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)10.78.17.0/24
network10.78.17.0/24
broadcast10.78.17.255
first host10.78.17.1
last host10.78.17.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.17.0/24
address00001010.01001110.00010001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.00010001.00000000
broadcast00001010.01001110.00010001.11111111
green = network part, grey = host part
hex0x0a4e1100
decimal172888320
reverse dns0.17.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:1100

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.17.0/3110.78.17.0 – 10.78.17.110.78.17.1
210.78.17.2/3110.78.17.2 – 10.78.17.310.78.17.3
310.78.17.4/3110.78.17.4 – 10.78.17.510.78.17.5
410.78.17.6/3110.78.17.6 – 10.78.17.710.78.17.7
510.78.17.8/3110.78.17.8 – 10.78.17.910.78.17.9
610.78.17.10/3110.78.17.10 – 10.78.17.1110.78.17.11
710.78.17.12/3110.78.17.12 – 10.78.17.1310.78.17.13
810.78.17.14/3110.78.17.14 – 10.78.17.1510.78.17.15
910.78.17.16/3110.78.17.16 – 10.78.17.1710.78.17.17
1010.78.17.18/3110.78.17.18 – 10.78.17.1910.78.17.19
1110.78.17.20/3110.78.17.20 – 10.78.17.2110.78.17.21
1210.78.17.22/3110.78.17.22 – 10.78.17.2310.78.17.23
1310.78.17.24/3110.78.17.24 – 10.78.17.2510.78.17.25
1410.78.17.26/3110.78.17.26 – 10.78.17.2710.78.17.27
1510.78.17.28/3110.78.17.28 – 10.78.17.2910.78.17.29
1610.78.17.30/3110.78.17.30 – 10.78.17.3110.78.17.31
1710.78.17.32/3110.78.17.32 – 10.78.17.3310.78.17.33
1810.78.17.34/3110.78.17.34 – 10.78.17.3510.78.17.35
1910.78.17.36/3110.78.17.36 – 10.78.17.3710.78.17.37
2010.78.17.38/3110.78.17.38 – 10.78.17.3910.78.17.39
2110.78.17.40/3110.78.17.40 – 10.78.17.4110.78.17.41
2210.78.17.42/3110.78.17.42 – 10.78.17.4310.78.17.43
2310.78.17.44/3110.78.17.44 – 10.78.17.4510.78.17.45
2410.78.17.46/3110.78.17.46 – 10.78.17.4710.78.17.47
2510.78.17.48/3110.78.17.48 – 10.78.17.4910.78.17.49
2610.78.17.50/3110.78.17.50 – 10.78.17.5110.78.17.51
2710.78.17.52/3110.78.17.52 – 10.78.17.5310.78.17.53
2810.78.17.54/3110.78.17.54 – 10.78.17.5510.78.17.55
2910.78.17.56/3110.78.17.56 – 10.78.17.5710.78.17.57
3010.78.17.58/3110.78.17.58 – 10.78.17.5910.78.17.59
3110.78.17.60/3110.78.17.60 – 10.78.17.6110.78.17.61
3210.78.17.62/3110.78.17.62 – 10.78.17.6310.78.17.63
3310.78.17.64/3110.78.17.64 – 10.78.17.6510.78.17.65
3410.78.17.66/3110.78.17.66 – 10.78.17.6710.78.17.67
3510.78.17.68/3110.78.17.68 – 10.78.17.6910.78.17.69
3610.78.17.70/3110.78.17.70 – 10.78.17.7110.78.17.71
3710.78.17.72/3110.78.17.72 – 10.78.17.7310.78.17.73
3810.78.17.74/3110.78.17.74 – 10.78.17.7510.78.17.75
3910.78.17.76/3110.78.17.76 – 10.78.17.7710.78.17.77
