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)10.87.4.0/24
network10.87.4.0/24
broadcast10.87.4.255
first host10.87.4.1
last host10.87.4.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.87.4.0/24
address00001010.01010111.00000100.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01010111.00000100.00000000
broadcast00001010.01010111.00000100.11111111
green = network part, grey = host part
hex0x0a570400
decimal173474816
reverse dns0.4.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:400

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.4.0/3110.87.4.0 – 10.87.4.110.87.4.1
210.87.4.2/3110.87.4.2 – 10.87.4.310.87.4.3
310.87.4.4/3110.87.4.4 – 10.87.4.510.87.4.5
410.87.4.6/3110.87.4.6 – 10.87.4.710.87.4.7
510.87.4.8/3110.87.4.8 – 10.87.4.910.87.4.9
610.87.4.10/3110.87.4.10 – 10.87.4.1110.87.4.11
710.87.4.12/3110.87.4.12 – 10.87.4.1310.87.4.13
810.87.4.14/3110.87.4.14 – 10.87.4.1510.87.4.15
910.87.4.16/3110.87.4.16 – 10.87.4.1710.87.4.17
1010.87.4.18/3110.87.4.18 – 10.87.4.1910.87.4.19
1110.87.4.20/3110.87.4.20 – 10.87.4.2110.87.4.21
1210.87.4.22/3110.87.4.22 – 10.87.4.2310.87.4.23
1310.87.4.24/3110.87.4.24 – 10.87.4.2510.87.4.25
1410.87.4.26/3110.87.4.26 – 10.87.4.2710.87.4.27
1510.87.4.28/3110.87.4.28 – 10.87.4.2910.87.4.29
1610.87.4.30/3110.87.4.30 – 10.87.4.3110.87.4.31
1710.87.4.32/3110.87.4.32 – 10.87.4.3310.87.4.33
1810.87.4.34/3110.87.4.34 – 10.87.4.3510.87.4.35
1910.87.4.36/3110.87.4.36 – 10.87.4.3710.87.4.37
2010.87.4.38/3110.87.4.38 – 10.87.4.3910.87.4.39
2110.87.4.40/3110.87.4.40 – 10.87.4.4110.87.4.41
2210.87.4.42/3110.87.4.42 – 10.87.4.4310.87.4.43
2310.87.4.44/3110.87.4.44 – 10.87.4.4510.87.4.45
2410.87.4.46/3110.87.4.46 – 10.87.4.4710.87.4.47
2510.87.4.48/3110.87.4.48 – 10.87.4.4910.87.4.49
2610.87.4.50/3110.87.4.50 – 10.87.4.5110.87.4.51
2710.87.4.52/3110.87.4.52 – 10.87.4.5310.87.4.53
2810.87.4.54/3110.87.4.54 – 10.87.4.5510.87.4.55
2910.87.4.56/3110.87.4.56 – 10.87.4.5710.87.4.57
3010.87.4.58/3110.87.4.58 – 10.87.4.5910.87.4.59
3110.87.4.60/3110.87.4.60 – 10.87.4.6110.87.4.61
3210.87.4.62/3110.87.4.62 – 10.87.4.6310.87.4.63
3310.87.4.64/3110.87.4.64 – 10.87.4.6510.87.4.65
3410.87.4.66/3110.87.4.66 – 10.87.4.6710.87.4.67
3510.87.4.68/3110.87.4.68 – 10.87.4.6910.87.4.69
3610.87.4.70/3110.87.4.70 – 10.87.4.7110.87.4.71
3710.87.4.72/3110.87.4.72 – 10.87.4.7310.87.4.73
3810.87.4.74/3110.87.4.74 – 10.87.4.7510.87.4.75
