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)10.78.221.0/24
network10.78.221.0/24
broadcast10.78.221.255
first host10.78.221.1
last host10.78.221.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.78.221.0/24
address00001010.01001110.11011101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01001110.11011101.00000000
broadcast00001010.01001110.11011101.11111111
green = network part, grey = host part
hex0x0a4edd00
decimal172940544
reverse dns0.221.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:dd00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.221.0/3110.78.221.0 – 10.78.221.110.78.221.1
210.78.221.2/3110.78.221.2 – 10.78.221.310.78.221.3
310.78.221.4/3110.78.221.4 – 10.78.221.510.78.221.5
410.78.221.6/3110.78.221.6 – 10.78.221.710.78.221.7
510.78.221.8/3110.78.221.8 – 10.78.221.910.78.221.9
610.78.221.10/3110.78.221.10 – 10.78.221.1110.78.221.11
710.78.221.12/3110.78.221.12 – 10.78.221.1310.78.221.13
810.78.221.14/3110.78.221.14 – 10.78.221.1510.78.221.15
910.78.221.16/3110.78.221.16 – 10.78.221.1710.78.221.17
1010.78.221.18/3110.78.221.18 – 10.78.221.1910.78.221.19
1110.78.221.20/3110.78.221.20 – 10.78.221.2110.78.221.21
1210.78.221.22/3110.78.221.22 – 10.78.221.2310.78.221.23
1310.78.221.24/3110.78.221.24 – 10.78.221.2510.78.221.25
1410.78.221.26/3110.78.221.26 – 10.78.221.2710.78.221.27
1510.78.221.28/3110.78.221.28 – 10.78.221.2910.78.221.29
1610.78.221.30/3110.78.221.30 – 10.78.221.3110.78.221.31
1710.78.221.32/3110.78.221.32 – 10.78.221.3310.78.221.33
1810.78.221.34/3110.78.221.34 – 10.78.221.3510.78.221.35
1910.78.221.36/3110.78.221.36 – 10.78.221.3710.78.221.37
2010.78.221.38/3110.78.221.38 – 10.78.221.3910.78.221.39
2110.78.221.40/3110.78.221.40 – 10.78.221.4110.78.221.41
2210.78.221.42/3110.78.221.42 – 10.78.221.4310.78.221.43
2310.78.221.44/3110.78.221.44 – 10.78.221.4510.78.221.45
2410.78.221.46/3110.78.221.46 – 10.78.221.4710.78.221.47
2510.78.221.48/3110.78.221.48 – 10.78.221.4910.78.221.49
2610.78.221.50/3110.78.221.50 – 10.78.221.5110.78.221.51
2710.78.221.52/3110.78.221.52 – 10.78.221.5310.78.221.53
2810.78.221.54/3110.78.221.54 – 10.78.221.5510.78.221.55
2910.78.221.56/3110.78.221.56 – 10.78.221.5710.78.221.57
3010.78.221.58/3110.78.221.58 – 10.78.221.5910.78.221.59
3110.78.221.60/3110.78.221.60 – 10.78.221.6110.78.221.61
3210.78.221.62/3110.78.221.62 – 10.78.221.6310.78.221.63
3310.78.221.64/3110.78.221.64 – 10.78.221.6510.78.221.65
3410.78.221.66/3110.78.221.66 – 10.78.221.6710.78.221.67
3510.78.221.68/3110.78.221.68 – 10.78.221.6910.78.221.69
3610.78.221.70/3110.78.221.70 – 10.78.221.7110.78.221.71
3710.78.221.72/3110.78.221.72 – 10.78.221.7310.78.221.73
3810.78.221.74/3110.78.221.74 – 10.78.221.7510.78.221.75
3910.78.221.76/3110.78.221.76 – 10.78.221.7710.78.221.77
