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)10.2.27.0/24
network10.2.27.0/24
broadcast10.2.27.255
first host10.2.27.1
last host10.2.27.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.2.27.0/24
address00001010.00000010.00011011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000010.00011011.00000000
broadcast00001010.00000010.00011011.11111111
green = network part, grey = host part
hex0x0a021b00
decimal167910144
reverse dns0.27.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:1b00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.27.0/3110.2.27.0 – 10.2.27.110.2.27.1
210.2.27.2/3110.2.27.2 – 10.2.27.310.2.27.3
310.2.27.4/3110.2.27.4 – 10.2.27.510.2.27.5
410.2.27.6/3110.2.27.6 – 10.2.27.710.2.27.7
510.2.27.8/3110.2.27.8 – 10.2.27.910.2.27.9
610.2.27.10/3110.2.27.10 – 10.2.27.1110.2.27.11
710.2.27.12/3110.2.27.12 – 10.2.27.1310.2.27.13
810.2.27.14/3110.2.27.14 – 10.2.27.1510.2.27.15
910.2.27.16/3110.2.27.16 – 10.2.27.1710.2.27.17
1010.2.27.18/3110.2.27.18 – 10.2.27.1910.2.27.19
1110.2.27.20/3110.2.27.20 – 10.2.27.2110.2.27.21
1210.2.27.22/3110.2.27.22 – 10.2.27.2310.2.27.23
1310.2.27.24/3110.2.27.24 – 10.2.27.2510.2.27.25
1410.2.27.26/3110.2.27.26 – 10.2.27.2710.2.27.27
1510.2.27.28/3110.2.27.28 – 10.2.27.2910.2.27.29
1610.2.27.30/3110.2.27.30 – 10.2.27.3110.2.27.31
1710.2.27.32/3110.2.27.32 – 10.2.27.3310.2.27.33
1810.2.27.34/3110.2.27.34 – 10.2.27.3510.2.27.35
1910.2.27.36/3110.2.27.36 – 10.2.27.3710.2.27.37
2010.2.27.38/3110.2.27.38 – 10.2.27.3910.2.27.39
2110.2.27.40/3110.2.27.40 – 10.2.27.4110.2.27.41
2210.2.27.42/3110.2.27.42 – 10.2.27.4310.2.27.43
2310.2.27.44/3110.2.27.44 – 10.2.27.4510.2.27.45
2410.2.27.46/3110.2.27.46 – 10.2.27.4710.2.27.47
2510.2.27.48/3110.2.27.48 – 10.2.27.4910.2.27.49
2610.2.27.50/3110.2.27.50 – 10.2.27.5110.2.27.51
2710.2.27.52/3110.2.27.52 – 10.2.27.5310.2.27.53
2810.2.27.54/3110.2.27.54 – 10.2.27.5510.2.27.55
2910.2.27.56/3110.2.27.56 – 10.2.27.5710.2.27.57
3010.2.27.58/3110.2.27.58 – 10.2.27.5910.2.27.59
3110.2.27.60/3110.2.27.60 – 10.2.27.6110.2.27.61
3210.2.27.62/3110.2.27.62 – 10.2.27.6310.2.27.63
3310.2.27.64/3110.2.27.64 – 10.2.27.6510.2.27.65
3410.2.27.66/3110.2.27.66 – 10.2.27.6710.2.27.67
3510.2.27.68/3110.2.27.68 – 10.2.27.6910.2.27.69
3610.2.27.70/3110.2.27.70 – 10.2.27.7110.2.27.71
3710.2.27.72/3110.2.27.72 – 10.2.27.7310.2.27.73
3810.2.27.74/3110.2.27.74 – 10.2.27.7510.2.27.75