3910.87.4.76/3110.87.4.76 – 10.87.4.7710.87.4.77
4010.87.4.78/3110.87.4.78 – 10.87.4.7910.87.4.79
4110.87.4.80/3110.87.4.80 – 10.87.4.8110.87.4.81
4210.87.4.82/3110.87.4.82 – 10.87.4.8310.87.4.83
4310.87.4.84/3110.87.4.84 – 10.87.4.8510.87.4.85
4410.87.4.86/3110.87.4.86 – 10.87.4.8710.87.4.87
4510.87.4.88/3110.87.4.88 – 10.87.4.8910.87.4.89
4610.87.4.90/3110.87.4.90 – 10.87.4.9110.87.4.91
4710.87.4.92/3110.87.4.92 – 10.87.4.9310.87.4.93
4810.87.4.94/3110.87.4.94 – 10.87.4.9510.87.4.95
4910.87.4.96/3110.87.4.96 – 10.87.4.9710.87.4.97
5010.87.4.98/3110.87.4.98 – 10.87.4.9910.87.4.99
5110.87.4.100/3110.87.4.100 – 10.87.4.10110.87.4.101
5210.87.4.102/3110.87.4.102 – 10.87.4.10310.87.4.103
5310.87.4.104/3110.87.4.104 – 10.87.4.10510.87.4.105
5410.87.4.106/3110.87.4.106 – 10.87.4.10710.87.4.107
5510.87.4.108/3110.87.4.108 – 10.87.4.10910.87.4.109
5610.87.4.110/3110.87.4.110 – 10.87.4.11110.87.4.111
5710.87.4.112/3110.87.4.112 – 10.87.4.11310.87.4.113
5810.87.4.114/3110.87.4.114 – 10.87.4.11510.87.4.115
5910.87.4.116/3110.87.4.116 – 10.87.4.11710.87.4.117
6010.87.4.118/3110.87.4.118 – 10.87.4.11910.87.4.119
6110.87.4.120/3110.87.4.120 – 10.87.4.12110.87.4.121
6210.87.4.122/3110.87.4.122 – 10.87.4.12310.87.4.123
6310.87.4.124/3110.87.4.124 – 10.87.4.12510.87.4.125
6410.87.4.126/3110.87.4.126 – 10.87.4.12710.87.4.127
6510.87.4.128/3110.87.4.128 – 10.87.4.12910.87.4.129
6610.87.4.130/3110.87.4.130 – 10.87.4.13110.87.4.131
6710.87.4.132/3110.87.4.132 – 10.87.4.13310.87.4.133
6810.87.4.134/3110.87.4.134 – 10.87.4.13510.87.4.135
6910.87.4.136/3110.87.4.136 – 10.87.4.13710.87.4.137
7010.87.4.138/3110.87.4.138 – 10.87.4.13910.87.4.139
7110.87.4.140/3110.87.4.140 – 10.87.4.14110.87.4.141
7210.87.4.142/3110.87.4.142 – 10.87.4.14310.87.4.143
7310.87.4.144/3110.87.4.144 – 10.87.4.14510.87.4.145
7410.87.4.146/3110.87.4.146 – 10.87.4.14710.87.4.147
7510.87.4.148/3110.87.4.148 – 10.87.4.14910.87.4.149
7610.87.4.150/3110.87.4.150 – 10.87.4.15110.87.4.151
7710.87.4.152/3110.87.4.152 – 10.87.4.15310.87.4.153
7810.87.4.154/3110.87.4.154 – 10.87.4.15510.87.4.155
7910.87.4.156/3110.87.4.156 – 10.87.4.15710.87.4.157
8010.87.4.158/3110.87.4.158 – 10.87.4.15910.87.4.159
8110.87.4.160/3110.87.4.160 – 10.87.4.16110.87.4.161
8210.87.4.162/3110.87.4.162 – 10.87.4.16310.87.4.163
8310.87.4.164/3110.87.4.164 – 10.87.4.16510.87.4.165
8410.87.4.166/3110.87.4.166 – 10.87.4.16710.87.4.167