4010.78.221.78/3110.78.221.78 – 10.78.221.7910.78.221.79
4110.78.221.80/3110.78.221.80 – 10.78.221.8110.78.221.81
4210.78.221.82/3110.78.221.82 – 10.78.221.8310.78.221.83
4310.78.221.84/3110.78.221.84 – 10.78.221.8510.78.221.85
4410.78.221.86/3110.78.221.86 – 10.78.221.8710.78.221.87
4510.78.221.88/3110.78.221.88 – 10.78.221.8910.78.221.89
4610.78.221.90/3110.78.221.90 – 10.78.221.9110.78.221.91
4710.78.221.92/3110.78.221.92 – 10.78.221.9310.78.221.93
4810.78.221.94/3110.78.221.94 – 10.78.221.9510.78.221.95
4910.78.221.96/3110.78.221.96 – 10.78.221.9710.78.221.97
5010.78.221.98/3110.78.221.98 – 10.78.221.9910.78.221.99
5110.78.221.100/3110.78.221.100 – 10.78.221.10110.78.221.101
5210.78.221.102/3110.78.221.102 – 10.78.221.10310.78.221.103
5310.78.221.104/3110.78.221.104 – 10.78.221.10510.78.221.105
5410.78.221.106/3110.78.221.106 – 10.78.221.10710.78.221.107
5510.78.221.108/3110.78.221.108 – 10.78.221.10910.78.221.109
5610.78.221.110/3110.78.221.110 – 10.78.221.11110.78.221.111
5710.78.221.112/3110.78.221.112 – 10.78.221.11310.78.221.113
5810.78.221.114/3110.78.221.114 – 10.78.221.11510.78.221.115
5910.78.221.116/3110.78.221.116 – 10.78.221.11710.78.221.117
6010.78.221.118/3110.78.221.118 – 10.78.221.11910.78.221.119
6110.78.221.120/3110.78.221.120 – 10.78.221.12110.78.221.121
6210.78.221.122/3110.78.221.122 – 10.78.221.12310.78.221.123
6310.78.221.124/3110.78.221.124 – 10.78.221.12510.78.221.125
6410.78.221.126/3110.78.221.126 – 10.78.221.12710.78.221.127
6510.78.221.128/3110.78.221.128 – 10.78.221.12910.78.221.129
6610.78.221.130/3110.78.221.130 – 10.78.221.13110.78.221.131
6710.78.221.132/3110.78.221.132 – 10.78.221.13310.78.221.133
6810.78.221.134/3110.78.221.134 – 10.78.221.13510.78.221.135
6910.78.221.136/3110.78.221.136 – 10.78.221.13710.78.221.137
7010.78.221.138/3110.78.221.138 – 10.78.221.13910.78.221.139
7110.78.221.140/3110.78.221.140 – 10.78.221.14110.78.221.141
7210.78.221.142/3110.78.221.142 – 10.78.221.14310.78.221.143
7310.78.221.144/3110.78.221.144 – 10.78.221.14510.78.221.145
7410.78.221.146/3110.78.221.146 – 10.78.221.14710.78.221.147
7510.78.221.148/3110.78.221.148 – 10.78.221.14910.78.221.149
7610.78.221.150/3110.78.221.150 – 10.78.221.15110.78.221.151
7710.78.221.152/3110.78.221.152 – 10.78.221.15310.78.221.153
7810.78.221.154/3110.78.221.154 – 10.78.221.15510.78.221.155
7910.78.221.156/3110.78.221.156 – 10.78.221.15710.78.221.157
8010.78.221.158/3110.78.221.158 – 10.78.221.15910.78.221.159
8110.78.221.160/3110.78.221.160 – 10.78.221.16110.78.221.161
8210.78.221.162/3110.78.221.162 – 10.78.221.16310.78.221.163
8310.78.221.164/3110.78.221.164 – 10.78.221.16510.78.221.165
8410.78.221.166/3110.78.221.166 – 10.78.221.16710.78.221.167
