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
private IP (RFC 1918)10.131.239.0/24
network10.131.239.0/24
broadcast10.131.239.255
first host10.131.239.1
last host10.131.239.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.131.239.0/24
address00001010.10000011.11101111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10000011.11101111.00000000
broadcast00001010.10000011.11101111.11111111
green = network part, grey = host part
hex0x0a83ef00
decimal176418560
reverse dns0.239.131.10.in-addr.arpa
ipv4-mapped::ffff:a83:ef00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.131.239.0/3110.131.239.0 – 10.131.239.110.131.239.1
210.131.239.2/3110.131.239.2 – 10.131.239.310.131.239.3
310.131.239.4/3110.131.239.4 – 10.131.239.510.131.239.5
410.131.239.6/3110.131.239.6 – 10.131.239.710.131.239.7
510.131.239.8/3110.131.239.8 – 10.131.239.910.131.239.9
610.131.239.10/3110.131.239.10 – 10.131.239.1110.131.239.11
710.131.239.12/3110.131.239.12 – 10.131.239.1310.131.239.13
810.131.239.14/3110.131.239.14 – 10.131.239.1510.131.239.15
910.131.239.16/3110.131.239.16 – 10.131.239.1710.131.239.17
1010.131.239.18/3110.131.239.18 – 10.131.239.1910.131.239.19
1110.131.239.20/3110.131.239.20 – 10.131.239.2110.131.239.21
1210.131.239.22/3110.131.239.22 – 10.131.239.2310.131.239.23
1310.131.239.24/3110.131.239.24 – 10.131.239.2510.131.239.25
1410.131.239.26/3110.131.239.26 – 10.131.239.2710.131.239.27
1510.131.239.28/3110.131.239.28 – 10.131.239.2910.131.239.29
1610.131.239.30/3110.131.239.30 – 10.131.239.3110.131.239.31
1710.131.239.32/3110.131.239.32 – 10.131.239.3310.131.239.33
1810.131.239.34/3110.131.239.34 – 10.131.239.3510.131.239.35
1910.131.239.36/3110.131.239.36 – 10.131.239.3710.131.239.37
2010.131.239.38/3110.131.239.38 – 10.131.239.3910.131.239.39
2110.131.239.40/3110.131.239.40 – 10.131.239.4110.131.239.41
2210.131.239.42/3110.131.239.42 – 10.131.239.4310.131.239.43
2310.131.239.44/3110.131.239.44 – 10.131.239.4510.131.239.45
2410.131.239.46/3110.131.239.46 – 10.131.239.4710.131.239.47
2510.131.239.48/3110.131.239.48 – 10.131.239.4910.131.239.49
2610.131.239.50/3110.131.239.50 – 10.131.239.5110.131.239.51
2710.131.239.52/3110.131.239.52 – 10.131.239.5310.131.239.53
2810.131.239.54/3110.131.239.54 – 10.131.239.5510.131.239.55
2910.131.239.56/3110.131.239.56 – 10.131.239.5710.131.239.57
3010.131.239.58/3110.131.239.58 – 10.131.239.5910.131.239.59
3110.131.239.60/3110.131.239.60 – 10.131.239.6110.131.239.61
3210.131.239.62/3110.131.239.62 – 10.131.239.6310.131.239.63
3310.131.239.64/3110.131.239.64 – 10.131.239.6510.131.239.65
3410.131.239.66/3110.131.239.66 – 10.131.239.6710.131.239.67
3510.131.239.68/3110.131.239.68 – 10.131.239.6910.131.239.69
3610.131.239.70/3110.131.239.70 – 10.131.239.7110.131.239.71
3710.131.239.72/3110.131.239.72 – 10.131.239.7310.131.239.73
3810.131.239.74/3110.131.239.74 – 10.131.239.7510.131.239.75
3910.131.239.76/3110.131.239.76 – 10.131.239.7710.131.239.77
