/3110.37.2.164 – 10.37.2.16510.37.2.165
8410.37.2.166/3110.37.2.166 – 10.37.2.16710.37.2.167
8510.37.2.168/3110.37.2.168 – 10.37.2.16910.37.2.169
8610.37.2.170/3110.37.2.170 – 10.37.2.17110.37.2.171
8710.37.2.172/3110.37.2.172 – 10.37.2.17310.37.2.173
8810.37.2.174/3110.37.2.174 – 10.37.2.17510.37.2.175
8910.37.2.176/3110.37.2.176 – 10.37.2.17710.37.2.177
9010.37.2.178/3110.37.2.178 – 10.37.2.17910.37.2.179
9110.37.2.180/3110.37.2.180 – 10.37.2.18110.37.2.181
9210.37.2.182/3110.37.2.182 – 10.37.2.18310.37.2.183
9310.37.2.184/3110.37.2.184 – 10.37.2.18510.37.2.185
9410.37.2.186/3110.37.2.186 – 10.37.2.18710.37.2.187
9510.37.2.188/3110.37.2.188 – 10.37.2.18910.37.2.189
9610.37.2.190/3110.37.2.190 – 10.37.2.19110.37.2.191
9710.37.2.192/3110.37.2.192 – 10.37.2.19310.37.2.193
9810.37.2.194/3110.37.2.194 – 10.37.2.19510.37.2.195
9910.37.2.196/3110.37.2.196 – 10.37.2.19710.37.2.197
10010.37.2.198/3110.37.2.198 – 10.37.2.19910.37.2.199
10110.37.2.200/3110.37.2.200 – 10.37.2.20110.37.2.201
10210.37.2.202/3110.37.2.202 – 10.37.2.20310.37.2.203
10310.37.2.204/3110.37.2.204 – 10.37.2.20510.37.2.205
10410.37.2.206/3110.37.2.206 – 10.37.2.20710.37.2.207
10510.37.2.208/3110.37.2.208 – 10.37.2.20910.37.2.209
10610.37.2.210/3110.37.2.210 – 10.37.2.21110.37.2.211
10710.37.2.212/3110.37.2.212 – 10.37.2.21310.37.2.213
10810.37.2.214/3110.37.2.214 – 10.37.2.21510.37.2.215
10910.37.2.216/3110.37.2.216 – 10.37.2.21710.37.2.217
11010.37.2.218/3110.37.2.218 – 10.37.2.21910.37.2.219
11110.37.2.220/3110.37.2.220 – 10.37.2.22110.37.2.221
11210.37.2.222/3110.37.2.222 – 10.37.2.22310.37.2.223
11310.37.2.224/3110.37.2.224 – 10.37.2.22510.37.2.225
11410.37.2.226/3110.37.2.226 – 10.37.2.22710.37.2.227
11510.37.2.228/3110.37.2.228 – 10.37.2.22910.37.2.229
11610.37.2.230/3110.37.2.230 – 10.37.2.23110.37.2.231
11710.37.2.232/3110.37.2.232 – 10.37.2.23310.37.2.233
11810.37.2.234/3110.37.2.234 – 10.37.2.23510.37.2.235
11910.37.2.236/3110.37.2.236 – 10.37.2.23710.37.2.237
12010.37.2.238/3110.37.2.238 – 10.37.2.23910.37.2.239
12110.37.2.240/3110.37.2.240 – 10.37.2.24110.37.2.241
12210.37.2.242/3110.37.2.242 – 10.37.2.24310.37.2.243
12310.37.2.244/3110.37.2.244 – 10.37.2.24510.37.2.245
12410.37.2.246/3110.37.2.246 – 10.37.2.24710.37.2.247
12510.37.2.248/3110.37.2.248 – 10.37.2.24910.37.2.249
12610.37.2.250/3110.37.2.250 – 10.37.2.25110.37.2.251
12710.37.2.252/3110.37.2.252 – 10.37.2.25310.37.2.253
12810.37.2.254/3110.37.2.254 – 10.37.2.25510.37.2.255
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 →