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)10.0.138.0/24
network10.0.138.0/24
broadcast10.0.138.255
first host10.0.138.1
last host10.0.138.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.0.138.0/24
address00001010.00000000.10001010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000000.10001010.00000000
broadcast00001010.00000000.10001010.11111111
green = network part, grey = host part
hex0x0a008a00
decimal167807488
reverse dns0.138.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:8a00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.138.0/3110.0.138.0 – 10.0.138.110.0.138.1
210.0.138.2/3110.0.138.2 – 10.0.138.310.0.138.3
310.0.138.4/3110.0.138.4 – 10.0.138.510.0.138.5
410.0.138.6/3110.0.138.6 – 10.0.138.710.0.138.7
510.0.138.8/3110.0.138.8 – 10.0.138.910.0.138.9
610.0.138.10/3110.0.138.10 – 10.0.138.1110.0.138.11
710.0.138.12/3110.0.138.12 – 10.0.138.1310.0.138.13
810.0.138.14/3110.0.138.14 – 10.0.138.1510.0.138.15
910.0.138.16/3110.0.138.16 – 10.0.138.1710.0.138.17
1010.0.138.18/3110.0.138.18 – 10.0.138.1910.0.138.19
1110.0.138.20/3110.0.138.20 – 10.0.138.2110.0.138.21
1210.0.138.22/3110.0.138.22 – 10.0.138.2310.0.138.23
1310.0.138.24/3110.0.138.24 – 10.0.138.2510.0.138.25
1410.0.138.26/3110.0.138.26 – 10.0.138.2710.0.138.27
1510.0.138.28/3110.0.138.28 – 10.0.138.2910.0.138.29
1610.0.138.30/3110.0.138.30 – 10.0.138.3110.0.138.31
1710.0.138.32/3110.0.138.32 – 10.0.138.3310.0.138.33
1810.0.138.34/3110.0.138.34 – 10.0.138.3510.0.138.35
1910.0.138.36/3110.0.138.36 – 10.0.138.3710.0.138.37
2010.0.138.38/3110.0.138.38 – 10.0.138.3910.0.138.39
2110.0.138.40/3110.0.138.40 – 10.0.138.4110.0.138.41
2210.0.138.42/3110.0.138.42 – 10.0.138.4310.0.138.43
2310.0.138.44/3110.0.138.44 – 10.0.138.4510.0.138.45
2410.0.138.46/3110.0.138.46 – 10.0.138.4710.0.138.47
2510.0.138.48/3110.0.138.48 – 10.0.138.4910.0.138.49
2610.0.138.50/3110.0.138.50 – 10.0.138.5110.0.138.51
2710.0.138.52/3110.0.138.52 – 10.0.138.5310.0.138.53
2810.0.138.54/3110.0.138.54 – 10.0.138.5510.0.138.55
2910.0.138.56/3110.0.138.56 – 10.0.138.5710.0.138.57
3010.0.138.58/3110.0.138.58 – 10.0.138.5910.0.138.59
3110.0.138.60/3110.0.138.60 – 10.0.138.6110.0.138.61
3210.0.138.62/3110.0.138.62 – 10.0.138.6310.0.138.63
3310.0.138.64/3110.0.138.64 – 10.0.138.6510.0.138.65
3410.0.138.66/3110.0.138.66 – 10.0.138.6710.0.138.67
3510.0.138.68/3110.0.138.68 – 10.0.138.6910.0.138.69
3610.0.138.70/3110.0.138.70 – 10.0.138.7110.0.138.71
3710.0.138.72/3110.0.138.72 – 10.0.138.7310.0.138.73
3810.0.138.74/3110.0.138.74 – 10.0.138.7510.0.138.75
