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)10.0.255.0/24
network10.0.255.0/24
broadcast10.0.255.255
first host10.0.255.1
last host10.0.255.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.0.255.0/24
address00001010.00000000.11111111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000000.11111111.00000000
broadcast00001010.00000000.11111111.11111111
green = network part, grey = host part
hex0x0a00ff00
decimal167837440
reverse dns0.255.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:ff00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.255.0/3110.0.255.0 – 10.0.255.110.0.255.1
210.0.255.2/3110.0.255.2 – 10.0.255.310.0.255.3
310.0.255.4/3110.0.255.4 – 10.0.255.510.0.255.5
410.0.255.6/3110.0.255.6 – 10.0.255.710.0.255.7
510.0.255.8/3110.0.255.8 – 10.0.255.910.0.255.9
610.0.255.10/3110.0.255.10 – 10.0.255.1110.0.255.11
710.0.255.12/3110.0.255.12 – 10.0.255.1310.0.255.13
810.0.255.14/3110.0.255.14 – 10.0.255.1510.0.255.15
910.0.255.16/3110.0.255.16 – 10.0.255.1710.0.255.17
1010.0.255.18/3110.0.255.18 – 10.0.255.1910.0.255.19
1110.0.255.20/3110.0.255.20 – 10.0.255.2110.0.255.21
1210.0.255.22/3110.0.255.22 – 10.0.255.2310.0.255.23
1310.0.255.24/3110.0.255.24 – 10.0.255.2510.0.255.25
1410.0.255.26/3110.0.255.26 – 10.0.255.2710.0.255.27
1510.0.255.28/3110.0.255.28 – 10.0.255.2910.0.255.29
1610.0.255.30/3110.0.255.30 – 10.0.255.3110.0.255.31
1710.0.255.32/3110.0.255.32 – 10.0.255.3310.0.255.33
1810.0.255.34/3110.0.255.34 – 10.0.255.3510.0.255.35
1910.0.255.36/3110.0.255.36 – 10.0.255.3710.0.255.37
2010.0.255.38/3110.0.255.38 – 10.0.255.3910.0.255.39
2110.0.255.40/3110.0.255.40 – 10.0.255.4110.0.255.41
2210.0.255.42/3110.0.255.42 – 10.0.255.4310.0.255.43
2310.0.255.44/3110.0.255.44 – 10.0.255.4510.0.255.45
2410.0.255.46/3110.0.255.46 – 10.0.255.4710.0.255.47
2510.0.255.48/3110.0.255.48 – 10.0.255.4910.0.255.49
2610.0.255.50/3110.0.255.50 – 10.0.255.5110.0.255.51
2710.0.255.52/3110.0.255.52 – 10.0.255.5310.0.255.53
2810.0.255.54/3110.0.255.54 – 10.0.255.5510.0.255.55
2910.0.255.56/3110.0.255.56 – 10.0.255.5710.0.255.57
3010.0.255.58/3110.0.255.58 – 10.0.255.5910.0.255.59
3110.0.255.60/3110.0.255.60 – 10.0.255.6110.0.255.61
3210.0.255.62/3110.0.255.62 – 10.0.255.6310.0.255.63
3310.0.255.64/3110.0.255.64 – 10.0.255.6510.0.255.65
3410.0.255.66/3110.0.255.66 – 10.0.255.6710.0.255.67
3510.0.255.68/3110.0.255.68 – 10.0.255.6910.0.255.69
3610.0.255.70/3110.0.255.70 – 10.0.255.7110.0.255.71
3710.0.255.72/3110.0.255.72 – 10.0.255.7310.0.255.73
3810.0.255.74/3110.0.255.74 – 10.0.255.7510.0.255.75
