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)10.0.139.0/24
network10.0.139.0/24
broadcast10.0.139.255
first host10.0.139.1
last host10.0.139.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.0.139.0/24
address00001010.00000000.10001011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000000.10001011.00000000
broadcast00001010.00000000.10001011.11111111
green = network part, grey = host part
hex0x0a008b00
decimal167807744
reverse dns0.139.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:8b00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.139.0/3110.0.139.0 – 10.0.139.110.0.139.1
210.0.139.2/3110.0.139.2 – 10.0.139.310.0.139.3
310.0.139.4/3110.0.139.4 – 10.0.139.510.0.139.5
410.0.139.6/3110.0.139.6 – 10.0.139.710.0.139.7
510.0.139.8/3110.0.139.8 – 10.0.139.910.0.139.9
610.0.139.10/3110.0.139.10 – 10.0.139.1110.0.139.11
710.0.139.12/3110.0.139.12 – 10.0.139.1310.0.139.13
810.0.139.14/3110.0.139.14 – 10.0.139.1510.0.139.15
910.0.139.16/3110.0.139.16 – 10.0.139.1710.0.139.17
1010.0.139.18/3110.0.139.18 – 10.0.139.1910.0.139.19
1110.0.139.20/3110.0.139.20 – 10.0.139.2110.0.139.21
1210.0.139.22/3110.0.139.22 – 10.0.139.2310.0.139.23
1310.0.139.24/3110.0.139.24 – 10.0.139.2510.0.139.25
1410.0.139.26/3110.0.139.26 – 10.0.139.2710.0.139.27
1510.0.139.28/3110.0.139.28 – 10.0.139.2910.0.139.29
1610.0.139.30/3110.0.139.30 – 10.0.139.3110.0.139.31
1710.0.139.32/3110.0.139.32 – 10.0.139.3310.0.139.33
1810.0.139.34/3110.0.139.34 – 10.0.139.3510.0.139.35
1910.0.139.36/3110.0.139.36 – 10.0.139.3710.0.139.37
2010.0.139.38/3110.0.139.38 – 10.0.139.3910.0.139.39
2110.0.139.40/3110.0.139.40 – 10.0.139.4110.0.139.41
2210.0.139.42/3110.0.139.42 – 10.0.139.4310.0.139.43
2310.0.139.44/3110.0.139.44 – 10.0.139.4510.0.139.45
2410.0.139.46/3110.0.139.46 – 10.0.139.4710.0.139.47
2510.0.139.48/3110.0.139.48 – 10.0.139.4910.0.139.49
2610.0.139.50/3110.0.139.50 – 10.0.139.5110.0.139.51
2710.0.139.52/3110.0.139.52 – 10.0.139.5310.0.139.53
2810.0.139.54/3110.0.139.54 – 10.0.139.5510.0.139.55
2910.0.139.56/3110.0.139.56 – 10.0.139.5710.0.139.57
3010.0.139.58/3110.0.139.58 – 10.0.139.5910.0.139.59
3110.0.139.60/3110.0.139.60 – 10.0.139.6110.0.139.61
3210.0.139.62/3110.0.139.62 – 10.0.139.6310.0.139.63
3310.0.139.64/3110.0.139.64 – 10.0.139.6510.0.139.65
3410.0.139.66/3110.0.139.66 – 10.0.139.6710.0.139.67
3510.0.139.68/3110.0.139.68 – 10.0.139.6910.0.139.69
3610.0.139.70/3110.0.139.70 – 10.0.139.7110.0.139.71
3710.0.139.72/3110.0.139.72 – 10.0.139.7310.0.139.73
3810.0.139.74/3110.0.139.74 – 10.0.139.7510.0.139.75
