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)10.91.7.0/24
network10.91.7.0/24
broadcast10.91.7.255
first host10.91.7.1
last host10.91.7.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.91.7.0/24
address00001010.01011011.00000111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01011011.00000111.00000000
broadcast00001010.01011011.00000111.11111111
green = network part, grey = host part
hex0x0a5b0700
decimal173737728
reverse dns0.7.91.10.in-addr.arpa
ipv4-mapped::ffff:a5b:700

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.91.7.0/3110.91.7.0 – 10.91.7.110.91.7.1
210.91.7.2/3110.91.7.2 – 10.91.7.310.91.7.3
310.91.7.4/3110.91.7.4 – 10.91.7.510.91.7.5
410.91.7.6/3110.91.7.6 – 10.91.7.710.91.7.7
510.91.7.8/3110.91.7.8 – 10.91.7.910.91.7.9
610.91.7.10/3110.91.7.10 – 10.91.7.1110.91.7.11
710.91.7.12/3110.91.7.12 – 10.91.7.1310.91.7.13
810.91.7.14/3110.91.7.14 – 10.91.7.1510.91.7.15
910.91.7.16/3110.91.7.16 – 10.91.7.1710.91.7.17
1010.91.7.18/3110.91.7.18 – 10.91.7.1910.91.7.19
1110.91.7.20/3110.91.7.20 – 10.91.7.2110.91.7.21
1210.91.7.22/3110.91.7.22 – 10.91.7.2310.91.7.23
1310.91.7.24/3110.91.7.24 – 10.91.7.2510.91.7.25
1410.91.7.26/3110.91.7.26 – 10.91.7.2710.91.7.27
1510.91.7.28/3110.91.7.28 – 10.91.7.2910.91.7.29
1610.91.7.30/3110.91.7.30 – 10.91.7.3110.91.7.31
1710.91.7.32/3110.91.7.32 – 10.91.7.3310.91.7.33
1810.91.7.34/3110.91.7.34 – 10.91.7.3510.91.7.35
1910.91.7.36/3110.91.7.36 – 10.91.7.3710.91.7.37
2010.91.7.38/3110.91.7.38 – 10.91.7.3910.91.7.39
2110.91.7.40/3110.91.7.40 – 10.91.7.4110.91.7.41
2210.91.7.42/3110.91.7.42 – 10.91.7.4310.91.7.43
2310.91.7.44/3110.91.7.44 – 10.91.7.4510.91.7.45
2410.91.7.46/3110.91.7.46 – 10.91.7.4710.91.7.47
2510.91.7.48/3110.91.7.48 – 10.91.7.4910.91.7.49
2610.91.7.50/3110.91.7.50 – 10.91.7.5110.91.7.51
2710.91.7.52/3110.91.7.52 – 10.91.7.5310.91.7.53
2810.91.7.54/3110.91.7.54 – 10.91.7.5510.91.7.55
2910.91.7.56/3110.91.7.56 – 10.91.7.5710.91.7.57
3010.91.7.58/3110.91.7.58 – 10.91.7.5910.91.7.59
3110.91.7.60/3110.91.7.60 – 10.91.7.6110.91.7.61
3210.91.7.62/3110.91.7.62 – 10.91.7.6310.91.7.63
3310.91.7.64/3110.91.7.64 – 10.91.7.6510.91.7.65
3410.91.7.66/3110.91.7.66 – 10.91.7.6710.91.7.67
3510.91.7.68/3110.91.7.68 – 10.91.7.6910.91.7.69
3610.91.7.70/3110.91.7.70 – 10.91.7.7110.91.7.71
3710.91.7.72/3110.91.7.72 – 10.91.7.7310.91.7.73
3810.91.7.74/3110.91.7.74 – 10.91.7.7510.91.7.75
