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)10.167.203.0/24
network10.167.203.0/24
broadcast10.167.203.255
first host10.167.203.1
last host10.167.203.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.167.203.0/24
address00001010.10100111.11001011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10100111.11001011.00000000
broadcast00001010.10100111.11001011.11111111
green = network part, grey = host part
hex0x0aa7cb00
decimal178768640
reverse dns0.203.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:cb00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.203.0/3110.167.203.0 – 10.167.203.110.167.203.1
210.167.203.2/3110.167.203.2 – 10.167.203.310.167.203.3
310.167.203.4/3110.167.203.4 – 10.167.203.510.167.203.5
410.167.203.6/3110.167.203.6 – 10.167.203.710.167.203.7
510.167.203.8/3110.167.203.8 – 10.167.203.910.167.203.9
610.167.203.10/3110.167.203.10 – 10.167.203.1110.167.203.11
710.167.203.12/3110.167.203.12 – 10.167.203.1310.167.203.13
810.167.203.14/3110.167.203.14 – 10.167.203.1510.167.203.15
910.167.203.16/3110.167.203.16 – 10.167.203.1710.167.203.17
1010.167.203.18/3110.167.203.18 – 10.167.203.1910.167.203.19
1110.167.203.20/3110.167.203.20 – 10.167.203.2110.167.203.21
1210.167.203.22/3110.167.203.22 – 10.167.203.2310.167.203.23
1310.167.203.24/3110.167.203.24 – 10.167.203.2510.167.203.25
1410.167.203.26/3110.167.203.26 – 10.167.203.2710.167.203.27
1510.167.203.28/3110.167.203.28 – 10.167.203.2910.167.203.29
1610.167.203.30/3110.167.203.30 – 10.167.203.3110.167.203.31
1710.167.203.32/3110.167.203.32 – 10.167.203.3310.167.203.33
1810.167.203.34/3110.167.203.34 – 10.167.203.3510.167.203.35
1910.167.203.36/3110.167.203.36 – 10.167.203.3710.167.203.37
2010.167.203.38/3110.167.203.38 – 10.167.203.3910.167.203.39
2110.167.203.40/3110.167.203.40 – 10.167.203.4110.167.203.41
2210.167.203.42/3110.167.203.42 – 10.167.203.4310.167.203.43
2310.167.203.44/3110.167.203.44 – 10.167.203.4510.167.203.45
2410.167.203.46/3110.167.203.46 – 10.167.203.4710.167.203.47
2510.167.203.48/3110.167.203.48 – 10.167.203.4910.167.203.49
2610.167.203.50/3110.167.203.50 – 10.167.203.5110.167.203.51
2710.167.203.52/3110.167.203.52 – 10.167.203.5310.167.203.53
2810.167.203.54/3110.167.203.54 – 10.167.203.5510.167.203.55
2910.167.203.56/3110.167.203.56 – 10.167.203.5710.167.203.57
3010.167.203.58/3110.167.203.58 – 10.167.203.5910.167.203.59
3110.167.203.60/3110.167.203.60 – 10.167.203.6110.167.203.61
3210.167.203.62/3110.167.203.62 – 10.167.203.6310.167.203.63
3310.167.203.64/3110.167.203.64 – 10.167.203.6510.167.203.65
3410.167.203.66/3110.167.203.66 – 10.167.203.6710.167.203.67
3510.167.203.68/3110.167.203.68 – 10.167.203.6910.167.203.69
3610.167.203.70/3110.167.203.70 – 10.167.203.7110.167.203.71
3710.167.203.72/3110.167.203.72 – 10.167.203.7310.167.203.73
3810.167.203.74/3110.167.203.74 – 10.167.203.7510.167.203.75
3910.167.203.76/3110.167.203.76 – 10.167.203.7710.167.203.77