8510.87.4.168/3110.87.4.168 – 10.87.4.16910.87.4.169
8610.87.4.170/3110.87.4.170 – 10.87.4.17110.87.4.171
8710.87.4.172/3110.87.4.172 – 10.87.4.17310.87.4.173
8810.87.4.174/3110.87.4.174 – 10.87.4.17510.87.4.175
8910.87.4.176/3110.87.4.176 – 10.87.4.17710.87.4.177
9010.87.4.178/3110.87.4.178 – 10.87.4.17910.87.4.179
9110.87.4.180/3110.87.4.180 – 10.87.4.18110.87.4.181
9210.87.4.182/3110.87.4.182 – 10.87.4.18310.87.4.183
9310.87.4.184/3110.87.4.184 – 10.87.4.18510.87.4.185
9410.87.4.186/3110.87.4.186 – 10.87.4.18710.87.4.187
9510.87.4.188/3110.87.4.188 – 10.87.4.18910.87.4.189
9610.87.4.190/3110.87.4.190 – 10.87.4.19110.87.4.191
9710.87.4.192/3110.87.4.192 – 10.87.4.19310.87.4.193
9810.87.4.194/3110.87.4.194 – 10.87.4.19510.87.4.195
9910.87.4.196/3110.87.4.196 – 10.87.4.19710.87.4.197
10010.87.4.198/3110.87.4.198 – 10.87.4.19910.87.4.199
10110.87.4.200/3110.87.4.200 – 10.87.4.20110.87.4.201
10210.87.4.202/3110.87.4.202 – 10.87.4.20310.87.4.203
10310.87.4.204/3110.87.4.204 – 10.87.4.20510.87.4.205
10410.87.4.206/3110.87.4.206 – 10.87.4.20710.87.4.207
10510.87.4.208/3110.87.4.208 – 10.87.4.20910.87.4.209
10610.87.4.210/3110.87.4.210 – 10.87.4.21110.87.4.211
10710.87.4.212/3110.87.4.212 – 10.87.4.21310.87.4.213
10810.87.4.214/3110.87.4.214 – 10.87.4.21510.87.4.215
10910.87.4.216/3110.87.4.216 – 10.87.4.21710.87.4.217
11010.87.4.218/3110.87.4.218 – 10.87.4.21910.87.4.219
11110.87.4.220/3110.87.4.220 – 10.87.4.22110.87.4.221
11210.87.4.222/3110.87.4.222 – 10.87.4.22310.87.4.223
11310.87.4.224/3110.87.4.224 – 10.87.4.22510.87.4.225
11410.87.4.226/3110.87.4.226 – 10.87.4.22710.87.4.227
11510.87.4.228/3110.87.4.228 – 10.87.4.22910.87.4.229
11610.87.4.230/3110.87.4.230 – 10.87.4.23110.87.4.231
11710.87.4.232/3110.87.4.232 – 10.87.4.23310.87.4.233
11810.87.4.234/3110.87.4.234 – 10.87.4.23510.87.4.235
11910.87.4.236/3110.87.4.236 – 10.87.4.23710.87.4.237
12010.87.4.238/3110.87.4.238 – 10.87.4.23910.87.4.239
12110.87.4.240/3110.87.4.240 – 10.87.4.24110.87.4.241
12210.87.4.242/3110.87.4.242 – 10.87.4.24310.87.4.243
12310.87.4.244/3110.87.4.244 – 10.87.4.24510.87.4.245
12410.87.4.246/3110.87.4.246 – 10.87.4.24710.87.4.247
12510.87.4.248/3110.87.4.248 – 10.87.4.24910.87.4.249
12610.87.4.250/3110.87.4.250 – 10.87.4.25110.87.4.251
12710.87.4.252/3110.87.4.252 – 10.87.4.25310.87.4.253
12810.87.4.254/3110.87.4.254 – 10.87.4.25510.87.4.255
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 →