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)10.78.43.0/24
network10.78.43.0/24
broadcast10.78.43.255
first host10.78.43.1
last host10.78.43.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.43.0/24
address00001010.01001110.00101011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.00101011.00000000
broadcast00001010.01001110.00101011.11111111
green = network part, grey = host part
hex0x0a4e2b00
decimal172894976
reverse dns0.43.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:2b00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.43.0/3110.78.43.0 – 10.78.43.110.78.43.1
210.78.43.2/3110.78.43.2 – 10.78.43.310.78.43.3
310.78.43.4/3110.78.43.4 – 10.78.43.510.78.43.5
410.78.43.6/3110.78.43.6 – 10.78.43.710.78.43.7
510.78.43.8/3110.78.43.8 – 10.78.43.910.78.43.9
610.78.43.10/3110.78.43.10 – 10.78.43.1110.78.43.11
710.78.43.12/3110.78.43.12 – 10.78.43.1310.78.43.13
810.78.43.14/3110.78.43.14 – 10.78.43.1510.78.43.15
910.78.43.16/3110.78.43.16 – 10.78.43.1710.78.43.17
1010.78.43.18/3110.78.43.18 – 10.78.43.1910.78.43.19
1110.78.43.20/3110.78.43.20 – 10.78.43.2110.78.43.21
1210.78.43.22/3110.78.43.22 – 10.78.43.2310.78.43.23
1310.78.43.24/3110.78.43.24 – 10.78.43.2510.78.43.25
1410.78.43.26/3110.78.43.26 – 10.78.43.2710.78.43.27
1510.78.43.28/3110.78.43.28 – 10.78.43.2910.78.43.29
1610.78.43.30/3110.78.43.30 – 10.78.43.3110.78.43.31
1710.78.43.32/3110.78.43.32 – 10.78.43.3310.78.43.33
1810.78.43.34/3110.78.43.34 – 10.78.43.3510.78.43.35
1910.78.43.36/3110.78.43.36 – 10.78.43.3710.78.43.37
2010.78.43.38/3110.78.43.38 – 10.78.43.3910.78.43.39
2110.78.43.40/3110.78.43.40 – 10.78.43.4110.78.43.41
2210.78.43.42/3110.78.43.42 – 10.78.43.4310.78.43.43
2310.78.43.44/3110.78.43.44 – 10.78.43.4510.78.43.45
2410.78.43.46/3110.78.43.46 – 10.78.43.4710.78.43.47
2510.78.43.48/3110.78.43.48 – 10.78.43.4910.78.43.49
2610.78.43.50/3110.78.43.50 – 10.78.43.5110.78.43.51
2710.78.43.52/3110.78.43.52 – 10.78.43.5310.78.43.53
2810.78.43.54/3110.78.43.54 – 10.78.43.5510.78.43.55
2910.78.43.56/3110.78.43.56 – 10.78.43.5710.78.43.57
3010.78.43.58/3110.78.43.58 – 10.78.43.5910.78.43.59
3110.78.43.60/3110.78.43.60 – 10.78.43.6110.78.43.61
3210.78.43.62/3110.78.43.62 – 10.78.43.6310.78.43.63
3310.78.43.64/3110.78.43.64 – 10.78.43.6510.78.43.65
3410.78.43.66/3110.78.43.66 – 10.78.43.6710.78.43.67
3510.78.43.68/3110.78.43.68 – 10.78.43.6910.78.43.69
3610.78.43.70/3110.78.43.70 – 10.78.43.7110.78.43.71
3710.78.43.72/3110.78.43.72 – 10.78.43.7310.78.43.73
3810.78.43.74/3110.78.43.74 – 10.78.43.7510.78.43.75
3910.78.43.76/3110.78.43.76 – 10.78.43.7710.78.43.77
