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)10.78.181.0/24
network10.78.181.0/24
broadcast10.78.181.255
first host10.78.181.1
last host10.78.181.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.181.0/24
address00001010.01001110.10110101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.10110101.00000000
broadcast00001010.01001110.10110101.11111111
green = network part, grey = host part
hex0x0a4eb500
decimal172930304
reverse dns0.181.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:b500

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.181.0/3110.78.181.0 – 10.78.181.110.78.181.1
210.78.181.2/3110.78.181.2 – 10.78.181.310.78.181.3
310.78.181.4/3110.78.181.4 – 10.78.181.510.78.181.5
410.78.181.6/3110.78.181.6 – 10.78.181.710.78.181.7
510.78.181.8/3110.78.181.8 – 10.78.181.910.78.181.9
610.78.181.10/3110.78.181.10 – 10.78.181.1110.78.181.11
710.78.181.12/3110.78.181.12 – 10.78.181.1310.78.181.13
810.78.181.14/3110.78.181.14 – 10.78.181.1510.78.181.15
910.78.181.16/3110.78.181.16 – 10.78.181.1710.78.181.17
1010.78.181.18/3110.78.181.18 – 10.78.181.1910.78.181.19
1110.78.181.20/3110.78.181.20 – 10.78.181.2110.78.181.21
1210.78.181.22/3110.78.181.22 – 10.78.181.2310.78.181.23
1310.78.181.24/3110.78.181.24 – 10.78.181.2510.78.181.25
1410.78.181.26/3110.78.181.26 – 10.78.181.2710.78.181.27
1510.78.181.28/3110.78.181.28 – 10.78.181.2910.78.181.29
1610.78.181.30/3110.78.181.30 – 10.78.181.3110.78.181.31
1710.78.181.32/3110.78.181.32 – 10.78.181.3310.78.181.33
1810.78.181.34/3110.78.181.34 – 10.78.181.3510.78.181.35
1910.78.181.36/3110.78.181.36 – 10.78.181.3710.78.181.37
2010.78.181.38/3110.78.181.38 – 10.78.181.3910.78.181.39
2110.78.181.40/3110.78.181.40 – 10.78.181.4110.78.181.41
2210.78.181.42/3110.78.181.42 – 10.78.181.4310.78.181.43
2310.78.181.44/3110.78.181.44 – 10.78.181.4510.78.181.45
2410.78.181.46/3110.78.181.46 – 10.78.181.4710.78.181.47
2510.78.181.48/3110.78.181.48 – 10.78.181.4910.78.181.49
2610.78.181.50/3110.78.181.50 – 10.78.181.5110.78.181.51
2710.78.181.52/3110.78.181.52 – 10.78.181.5310.78.181.53
2810.78.181.54/3110.78.181.54 – 10.78.181.5510.78.181.55
2910.78.181.56/3110.78.181.56 – 10.78.181.5710.78.181.57
3010.78.181.58/3110.78.181.58 – 10.78.181.5910.78.181.59
3110.78.181.60/3110.78.181.60 – 10.78.181.6110.78.181.61
3210.78.181.62/3110.78.181.62 – 10.78.181.6310.78.181.63
3310.78.181.64/3110.78.181.64 – 10.78.181.6510.78.181.65
3410.78.181.66/3110.78.181.66 – 10.78.181.6710.78.181.67
3510.78.181.68/3110.78.181.68 – 10.78.181.6910.78.181.69
3610.78.181.70/3110.78.181.70 – 10.78.181.7110.78.181.71
3710.78.181.72/3110.78.181.72 – 10.78.181.7310.78.181.73
3810.78.181.74/3110.78.181.74 – 10.78.181.7510.78.181.75
3910.78.181.76/3110.78.181.76 – 10.78.181.7710.78.181.77