3910.2.27.76/3110.2.27.76 – 10.2.27.7710.2.27.77
4010.2.27.78/3110.2.27.78 – 10.2.27.7910.2.27.79
4110.2.27.80/3110.2.27.80 – 10.2.27.8110.2.27.81
4210.2.27.82/3110.2.27.82 – 10.2.27.8310.2.27.83
4310.2.27.84/3110.2.27.84 – 10.2.27.8510.2.27.85
4410.2.27.86/3110.2.27.86 – 10.2.27.8710.2.27.87
4510.2.27.88/3110.2.27.88 – 10.2.27.8910.2.27.89
4610.2.27.90/3110.2.27.90 – 10.2.27.9110.2.27.91
4710.2.27.92/3110.2.27.92 – 10.2.27.9310.2.27.93
4810.2.27.94/3110.2.27.94 – 10.2.27.9510.2.27.95
4910.2.27.96/3110.2.27.96 – 10.2.27.9710.2.27.97
5010.2.27.98/3110.2.27.98 – 10.2.27.9910.2.27.99
5110.2.27.100/3110.2.27.100 – 10.2.27.10110.2.27.101
5210.2.27.102/3110.2.27.102 – 10.2.27.10310.2.27.103
5310.2.27.104/3110.2.27.104 – 10.2.27.10510.2.27.105
5410.2.27.106/3110.2.27.106 – 10.2.27.10710.2.27.107
5510.2.27.108/3110.2.27.108 – 10.2.27.10910.2.27.109
5610.2.27.110/3110.2.27.110 – 10.2.27.11110.2.27.111
5710.2.27.112/3110.2.27.112 – 10.2.27.11310.2.27.113
5810.2.27.114/3110.2.27.114 – 10.2.27.11510.2.27.115
5910.2.27.116/3110.2.27.116 – 10.2.27.11710.2.27.117
6010.2.27.118/3110.2.27.118 – 10.2.27.11910.2.27.119
6110.2.27.120/3110.2.27.120 – 10.2.27.12110.2.27.121
6210.2.27.122/3110.2.27.122 – 10.2.27.12310.2.27.123
6310.2.27.124/3110.2.27.124 – 10.2.27.12510.2.27.125
6410.2.27.126/3110.2.27.126 – 10.2.27.12710.2.27.127
6510.2.27.128/3110.2.27.128 – 10.2.27.12910.2.27.129
6610.2.27.130/3110.2.27.130 – 10.2.27.13110.2.27.131
6710.2.27.132/3110.2.27.132 – 10.2.27.13310.2.27.133
6810.2.27.134/3110.2.27.134 – 10.2.27.13510.2.27.135
6910.2.27.136/3110.2.27.136 – 10.2.27.13710.2.27.137
7010.2.27.138/3110.2.27.138 – 10.2.27.13910.2.27.139
7110.2.27.140/3110.2.27.140 – 10.2.27.14110.2.27.141
7210.2.27.142/3110.2.27.142 – 10.2.27.14310.2.27.143
7310.2.27.144/3110.2.27.144 – 10.2.27.14510.2.27.145
7410.2.27.146/3110.2.27.146 – 10.2.27.14710.2.27.147
7510.2.27.148/3110.2.27.148 – 10.2.27.14910.2.27.149
7610.2.27.150/3110.2.27.150 – 10.2.27.15110.2.27.151
7710.2.27.152/3110.2.27.152 – 10.2.27.15310.2.27.153
7810.2.27.154/3110.2.27.154 – 10.2.27.15510.2.27.155
7910.2.27.156/3110.2.27.156 – 10.2.27.15710.2.27.157
8010.2.27.158/3110.2.27.158 – 10.2.27.15910.2.27.159
8110.2.27.160/3110.2.27.160 – 10.2.27.16110.2.27.161
8210.2.27.162/3110.2.27.162 – 10.2.27.16310.2.27.163
8310.2.27.164/3110.2.27.164 – 10.2.27.16510.2.27.165
8410.2.27.166/3110.2.27.166 – 10.2.27.16710.2.27.167
