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)10.4.239.0/24
network10.4.239.0/24
broadcast10.4.239.255
first host10.4.239.1
last host10.4.239.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.4.239.0/24
address00001010.00000100.11101111.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000100.11101111.00000000
broadcast00001010.00000100.11101111.11111111
green = network part, grey = host part
hex0x0a04ef00
decimal168095488
reverse dns0.239.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:ef00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.4.239.0/3110.4.239.0 – 10.4.239.110.4.239.1
210.4.239.2/3110.4.239.2 – 10.4.239.310.4.239.3
310.4.239.4/3110.4.239.4 – 10.4.239.510.4.239.5
410.4.239.6/3110.4.239.6 – 10.4.239.710.4.239.7
510.4.239.8/3110.4.239.8 – 10.4.239.910.4.239.9
610.4.239.10/3110.4.239.10 – 10.4.239.1110.4.239.11
710.4.239.12/3110.4.239.12 – 10.4.239.1310.4.239.13
810.4.239.14/3110.4.239.14 – 10.4.239.1510.4.239.15
910.4.239.16/3110.4.239.16 – 10.4.239.1710.4.239.17
1010.4.239.18/3110.4.239.18 – 10.4.239.1910.4.239.19
1110.4.239.20/3110.4.239.20 – 10.4.239.2110.4.239.21
1210.4.239.22/3110.4.239.22 – 10.4.239.2310.4.239.23
1310.4.239.24/3110.4.239.24 – 10.4.239.2510.4.239.25
1410.4.239.26/3110.4.239.26 – 10.4.239.2710.4.239.27
1510.4.239.28/3110.4.239.28 – 10.4.239.2910.4.239.29
1610.4.239.30/3110.4.239.30 – 10.4.239.3110.4.239.31
1710.4.239.32/3110.4.239.32 – 10.4.239.3310.4.239.33
1810.4.239.34/3110.4.239.34 – 10.4.239.3510.4.239.35
1910.4.239.36/3110.4.239.36 – 10.4.239.3710.4.239.37
2010.4.239.38/3110.4.239.38 – 10.4.239.3910.4.239.39
2110.4.239.40/3110.4.239.40 – 10.4.239.4110.4.239.41
2210.4.239.42/3110.4.239.42 – 10.4.239.4310.4.239.43
2310.4.239.44/3110.4.239.44 – 10.4.239.4510.4.239.45
2410.4.239.46/3110.4.239.46 – 10.4.239.4710.4.239.47
2510.4.239.48/3110.4.239.48 – 10.4.239.4910.4.239.49
2610.4.239.50/3110.4.239.50 – 10.4.239.5110.4.239.51
2710.4.239.52/3110.4.239.52 – 10.4.239.5310.4.239.53
2810.4.239.54/3110.4.239.54 – 10.4.239.5510.4.239.55
2910.4.239.56/3110.4.239.56 – 10.4.239.5710.4.239.57
3010.4.239.58/3110.4.239.58 – 10.4.239.5910.4.239.59
3110.4.239.60/3110.4.239.60 – 10.4.239.6110.4.239.61
3210.4.239.62/3110.4.239.62 – 10.4.239.6310.4.239.63
3310.4.239.64/3110.4.239.64 – 10.4.239.6510.4.239.65
3410.4.239.66/3110.4.239.66 – 10.4.239.6710.4.239.67
3510.4.239.68/3110.4.239.68 – 10.4.239.6910.4.239.69
3610.4.239.70/3110.4.239.70 – 10.4.239.7110.4.239.71
3710.4.239.72/3110.4.239.72 – 10.4.239.7310.4.239.73
3810.4.239.74/3110.4.239.74 – 10.4.239.7510.4.239.75
