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)10.239.45.0/24
network10.239.45.0/24
broadcast10.239.45.255
first host10.239.45.1
last host10.239.45.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.239.45.0/24
address00001010.11101111.00101101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.11101111.00101101.00000000
broadcast00001010.11101111.00101101.11111111
green = network part, grey = host part
hex0x0aef2d00
decimal183446784
reverse dns0.45.239.10.in-addr.arpa
ipv4-mapped::ffff:aef:2d00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.239.45.0/3110.239.45.0 – 10.239.45.110.239.45.1
210.239.45.2/3110.239.45.2 – 10.239.45.310.239.45.3
310.239.45.4/3110.239.45.4 – 10.239.45.510.239.45.5
410.239.45.6/3110.239.45.6 – 10.239.45.710.239.45.7
510.239.45.8/3110.239.45.8 – 10.239.45.910.239.45.9
610.239.45.10/3110.239.45.10 – 10.239.45.1110.239.45.11
710.239.45.12/3110.239.45.12 – 10.239.45.1310.239.45.13
810.239.45.14/3110.239.45.14 – 10.239.45.1510.239.45.15
910.239.45.16/3110.239.45.16 – 10.239.45.1710.239.45.17
1010.239.45.18/3110.239.45.18 – 10.239.45.1910.239.45.19
1110.239.45.20/3110.239.45.20 – 10.239.45.2110.239.45.21
1210.239.45.22/3110.239.45.22 – 10.239.45.2310.239.45.23
1310.239.45.24/3110.239.45.24 – 10.239.45.2510.239.45.25
1410.239.45.26/3110.239.45.26 – 10.239.45.2710.239.45.27
1510.239.45.28/3110.239.45.28 – 10.239.45.2910.239.45.29
1610.239.45.30/3110.239.45.30 – 10.239.45.3110.239.45.31
1710.239.45.32/3110.239.45.32 – 10.239.45.3310.239.45.33
1810.239.45.34/3110.239.45.34 – 10.239.45.3510.239.45.35
1910.239.45.36/3110.239.45.36 – 10.239.45.3710.239.45.37
2010.239.45.38/3110.239.45.38 – 10.239.45.3910.239.45.39
2110.239.45.40/3110.239.45.40 – 10.239.45.4110.239.45.41
2210.239.45.42/3110.239.45.42 – 10.239.45.4310.239.45.43
2310.239.45.44/3110.239.45.44 – 10.239.45.4510.239.45.45
2410.239.45.46/3110.239.45.46 – 10.239.45.4710.239.45.47
2510.239.45.48/3110.239.45.48 – 10.239.45.4910.239.45.49
2610.239.45.50/3110.239.45.50 – 10.239.45.5110.239.45.51
2710.239.45.52/3110.239.45.52 – 10.239.45.5310.239.45.53
2810.239.45.54/3110.239.45.54 – 10.239.45.5510.239.45.55
2910.239.45.56/3110.239.45.56 – 10.239.45.5710.239.45.57
3010.239.45.58/3110.239.45.58 – 10.239.45.5910.239.45.59
3110.239.45.60/3110.239.45.60 – 10.239.45.6110.239.45.61
3210.239.45.62/3110.239.45.62 – 10.239.45.6310.239.45.63
3310.239.45.64/3110.239.45.64 – 10.239.45.6510.239.45.65
3410.239.45.66/3110.239.45.66 – 10.239.45.6710.239.45.67
3510.239.45.68/3110.239.45.68 – 10.239.45.6910.239.45.69
3610.239.45.70/3110.239.45.70 – 10.239.45.7110.239.45.71
3710.239.45.72/3110.239.45.72 – 10.239.45.7310.239.45.73
3810.239.45.74/3110.239.45.74 – 10.239.45.7510.239.45.75
3910.239.45.76/3110.239.45.76 – 10.239.45.7710.239.45.77