3910.0.255.76/3110.0.255.76 – 10.0.255.7710.0.255.77
4010.0.255.78/3110.0.255.78 – 10.0.255.7910.0.255.79
4110.0.255.80/3110.0.255.80 – 10.0.255.8110.0.255.81
4210.0.255.82/3110.0.255.82 – 10.0.255.8310.0.255.83
4310.0.255.84/3110.0.255.84 – 10.0.255.8510.0.255.85
4410.0.255.86/3110.0.255.86 – 10.0.255.8710.0.255.87
4510.0.255.88/3110.0.255.88 – 10.0.255.8910.0.255.89
4610.0.255.90/3110.0.255.90 – 10.0.255.9110.0.255.91
4710.0.255.92/3110.0.255.92 – 10.0.255.9310.0.255.93
4810.0.255.94/3110.0.255.94 – 10.0.255.9510.0.255.95
4910.0.255.96/3110.0.255.96 – 10.0.255.9710.0.255.97
5010.0.255.98/3110.0.255.98 – 10.0.255.9910.0.255.99
5110.0.255.100/3110.0.255.100 – 10.0.255.10110.0.255.101
5210.0.255.102/3110.0.255.102 – 10.0.255.10310.0.255.103
5310.0.255.104/3110.0.255.104 – 10.0.255.10510.0.255.105
5410.0.255.106/3110.0.255.106 – 10.0.255.10710.0.255.107
5510.0.255.108/3110.0.255.108 – 10.0.255.10910.0.255.109
5610.0.255.110/3110.0.255.110 – 10.0.255.11110.0.255.111
5710.0.255.112/3110.0.255.112 – 10.0.255.11310.0.255.113
5810.0.255.114/3110.0.255.114 – 10.0.255.11510.0.255.115
5910.0.255.116/3110.0.255.116 – 10.0.255.11710.0.255.117
6010.0.255.118/3110.0.255.118 – 10.0.255.11910.0.255.119
6110.0.255.120/3110.0.255.120 – 10.0.255.12110.0.255.121
6210.0.255.122/3110.0.255.122 – 10.0.255.12310.0.255.123
6310.0.255.124/3110.0.255.124 – 10.0.255.12510.0.255.125
6410.0.255.126/3110.0.255.126 – 10.0.255.12710.0.255.127
6510.0.255.128/3110.0.255.128 – 10.0.255.12910.0.255.129
6610.0.255.130/3110.0.255.130 – 10.0.255.13110.0.255.131
6710.0.255.132/3110.0.255.132 – 10.0.255.13310.0.255.133
6810.0.255.134/3110.0.255.134 – 10.0.255.13510.0.255.135
6910.0.255.136/3110.0.255.136 – 10.0.255.13710.0.255.137
7010.0.255.138/3110.0.255.138 – 10.0.255.13910.0.255.139
7110.0.255.140/3110.0.255.140 – 10.0.255.14110.0.255.141
7210.0.255.142/3110.0.255.142 – 10.0.255.14310.0.255.143
7310.0.255.144/3110.0.255.144 – 10.0.255.14510.0.255.145
7410.0.255.146/3110.0.255.146 – 10.0.255.14710.0.255.147
7510.0.255.148/3110.0.255.148 – 10.0.255.14910.0.255.149
7610.0.255.150/3110.0.255.150 – 10.0.255.15110.0.255.151
7710.0.255.152/3110.0.255.152 – 10.0.255.15310.0.255.153
7810.0.255.154/3110.0.255.154 – 10.0.255.15510.0.255.155
7910.0.255.156/3110.0.255.156 – 10.0.255.15710.0.255.157
8010.0.255.158/3110.0.255.158 – 10.0.255.15910.0.255.159
8110.0.255.160/3110.0.255.160 – 10.0.255.16110.0.255.161
8210.0.255.162/3110.0.255.162 – 10.0.255.16310.0.255.163
8310.0.255.164/3110.0.255.164 – 10.0.255.16510.0.255.165
8410.0.255.166/3110.0.255.166 – 10.0.255.16710.0.255.167