3910.4.239.76/3110.4.239.76 – 10.4.239.7710.4.239.77
4010.4.239.78/3110.4.239.78 – 10.4.239.7910.4.239.79
4110.4.239.80/3110.4.239.80 – 10.4.239.8110.4.239.81
4210.4.239.82/3110.4.239.82 – 10.4.239.8310.4.239.83
4310.4.239.84/3110.4.239.84 – 10.4.239.8510.4.239.85
4410.4.239.86/3110.4.239.86 – 10.4.239.8710.4.239.87
4510.4.239.88/3110.4.239.88 – 10.4.239.8910.4.239.89
4610.4.239.90/3110.4.239.90 – 10.4.239.9110.4.239.91
4710.4.239.92/3110.4.239.92 – 10.4.239.9310.4.239.93
4810.4.239.94/3110.4.239.94 – 10.4.239.9510.4.239.95
4910.4.239.96/3110.4.239.96 – 10.4.239.9710.4.239.97
5010.4.239.98/3110.4.239.98 – 10.4.239.9910.4.239.99
5110.4.239.100/3110.4.239.100 – 10.4.239.10110.4.239.101
5210.4.239.102/3110.4.239.102 – 10.4.239.10310.4.239.103
5310.4.239.104/3110.4.239.104 – 10.4.239.10510.4.239.105
5410.4.239.106/3110.4.239.106 – 10.4.239.10710.4.239.107
5510.4.239.108/3110.4.239.108 – 10.4.239.10910.4.239.109
5610.4.239.110/3110.4.239.110 – 10.4.239.11110.4.239.111
5710.4.239.112/3110.4.239.112 – 10.4.239.11310.4.239.113
5810.4.239.114/3110.4.239.114 – 10.4.239.11510.4.239.115
5910.4.239.116/3110.4.239.116 – 10.4.239.11710.4.239.117
6010.4.239.118/3110.4.239.118 – 10.4.239.11910.4.239.119
6110.4.239.120/3110.4.239.120 – 10.4.239.12110.4.239.121
6210.4.239.122/3110.4.239.122 – 10.4.239.12310.4.239.123
6310.4.239.124/3110.4.239.124 – 10.4.239.12510.4.239.125
6410.4.239.126/3110.4.239.126 – 10.4.239.12710.4.239.127
6510.4.239.128/3110.4.239.128 – 10.4.239.12910.4.239.129
6610.4.239.130/3110.4.239.130 – 10.4.239.13110.4.239.131
6710.4.239.132/3110.4.239.132 – 10.4.239.13310.4.239.133
6810.4.239.134/3110.4.239.134 – 10.4.239.13510.4.239.135
6910.4.239.136/3110.4.239.136 – 10.4.239.13710.4.239.137
7010.4.239.138/3110.4.239.138 – 10.4.239.13910.4.239.139
7110.4.239.140/3110.4.239.140 – 10.4.239.14110.4.239.141
7210.4.239.142/3110.4.239.142 – 10.4.239.14310.4.239.143
7310.4.239.144/3110.4.239.144 – 10.4.239.14510.4.239.145
7410.4.239.146/3110.4.239.146 – 10.4.239.14710.4.239.147
7510.4.239.148/3110.4.239.148 – 10.4.239.14910.4.239.149
7610.4.239.150/3110.4.239.150 – 10.4.239.15110.4.239.151
7710.4.239.152/3110.4.239.152 – 10.4.239.15310.4.239.153
7810.4.239.154/3110.4.239.154 – 10.4.239.15510.4.239.155
7910.4.239.156/3110.4.239.156 – 10.4.239.15710.4.239.157
8010.4.239.158/3110.4.239.158 – 10.4.239.15910.4.239.159
8110.4.239.160/3110.4.239.160 – 10.4.239.16110.4.239.161
8210.4.239.162/3110.4.239.162 – 10.4.239.16310.4.239.163
8310.4.239.164/3110.4.239.164 – 10.4.239.16510.4.239.165
8410.4.239.166/3110.4.239.166 – 10.4.239.16710.4.239.167
