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)10.0.239.0/24
network10.0.239.0/24
broadcast10.0.239.255
first host10.0.239.1
last host10.0.239.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.0.239.0/24
address00001010.00000000.11101111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000000.11101111.00000000
broadcast00001010.00000000.11101111.11111111
green = network part, grey = host part
hex0x0a00ef00
decimal167833344
reverse dns0.239.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:ef00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.239.0/3110.0.239.0 – 10.0.239.110.0.239.1
210.0.239.2/3110.0.239.2 – 10.0.239.310.0.239.3
310.0.239.4/3110.0.239.4 – 10.0.239.510.0.239.5
410.0.239.6/3110.0.239.6 – 10.0.239.710.0.239.7
510.0.239.8/3110.0.239.8 – 10.0.239.910.0.239.9
610.0.239.10/3110.0.239.10 – 10.0.239.1110.0.239.11
710.0.239.12/3110.0.239.12 – 10.0.239.1310.0.239.13
810.0.239.14/3110.0.239.14 – 10.0.239.1510.0.239.15
910.0.239.16/3110.0.239.16 – 10.0.239.1710.0.239.17
1010.0.239.18/3110.0.239.18 – 10.0.239.1910.0.239.19
1110.0.239.20/3110.0.239.20 – 10.0.239.2110.0.239.21
1210.0.239.22/3110.0.239.22 – 10.0.239.2310.0.239.23
1310.0.239.24/3110.0.239.24 – 10.0.239.2510.0.239.25
1410.0.239.26/3110.0.239.26 – 10.0.239.2710.0.239.27
1510.0.239.28/3110.0.239.28 – 10.0.239.2910.0.239.29
1610.0.239.30/3110.0.239.30 – 10.0.239.3110.0.239.31
1710.0.239.32/3110.0.239.32 – 10.0.239.3310.0.239.33
1810.0.239.34/3110.0.239.34 – 10.0.239.3510.0.239.35
1910.0.239.36/3110.0.239.36 – 10.0.239.3710.0.239.37
2010.0.239.38/3110.0.239.38 – 10.0.239.3910.0.239.39
2110.0.239.40/3110.0.239.40 – 10.0.239.4110.0.239.41
2210.0.239.42/3110.0.239.42 – 10.0.239.4310.0.239.43
2310.0.239.44/3110.0.239.44 – 10.0.239.4510.0.239.45
2410.0.239.46/3110.0.239.46 – 10.0.239.4710.0.239.47
2510.0.239.48/3110.0.239.48 – 10.0.239.4910.0.239.49
2610.0.239.50/3110.0.239.50 – 10.0.239.5110.0.239.51
2710.0.239.52/3110.0.239.52 – 10.0.239.5310.0.239.53
2810.0.239.54/3110.0.239.54 – 10.0.239.5510.0.239.55
2910.0.239.56/3110.0.239.56 – 10.0.239.5710.0.239.57
3010.0.239.58/3110.0.239.58 – 10.0.239.5910.0.239.59
3110.0.239.60/3110.0.239.60 – 10.0.239.6110.0.239.61
3210.0.239.62/3110.0.239.62 – 10.0.239.6310.0.239.63
3310.0.239.64/3110.0.239.64 – 10.0.239.6510.0.239.65
3410.0.239.66/3110.0.239.66 – 10.0.239.6710.0.239.67
3510.0.239.68/3110.0.239.68 – 10.0.239.6910.0.239.69
3610.0.239.70/3110.0.239.70 – 10.0.239.7110.0.239.71
3710.0.239.72/3110.0.239.72 – 10.0.239.7310.0.239.73
3810.0.239.74/3110.0.239.74 – 10.0.239.7510.0.239.75