8510.0.255.168/3110.0.255.168 – 10.0.255.16910.0.255.169
8610.0.255.170/3110.0.255.170 – 10.0.255.17110.0.255.171
8710.0.255.172/3110.0.255.172 – 10.0.255.17310.0.255.173
8810.0.255.174/3110.0.255.174 – 10.0.255.17510.0.255.175
8910.0.255.176/3110.0.255.176 – 10.0.255.17710.0.255.177
9010.0.255.178/3110.0.255.178 – 10.0.255.17910.0.255.179
9110.0.255.180/3110.0.255.180 – 10.0.255.18110.0.255.181
9210.0.255.182/3110.0.255.182 – 10.0.255.18310.0.255.183
9310.0.255.184/3110.0.255.184 – 10.0.255.18510.0.255.185
9410.0.255.186/3110.0.255.186 – 10.0.255.18710.0.255.187
9510.0.255.188/3110.0.255.188 – 10.0.255.18910.0.255.189
9610.0.255.190/3110.0.255.190 – 10.0.255.19110.0.255.191
9710.0.255.192/3110.0.255.192 – 10.0.255.19310.0.255.193
9810.0.255.194/3110.0.255.194 – 10.0.255.19510.0.255.195
9910.0.255.196/3110.0.255.196 – 10.0.255.19710.0.255.197
10010.0.255.198/3110.0.255.198 – 10.0.255.19910.0.255.199
10110.0.255.200/3110.0.255.200 – 10.0.255.20110.0.255.201
10210.0.255.202/3110.0.255.202 – 10.0.255.20310.0.255.203
10310.0.255.204/3110.0.255.204 – 10.0.255.20510.0.255.205
10410.0.255.206/3110.0.255.206 – 10.0.255.20710.0.255.207
10510.0.255.208/3110.0.255.208 – 10.0.255.20910.0.255.209
10610.0.255.210/3110.0.255.210 – 10.0.255.21110.0.255.211
10710.0.255.212/3110.0.255.212 – 10.0.255.21310.0.255.213
10810.0.255.214/3110.0.255.214 – 10.0.255.21510.0.255.215
10910.0.255.216/3110.0.255.216 – 10.0.255.21710.0.255.217
11010.0.255.218/3110.0.255.218 – 10.0.255.21910.0.255.219
11110.0.255.220/3110.0.255.220 – 10.0.255.22110.0.255.221
11210.0.255.222/3110.0.255.222 – 10.0.255.22310.0.255.223
11310.0.255.224/3110.0.255.224 – 10.0.255.22510.0.255.225
11410.0.255.226/3110.0.255.226 – 10.0.255.22710.0.255.227
11510.0.255.228/3110.0.255.228 – 10.0.255.22910.0.255.229
11610.0.255.230/3110.0.255.230 – 10.0.255.23110.0.255.231
11710.0.255.232/3110.0.255.232 – 10.0.255.23310.0.255.233
11810.0.255.234/3110.0.255.234 – 10.0.255.23510.0.255.235
11910.0.255.236/3110.0.255.236 – 10.0.255.23710.0.255.237
12010.0.255.238/3110.0.255.238 – 10.0.255.23910.0.255.239
12110.0.255.240/3110.0.255.240 – 10.0.255.24110.0.255.241
12210.0.255.242/3110.0.255.242 – 10.0.255.24310.0.255.243
12310.0.255.244/3110.0.255.244 – 10.0.255.24510.0.255.245
12410.0.255.246/3110.0.255.246 – 10.0.255.24710.0.255.247
12510.0.255.248/3110.0.255.248 – 10.0.255.24910.0.255.249
12610.0.255.250/3110.0.255.250 – 10.0.255.25110.0.255.251
12710.0.255.252/3110.0.255.252 – 10.0.255.25310.0.255.253
12810.0.255.254/3110.0.255.254 – 10.0.255.25510.0.255.255
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 →