3910.91.7.76/3110.91.7.76 – 10.91.7.7710.91.7.77
4010.91.7.78/3110.91.7.78 – 10.91.7.7910.91.7.79
4110.91.7.80/3110.91.7.80 – 10.91.7.8110.91.7.81
4210.91.7.82/3110.91.7.82 – 10.91.7.8310.91.7.83
4310.91.7.84/3110.91.7.84 – 10.91.7.8510.91.7.85
4410.91.7.86/3110.91.7.86 – 10.91.7.8710.91.7.87
4510.91.7.88/3110.91.7.88 – 10.91.7.8910.91.7.89
4610.91.7.90/3110.91.7.90 – 10.91.7.9110.91.7.91
4710.91.7.92/3110.91.7.92 – 10.91.7.9310.91.7.93
4810.91.7.94/3110.91.7.94 – 10.91.7.9510.91.7.95
4910.91.7.96/3110.91.7.96 – 10.91.7.9710.91.7.97
5010.91.7.98/3110.91.7.98 – 10.91.7.9910.91.7.99
5110.91.7.100/3110.91.7.100 – 10.91.7.10110.91.7.101
5210.91.7.102/3110.91.7.102 – 10.91.7.10310.91.7.103
5310.91.7.104/3110.91.7.104 – 10.91.7.10510.91.7.105
5410.91.7.106/3110.91.7.106 – 10.91.7.10710.91.7.107
5510.91.7.108/3110.91.7.108 – 10.91.7.10910.91.7.109
5610.91.7.110/3110.91.7.110 – 10.91.7.11110.91.7.111
5710.91.7.112/3110.91.7.112 – 10.91.7.11310.91.7.113
5810.91.7.114/3110.91.7.114 – 10.91.7.11510.91.7.115
5910.91.7.116/3110.91.7.116 – 10.91.7.11710.91.7.117
6010.91.7.118/3110.91.7.118 – 10.91.7.11910.91.7.119
6110.91.7.120/3110.91.7.120 – 10.91.7.12110.91.7.121
6210.91.7.122/3110.91.7.122 – 10.91.7.12310.91.7.123
6310.91.7.124/3110.91.7.124 – 10.91.7.12510.91.7.125
6410.91.7.126/3110.91.7.126 – 10.91.7.12710.91.7.127
6510.91.7.128/3110.91.7.128 – 10.91.7.12910.91.7.129
6610.91.7.130/3110.91.7.130 – 10.91.7.13110.91.7.131
6710.91.7.132/3110.91.7.132 – 10.91.7.13310.91.7.133
6810.91.7.134/3110.91.7.134 – 10.91.7.13510.91.7.135
6910.91.7.136/3110.91.7.136 – 10.91.7.13710.91.7.137
7010.91.7.138/3110.91.7.138 – 10.91.7.13910.91.7.139
7110.91.7.140/3110.91.7.140 – 10.91.7.14110.91.7.141
7210.91.7.142/3110.91.7.142 – 10.91.7.14310.91.7.143
7310.91.7.144/3110.91.7.144 – 10.91.7.14510.91.7.145
7410.91.7.146/3110.91.7.146 – 10.91.7.14710.91.7.147
7510.91.7.148/3110.91.7.148 – 10.91.7.14910.91.7.149
7610.91.7.150/3110.91.7.150 – 10.91.7.15110.91.7.151
7710.91.7.152/3110.91.7.152 – 10.91.7.15310.91.7.153
7810.91.7.154/3110.91.7.154 – 10.91.7.15510.91.7.155
7910.91.7.156/3110.91.7.156 – 10.91.7.15710.91.7.157
8010.91.7.158/3110.91.7.158 – 10.91.7.15910.91.7.159
8110.91.7.160/3110.91.7.160 – 10.91.7.16110.91.7.161
8210.91.7.162/3110.91.7.162 – 10.91.7.16310.91.7.163
8310.91.7.164/3110.91.7.164 – 10.91.7.16510.91.7.165
8410.91.7.166/3110.91.7.166 – 10.91.7.16710.91.7.167