3910.0.239.76/3110.0.239.76 – 10.0.239.7710.0.239.77
4010.0.239.78/3110.0.239.78 – 10.0.239.7910.0.239.79
4110.0.239.80/3110.0.239.80 – 10.0.239.8110.0.239.81
4210.0.239.82/3110.0.239.82 – 10.0.239.8310.0.239.83
4310.0.239.84/3110.0.239.84 – 10.0.239.8510.0.239.85
4410.0.239.86/3110.0.239.86 – 10.0.239.8710.0.239.87
4510.0.239.88/3110.0.239.88 – 10.0.239.8910.0.239.89
4610.0.239.90/3110.0.239.90 – 10.0.239.9110.0.239.91
4710.0.239.92/3110.0.239.92 – 10.0.239.9310.0.239.93
4810.0.239.94/3110.0.239.94 – 10.0.239.9510.0.239.95
4910.0.239.96/3110.0.239.96 – 10.0.239.9710.0.239.97
5010.0.239.98/3110.0.239.98 – 10.0.239.9910.0.239.99
5110.0.239.100/3110.0.239.100 – 10.0.239.10110.0.239.101
5210.0.239.102/3110.0.239.102 – 10.0.239.10310.0.239.103
5310.0.239.104/3110.0.239.104 – 10.0.239.10510.0.239.105
5410.0.239.106/3110.0.239.106 – 10.0.239.10710.0.239.107
5510.0.239.108/3110.0.239.108 – 10.0.239.10910.0.239.109
5610.0.239.110/3110.0.239.110 – 10.0.239.11110.0.239.111
5710.0.239.112/3110.0.239.112 – 10.0.239.11310.0.239.113
5810.0.239.114/3110.0.239.114 – 10.0.239.11510.0.239.115
5910.0.239.116/3110.0.239.116 – 10.0.239.11710.0.239.117
6010.0.239.118/3110.0.239.118 – 10.0.239.11910.0.239.119
6110.0.239.120/3110.0.239.120 – 10.0.239.12110.0.239.121
6210.0.239.122/3110.0.239.122 – 10.0.239.12310.0.239.123
6310.0.239.124/3110.0.239.124 – 10.0.239.12510.0.239.125
6410.0.239.126/3110.0.239.126 – 10.0.239.12710.0.239.127
6510.0.239.128/3110.0.239.128 – 10.0.239.12910.0.239.129
6610.0.239.130/3110.0.239.130 – 10.0.239.13110.0.239.131
6710.0.239.132/3110.0.239.132 – 10.0.239.13310.0.239.133
6810.0.239.134/3110.0.239.134 – 10.0.239.13510.0.239.135
6910.0.239.136/3110.0.239.136 – 10.0.239.13710.0.239.137
7010.0.239.138/3110.0.239.138 – 10.0.239.13910.0.239.139
7110.0.239.140/3110.0.239.140 – 10.0.239.14110.0.239.141
7210.0.239.142/3110.0.239.142 – 10.0.239.14310.0.239.143
7310.0.239.144/3110.0.239.144 – 10.0.239.14510.0.239.145
7410.0.239.146/3110.0.239.146 – 10.0.239.14710.0.239.147
7510.0.239.148/3110.0.239.148 – 10.0.239.14910.0.239.149
7610.0.239.150/3110.0.239.150 – 10.0.239.15110.0.239.151
7710.0.239.152/3110.0.239.152 – 10.0.239.15310.0.239.153
7810.0.239.154/3110.0.239.154 – 10.0.239.15510.0.239.155
7910.0.239.156/3110.0.239.156 – 10.0.239.15710.0.239.157
8010.0.239.158/3110.0.239.158 – 10.0.239.15910.0.239.159
8110.0.239.160/3110.0.239.160 – 10.0.239.16110.0.239.161
8210.0.239.162/3110.0.239.162 – 10.0.239.16310.0.239.163
8310.0.239.164/3110.0.239.164 – 10.0.239.16510.0.239.165
8410.0.239.166/3110.0.239.166 – 10.0.239.16710.0.239.167
