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)10.87.63.0/24
network10.87.63.0/24
broadcast10.87.63.255
first host10.87.63.1
last host10.87.63.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.87.63.0/24
address00001010.01010111.00111111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01010111.00111111.00000000
broadcast00001010.01010111.00111111.11111111
green = network part, grey = host part
hex0x0a573f00
decimal173489920
reverse dns0.63.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:3f00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.63.0/3110.87.63.0 – 10.87.63.110.87.63.1
210.87.63.2/3110.87.63.2 – 10.87.63.310.87.63.3
310.87.63.4/3110.87.63.4 – 10.87.63.510.87.63.5
410.87.63.6/3110.87.63.6 – 10.87.63.710.87.63.7
510.87.63.8/3110.87.63.8 – 10.87.63.910.87.63.9
610.87.63.10/3110.87.63.10 – 10.87.63.1110.87.63.11
710.87.63.12/3110.87.63.12 – 10.87.63.1310.87.63.13
810.87.63.14/3110.87.63.14 – 10.87.63.1510.87.63.15
910.87.63.16/3110.87.63.16 – 10.87.63.1710.87.63.17
1010.87.63.18/3110.87.63.18 – 10.87.63.1910.87.63.19
1110.87.63.20/3110.87.63.20 – 10.87.63.2110.87.63.21
1210.87.63.22/3110.87.63.22 – 10.87.63.2310.87.63.23
1310.87.63.24/3110.87.63.24 – 10.87.63.2510.87.63.25
1410.87.63.26/3110.87.63.26 – 10.87.63.2710.87.63.27
1510.87.63.28/3110.87.63.28 – 10.87.63.2910.87.63.29
1610.87.63.30/3110.87.63.30 – 10.87.63.3110.87.63.31
1710.87.63.32/3110.87.63.32 – 10.87.63.3310.87.63.33
1810.87.63.34/3110.87.63.34 – 10.87.63.3510.87.63.35
1910.87.63.36/3110.87.63.36 – 10.87.63.3710.87.63.37
2010.87.63.38/3110.87.63.38 – 10.87.63.3910.87.63.39
2110.87.63.40/3110.87.63.40 – 10.87.63.4110.87.63.41
2210.87.63.42/3110.87.63.42 – 10.87.63.4310.87.63.43
2310.87.63.44/3110.87.63.44 – 10.87.63.4510.87.63.45
2410.87.63.46/3110.87.63.46 – 10.87.63.4710.87.63.47
2510.87.63.48/3110.87.63.48 – 10.87.63.4910.87.63.49
2610.87.63.50/3110.87.63.50 – 10.87.63.5110.87.63.51
2710.87.63.52/3110.87.63.52 – 10.87.63.5310.87.63.53
2810.87.63.54/3110.87.63.54 – 10.87.63.5510.87.63.55
2910.87.63.56/3110.87.63.56 – 10.87.63.5710.87.63.57
3010.87.63.58/3110.87.63.58 – 10.87.63.5910.87.63.59
3110.87.63.60/3110.87.63.60 – 10.87.63.6110.87.63.61
3210.87.63.62/3110.87.63.62 – 10.87.63.6310.87.63.63
3310.87.63.64/3110.87.63.64 – 10.87.63.6510.87.63.65
3410.87.63.66/3110.87.63.66 – 10.87.63.6710.87.63.67
3510.87.63.68/3110.87.63.68 – 10.87.63.6910.87.63.69
3610.87.63.70/3110.87.63.70 – 10.87.63.7110.87.63.71
3710.87.63.72/3110.87.63.72 – 10.87.63.7310.87.63.73
3810.87.63.74/3110.87.63.74 – 10.87.63.7510.87.63.75