3910.0.139.76/3110.0.139.76 – 10.0.139.7710.0.139.77
4010.0.139.78/3110.0.139.78 – 10.0.139.7910.0.139.79
4110.0.139.80/3110.0.139.80 – 10.0.139.8110.0.139.81
4210.0.139.82/3110.0.139.82 – 10.0.139.8310.0.139.83
4310.0.139.84/3110.0.139.84 – 10.0.139.8510.0.139.85
4410.0.139.86/3110.0.139.86 – 10.0.139.8710.0.139.87
4510.0.139.88/3110.0.139.88 – 10.0.139.8910.0.139.89
4610.0.139.90/3110.0.139.90 – 10.0.139.9110.0.139.91
4710.0.139.92/3110.0.139.92 – 10.0.139.9310.0.139.93
4810.0.139.94/3110.0.139.94 – 10.0.139.9510.0.139.95
4910.0.139.96/3110.0.139.96 – 10.0.139.9710.0.139.97
5010.0.139.98/3110.0.139.98 – 10.0.139.9910.0.139.99
5110.0.139.100/3110.0.139.100 – 10.0.139.10110.0.139.101
5210.0.139.102/3110.0.139.102 – 10.0.139.10310.0.139.103
5310.0.139.104/3110.0.139.104 – 10.0.139.10510.0.139.105
5410.0.139.106/3110.0.139.106 – 10.0.139.10710.0.139.107
5510.0.139.108/3110.0.139.108 – 10.0.139.10910.0.139.109
5610.0.139.110/3110.0.139.110 – 10.0.139.11110.0.139.111
5710.0.139.112/3110.0.139.112 – 10.0.139.11310.0.139.113
5810.0.139.114/3110.0.139.114 – 10.0.139.11510.0.139.115
5910.0.139.116/3110.0.139.116 – 10.0.139.11710.0.139.117
6010.0.139.118/3110.0.139.118 – 10.0.139.11910.0.139.119
6110.0.139.120/3110.0.139.120 – 10.0.139.12110.0.139.121
6210.0.139.122/3110.0.139.122 – 10.0.139.12310.0.139.123
6310.0.139.124/3110.0.139.124 – 10.0.139.12510.0.139.125
6410.0.139.126/3110.0.139.126 – 10.0.139.12710.0.139.127
6510.0.139.128/3110.0.139.128 – 10.0.139.12910.0.139.129
6610.0.139.130/3110.0.139.130 – 10.0.139.13110.0.139.131
6710.0.139.132/3110.0.139.132 – 10.0.139.13310.0.139.133
6810.0.139.134/3110.0.139.134 – 10.0.139.13510.0.139.135
6910.0.139.136/3110.0.139.136 – 10.0.139.13710.0.139.137
7010.0.139.138/3110.0.139.138 – 10.0.139.13910.0.139.139
7110.0.139.140/3110.0.139.140 – 10.0.139.14110.0.139.141
7210.0.139.142/3110.0.139.142 – 10.0.139.14310.0.139.143
7310.0.139.144/3110.0.139.144 – 10.0.139.14510.0.139.145
7410.0.139.146/3110.0.139.146 – 10.0.139.14710.0.139.147
7510.0.139.148/3110.0.139.148 – 10.0.139.14910.0.139.149
7610.0.139.150/3110.0.139.150 – 10.0.139.15110.0.139.151
7710.0.139.152/3110.0.139.152 – 10.0.139.15310.0.139.153
7810.0.139.154/3110.0.139.154 – 10.0.139.15510.0.139.155
7910.0.139.156/3110.0.139.156 – 10.0.139.15710.0.139.157
8010.0.139.158/3110.0.139.158 – 10.0.139.15910.0.139.159
8110.0.139.160/3110.0.139.160 – 10.0.139.16110.0.139.161
8210.0.139.162/3110.0.139.162 – 10.0.139.16310.0.139.163
8310.0.139.164/3110.0.139.164 – 10.0.139.16510.0.139.165
8410.0.139.166/3110.0.139.166 – 10.0.139.16710.0.139.167