8510.0.239.168/3110.0.239.168 – 10.0.239.16910.0.239.169
8610.0.239.170/3110.0.239.170 – 10.0.239.17110.0.239.171
8710.0.239.172/3110.0.239.172 – 10.0.239.17310.0.239.173
8810.0.239.174/3110.0.239.174 – 10.0.239.17510.0.239.175
8910.0.239.176/3110.0.239.176 – 10.0.239.17710.0.239.177
9010.0.239.178/3110.0.239.178 – 10.0.239.17910.0.239.179
9110.0.239.180/3110.0.239.180 – 10.0.239.18110.0.239.181
9210.0.239.182/3110.0.239.182 – 10.0.239.18310.0.239.183
9310.0.239.184/3110.0.239.184 – 10.0.239.18510.0.239.185
9410.0.239.186/3110.0.239.186 – 10.0.239.18710.0.239.187
9510.0.239.188/3110.0.239.188 – 10.0.239.18910.0.239.189
9610.0.239.190/3110.0.239.190 – 10.0.239.19110.0.239.191
9710.0.239.192/3110.0.239.192 – 10.0.239.19310.0.239.193
9810.0.239.194/3110.0.239.194 – 10.0.239.19510.0.239.195
9910.0.239.196/3110.0.239.196 – 10.0.239.19710.0.239.197
10010.0.239.198/3110.0.239.198 – 10.0.239.19910.0.239.199
10110.0.239.200/3110.0.239.200 – 10.0.239.20110.0.239.201
10210.0.239.202/3110.0.239.202 – 10.0.239.20310.0.239.203
10310.0.239.204/3110.0.239.204 – 10.0.239.20510.0.239.205
10410.0.239.206/3110.0.239.206 – 10.0.239.20710.0.239.207
10510.0.239.208/3110.0.239.208 – 10.0.239.20910.0.239.209
10610.0.239.210/3110.0.239.210 – 10.0.239.21110.0.239.211
10710.0.239.212/3110.0.239.212 – 10.0.239.21310.0.239.213
10810.0.239.214/3110.0.239.214 – 10.0.239.21510.0.239.215
10910.0.239.216/3110.0.239.216 – 10.0.239.21710.0.239.217
11010.0.239.218/3110.0.239.218 – 10.0.239.21910.0.239.219
11110.0.239.220/3110.0.239.220 – 10.0.239.22110.0.239.221
11210.0.239.222/3110.0.239.222 – 10.0.239.22310.0.239.223
11310.0.239.224/3110.0.239.224 – 10.0.239.22510.0.239.225
11410.0.239.226/3110.0.239.226 – 10.0.239.22710.0.239.227
11510.0.239.228/3110.0.239.228 – 10.0.239.22910.0.239.229
11610.0.239.230/3110.0.239.230 – 10.0.239.23110.0.239.231
11710.0.239.232/3110.0.239.232 – 10.0.239.23310.0.239.233
11810.0.239.234/3110.0.239.234 – 10.0.239.23510.0.239.235
11910.0.239.236/3110.0.239.236 – 10.0.239.23710.0.239.237
12010.0.239.238/3110.0.239.238 – 10.0.239.23910.0.239.239
12110.0.239.240/3110.0.239.240 – 10.0.239.24110.0.239.241
12210.0.239.242/3110.0.239.242 – 10.0.239.24310.0.239.243
12310.0.239.244/3110.0.239.244 – 10.0.239.24510.0.239.245
12410.0.239.246/3110.0.239.246 – 10.0.239.24710.0.239.247
12510.0.239.248/3110.0.239.248 – 10.0.239.24910.0.239.249
12610.0.239.250/3110.0.239.250 – 10.0.239.25110.0.239.251
12710.0.239.252/3110.0.239.252 – 10.0.239.25310.0.239.253
12810.0.239.254/3110.0.239.254 – 10.0.239.25510.0.239.255
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 →