3910.87.63.76/3110.87.63.76 – 10.87.63.7710.87.63.77
4010.87.63.78/3110.87.63.78 – 10.87.63.7910.87.63.79
4110.87.63.80/3110.87.63.80 – 10.87.63.8110.87.63.81
4210.87.63.82/3110.87.63.82 – 10.87.63.8310.87.63.83
4310.87.63.84/3110.87.63.84 – 10.87.63.8510.87.63.85
4410.87.63.86/3110.87.63.86 – 10.87.63.8710.87.63.87
4510.87.63.88/3110.87.63.88 – 10.87.63.8910.87.63.89
4610.87.63.90/3110.87.63.90 – 10.87.63.9110.87.63.91
4710.87.63.92/3110.87.63.92 – 10.87.63.9310.87.63.93
4810.87.63.94/3110.87.63.94 – 10.87.63.9510.87.63.95
4910.87.63.96/3110.87.63.96 – 10.87.63.9710.87.63.97
5010.87.63.98/3110.87.63.98 – 10.87.63.9910.87.63.99
5110.87.63.100/3110.87.63.100 – 10.87.63.10110.87.63.101
5210.87.63.102/3110.87.63.102 – 10.87.63.10310.87.63.103
5310.87.63.104/3110.87.63.104 – 10.87.63.10510.87.63.105
5410.87.63.106/3110.87.63.106 – 10.87.63.10710.87.63.107
5510.87.63.108/3110.87.63.108 – 10.87.63.10910.87.63.109
5610.87.63.110/3110.87.63.110 – 10.87.63.11110.87.63.111
5710.87.63.112/3110.87.63.112 – 10.87.63.11310.87.63.113
5810.87.63.114/3110.87.63.114 – 10.87.63.11510.87.63.115
5910.87.63.116/3110.87.63.116 – 10.87.63.11710.87.63.117
6010.87.63.118/3110.87.63.118 – 10.87.63.11910.87.63.119
6110.87.63.120/3110.87.63.120 – 10.87.63.12110.87.63.121
6210.87.63.122/3110.87.63.122 – 10.87.63.12310.87.63.123
6310.87.63.124/3110.87.63.124 – 10.87.63.12510.87.63.125
6410.87.63.126/3110.87.63.126 – 10.87.63.12710.87.63.127
6510.87.63.128/3110.87.63.128 – 10.87.63.12910.87.63.129
6610.87.63.130/3110.87.63.130 – 10.87.63.13110.87.63.131
6710.87.63.132/3110.87.63.132 – 10.87.63.13310.87.63.133
6810.87.63.134/3110.87.63.134 – 10.87.63.13510.87.63.135
6910.87.63.136/3110.87.63.136 – 10.87.63.13710.87.63.137
7010.87.63.138/3110.87.63.138 – 10.87.63.13910.87.63.139
7110.87.63.140/3110.87.63.140 – 10.87.63.14110.87.63.141
7210.87.63.142/3110.87.63.142 – 10.87.63.14310.87.63.143
7310.87.63.144/3110.87.63.144 – 10.87.63.14510.87.63.145
7410.87.63.146/3110.87.63.146 – 10.87.63.14710.87.63.147
7510.87.63.148/3110.87.63.148 – 10.87.63.14910.87.63.149
7610.87.63.150/3110.87.63.150 – 10.87.63.15110.87.63.151
7710.87.63.152/3110.87.63.152 – 10.87.63.15310.87.63.153
7810.87.63.154/3110.87.63.154 – 10.87.63.15510.87.63.155
7910.87.63.156/3110.87.63.156 – 10.87.63.15710.87.63.157
8010.87.63.158/3110.87.63.158 – 10.87.63.15910.87.63.159
8110.87.63.160/3110.87.63.160 – 10.87.63.16110.87.63.161
8210.87.63.162/3110.87.63.162 – 10.87.63.16310.87.63.163
8310.87.63.164/3110.87.63.164 – 10.87.63.16510.87.63.165
8410.87.63.166/3110.87.63.166 – 10.87.63.16710.87.63.167