8510.78.221.168/3110.78.221.168 – 10.78.221.16910.78.221.169
8610.78.221.170/3110.78.221.170 – 10.78.221.17110.78.221.171
8710.78.221.172/3110.78.221.172 – 10.78.221.17310.78.221.173
8810.78.221.174/3110.78.221.174 – 10.78.221.17510.78.221.175
8910.78.221.176/3110.78.221.176 – 10.78.221.17710.78.221.177
9010.78.221.178/3110.78.221.178 – 10.78.221.17910.78.221.179
9110.78.221.180/3110.78.221.180 – 10.78.221.18110.78.221.181
9210.78.221.182/3110.78.221.182 – 10.78.221.18310.78.221.183
9310.78.221.184/3110.78.221.184 – 10.78.221.18510.78.221.185
9410.78.221.186/3110.78.221.186 – 10.78.221.18710.78.221.187
9510.78.221.188/3110.78.221.188 – 10.78.221.18910.78.221.189
9610.78.221.190/3110.78.221.190 – 10.78.221.19110.78.221.191
9710.78.221.192/3110.78.221.192 – 10.78.221.19310.78.221.193
9810.78.221.194/3110.78.221.194 – 10.78.221.19510.78.221.195
9910.78.221.196/3110.78.221.196 – 10.78.221.19710.78.221.197
10010.78.221.198/3110.78.221.198 – 10.78.221.19910.78.221.199
10110.78.221.200/3110.78.221.200 – 10.78.221.20110.78.221.201
10210.78.221.202/3110.78.221.202 – 10.78.221.20310.78.221.203
10310.78.221.204/3110.78.221.204 – 10.78.221.20510.78.221.205
10410.78.221.206/3110.78.221.206 – 10.78.221.20710.78.221.207
10510.78.221.208/3110.78.221.208 – 10.78.221.20910.78.221.209
10610.78.221.210/3110.78.221.210 – 10.78.221.21110.78.221.211
10710.78.221.212/3110.78.221.212 – 10.78.221.21310.78.221.213
10810.78.221.214/3110.78.221.214 – 10.78.221.21510.78.221.215
10910.78.221.216/3110.78.221.216 – 10.78.221.21710.78.221.217
11010.78.221.218/3110.78.221.218 – 10.78.221.21910.78.221.219
11110.78.221.220/3110.78.221.220 – 10.78.221.22110.78.221.221
11210.78.221.222/3110.78.221.222 – 10.78.221.22310.78.221.223
11310.78.221.224/3110.78.221.224 – 10.78.221.22510.78.221.225
11410.78.221.226/3110.78.221.226 – 10.78.221.22710.78.221.227
11510.78.221.228/3110.78.221.228 – 10.78.221.22910.78.221.229
11610.78.221.230/3110.78.221.230 – 10.78.221.23110.78.221.231
11710.78.221.232/3110.78.221.232 – 10.78.221.23310.78.221.233
11810.78.221.234/3110.78.221.234 – 10.78.221.23510.78.221.235
11910.78.221.236/3110.78.221.236 – 10.78.221.23710.78.221.237
12010.78.221.238/3110.78.221.238 – 10.78.221.23910.78.221.239
12110.78.221.240/3110.78.221.240 – 10.78.221.24110.78.221.241
12210.78.221.242/3110.78.221.242 – 10.78.221.24310.78.221.243
12310.78.221.244/3110.78.221.244 – 10.78.221.24510.78.221.245
12410.78.221.246/3110.78.221.246 – 10.78.221.24710.78.221.247
12510.78.221.248/3110.78.221.248 – 10.78.221.24910.78.221.249
12610.78.221.250/3110.78.221.250 – 10.78.221.25110.78.221.251
12710.78.221.252/3110.78.221.252 – 10.78.221.25310.78.221.253
12810.78.221.254/3110.78.221.254 – 10.78.221.25510.78.221.255
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 →