4010.78.181.78/3110.78.181.78 – 10.78.181.7910.78.181.79
4110.78.181.80/3110.78.181.80 – 10.78.181.8110.78.181.81
4210.78.181.82/3110.78.181.82 – 10.78.181.8310.78.181.83
4310.78.181.84/3110.78.181.84 – 10.78.181.8510.78.181.85
4410.78.181.86/3110.78.181.86 – 10.78.181.8710.78.181.87
4510.78.181.88/3110.78.181.88 – 10.78.181.8910.78.181.89
4610.78.181.90/3110.78.181.90 – 10.78.181.9110.78.181.91
4710.78.181.92/3110.78.181.92 – 10.78.181.9310.78.181.93
4810.78.181.94/3110.78.181.94 – 10.78.181.9510.78.181.95
4910.78.181.96/3110.78.181.96 – 10.78.181.9710.78.181.97
5010.78.181.98/3110.78.181.98 – 10.78.181.9910.78.181.99
5110.78.181.100/3110.78.181.100 – 10.78.181.10110.78.181.101
5210.78.181.102/3110.78.181.102 – 10.78.181.10310.78.181.103
5310.78.181.104/3110.78.181.104 – 10.78.181.10510.78.181.105
5410.78.181.106/3110.78.181.106 – 10.78.181.10710.78.181.107
5510.78.181.108/3110.78.181.108 – 10.78.181.10910.78.181.109
5610.78.181.110/3110.78.181.110 – 10.78.181.11110.78.181.111
5710.78.181.112/3110.78.181.112 – 10.78.181.11310.78.181.113
5810.78.181.114/3110.78.181.114 – 10.78.181.11510.78.181.115
5910.78.181.116/3110.78.181.116 – 10.78.181.11710.78.181.117
6010.78.181.118/3110.78.181.118 – 10.78.181.11910.78.181.119
6110.78.181.120/3110.78.181.120 – 10.78.181.12110.78.181.121
6210.78.181.122/3110.78.181.122 – 10.78.181.12310.78.181.123
6310.78.181.124/3110.78.181.124 – 10.78.181.12510.78.181.125
6410.78.181.126/3110.78.181.126 – 10.78.181.12710.78.181.127
6510.78.181.128/3110.78.181.128 – 10.78.181.12910.78.181.129
6610.78.181.130/3110.78.181.130 – 10.78.181.13110.78.181.131
6710.78.181.132/3110.78.181.132 – 10.78.181.13310.78.181.133
6810.78.181.134/3110.78.181.134 – 10.78.181.13510.78.181.135
6910.78.181.136/3110.78.181.136 – 10.78.181.13710.78.181.137
7010.78.181.138/3110.78.181.138 – 10.78.181.13910.78.181.139
7110.78.181.140/3110.78.181.140 – 10.78.181.14110.78.181.141
7210.78.181.142/3110.78.181.142 – 10.78.181.14310.78.181.143
7310.78.181.144/3110.78.181.144 – 10.78.181.14510.78.181.145
7410.78.181.146/3110.78.181.146 – 10.78.181.14710.78.181.147
7510.78.181.148/3110.78.181.148 – 10.78.181.14910.78.181.149
7610.78.181.150/3110.78.181.150 – 10.78.181.15110.78.181.151
7710.78.181.152/3110.78.181.152 – 10.78.181.15310.78.181.153
7810.78.181.154/3110.78.181.154 – 10.78.181.15510.78.181.155
7910.78.181.156/3110.78.181.156 – 10.78.181.15710.78.181.157
8010.78.181.158/3110.78.181.158 – 10.78.181.15910.78.181.159
8110.78.181.160/3110.78.181.160 – 10.78.181.16110.78.181.161
8210.78.181.162/3110.78.181.162 – 10.78.181.16310.78.181.163
8310.78.181.164/3110.78.181.164 – 10.78.181.16510.78.181.165
8410.78.181.166/3110.78.181.166 – 10.78.181.16710.78.181.167