4010.167.203.78/3110.167.203.78 – 10.167.203.7910.167.203.79
4110.167.203.80/3110.167.203.80 – 10.167.203.8110.167.203.81
4210.167.203.82/3110.167.203.82 – 10.167.203.8310.167.203.83
4310.167.203.84/3110.167.203.84 – 10.167.203.8510.167.203.85
4410.167.203.86/3110.167.203.86 – 10.167.203.8710.167.203.87
4510.167.203.88/3110.167.203.88 – 10.167.203.8910.167.203.89
4610.167.203.90/3110.167.203.90 – 10.167.203.9110.167.203.91
4710.167.203.92/3110.167.203.92 – 10.167.203.9310.167.203.93
4810.167.203.94/3110.167.203.94 – 10.167.203.9510.167.203.95
4910.167.203.96/3110.167.203.96 – 10.167.203.9710.167.203.97
5010.167.203.98/3110.167.203.98 – 10.167.203.9910.167.203.99
5110.167.203.100/3110.167.203.100 – 10.167.203.10110.167.203.101
5210.167.203.102/3110.167.203.102 – 10.167.203.10310.167.203.103
5310.167.203.104/3110.167.203.104 – 10.167.203.10510.167.203.105
5410.167.203.106/3110.167.203.106 – 10.167.203.10710.167.203.107
5510.167.203.108/3110.167.203.108 – 10.167.203.10910.167.203.109
5610.167.203.110/3110.167.203.110 – 10.167.203.11110.167.203.111
5710.167.203.112/3110.167.203.112 – 10.167.203.11310.167.203.113
5810.167.203.114/3110.167.203.114 – 10.167.203.11510.167.203.115
5910.167.203.116/3110.167.203.116 – 10.167.203.11710.167.203.117
6010.167.203.118/3110.167.203.118 – 10.167.203.11910.167.203.119
6110.167.203.120/3110.167.203.120 – 10.167.203.12110.167.203.121
6210.167.203.122/3110.167.203.122 – 10.167.203.12310.167.203.123
6310.167.203.124/3110.167.203.124 – 10.167.203.12510.167.203.125
6410.167.203.126/3110.167.203.126 – 10.167.203.12710.167.203.127
6510.167.203.128/3110.167.203.128 – 10.167.203.12910.167.203.129
6610.167.203.130/3110.167.203.130 – 10.167.203.13110.167.203.131
6710.167.203.132/3110.167.203.132 – 10.167.203.13310.167.203.133
6810.167.203.134/3110.167.203.134 – 10.167.203.13510.167.203.135
6910.167.203.136/3110.167.203.136 – 10.167.203.13710.167.203.137
7010.167.203.138/3110.167.203.138 – 10.167.203.13910.167.203.139
7110.167.203.140/3110.167.203.140 – 10.167.203.14110.167.203.141
7210.167.203.142/3110.167.203.142 – 10.167.203.14310.167.203.143
7310.167.203.144/3110.167.203.144 – 10.167.203.14510.167.203.145
7410.167.203.146/3110.167.203.146 – 10.167.203.14710.167.203.147
7510.167.203.148/3110.167.203.148 – 10.167.203.14910.167.203.149
7610.167.203.150/3110.167.203.150 – 10.167.203.15110.167.203.151
7710.167.203.152/3110.167.203.152 – 10.167.203.15310.167.203.153
7810.167.203.154/3110.167.203.154 – 10.167.203.15510.167.203.155
7910.167.203.156/3110.167.203.156 – 10.167.203.15710.167.203.157
8010.167.203.158/3110.167.203.158 – 10.167.203.15910.167.203.159
8110.167.203.160/3110.167.203.160 – 10.167.203.16110.167.203.161
8210.167.203.162/3110.167.203.162 – 10.167.203.16310.167.203.163
8310.167.203.164/3110.167.203.164 – 10.167.203.16510.167.203.165
8410.167.203.166/3110.167.203.166 – 10.167.203.16710.167.203.167