4010.131.239.78/3110.131.239.78 – 10.131.239.7910.131.239.79
4110.131.239.80/3110.131.239.80 – 10.131.239.8110.131.239.81
4210.131.239.82/3110.131.239.82 – 10.131.239.8310.131.239.83
4310.131.239.84/3110.131.239.84 – 10.131.239.8510.131.239.85
4410.131.239.86/3110.131.239.86 – 10.131.239.8710.131.239.87
4510.131.239.88/3110.131.239.88 – 10.131.239.8910.131.239.89
4610.131.239.90/3110.131.239.90 – 10.131.239.9110.131.239.91
4710.131.239.92/3110.131.239.92 – 10.131.239.9310.131.239.93
4810.131.239.94/3110.131.239.94 – 10.131.239.9510.131.239.95
4910.131.239.96/3110.131.239.96 – 10.131.239.9710.131.239.97
5010.131.239.98/3110.131.239.98 – 10.131.239.9910.131.239.99
5110.131.239.100/3110.131.239.100 – 10.131.239.10110.131.239.101
5210.131.239.102/3110.131.239.102 – 10.131.239.10310.131.239.103
5310.131.239.104/3110.131.239.104 – 10.131.239.10510.131.239.105
5410.131.239.106/3110.131.239.106 – 10.131.239.10710.131.239.107
5510.131.239.108/3110.131.239.108 – 10.131.239.10910.131.239.109
5610.131.239.110/3110.131.239.110 – 10.131.239.11110.131.239.111
5710.131.239.112/3110.131.239.112 – 10.131.239.11310.131.239.113
5810.131.239.114/3110.131.239.114 – 10.131.239.11510.131.239.115
5910.131.239.116/3110.131.239.116 – 10.131.239.11710.131.239.117
6010.131.239.118/3110.131.239.118 – 10.131.239.11910.131.239.119
6110.131.239.120/3110.131.239.120 – 10.131.239.12110.131.239.121
6210.131.239.122/3110.131.239.122 – 10.131.239.12310.131.239.123
6310.131.239.124/3110.131.239.124 – 10.131.239.12510.131.239.125
6410.131.239.126/3110.131.239.126 – 10.131.239.12710.131.239.127
6510.131.239.128/3110.131.239.128 – 10.131.239.12910.131.239.129
6610.131.239.130/3110.131.239.130 – 10.131.239.13110.131.239.131
6710.131.239.132/3110.131.239.132 – 10.131.239.13310.131.239.133
6810.131.239.134/3110.131.239.134 – 10.131.239.13510.131.239.135
6910.131.239.136/3110.131.239.136 – 10.131.239.13710.131.239.137
7010.131.239.138/3110.131.239.138 – 10.131.239.13910.131.239.139
7110.131.239.140/3110.131.239.140 – 10.131.239.14110.131.239.141
7210.131.239.142/3110.131.239.142 – 10.131.239.14310.131.239.143
7310.131.239.144/3110.131.239.144 – 10.131.239.14510.131.239.145
7410.131.239.146/3110.131.239.146 – 10.131.239.14710.131.239.147
7510.131.239.148/3110.131.239.148 – 10.131.239.14910.131.239.149
7610.131.239.150/3110.131.239.150 – 10.131.239.15110.131.239.151
7710.131.239.152/3110.131.239.152 – 10.131.239.15310.131.239.153
7810.131.239.154/3110.131.239.154 – 10.131.239.15510.131.239.155
7910.131.239.156/3110.131.239.156 – 10.131.239.15710.131.239.157
8010.131.239.158/3110.131.239.158 – 10.131.239.15910.131.239.159
8110.131.239.160/3110.131.239.160 – 10.131.239.16110.131.239.161
8210.131.239.162/3110.131.239.162 – 10.131.239.16310.131.239.163
8310.131.239.164/3110.131.239.164 – 10.131.239.16510.131.239.165
8410.131.239.166/3110.131.239.166 – 10.131.239.16710.131.239.167