8510.87.63.168/3110.87.63.168 – 10.87.63.16910.87.63.169
8610.87.63.170/3110.87.63.170 – 10.87.63.17110.87.63.171
8710.87.63.172/3110.87.63.172 – 10.87.63.17310.87.63.173
8810.87.63.174/3110.87.63.174 – 10.87.63.17510.87.63.175
8910.87.63.176/3110.87.63.176 – 10.87.63.17710.87.63.177
9010.87.63.178/3110.87.63.178 – 10.87.63.17910.87.63.179
9110.87.63.180/3110.87.63.180 – 10.87.63.18110.87.63.181
9210.87.63.182/3110.87.63.182 – 10.87.63.18310.87.63.183
9310.87.63.184/3110.87.63.184 – 10.87.63.18510.87.63.185
9410.87.63.186/3110.87.63.186 – 10.87.63.18710.87.63.187
9510.87.63.188/3110.87.63.188 – 10.87.63.18910.87.63.189
9610.87.63.190/3110.87.63.190 – 10.87.63.19110.87.63.191
9710.87.63.192/3110.87.63.192 – 10.87.63.19310.87.63.193
9810.87.63.194/3110.87.63.194 – 10.87.63.19510.87.63.195
9910.87.63.196/3110.87.63.196 – 10.87.63.19710.87.63.197
10010.87.63.198/3110.87.63.198 – 10.87.63.19910.87.63.199
10110.87.63.200/3110.87.63.200 – 10.87.63.20110.87.63.201
10210.87.63.202/3110.87.63.202 – 10.87.63.20310.87.63.203
10310.87.63.204/3110.87.63.204 – 10.87.63.20510.87.63.205
10410.87.63.206/3110.87.63.206 – 10.87.63.20710.87.63.207
10510.87.63.208/3110.87.63.208 – 10.87.63.20910.87.63.209
10610.87.63.210/3110.87.63.210 – 10.87.63.21110.87.63.211
10710.87.63.212/3110.87.63.212 – 10.87.63.21310.87.63.213
10810.87.63.214/3110.87.63.214 – 10.87.63.21510.87.63.215
10910.87.63.216/3110.87.63.216 – 10.87.63.21710.87.63.217
11010.87.63.218/3110.87.63.218 – 10.87.63.21910.87.63.219
11110.87.63.220/3110.87.63.220 – 10.87.63.22110.87.63.221
11210.87.63.222/3110.87.63.222 – 10.87.63.22310.87.63.223
11310.87.63.224/3110.87.63.224 – 10.87.63.22510.87.63.225
11410.87.63.226/3110.87.63.226 – 10.87.63.22710.87.63.227
11510.87.63.228/3110.87.63.228 – 10.87.63.22910.87.63.229
11610.87.63.230/3110.87.63.230 – 10.87.63.23110.87.63.231
11710.87.63.232/3110.87.63.232 – 10.87.63.23310.87.63.233
11810.87.63.234/3110.87.63.234 – 10.87.63.23510.87.63.235
11910.87.63.236/3110.87.63.236 – 10.87.63.23710.87.63.237
12010.87.63.238/3110.87.63.238 – 10.87.63.23910.87.63.239
12110.87.63.240/3110.87.63.240 – 10.87.63.24110.87.63.241
12210.87.63.242/3110.87.63.242 – 10.87.63.24310.87.63.243
12310.87.63.244/3110.87.63.244 – 10.87.63.24510.87.63.245
12410.87.63.246/3110.87.63.246 – 10.87.63.24710.87.63.247
12510.87.63.248/3110.87.63.248 – 10.87.63.24910.87.63.249
12610.87.63.250/3110.87.63.250 – 10.87.63.25110.87.63.251
12710.87.63.252/3110.87.63.252 – 10.87.63.25310.87.63.253
12810.87.63.254/3110.87.63.254 – 10.87.63.25510.87.63.255
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 →