4010.78.43.78/3110.78.43.78 – 10.78.43.7910.78.43.79
4110.78.43.80/3110.78.43.80 – 10.78.43.8110.78.43.81
4210.78.43.82/3110.78.43.82 – 10.78.43.8310.78.43.83
4310.78.43.84/3110.78.43.84 – 10.78.43.8510.78.43.85
4410.78.43.86/3110.78.43.86 – 10.78.43.8710.78.43.87
4510.78.43.88/3110.78.43.88 – 10.78.43.8910.78.43.89
4610.78.43.90/3110.78.43.90 – 10.78.43.9110.78.43.91
4710.78.43.92/3110.78.43.92 – 10.78.43.9310.78.43.93
4810.78.43.94/3110.78.43.94 – 10.78.43.9510.78.43.95
4910.78.43.96/3110.78.43.96 – 10.78.43.9710.78.43.97
5010.78.43.98/3110.78.43.98 – 10.78.43.9910.78.43.99
5110.78.43.100/3110.78.43.100 – 10.78.43.10110.78.43.101
5210.78.43.102/3110.78.43.102 – 10.78.43.10310.78.43.103
5310.78.43.104/3110.78.43.104 – 10.78.43.10510.78.43.105
5410.78.43.106/3110.78.43.106 – 10.78.43.10710.78.43.107
5510.78.43.108/3110.78.43.108 – 10.78.43.10910.78.43.109
5610.78.43.110/3110.78.43.110 – 10.78.43.11110.78.43.111
5710.78.43.112/3110.78.43.112 – 10.78.43.11310.78.43.113
5810.78.43.114/3110.78.43.114 – 10.78.43.11510.78.43.115
5910.78.43.116/3110.78.43.116 – 10.78.43.11710.78.43.117
6010.78.43.118/3110.78.43.118 – 10.78.43.11910.78.43.119
6110.78.43.120/3110.78.43.120 – 10.78.43.12110.78.43.121
6210.78.43.122/3110.78.43.122 – 10.78.43.12310.78.43.123
6310.78.43.124/3110.78.43.124 – 10.78.43.12510.78.43.125
6410.78.43.126/3110.78.43.126 – 10.78.43.12710.78.43.127
6510.78.43.128/3110.78.43.128 – 10.78.43.12910.78.43.129
6610.78.43.130/3110.78.43.130 – 10.78.43.13110.78.43.131
6710.78.43.132/3110.78.43.132 – 10.78.43.13310.78.43.133
6810.78.43.134/3110.78.43.134 – 10.78.43.13510.78.43.135
6910.78.43.136/3110.78.43.136 – 10.78.43.13710.78.43.137
7010.78.43.138/3110.78.43.138 – 10.78.43.13910.78.43.139
7110.78.43.140/3110.78.43.140 – 10.78.43.14110.78.43.141
7210.78.43.142/3110.78.43.142 – 10.78.43.14310.78.43.143
7310.78.43.144/3110.78.43.144 – 10.78.43.14510.78.43.145
7410.78.43.146/3110.78.43.146 – 10.78.43.14710.78.43.147
7510.78.43.148/3110.78.43.148 – 10.78.43.14910.78.43.149
7610.78.43.150/3110.78.43.150 – 10.78.43.15110.78.43.151
7710.78.43.152/3110.78.43.152 – 10.78.43.15310.78.43.153
7810.78.43.154/3110.78.43.154 – 10.78.43.15510.78.43.155
7910.78.43.156/3110.78.43.156 – 10.78.43.15710.78.43.157
8010.78.43.158/3110.78.43.158 – 10.78.43.15910.78.43.159
8110.78.43.160/3110.78.43.160 – 10.78.43.16110.78.43.161
8210.78.43.162/3110.78.43.162 – 10.78.43.16310.78.43.163
8310.78.43.164/3110.78.43.164 – 10.78.43.16510.78.43.165
8410.78.43.166/3110.78.43.166 – 10.78.43.16710.78.43.167
