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)10.87.89.0/24
network10.87.89.0/24
broadcast10.87.89.255
first host10.87.89.1
last host10.87.89.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.87.89.0/24
address00001010.01010111.01011001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01010111.01011001.00000000
broadcast00001010.01010111.01011001.11111111
green = network part, grey = host part
hex0x0a575900
decimal173496576
reverse dns0.89.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:5900

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.89.0/3110.87.89.0 – 10.87.89.110.87.89.1
210.87.89.2/3110.87.89.2 – 10.87.89.310.87.89.3
310.87.89.4/3110.87.89.4 – 10.87.89.510.87.89.5
410.87.89.6/3110.87.89.6 – 10.87.89.710.87.89.7
510.87.89.8/3110.87.89.8 – 10.87.89.910.87.89.9
610.87.89.10/3110.87.89.10 – 10.87.89.1110.87.89.11
710.87.89.12/3110.87.89.12 – 10.87.89.1310.87.89.13
810.87.89.14/3110.87.89.14 – 10.87.89.1510.87.89.15
910.87.89.16/3110.87.89.16 – 10.87.89.1710.87.89.17
1010.87.89.18/3110.87.89.18 – 10.87.89.1910.87.89.19
1110.87.89.20/3110.87.89.20 – 10.87.89.2110.87.89.21
1210.87.89.22/3110.87.89.22 – 10.87.89.2310.87.89.23
1310.87.89.24/3110.87.89.24 – 10.87.89.2510.87.89.25
1410.87.89.26/3110.87.89.26 – 10.87.89.2710.87.89.27
1510.87.89.28/3110.87.89.28 – 10.87.89.2910.87.89.29
1610.87.89.30/3110.87.89.30 – 10.87.89.3110.87.89.31
1710.87.89.32/3110.87.89.32 – 10.87.89.3310.87.89.33
1810.87.89.34/3110.87.89.34 – 10.87.89.3510.87.89.35
1910.87.89.36/3110.87.89.36 – 10.87.89.3710.87.89.37
2010.87.89.38/3110.87.89.38 – 10.87.89.3910.87.89.39
2110.87.89.40/3110.87.89.40 – 10.87.89.4110.87.89.41
2210.87.89.42/3110.87.89.42 – 10.87.89.4310.87.89.43
2310.87.89.44/3110.87.89.44 – 10.87.89.4510.87.89.45
2410.87.89.46/3110.87.89.46 – 10.87.89.4710.87.89.47
2510.87.89.48/3110.87.89.48 – 10.87.89.4910.87.89.49
2610.87.89.50/3110.87.89.50 – 10.87.89.5110.87.89.51
2710.87.89.52/3110.87.89.52 – 10.87.89.5310.87.89.53
2810.87.89.54/3110.87.89.54 – 10.87.89.5510.87.89.55
2910.87.89.56/3110.87.89.56 – 10.87.89.5710.87.89.57
3010.87.89.58/3110.87.89.58 – 10.87.89.5910.87.89.59
3110.87.89.60/3110.87.89.60 – 10.87.89.6110.87.89.61
3210.87.89.62/3110.87.89.62 – 10.87.89.6310.87.89.63
3310.87.89.64/3110.87.89.64 – 10.87.89.6510.87.89.65
3410.87.89.66/3110.87.89.66 – 10.87.89.6710.87.89.67
3510.87.89.68/3110.87.89.68 – 10.87.89.6910.87.89.69
3610.87.89.70/3110.87.89.70 – 10.87.89.7110.87.89.71
3710.87.89.72/3110.87.89.72 – 10.87.89.7310.87.89.73
3810.87.89.74/3110.87.89.74 – 10.87.89.7510.87.89.75