8510.91.7.168/3110.91.7.168 – 10.91.7.16910.91.7.169
8610.91.7.170/3110.91.7.170 – 10.91.7.17110.91.7.171
8710.91.7.172/3110.91.7.172 – 10.91.7.17310.91.7.173
8810.91.7.174/3110.91.7.174 – 10.91.7.17510.91.7.175
8910.91.7.176/3110.91.7.176 – 10.91.7.17710.91.7.177
9010.91.7.178/3110.91.7.178 – 10.91.7.17910.91.7.179
9110.91.7.180/3110.91.7.180 – 10.91.7.18110.91.7.181
9210.91.7.182/3110.91.7.182 – 10.91.7.18310.91.7.183
9310.91.7.184/3110.91.7.184 – 10.91.7.18510.91.7.185
9410.91.7.186/3110.91.7.186 – 10.91.7.18710.91.7.187
9510.91.7.188/3110.91.7.188 – 10.91.7.18910.91.7.189
9610.91.7.190/3110.91.7.190 – 10.91.7.19110.91.7.191
9710.91.7.192/3110.91.7.192 – 10.91.7.19310.91.7.193
9810.91.7.194/3110.91.7.194 – 10.91.7.19510.91.7.195
9910.91.7.196/3110.91.7.196 – 10.91.7.19710.91.7.197
10010.91.7.198/3110.91.7.198 – 10.91.7.19910.91.7.199
10110.91.7.200/3110.91.7.200 – 10.91.7.20110.91.7.201
10210.91.7.202/3110.91.7.202 – 10.91.7.20310.91.7.203
10310.91.7.204/3110.91.7.204 – 10.91.7.20510.91.7.205
10410.91.7.206/3110.91.7.206 – 10.91.7.20710.91.7.207
10510.91.7.208/3110.91.7.208 – 10.91.7.20910.91.7.209
10610.91.7.210/3110.91.7.210 – 10.91.7.21110.91.7.211
10710.91.7.212/3110.91.7.212 – 10.91.7.21310.91.7.213
10810.91.7.214/3110.91.7.214 – 10.91.7.21510.91.7.215
10910.91.7.216/3110.91.7.216 – 10.91.7.21710.91.7.217
11010.91.7.218/3110.91.7.218 – 10.91.7.21910.91.7.219
11110.91.7.220/3110.91.7.220 – 10.91.7.22110.91.7.221
11210.91.7.222/3110.91.7.222 – 10.91.7.22310.91.7.223
11310.91.7.224/3110.91.7.224 – 10.91.7.22510.91.7.225
11410.91.7.226/3110.91.7.226 – 10.91.7.22710.91.7.227
11510.91.7.228/3110.91.7.228 – 10.91.7.22910.91.7.229
11610.91.7.230/3110.91.7.230 – 10.91.7.23110.91.7.231
11710.91.7.232/3110.91.7.232 – 10.91.7.23310.91.7.233
11810.91.7.234/3110.91.7.234 – 10.91.7.23510.91.7.235
11910.91.7.236/3110.91.7.236 – 10.91.7.23710.91.7.237
12010.91.7.238/3110.91.7.238 – 10.91.7.23910.91.7.239
12110.91.7.240/3110.91.7.240 – 10.91.7.24110.91.7.241
12210.91.7.242/3110.91.7.242 – 10.91.7.24310.91.7.243
12310.91.7.244/3110.91.7.244 – 10.91.7.24510.91.7.245
12410.91.7.246/3110.91.7.246 – 10.91.7.24710.91.7.247
12510.91.7.248/3110.91.7.248 – 10.91.7.24910.91.7.249
12610.91.7.250/3110.91.7.250 – 10.91.7.25110.91.7.251
12710.91.7.252/3110.91.7.252 – 10.91.7.25310.91.7.253
12810.91.7.254/3110.91.7.254 – 10.91.7.25510.91.7.255
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 →