3910.0.138.76/3110.0.138.76 – 10.0.138.7710.0.138.77
4010.0.138.78/3110.0.138.78 – 10.0.138.7910.0.138.79
4110.0.138.80/3110.0.138.80 – 10.0.138.8110.0.138.81
4210.0.138.82/3110.0.138.82 – 10.0.138.8310.0.138.83
4310.0.138.84/3110.0.138.84 – 10.0.138.8510.0.138.85
4410.0.138.86/3110.0.138.86 – 10.0.138.8710.0.138.87
4510.0.138.88/3110.0.138.88 – 10.0.138.8910.0.138.89
4610.0.138.90/3110.0.138.90 – 10.0.138.9110.0.138.91
4710.0.138.92/3110.0.138.92 – 10.0.138.9310.0.138.93
4810.0.138.94/3110.0.138.94 – 10.0.138.9510.0.138.95
4910.0.138.96/3110.0.138.96 – 10.0.138.9710.0.138.97
5010.0.138.98/3110.0.138.98 – 10.0.138.9910.0.138.99
5110.0.138.100/3110.0.138.100 – 10.0.138.10110.0.138.101
5210.0.138.102/3110.0.138.102 – 10.0.138.10310.0.138.103
5310.0.138.104/3110.0.138.104 – 10.0.138.10510.0.138.105
5410.0.138.106/3110.0.138.106 – 10.0.138.10710.0.138.107
5510.0.138.108/3110.0.138.108 – 10.0.138.10910.0.138.109
5610.0.138.110/3110.0.138.110 – 10.0.138.11110.0.138.111
5710.0.138.112/3110.0.138.112 – 10.0.138.11310.0.138.113
5810.0.138.114/3110.0.138.114 – 10.0.138.11510.0.138.115
5910.0.138.116/3110.0.138.116 – 10.0.138.11710.0.138.117
6010.0.138.118/3110.0.138.118 – 10.0.138.11910.0.138.119
6110.0.138.120/3110.0.138.120 – 10.0.138.12110.0.138.121
6210.0.138.122/3110.0.138.122 – 10.0.138.12310.0.138.123
6310.0.138.124/3110.0.138.124 – 10.0.138.12510.0.138.125
6410.0.138.126/3110.0.138.126 – 10.0.138.12710.0.138.127
6510.0.138.128/3110.0.138.128 – 10.0.138.12910.0.138.129
6610.0.138.130/3110.0.138.130 – 10.0.138.13110.0.138.131
6710.0.138.132/3110.0.138.132 – 10.0.138.13310.0.138.133
6810.0.138.134/3110.0.138.134 – 10.0.138.13510.0.138.135
6910.0.138.136/3110.0.138.136 – 10.0.138.13710.0.138.137
7010.0.138.138/3110.0.138.138 – 10.0.138.13910.0.138.139
7110.0.138.140/3110.0.138.140 – 10.0.138.14110.0.138.141
7210.0.138.142/3110.0.138.142 – 10.0.138.14310.0.138.143
7310.0.138.144/3110.0.138.144 – 10.0.138.14510.0.138.145
7410.0.138.146/3110.0.138.146 – 10.0.138.14710.0.138.147
7510.0.138.148/3110.0.138.148 – 10.0.138.14910.0.138.149
7610.0.138.150/3110.0.138.150 – 10.0.138.15110.0.138.151
7710.0.138.152/3110.0.138.152 – 10.0.138.15310.0.138.153
7810.0.138.154/3110.0.138.154 – 10.0.138.15510.0.138.155
7910.0.138.156/3110.0.138.156 – 10.0.138.15710.0.138.157
8010.0.138.158/3110.0.138.158 – 10.0.138.15910.0.138.159
8110.0.138.160/3110.0.138.160 – 10.0.138.16110.0.138.161
8210.0.138.162/3110.0.138.162 – 10.0.138.16310.0.138.163
8310.0.138.164/3110.0.138.164 – 10.0.138.16510.0.138.165
8410.0.138.166/3110.0.138.166 – 10.0.138.16710.0.138.167