8510.2.27.168/3110.2.27.168 – 10.2.27.16910.2.27.169
8610.2.27.170/3110.2.27.170 – 10.2.27.17110.2.27.171
8710.2.27.172/3110.2.27.172 – 10.2.27.17310.2.27.173
8810.2.27.174/3110.2.27.174 – 10.2.27.17510.2.27.175
8910.2.27.176/3110.2.27.176 – 10.2.27.17710.2.27.177
9010.2.27.178/3110.2.27.178 – 10.2.27.17910.2.27.179
9110.2.27.180/3110.2.27.180 – 10.2.27.18110.2.27.181
9210.2.27.182/3110.2.27.182 – 10.2.27.18310.2.27.183
9310.2.27.184/3110.2.27.184 – 10.2.27.18510.2.27.185
9410.2.27.186/3110.2.27.186 – 10.2.27.18710.2.27.187
9510.2.27.188/3110.2.27.188 – 10.2.27.18910.2.27.189
9610.2.27.190/3110.2.27.190 – 10.2.27.19110.2.27.191
9710.2.27.192/3110.2.27.192 – 10.2.27.19310.2.27.193
9810.2.27.194/3110.2.27.194 – 10.2.27.19510.2.27.195
9910.2.27.196/3110.2.27.196 – 10.2.27.19710.2.27.197
10010.2.27.198/3110.2.27.198 – 10.2.27.19910.2.27.199
10110.2.27.200/3110.2.27.200 – 10.2.27.20110.2.27.201
10210.2.27.202/3110.2.27.202 – 10.2.27.20310.2.27.203
10310.2.27.204/3110.2.27.204 – 10.2.27.20510.2.27.205
10410.2.27.206/3110.2.27.206 – 10.2.27.20710.2.27.207
10510.2.27.208/3110.2.27.208 – 10.2.27.20910.2.27.209
10610.2.27.210/3110.2.27.210 – 10.2.27.21110.2.27.211
10710.2.27.212/3110.2.27.212 – 10.2.27.21310.2.27.213
10810.2.27.214/3110.2.27.214 – 10.2.27.21510.2.27.215
10910.2.27.216/3110.2.27.216 – 10.2.27.21710.2.27.217
11010.2.27.218/3110.2.27.218 – 10.2.27.21910.2.27.219
11110.2.27.220/3110.2.27.220 – 10.2.27.22110.2.27.221
11210.2.27.222/3110.2.27.222 – 10.2.27.22310.2.27.223
11310.2.27.224/3110.2.27.224 – 10.2.27.22510.2.27.225
11410.2.27.226/3110.2.27.226 – 10.2.27.22710.2.27.227
11510.2.27.228/3110.2.27.228 – 10.2.27.22910.2.27.229
11610.2.27.230/3110.2.27.230 – 10.2.27.23110.2.27.231
11710.2.27.232/3110.2.27.232 – 10.2.27.23310.2.27.233
11810.2.27.234/3110.2.27.234 – 10.2.27.23510.2.27.235
11910.2.27.236/3110.2.27.236 – 10.2.27.23710.2.27.237
12010.2.27.238/3110.2.27.238 – 10.2.27.23910.2.27.239
12110.2.27.240/3110.2.27.240 – 10.2.27.24110.2.27.241
12210.2.27.242/3110.2.27.242 – 10.2.27.24310.2.27.243
12310.2.27.244/3110.2.27.244 – 10.2.27.24510.2.27.245
12410.2.27.246/3110.2.27.246 – 10.2.27.24710.2.27.247
12510.2.27.248/3110.2.27.248 – 10.2.27.24910.2.27.249
12610.2.27.250/3110.2.27.250 – 10.2.27.25110.2.27.251
12710.2.27.252/3110.2.27.252 – 10.2.27.25310.2.27.253
12810.2.27.254/3110.2.27.254 – 10.2.27.25510.2.27.255
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 →