8510.78.181.168/3110.78.181.168 – 10.78.181.16910.78.181.169
8610.78.181.170/3110.78.181.170 – 10.78.181.17110.78.181.171
8710.78.181.172/3110.78.181.172 – 10.78.181.17310.78.181.173
8810.78.181.174/3110.78.181.174 – 10.78.181.17510.78.181.175
8910.78.181.176/3110.78.181.176 – 10.78.181.17710.78.181.177
9010.78.181.178/3110.78.181.178 – 10.78.181.17910.78.181.179
9110.78.181.180/3110.78.181.180 – 10.78.181.18110.78.181.181
9210.78.181.182/3110.78.181.182 – 10.78.181.18310.78.181.183
9310.78.181.184/3110.78.181.184 – 10.78.181.18510.78.181.185
9410.78.181.186/3110.78.181.186 – 10.78.181.18710.78.181.187
9510.78.181.188/3110.78.181.188 – 10.78.181.18910.78.181.189
9610.78.181.190/3110.78.181.190 – 10.78.181.19110.78.181.191
9710.78.181.192/3110.78.181.192 – 10.78.181.19310.78.181.193
9810.78.181.194/3110.78.181.194 – 10.78.181.19510.78.181.195
9910.78.181.196/3110.78.181.196 – 10.78.181.19710.78.181.197
10010.78.181.198/3110.78.181.198 – 10.78.181.19910.78.181.199
10110.78.181.200/3110.78.181.200 – 10.78.181.20110.78.181.201
10210.78.181.202/3110.78.181.202 – 10.78.181.20310.78.181.203
10310.78.181.204/3110.78.181.204 – 10.78.181.20510.78.181.205
10410.78.181.206/3110.78.181.206 – 10.78.181.20710.78.181.207
10510.78.181.208/3110.78.181.208 – 10.78.181.20910.78.181.209
10610.78.181.210/3110.78.181.210 – 10.78.181.21110.78.181.211
10710.78.181.212/3110.78.181.212 – 10.78.181.21310.78.181.213
10810.78.181.214/3110.78.181.214 – 10.78.181.21510.78.181.215
10910.78.181.216/3110.78.181.216 – 10.78.181.21710.78.181.217
11010.78.181.218/3110.78.181.218 – 10.78.181.21910.78.181.219
11110.78.181.220/3110.78.181.220 – 10.78.181.22110.78.181.221
11210.78.181.222/3110.78.181.222 – 10.78.181.22310.78.181.223
11310.78.181.224/3110.78.181.224 – 10.78.181.22510.78.181.225
11410.78.181.226/3110.78.181.226 – 10.78.181.22710.78.181.227
11510.78.181.228/3110.78.181.228 – 10.78.181.22910.78.181.229
11610.78.181.230/3110.78.181.230 – 10.78.181.23110.78.181.231
11710.78.181.232/3110.78.181.232 – 10.78.181.23310.78.181.233
11810.78.181.234/3110.78.181.234 – 10.78.181.23510.78.181.235
11910.78.181.236/3110.78.181.236 – 10.78.181.23710.78.181.237
12010.78.181.238/3110.78.181.238 – 10.78.181.23910.78.181.239
12110.78.181.240/3110.78.181.240 – 10.78.181.24110.78.181.241
12210.78.181.242/3110.78.181.242 – 10.78.181.24310.78.181.243
12310.78.181.244/3110.78.181.244 – 10.78.181.24510.78.181.245
12410.78.181.246/3110.78.181.246 – 10.78.181.24710.78.181.247
12510.78.181.248/3110.78.181.248 – 10.78.181.24910.78.181.249
12610.78.181.250/3110.78.181.250 – 10.78.181.25110.78.181.251
12710.78.181.252/3110.78.181.252 – 10.78.181.25310.78.181.253
12810.78.181.254/3110.78.181.254 – 10.78.181.25510.78.181.255
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 →