8510.4.239.168/3110.4.239.168 – 10.4.239.16910.4.239.169
8610.4.239.170/3110.4.239.170 – 10.4.239.17110.4.239.171
8710.4.239.172/3110.4.239.172 – 10.4.239.17310.4.239.173
8810.4.239.174/3110.4.239.174 – 10.4.239.17510.4.239.175
8910.4.239.176/3110.4.239.176 – 10.4.239.17710.4.239.177
9010.4.239.178/3110.4.239.178 – 10.4.239.17910.4.239.179
9110.4.239.180/3110.4.239.180 – 10.4.239.18110.4.239.181
9210.4.239.182/3110.4.239.182 – 10.4.239.18310.4.239.183
9310.4.239.184/3110.4.239.184 – 10.4.239.18510.4.239.185
9410.4.239.186/3110.4.239.186 – 10.4.239.18710.4.239.187
9510.4.239.188/3110.4.239.188 – 10.4.239.18910.4.239.189
9610.4.239.190/3110.4.239.190 – 10.4.239.19110.4.239.191
9710.4.239.192/3110.4.239.192 – 10.4.239.19310.4.239.193
9810.4.239.194/3110.4.239.194 – 10.4.239.19510.4.239.195
9910.4.239.196/3110.4.239.196 – 10.4.239.19710.4.239.197
10010.4.239.198/3110.4.239.198 – 10.4.239.19910.4.239.199
10110.4.239.200/3110.4.239.200 – 10.4.239.20110.4.239.201
10210.4.239.202/3110.4.239.202 – 10.4.239.20310.4.239.203
10310.4.239.204/3110.4.239.204 – 10.4.239.20510.4.239.205
10410.4.239.206/3110.4.239.206 – 10.4.239.20710.4.239.207
10510.4.239.208/3110.4.239.208 – 10.4.239.20910.4.239.209
10610.4.239.210/3110.4.239.210 – 10.4.239.21110.4.239.211
10710.4.239.212/3110.4.239.212 – 10.4.239.21310.4.239.213
10810.4.239.214/3110.4.239.214 – 10.4.239.21510.4.239.215
10910.4.239.216/3110.4.239.216 – 10.4.239.21710.4.239.217
11010.4.239.218/3110.4.239.218 – 10.4.239.21910.4.239.219
11110.4.239.220/3110.4.239.220 – 10.4.239.22110.4.239.221
11210.4.239.222/3110.4.239.222 – 10.4.239.22310.4.239.223
11310.4.239.224/3110.4.239.224 – 10.4.239.22510.4.239.225
11410.4.239.226/3110.4.239.226 – 10.4.239.22710.4.239.227
11510.4.239.228/3110.4.239.228 – 10.4.239.22910.4.239.229
11610.4.239.230/3110.4.239.230 – 10.4.239.23110.4.239.231
11710.4.239.232/3110.4.239.232 – 10.4.239.23310.4.239.233
11810.4.239.234/3110.4.239.234 – 10.4.239.23510.4.239.235
11910.4.239.236/3110.4.239.236 – 10.4.239.23710.4.239.237
12010.4.239.238/3110.4.239.238 – 10.4.239.23910.4.239.239
12110.4.239.240/3110.4.239.240 – 10.4.239.24110.4.239.241
12210.4.239.242/3110.4.239.242 – 10.4.239.24310.4.239.243
12310.4.239.244/3110.4.239.244 – 10.4.239.24510.4.239.245
12410.4.239.246/3110.4.239.246 – 10.4.239.24710.4.239.247
12510.4.239.248/3110.4.239.248 – 10.4.239.24910.4.239.249
12610.4.239.250/3110.4.239.250 – 10.4.239.25110.4.239.251
12710.4.239.252/3110.4.239.252 – 10.4.239.25310.4.239.253
12810.4.239.254/3110.4.239.254 – 10.4.239.25510.4.239.255
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 →