3910.87.89.76/3110.87.89.76 – 10.87.89.7710.87.89.77
4010.87.89.78/3110.87.89.78 – 10.87.89.7910.87.89.79
4110.87.89.80/3110.87.89.80 – 10.87.89.8110.87.89.81
4210.87.89.82/3110.87.89.82 – 10.87.89.8310.87.89.83
4310.87.89.84/3110.87.89.84 – 10.87.89.8510.87.89.85
4410.87.89.86/3110.87.89.86 – 10.87.89.8710.87.89.87
4510.87.89.88/3110.87.89.88 – 10.87.89.8910.87.89.89
4610.87.89.90/3110.87.89.90 – 10.87.89.9110.87.89.91
4710.87.89.92/3110.87.89.92 – 10.87.89.9310.87.89.93
4810.87.89.94/3110.87.89.94 – 10.87.89.9510.87.89.95
4910.87.89.96/3110.87.89.96 – 10.87.89.9710.87.89.97
5010.87.89.98/3110.87.89.98 – 10.87.89.9910.87.89.99
5110.87.89.100/3110.87.89.100 – 10.87.89.10110.87.89.101
5210.87.89.102/3110.87.89.102 – 10.87.89.10310.87.89.103
5310.87.89.104/3110.87.89.104 – 10.87.89.10510.87.89.105
5410.87.89.106/3110.87.89.106 – 10.87.89.10710.87.89.107
5510.87.89.108/3110.87.89.108 – 10.87.89.10910.87.89.109
5610.87.89.110/3110.87.89.110 – 10.87.89.11110.87.89.111
5710.87.89.112/3110.87.89.112 – 10.87.89.11310.87.89.113
5810.87.89.114/3110.87.89.114 – 10.87.89.11510.87.89.115
5910.87.89.116/3110.87.89.116 – 10.87.89.11710.87.89.117
6010.87.89.118/3110.87.89.118 – 10.87.89.11910.87.89.119
6110.87.89.120/3110.87.89.120 – 10.87.89.12110.87.89.121
6210.87.89.122/3110.87.89.122 – 10.87.89.12310.87.89.123
6310.87.89.124/3110.87.89.124 – 10.87.89.12510.87.89.125
6410.87.89.126/3110.87.89.126 – 10.87.89.12710.87.89.127
6510.87.89.128/3110.87.89.128 – 10.87.89.12910.87.89.129
6610.87.89.130/3110.87.89.130 – 10.87.89.13110.87.89.131
6710.87.89.132/3110.87.89.132 – 10.87.89.13310.87.89.133
6810.87.89.134/3110.87.89.134 – 10.87.89.13510.87.89.135
6910.87.89.136/3110.87.89.136 – 10.87.89.13710.87.89.137
7010.87.89.138/3110.87.89.138 – 10.87.89.13910.87.89.139
7110.87.89.140/3110.87.89.140 – 10.87.89.14110.87.89.141
7210.87.89.142/3110.87.89.142 – 10.87.89.14310.87.89.143
7310.87.89.144/3110.87.89.144 – 10.87.89.14510.87.89.145
7410.87.89.146/3110.87.89.146 – 10.87.89.14710.87.89.147
7510.87.89.148/3110.87.89.148 – 10.87.89.14910.87.89.149
7610.87.89.150/3110.87.89.150 – 10.87.89.15110.87.89.151
7710.87.89.152/3110.87.89.152 – 10.87.89.15310.87.89.153
7810.87.89.154/3110.87.89.154 – 10.87.89.15510.87.89.155
7910.87.89.156/3110.87.89.156 – 10.87.89.15710.87.89.157
8010.87.89.158/3110.87.89.158 – 10.87.89.15910.87.89.159
8110.87.89.160/3110.87.89.160 – 10.87.89.16110.87.89.161
8210.87.89.162/3110.87.89.162 – 10.87.89.16310.87.89.163
8310.87.89.164/3110.87.89.164 – 10.87.89.16510.87.89.165
8410.87.89.166/3110.87.89.166 – 10.87.89.16710.87.89.167