4010.78.17.78/3110.78.17.78 – 10.78.17.7910.78.17.79
4110.78.17.80/3110.78.17.80 – 10.78.17.8110.78.17.81
4210.78.17.82/3110.78.17.82 – 10.78.17.8310.78.17.83
4310.78.17.84/3110.78.17.84 – 10.78.17.8510.78.17.85
4410.78.17.86/3110.78.17.86 – 10.78.17.8710.78.17.87
4510.78.17.88/3110.78.17.88 – 10.78.17.8910.78.17.89
4610.78.17.90/3110.78.17.90 – 10.78.17.9110.78.17.91
4710.78.17.92/3110.78.17.92 – 10.78.17.9310.78.17.93
4810.78.17.94/3110.78.17.94 – 10.78.17.9510.78.17.95
4910.78.17.96/3110.78.17.96 – 10.78.17.9710.78.17.97
5010.78.17.98/3110.78.17.98 – 10.78.17.9910.78.17.99
5110.78.17.100/3110.78.17.100 – 10.78.17.10110.78.17.101
5210.78.17.102/3110.78.17.102 – 10.78.17.10310.78.17.103
5310.78.17.104/3110.78.17.104 – 10.78.17.10510.78.17.105
5410.78.17.106/3110.78.17.106 – 10.78.17.10710.78.17.107
5510.78.17.108/3110.78.17.108 – 10.78.17.10910.78.17.109
5610.78.17.110/3110.78.17.110 – 10.78.17.11110.78.17.111
5710.78.17.112/3110.78.17.112 – 10.78.17.11310.78.17.113
5810.78.17.114/3110.78.17.114 – 10.78.17.11510.78.17.115
5910.78.17.116/3110.78.17.116 – 10.78.17.11710.78.17.117
6010.78.17.118/3110.78.17.118 – 10.78.17.11910.78.17.119
6110.78.17.120/3110.78.17.120 – 10.78.17.12110.78.17.121
6210.78.17.122/3110.78.17.122 – 10.78.17.12310.78.17.123
6310.78.17.124/3110.78.17.124 – 10.78.17.12510.78.17.125
6410.78.17.126/3110.78.17.126 – 10.78.17.12710.78.17.127
6510.78.17.128/3110.78.17.128 – 10.78.17.12910.78.17.129
6610.78.17.130/3110.78.17.130 – 10.78.17.13110.78.17.131
6710.78.17.132/3110.78.17.132 – 10.78.17.13310.78.17.133
6810.78.17.134/3110.78.17.134 – 10.78.17.13510.78.17.135
6910.78.17.136/3110.78.17.136 – 10.78.17.13710.78.17.137
7010.78.17.138/3110.78.17.138 – 10.78.17.13910.78.17.139
7110.78.17.140/3110.78.17.140 – 10.78.17.14110.78.17.141
7210.78.17.142/3110.78.17.142 – 10.78.17.14310.78.17.143
7310.78.17.144/3110.78.17.144 – 10.78.17.14510.78.17.145
7410.78.17.146/3110.78.17.146 – 10.78.17.14710.78.17.147
7510.78.17.148/3110.78.17.148 – 10.78.17.14910.78.17.149
7610.78.17.150/3110.78.17.150 – 10.78.17.15110.78.17.151
7710.78.17.152/3110.78.17.152 – 10.78.17.15310.78.17.153
7810.78.17.154/3110.78.17.154 – 10.78.17.15510.78.17.155
7910.78.17.156/3110.78.17.156 – 10.78.17.15710.78.17.157
8010.78.17.158/3110.78.17.158 – 10.78.17.15910.78.17.159
8110.78.17.160/3110.78.17.160 – 10.78.17.16110.78.17.161
8210.78.17.162/3110.78.17.162 – 10.78.17.16310.78.17.163
8310.78.17.164/3110.78.17.164 – 10.78.17.16510.78.17.165
8410.78.17.166/3110.78.17.166 – 10.78.17.16710.78.17.167