8510.0.139.168/3110.0.139.168 – 10.0.139.16910.0.139.169
8610.0.139.170/3110.0.139.170 – 10.0.139.17110.0.139.171
8710.0.139.172/3110.0.139.172 – 10.0.139.17310.0.139.173
8810.0.139.174/3110.0.139.174 – 10.0.139.17510.0.139.175
8910.0.139.176/3110.0.139.176 – 10.0.139.17710.0.139.177
9010.0.139.178/3110.0.139.178 – 10.0.139.17910.0.139.179
9110.0.139.180/3110.0.139.180 – 10.0.139.18110.0.139.181
9210.0.139.182/3110.0.139.182 – 10.0.139.18310.0.139.183
9310.0.139.184/3110.0.139.184 – 10.0.139.18510.0.139.185
9410.0.139.186/3110.0.139.186 – 10.0.139.18710.0.139.187
9510.0.139.188/3110.0.139.188 – 10.0.139.18910.0.139.189
9610.0.139.190/3110.0.139.190 – 10.0.139.19110.0.139.191
9710.0.139.192/3110.0.139.192 – 10.0.139.19310.0.139.193
9810.0.139.194/3110.0.139.194 – 10.0.139.19510.0.139.195
9910.0.139.196/3110.0.139.196 – 10.0.139.19710.0.139.197
10010.0.139.198/3110.0.139.198 – 10.0.139.19910.0.139.199
10110.0.139.200/3110.0.139.200 – 10.0.139.20110.0.139.201
10210.0.139.202/3110.0.139.202 – 10.0.139.20310.0.139.203
10310.0.139.204/3110.0.139.204 – 10.0.139.20510.0.139.205
10410.0.139.206/3110.0.139.206 – 10.0.139.20710.0.139.207
10510.0.139.208/3110.0.139.208 – 10.0.139.20910.0.139.209
10610.0.139.210/3110.0.139.210 – 10.0.139.21110.0.139.211
10710.0.139.212/3110.0.139.212 – 10.0.139.21310.0.139.213
10810.0.139.214/3110.0.139.214 – 10.0.139.21510.0.139.215
10910.0.139.216/3110.0.139.216 – 10.0.139.21710.0.139.217
11010.0.139.218/3110.0.139.218 – 10.0.139.21910.0.139.219
11110.0.139.220/3110.0.139.220 – 10.0.139.22110.0.139.221
11210.0.139.222/3110.0.139.222 – 10.0.139.22310.0.139.223
11310.0.139.224/3110.0.139.224 – 10.0.139.22510.0.139.225
11410.0.139.226/3110.0.139.226 – 10.0.139.22710.0.139.227
11510.0.139.228/3110.0.139.228 – 10.0.139.22910.0.139.229
11610.0.139.230/3110.0.139.230 – 10.0.139.23110.0.139.231
11710.0.139.232/3110.0.139.232 – 10.0.139.23310.0.139.233
11810.0.139.234/3110.0.139.234 – 10.0.139.23510.0.139.235
11910.0.139.236/3110.0.139.236 – 10.0.139.23710.0.139.237
12010.0.139.238/3110.0.139.238 – 10.0.139.23910.0.139.239
12110.0.139.240/3110.0.139.240 – 10.0.139.24110.0.139.241
12210.0.139.242/3110.0.139.242 – 10.0.139.24310.0.139.243
12310.0.139.244/3110.0.139.244 – 10.0.139.24510.0.139.245
12410.0.139.246/3110.0.139.246 – 10.0.139.24710.0.139.247
12510.0.139.248/3110.0.139.248 – 10.0.139.24910.0.139.249
12610.0.139.250/3110.0.139.250 – 10.0.139.25110.0.139.251
12710.0.139.252/3110.0.139.252 – 10.0.139.25310.0.139.253
12810.0.139.254/3110.0.139.254 – 10.0.139.25510.0.139.255
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 →