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)10.78.91.0/24
network10.78.91.0/24
broadcast10.78.91.255
first host10.78.91.1
last host10.78.91.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.91.0/24
address00001010.01001110.01011011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.01011011.00000000
broadcast00001010.01001110.01011011.11111111
green = network part, grey = host part
hex0x0a4e5b00
decimal172907264
reverse dns0.91.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:5b00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.91.0/3110.78.91.0 – 10.78.91.110.78.91.1
210.78.91.2/3110.78.91.2 – 10.78.91.310.78.91.3
310.78.91.4/3110.78.91.4 – 10.78.91.510.78.91.5
410.78.91.6/3110.78.91.6 – 10.78.91.710.78.91.7
510.78.91.8/3110.78.91.8 – 10.78.91.910.78.91.9
610.78.91.10/3110.78.91.10 – 10.78.91.1110.78.91.11
710.78.91.12/3110.78.91.12 – 10.78.91.1310.78.91.13
810.78.91.14/3110.78.91.14 – 10.78.91.1510.78.91.15
910.78.91.16/3110.78.91.16 – 10.78.91.1710.78.91.17
1010.78.91.18/3110.78.91.18 – 10.78.91.1910.78.91.19
1110.78.91.20/3110.78.91.20 – 10.78.91.2110.78.91.21
1210.78.91.22/3110.78.91.22 – 10.78.91.2310.78.91.23
1310.78.91.24/3110.78.91.24 – 10.78.91.2510.78.91.25
1410.78.91.26/3110.78.91.26 – 10.78.91.2710.78.91.27
1510.78.91.28/3110.78.91.28 – 10.78.91.2910.78.91.29
1610.78.91.30/3110.78.91.30 – 10.78.91.3110.78.91.31
1710.78.91.32/3110.78.91.32 – 10.78.91.3310.78.91.33
1810.78.91.34/3110.78.91.34 – 10.78.91.3510.78.91.35
1910.78.91.36/3110.78.91.36 – 10.78.91.3710.78.91.37
2010.78.91.38/3110.78.91.38 – 10.78.91.3910.78.91.39
2110.78.91.40/3110.78.91.40 – 10.78.91.4110.78.91.41
2210.78.91.42/3110.78.91.42 – 10.78.91.4310.78.91.43
2310.78.91.44/3110.78.91.44 – 10.78.91.4510.78.91.45
2410.78.91.46/3110.78.91.46 – 10.78.91.4710.78.91.47
2510.78.91.48/3110.78.91.48 – 10.78.91.4910.78.91.49
2610.78.91.50/3110.78.91.50 – 10.78.91.5110.78.91.51
2710.78.91.52/3110.78.91.52 – 10.78.91.5310.78.91.53
2810.78.91.54/3110.78.91.54 – 10.78.91.5510.78.91.55
2910.78.91.56/3110.78.91.56 – 10.78.91.5710.78.91.57
3010.78.91.58/3110.78.91.58 – 10.78.91.5910.78.91.59
3110.78.91.60/3110.78.91.60 – 10.78.91.6110.78.91.61
3210.78.91.62/3110.78.91.62 – 10.78.91.6310.78.91.63
3310.78.91.64/3110.78.91.64 – 10.78.91.6510.78.91.65
3410.78.91.66/3110.78.91.66 – 10.78.91.6710.78.91.67
3510.78.91.68/3110.78.91.68 – 10.78.91.6910.78.91.69
3610.78.91.70/3110.78.91.70 – 10.78.91.7110.78.91.71
3710.78.91.72/3110.78.91.72 – 10.78.91.7310.78.91.73
3810.78.91.74/3110.78.91.74 – 10.78.91.7510.78.91.75
3910.78.91.76/3110.78.91.76 – 10.78.91.7710.78.91.77