8510.78.17.168/3110.78.17.168 – 10.78.17.16910.78.17.169
8610.78.17.170/3110.78.17.170 – 10.78.17.17110.78.17.171
8710.78.17.172/3110.78.17.172 – 10.78.17.17310.78.17.173
8810.78.17.174/3110.78.17.174 – 10.78.17.17510.78.17.175
8910.78.17.176/3110.78.17.176 – 10.78.17.17710.78.17.177
9010.78.17.178/3110.78.17.178 – 10.78.17.17910.78.17.179
9110.78.17.180/3110.78.17.180 – 10.78.17.18110.78.17.181
9210.78.17.182/3110.78.17.182 – 10.78.17.18310.78.17.183
9310.78.17.184/3110.78.17.184 – 10.78.17.18510.78.17.185
9410.78.17.186/3110.78.17.186 – 10.78.17.18710.78.17.187
9510.78.17.188/3110.78.17.188 – 10.78.17.18910.78.17.189
9610.78.17.190/3110.78.17.190 – 10.78.17.19110.78.17.191
9710.78.17.192/3110.78.17.192 – 10.78.17.19310.78.17.193
9810.78.17.194/3110.78.17.194 – 10.78.17.19510.78.17.195
9910.78.17.196/3110.78.17.196 – 10.78.17.19710.78.17.197
10010.78.17.198/3110.78.17.198 – 10.78.17.19910.78.17.199
10110.78.17.200/3110.78.17.200 – 10.78.17.20110.78.17.201
10210.78.17.202/3110.78.17.202 – 10.78.17.20310.78.17.203
10310.78.17.204/3110.78.17.204 – 10.78.17.20510.78.17.205
10410.78.17.206/3110.78.17.206 – 10.78.17.20710.78.17.207
10510.78.17.208/3110.78.17.208 – 10.78.17.20910.78.17.209
10610.78.17.210/3110.78.17.210 – 10.78.17.21110.78.17.211
10710.78.17.212/3110.78.17.212 – 10.78.17.21310.78.17.213
10810.78.17.214/3110.78.17.214 – 10.78.17.21510.78.17.215
10910.78.17.216/3110.78.17.216 – 10.78.17.21710.78.17.217
11010.78.17.218/3110.78.17.218 – 10.78.17.21910.78.17.219
11110.78.17.220/3110.78.17.220 – 10.78.17.22110.78.17.221
11210.78.17.222/3110.78.17.222 – 10.78.17.22310.78.17.223
11310.78.17.224/3110.78.17.224 – 10.78.17.22510.78.17.225
11410.78.17.226/3110.78.17.226 – 10.78.17.22710.78.17.227
11510.78.17.228/3110.78.17.228 – 10.78.17.22910.78.17.229
11610.78.17.230/3110.78.17.230 – 10.78.17.23110.78.17.231
11710.78.17.232/3110.78.17.232 – 10.78.17.23310.78.17.233
11810.78.17.234/3110.78.17.234 – 10.78.17.23510.78.17.235
11910.78.17.236/3110.78.17.236 – 10.78.17.23710.78.17.237
12010.78.17.238/3110.78.17.238 – 10.78.17.23910.78.17.239
12110.78.17.240/3110.78.17.240 – 10.78.17.24110.78.17.241
12210.78.17.242/3110.78.17.242 – 10.78.17.24310.78.17.243
12310.78.17.244/3110.78.17.244 – 10.78.17.24510.78.17.245
12410.78.17.246/3110.78.17.246 – 10.78.17.24710.78.17.247
12510.78.17.248/3110.78.17.248 – 10.78.17.24910.78.17.249
12610.78.17.250/3110.78.17.250 – 10.78.17.25110.78.17.251
12710.78.17.252/3110.78.17.252 – 10.78.17.25310.78.17.253
12810.78.17.254/3110.78.17.254 – 10.78.17.25510.78.17.255
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 →