8510.131.239.168/3110.131.239.168 – 10.131.239.16910.131.239.169
8610.131.239.170/3110.131.239.170 – 10.131.239.17110.131.239.171
8710.131.239.172/3110.131.239.172 – 10.131.239.17310.131.239.173
8810.131.239.174/3110.131.239.174 – 10.131.239.17510.131.239.175
8910.131.239.176/3110.131.239.176 – 10.131.239.17710.131.239.177
9010.131.239.178/3110.131.239.178 – 10.131.239.17910.131.239.179
9110.131.239.180/3110.131.239.180 – 10.131.239.18110.131.239.181
9210.131.239.182/3110.131.239.182 – 10.131.239.18310.131.239.183
9310.131.239.184/3110.131.239.184 – 10.131.239.18510.131.239.185
9410.131.239.186/3110.131.239.186 – 10.131.239.18710.131.239.187
9510.131.239.188/3110.131.239.188 – 10.131.239.18910.131.239.189
9610.131.239.190/3110.131.239.190 – 10.131.239.19110.131.239.191
9710.131.239.192/3110.131.239.192 – 10.131.239.19310.131.239.193
9810.131.239.194/3110.131.239.194 – 10.131.239.19510.131.239.195
9910.131.239.196/3110.131.239.196 – 10.131.239.19710.131.239.197
10010.131.239.198/3110.131.239.198 – 10.131.239.19910.131.239.199
10110.131.239.200/3110.131.239.200 – 10.131.239.20110.131.239.201
10210.131.239.202/3110.131.239.202 – 10.131.239.20310.131.239.203
10310.131.239.204/3110.131.239.204 – 10.131.239.20510.131.239.205
10410.131.239.206/3110.131.239.206 – 10.131.239.20710.131.239.207
10510.131.239.208/3110.131.239.208 – 10.131.239.20910.131.239.209
10610.131.239.210/3110.131.239.210 – 10.131.239.21110.131.239.211
10710.131.239.212/3110.131.239.212 – 10.131.239.21310.131.239.213
10810.131.239.214/3110.131.239.214 – 10.131.239.21510.131.239.215
10910.131.239.216/3110.131.239.216 – 10.131.239.21710.131.239.217
11010.131.239.218/3110.131.239.218 – 10.131.239.21910.131.239.219
11110.131.239.220/3110.131.239.220 – 10.131.239.22110.131.239.221
11210.131.239.222/3110.131.239.222 – 10.131.239.22310.131.239.223
11310.131.239.224/3110.131.239.224 – 10.131.239.22510.131.239.225
11410.131.239.226/3110.131.239.226 – 10.131.239.22710.131.239.227
11510.131.239.228/3110.131.239.228 – 10.131.239.22910.131.239.229
11610.131.239.230/3110.131.239.230 – 10.131.239.23110.131.239.231
11710.131.239.232/3110.131.239.232 – 10.131.239.23310.131.239.233
11810.131.239.234/3110.131.239.234 – 10.131.239.23510.131.239.235
11910.131.239.236/3110.131.239.236 – 10.131.239.23710.131.239.237
12010.131.239.238/3110.131.239.238 – 10.131.239.23910.131.239.239
12110.131.239.240/3110.131.239.240 – 10.131.239.24110.131.239.241
12210.131.239.242/3110.131.239.242 – 10.131.239.24310.131.239.243
12310.131.239.244/3110.131.239.244 – 10.131.239.24510.131.239.245
12410.131.239.246/3110.131.239.246 – 10.131.239.24710.131.239.247
12510.131.239.248/3110.131.239.248 – 10.131.239.24910.131.239.249
12610.131.239.250/3110.131.239.250 – 10.131.239.25110.131.239.251
12710.131.239.252/3110.131.239.252 – 10.131.239.25310.131.239.253
12810.131.239.254/3110.131.239.254 – 10.131.239.25510.131.239.255
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 →