4010.78.91.78/3110.78.91.78 – 10.78.91.7910.78.91.79
4110.78.91.80/3110.78.91.80 – 10.78.91.8110.78.91.81
4210.78.91.82/3110.78.91.82 – 10.78.91.8310.78.91.83
4310.78.91.84/3110.78.91.84 – 10.78.91.8510.78.91.85
4410.78.91.86/3110.78.91.86 – 10.78.91.8710.78.91.87
4510.78.91.88/3110.78.91.88 – 10.78.91.8910.78.91.89
4610.78.91.90/3110.78.91.90 – 10.78.91.9110.78.91.91
4710.78.91.92/3110.78.91.92 – 10.78.91.9310.78.91.93
4810.78.91.94/3110.78.91.94 – 10.78.91.9510.78.91.95
4910.78.91.96/3110.78.91.96 – 10.78.91.9710.78.91.97
5010.78.91.98/3110.78.91.98 – 10.78.91.9910.78.91.99
5110.78.91.100/3110.78.91.100 – 10.78.91.10110.78.91.101
5210.78.91.102/3110.78.91.102 – 10.78.91.10310.78.91.103
5310.78.91.104/3110.78.91.104 – 10.78.91.10510.78.91.105
5410.78.91.106/3110.78.91.106 – 10.78.91.10710.78.91.107
5510.78.91.108/3110.78.91.108 – 10.78.91.10910.78.91.109
5610.78.91.110/3110.78.91.110 – 10.78.91.11110.78.91.111
5710.78.91.112/3110.78.91.112 – 10.78.91.11310.78.91.113
5810.78.91.114/3110.78.91.114 – 10.78.91.11510.78.91.115
5910.78.91.116/3110.78.91.116 – 10.78.91.11710.78.91.117
6010.78.91.118/3110.78.91.118 – 10.78.91.11910.78.91.119
6110.78.91.120/3110.78.91.120 – 10.78.91.12110.78.91.121
6210.78.91.122/3110.78.91.122 – 10.78.91.12310.78.91.123
6310.78.91.124/3110.78.91.124 – 10.78.91.12510.78.91.125
6410.78.91.126/3110.78.91.126 – 10.78.91.12710.78.91.127
6510.78.91.128/3110.78.91.128 – 10.78.91.12910.78.91.129
6610.78.91.130/3110.78.91.130 – 10.78.91.13110.78.91.131
6710.78.91.132/3110.78.91.132 – 10.78.91.13310.78.91.133
6810.78.91.134/3110.78.91.134 – 10.78.91.13510.78.91.135
6910.78.91.136/3110.78.91.136 – 10.78.91.13710.78.91.137
7010.78.91.138/3110.78.91.138 – 10.78.91.13910.78.91.139
7110.78.91.140/3110.78.91.140 – 10.78.91.14110.78.91.141
7210.78.91.142/3110.78.91.142 – 10.78.91.14310.78.91.143
7310.78.91.144/3110.78.91.144 – 10.78.91.14510.78.91.145
7410.78.91.146/3110.78.91.146 – 10.78.91.14710.78.91.147
7510.78.91.148/3110.78.91.148 – 10.78.91.14910.78.91.149
7610.78.91.150/3110.78.91.150 – 10.78.91.15110.78.91.151
7710.78.91.152/3110.78.91.152 – 10.78.91.15310.78.91.153
7810.78.91.154/3110.78.91.154 – 10.78.91.15510.78.91.155
7910.78.91.156/3110.78.91.156 – 10.78.91.15710.78.91.157
8010.78.91.158/3110.78.91.158 – 10.78.91.15910.78.91.159
8110.78.91.160/3110.78.91.160 – 10.78.91.16110.78.91.161
8210.78.91.162/3110.78.91.162 – 10.78.91.16310.78.91.163
8310.78.91.164/3110.78.91.164 – 10.78.91.16510.78.91.165
8410.78.91.166/3110.78.91.166 – 10.78.91.16710.78.91.167