8510.87.89.168/3110.87.89.168 – 10.87.89.16910.87.89.169
8610.87.89.170/3110.87.89.170 – 10.87.89.17110.87.89.171
8710.87.89.172/3110.87.89.172 – 10.87.89.17310.87.89.173
8810.87.89.174/3110.87.89.174 – 10.87.89.17510.87.89.175
8910.87.89.176/3110.87.89.176 – 10.87.89.17710.87.89.177
9010.87.89.178/3110.87.89.178 – 10.87.89.17910.87.89.179
9110.87.89.180/3110.87.89.180 – 10.87.89.18110.87.89.181
9210.87.89.182/3110.87.89.182 – 10.87.89.18310.87.89.183
9310.87.89.184/3110.87.89.184 – 10.87.89.18510.87.89.185
9410.87.89.186/3110.87.89.186 – 10.87.89.18710.87.89.187
9510.87.89.188/3110.87.89.188 – 10.87.89.18910.87.89.189
9610.87.89.190/3110.87.89.190 – 10.87.89.19110.87.89.191
9710.87.89.192/3110.87.89.192 – 10.87.89.19310.87.89.193
9810.87.89.194/3110.87.89.194 – 10.87.89.19510.87.89.195
9910.87.89.196/3110.87.89.196 – 10.87.89.19710.87.89.197
10010.87.89.198/3110.87.89.198 – 10.87.89.19910.87.89.199
10110.87.89.200/3110.87.89.200 – 10.87.89.20110.87.89.201
10210.87.89.202/3110.87.89.202 – 10.87.89.20310.87.89.203
10310.87.89.204/3110.87.89.204 – 10.87.89.20510.87.89.205
10410.87.89.206/3110.87.89.206 – 10.87.89.20710.87.89.207
10510.87.89.208/3110.87.89.208 – 10.87.89.20910.87.89.209
10610.87.89.210/3110.87.89.210 – 10.87.89.21110.87.89.211
10710.87.89.212/3110.87.89.212 – 10.87.89.21310.87.89.213
10810.87.89.214/3110.87.89.214 – 10.87.89.21510.87.89.215
10910.87.89.216/3110.87.89.216 – 10.87.89.21710.87.89.217
11010.87.89.218/3110.87.89.218 – 10.87.89.21910.87.89.219
11110.87.89.220/3110.87.89.220 – 10.87.89.22110.87.89.221
11210.87.89.222/3110.87.89.222 – 10.87.89.22310.87.89.223
11310.87.89.224/3110.87.89.224 – 10.87.89.22510.87.89.225
11410.87.89.226/3110.87.89.226 – 10.87.89.22710.87.89.227
11510.87.89.228/3110.87.89.228 – 10.87.89.22910.87.89.229
11610.87.89.230/3110.87.89.230 – 10.87.89.23110.87.89.231
11710.87.89.232/3110.87.89.232 – 10.87.89.23310.87.89.233
11810.87.89.234/3110.87.89.234 – 10.87.89.23510.87.89.235
11910.87.89.236/3110.87.89.236 – 10.87.89.23710.87.89.237
12010.87.89.238/3110.87.89.238 – 10.87.89.23910.87.89.239
12110.87.89.240/3110.87.89.240 – 10.87.89.24110.87.89.241
12210.87.89.242/3110.87.89.242 – 10.87.89.24310.87.89.243
12310.87.89.244/3110.87.89.244 – 10.87.89.24510.87.89.245
12410.87.89.246/3110.87.89.246 – 10.87.89.24710.87.89.247
12510.87.89.248/3110.87.89.248 – 10.87.89.24910.87.89.249
12610.87.89.250/3110.87.89.250 – 10.87.89.25110.87.89.251
12710.87.89.252/3110.87.89.252 – 10.87.89.25310.87.89.253
12810.87.89.254/3110.87.89.254 – 10.87.89.25510.87.89.255
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 →