8510.167.203.168/3110.167.203.168 – 10.167.203.16910.167.203.169
8610.167.203.170/3110.167.203.170 – 10.167.203.17110.167.203.171
8710.167.203.172/3110.167.203.172 – 10.167.203.17310.167.203.173
8810.167.203.174/3110.167.203.174 – 10.167.203.17510.167.203.175
8910.167.203.176/3110.167.203.176 – 10.167.203.17710.167.203.177
9010.167.203.178/3110.167.203.178 – 10.167.203.17910.167.203.179
9110.167.203.180/3110.167.203.180 – 10.167.203.18110.167.203.181
9210.167.203.182/3110.167.203.182 – 10.167.203.18310.167.203.183
9310.167.203.184/3110.167.203.184 – 10.167.203.18510.167.203.185
9410.167.203.186/3110.167.203.186 – 10.167.203.18710.167.203.187
9510.167.203.188/3110.167.203.188 – 10.167.203.18910.167.203.189
9610.167.203.190/3110.167.203.190 – 10.167.203.19110.167.203.191
9710.167.203.192/3110.167.203.192 – 10.167.203.19310.167.203.193
9810.167.203.194/3110.167.203.194 – 10.167.203.19510.167.203.195
9910.167.203.196/3110.167.203.196 – 10.167.203.19710.167.203.197
10010.167.203.198/3110.167.203.198 – 10.167.203.19910.167.203.199
10110.167.203.200/3110.167.203.200 – 10.167.203.20110.167.203.201
10210.167.203.202/3110.167.203.202 – 10.167.203.20310.167.203.203
10310.167.203.204/3110.167.203.204 – 10.167.203.20510.167.203.205
10410.167.203.206/3110.167.203.206 – 10.167.203.20710.167.203.207
10510.167.203.208/3110.167.203.208 – 10.167.203.20910.167.203.209
10610.167.203.210/3110.167.203.210 – 10.167.203.21110.167.203.211
10710.167.203.212/3110.167.203.212 – 10.167.203.21310.167.203.213
10810.167.203.214/3110.167.203.214 – 10.167.203.21510.167.203.215
10910.167.203.216/3110.167.203.216 – 10.167.203.21710.167.203.217
11010.167.203.218/3110.167.203.218 – 10.167.203.21910.167.203.219
11110.167.203.220/3110.167.203.220 – 10.167.203.22110.167.203.221
11210.167.203.222/3110.167.203.222 – 10.167.203.22310.167.203.223
11310.167.203.224/3110.167.203.224 – 10.167.203.22510.167.203.225
11410.167.203.226/3110.167.203.226 – 10.167.203.22710.167.203.227
11510.167.203.228/3110.167.203.228 – 10.167.203.22910.167.203.229
11610.167.203.230/3110.167.203.230 – 10.167.203.23110.167.203.231
11710.167.203.232/3110.167.203.232 – 10.167.203.23310.167.203.233
11810.167.203.234/3110.167.203.234 – 10.167.203.23510.167.203.235
11910.167.203.236/3110.167.203.236 – 10.167.203.23710.167.203.237
12010.167.203.238/3110.167.203.238 – 10.167.203.23910.167.203.239
12110.167.203.240/3110.167.203.240 – 10.167.203.24110.167.203.241
12210.167.203.242/3110.167.203.242 – 10.167.203.24310.167.203.243
12310.167.203.244/3110.167.203.244 – 10.167.203.24510.167.203.245
12410.167.203.246/3110.167.203.246 – 10.167.203.24710.167.203.247
12510.167.203.248/3110.167.203.248 – 10.167.203.24910.167.203.249
12610.167.203.250/3110.167.203.250 – 10.167.203.25110.167.203.251
12710.167.203.252/3110.167.203.252 – 10.167.203.25310.167.203.253
12810.167.203.254/3110.167.203.254 – 10.167.203.25510.167.203.255
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 →