8510.78.43.168/3110.78.43.168 – 10.78.43.16910.78.43.169
8610.78.43.170/3110.78.43.170 – 10.78.43.17110.78.43.171
8710.78.43.172/3110.78.43.172 – 10.78.43.17310.78.43.173
8810.78.43.174/3110.78.43.174 – 10.78.43.17510.78.43.175
8910.78.43.176/3110.78.43.176 – 10.78.43.17710.78.43.177
9010.78.43.178/3110.78.43.178 – 10.78.43.17910.78.43.179
9110.78.43.180/3110.78.43.180 – 10.78.43.18110.78.43.181
9210.78.43.182/3110.78.43.182 – 10.78.43.18310.78.43.183
9310.78.43.184/3110.78.43.184 – 10.78.43.18510.78.43.185
9410.78.43.186/3110.78.43.186 – 10.78.43.18710.78.43.187
9510.78.43.188/3110.78.43.188 – 10.78.43.18910.78.43.189
9610.78.43.190/3110.78.43.190 – 10.78.43.19110.78.43.191
9710.78.43.192/3110.78.43.192 – 10.78.43.19310.78.43.193
9810.78.43.194/3110.78.43.194 – 10.78.43.19510.78.43.195
9910.78.43.196/3110.78.43.196 – 10.78.43.19710.78.43.197
10010.78.43.198/3110.78.43.198 – 10.78.43.19910.78.43.199
10110.78.43.200/3110.78.43.200 – 10.78.43.20110.78.43.201
10210.78.43.202/3110.78.43.202 – 10.78.43.20310.78.43.203
10310.78.43.204/3110.78.43.204 – 10.78.43.20510.78.43.205
10410.78.43.206/3110.78.43.206 – 10.78.43.20710.78.43.207
10510.78.43.208/3110.78.43.208 – 10.78.43.20910.78.43.209
10610.78.43.210/3110.78.43.210 – 10.78.43.21110.78.43.211
10710.78.43.212/3110.78.43.212 – 10.78.43.21310.78.43.213
10810.78.43.214/3110.78.43.214 – 10.78.43.21510.78.43.215
10910.78.43.216/3110.78.43.216 – 10.78.43.21710.78.43.217
11010.78.43.218/3110.78.43.218 – 10.78.43.21910.78.43.219
11110.78.43.220/3110.78.43.220 – 10.78.43.22110.78.43.221
11210.78.43.222/3110.78.43.222 – 10.78.43.22310.78.43.223
11310.78.43.224/3110.78.43.224 – 10.78.43.22510.78.43.225
11410.78.43.226/3110.78.43.226 – 10.78.43.22710.78.43.227
11510.78.43.228/3110.78.43.228 – 10.78.43.22910.78.43.229
11610.78.43.230/3110.78.43.230 – 10.78.43.23110.78.43.231
11710.78.43.232/3110.78.43.232 – 10.78.43.23310.78.43.233
11810.78.43.234/3110.78.43.234 – 10.78.43.23510.78.43.235
11910.78.43.236/3110.78.43.236 – 10.78.43.23710.78.43.237
12010.78.43.238/3110.78.43.238 – 10.78.43.23910.78.43.239
12110.78.43.240/3110.78.43.240 – 10.78.43.24110.78.43.241
12210.78.43.242/3110.78.43.242 – 10.78.43.24310.78.43.243
12310.78.43.244/3110.78.43.244 – 10.78.43.24510.78.43.245
12410.78.43.246/3110.78.43.246 – 10.78.43.24710.78.43.247
12510.78.43.248/3110.78.43.248 – 10.78.43.24910.78.43.249
12610.78.43.250/3110.78.43.250 – 10.78.43.25110.78.43.251
12710.78.43.252/3110.78.43.252 – 10.78.43.25310.78.43.253
12810.78.43.254/3110.78.43.254 – 10.78.43.25510.78.43.255
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 →