8510.0.138.168/3110.0.138.168 – 10.0.138.16910.0.138.169
8610.0.138.170/3110.0.138.170 – 10.0.138.17110.0.138.171
8710.0.138.172/3110.0.138.172 – 10.0.138.17310.0.138.173
8810.0.138.174/3110.0.138.174 – 10.0.138.17510.0.138.175
8910.0.138.176/3110.0.138.176 – 10.0.138.17710.0.138.177
9010.0.138.178/3110.0.138.178 – 10.0.138.17910.0.138.179
9110.0.138.180/3110.0.138.180 – 10.0.138.18110.0.138.181
9210.0.138.182/3110.0.138.182 – 10.0.138.18310.0.138.183
9310.0.138.184/3110.0.138.184 – 10.0.138.18510.0.138.185
9410.0.138.186/3110.0.138.186 – 10.0.138.18710.0.138.187
9510.0.138.188/3110.0.138.188 – 10.0.138.18910.0.138.189
9610.0.138.190/3110.0.138.190 – 10.0.138.19110.0.138.191
9710.0.138.192/3110.0.138.192 – 10.0.138.19310.0.138.193
9810.0.138.194/3110.0.138.194 – 10.0.138.19510.0.138.195
9910.0.138.196/3110.0.138.196 – 10.0.138.19710.0.138.197
10010.0.138.198/3110.0.138.198 – 10.0.138.19910.0.138.199
10110.0.138.200/3110.0.138.200 – 10.0.138.20110.0.138.201
10210.0.138.202/3110.0.138.202 – 10.0.138.20310.0.138.203
10310.0.138.204/3110.0.138.204 – 10.0.138.20510.0.138.205
10410.0.138.206/3110.0.138.206 – 10.0.138.20710.0.138.207
10510.0.138.208/3110.0.138.208 – 10.0.138.20910.0.138.209
10610.0.138.210/3110.0.138.210 – 10.0.138.21110.0.138.211
10710.0.138.212/3110.0.138.212 – 10.0.138.21310.0.138.213
10810.0.138.214/3110.0.138.214 – 10.0.138.21510.0.138.215
10910.0.138.216/3110.0.138.216 – 10.0.138.21710.0.138.217
11010.0.138.218/3110.0.138.218 – 10.0.138.21910.0.138.219
11110.0.138.220/3110.0.138.220 – 10.0.138.22110.0.138.221
11210.0.138.222/3110.0.138.222 – 10.0.138.22310.0.138.223
11310.0.138.224/3110.0.138.224 – 10.0.138.22510.0.138.225
11410.0.138.226/3110.0.138.226 – 10.0.138.22710.0.138.227
11510.0.138.228/3110.0.138.228 – 10.0.138.22910.0.138.229
11610.0.138.230/3110.0.138.230 – 10.0.138.23110.0.138.231
11710.0.138.232/3110.0.138.232 – 10.0.138.23310.0.138.233
11810.0.138.234/3110.0.138.234 – 10.0.138.23510.0.138.235
11910.0.138.236/3110.0.138.236 – 10.0.138.23710.0.138.237
12010.0.138.238/3110.0.138.238 – 10.0.138.23910.0.138.239
12110.0.138.240/3110.0.138.240 – 10.0.138.24110.0.138.241
12210.0.138.242/3110.0.138.242 – 10.0.138.24310.0.138.243
12310.0.138.244/3110.0.138.244 – 10.0.138.24510.0.138.245
12410.0.138.246/3110.0.138.246 – 10.0.138.24710.0.138.247
12510.0.138.248/3110.0.138.248 – 10.0.138.24910.0.138.249
12610.0.138.250/3110.0.138.250 – 10.0.138.25110.0.138.251
12710.0.138.252/3110.0.138.252 – 10.0.138.25310.0.138.253
12810.0.138.254/3110.0.138.254 – 10.0.138.25510.0.138.255
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 →