8510.78.91.168/3110.78.91.168 – 10.78.91.16910.78.91.169
8610.78.91.170/3110.78.91.170 – 10.78.91.17110.78.91.171
8710.78.91.172/3110.78.91.172 – 10.78.91.17310.78.91.173
8810.78.91.174/3110.78.91.174 – 10.78.91.17510.78.91.175
8910.78.91.176/3110.78.91.176 – 10.78.91.17710.78.91.177
9010.78.91.178/3110.78.91.178 – 10.78.91.17910.78.91.179
9110.78.91.180/3110.78.91.180 – 10.78.91.18110.78.91.181
9210.78.91.182/3110.78.91.182 – 10.78.91.18310.78.91.183
9310.78.91.184/3110.78.91.184 – 10.78.91.18510.78.91.185
9410.78.91.186/3110.78.91.186 – 10.78.91.18710.78.91.187
9510.78.91.188/3110.78.91.188 – 10.78.91.18910.78.91.189
9610.78.91.190/3110.78.91.190 – 10.78.91.19110.78.91.191
9710.78.91.192/3110.78.91.192 – 10.78.91.19310.78.91.193
9810.78.91.194/3110.78.91.194 – 10.78.91.19510.78.91.195
9910.78.91.196/3110.78.91.196 – 10.78.91.19710.78.91.197
10010.78.91.198/3110.78.91.198 – 10.78.91.19910.78.91.199
10110.78.91.200/3110.78.91.200 – 10.78.91.20110.78.91.201
10210.78.91.202/3110.78.91.202 – 10.78.91.20310.78.91.203
10310.78.91.204/3110.78.91.204 – 10.78.91.20510.78.91.205
10410.78.91.206/3110.78.91.206 – 10.78.91.20710.78.91.207
10510.78.91.208/3110.78.91.208 – 10.78.91.20910.78.91.209
10610.78.91.210/3110.78.91.210 – 10.78.91.21110.78.91.211
10710.78.91.212/3110.78.91.212 – 10.78.91.21310.78.91.213
10810.78.91.214/3110.78.91.214 – 10.78.91.21510.78.91.215
10910.78.91.216/3110.78.91.216 – 10.78.91.21710.78.91.217
11010.78.91.218/3110.78.91.218 – 10.78.91.21910.78.91.219
11110.78.91.220/3110.78.91.220 – 10.78.91.22110.78.91.221
11210.78.91.222/3110.78.91.222 – 10.78.91.22310.78.91.223
11310.78.91.224/3110.78.91.224 – 10.78.91.22510.78.91.225
11410.78.91.226/3110.78.91.226 – 10.78.91.22710.78.91.227
11510.78.91.228/3110.78.91.228 – 10.78.91.22910.78.91.229
11610.78.91.230/3110.78.91.230 – 10.78.91.23110.78.91.231
11710.78.91.232/3110.78.91.232 – 10.78.91.23310.78.91.233
11810.78.91.234/3110.78.91.234 – 10.78.91.23510.78.91.235
11910.78.91.236/3110.78.91.236 – 10.78.91.23710.78.91.237
12010.78.91.238/3110.78.91.238 – 10.78.91.23910.78.91.239
12110.78.91.240/3110.78.91.240 – 10.78.91.24110.78.91.241
12210.78.91.242/3110.78.91.242 – 10.78.91.24310.78.91.243
12310.78.91.244/3110.78.91.244 – 10.78.91.24510.78.91.245
12410.78.91.246/3110.78.91.246 – 10.78.91.24710.78.91.247
12510.78.91.248/3110.78.91.248 – 10.78.91.24910.78.91.249
12610.78.91.250/3110.78.91.250 – 10.78.91.25110.78.91.251
12710.78.91.252/3110.78.91.252 – 10.78.91.25310.78.91.253
12810.78.91.254/3110.78.91.254 – 10.78.91.25510.78.91.255
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 →