4010.239.45.78/3110.239.45.78 – 10.239.45.7910.239.45.79
4110.239.45.80/3110.239.45.80 – 10.239.45.8110.239.45.81
4210.239.45.82/3110.239.45.82 – 10.239.45.8310.239.45.83
4310.239.45.84/3110.239.45.84 – 10.239.45.8510.239.45.85
4410.239.45.86/3110.239.45.86 – 10.239.45.8710.239.45.87
4510.239.45.88/3110.239.45.88 – 10.239.45.8910.239.45.89
4610.239.45.90/3110.239.45.90 – 10.239.45.9110.239.45.91
4710.239.45.92/3110.239.45.92 – 10.239.45.9310.239.45.93
4810.239.45.94/3110.239.45.94 – 10.239.45.9510.239.45.95
4910.239.45.96/3110.239.45.96 – 10.239.45.9710.239.45.97
5010.239.45.98/3110.239.45.98 – 10.239.45.9910.239.45.99
5110.239.45.100/3110.239.45.100 – 10.239.45.10110.239.45.101
5210.239.45.102/3110.239.45.102 – 10.239.45.10310.239.45.103
5310.239.45.104/3110.239.45.104 – 10.239.45.10510.239.45.105
5410.239.45.106/3110.239.45.106 – 10.239.45.10710.239.45.107
5510.239.45.108/3110.239.45.108 – 10.239.45.10910.239.45.109
5610.239.45.110/3110.239.45.110 – 10.239.45.11110.239.45.111
5710.239.45.112/3110.239.45.112 – 10.239.45.11310.239.45.113
5810.239.45.114/3110.239.45.114 – 10.239.45.11510.239.45.115
5910.239.45.116/3110.239.45.116 – 10.239.45.11710.239.45.117
6010.239.45.118/3110.239.45.118 – 10.239.45.11910.239.45.119
6110.239.45.120/3110.239.45.120 – 10.239.45.12110.239.45.121
6210.239.45.122/3110.239.45.122 – 10.239.45.12310.239.45.123
6310.239.45.124/3110.239.45.124 – 10.239.45.12510.239.45.125
6410.239.45.126/3110.239.45.126 – 10.239.45.12710.239.45.127
6510.239.45.128/3110.239.45.128 – 10.239.45.12910.239.45.129
6610.239.45.130/3110.239.45.130 – 10.239.45.13110.239.45.131
6710.239.45.132/3110.239.45.132 – 10.239.45.13310.239.45.133
6810.239.45.134/3110.239.45.134 – 10.239.45.13510.239.45.135
6910.239.45.136/3110.239.45.136 – 10.239.45.13710.239.45.137
7010.239.45.138/3110.239.45.138 – 10.239.45.13910.239.45.139
7110.239.45.140/3110.239.45.140 – 10.239.45.14110.239.45.141
7210.239.45.142/3110.239.45.142 – 10.239.45.14310.239.45.143
7310.239.45.144/3110.239.45.144 – 10.239.45.14510.239.45.145
7410.239.45.146/3110.239.45.146 – 10.239.45.14710.239.45.147
7510.239.45.148/3110.239.45.148 – 10.239.45.14910.239.45.149
7610.239.45.150/3110.239.45.150 – 10.239.45.15110.239.45.151
7710.239.45.152/3110.239.45.152 – 10.239.45.15310.239.45.153
7810.239.45.154/3110.239.45.154 – 10.239.45.15510.239.45.155
7910.239.45.156/3110.239.45.156 – 10.239.45.15710.239.45.157
8010.239.45.158/3110.239.45.158 – 10.239.45.15910.239.45.159
8110.239.45.160/3110.239.45.160 – 10.239.45.16110.239.45.161
8210.239.45.162/3110.239.45.162 – 10.239.45.16310.239.45.163
8310.239.45.164/3110.239.45.164 – 10.239.45.16510.239.45.165
8410.239.45.166/3110.239.45.166 – 10.239.45.16710.239.45.167
8510.239.45.168/3110.239.45.168 – 10.239.45.16910.239.45.169
8610.239.45.170/3110.239.45.170 – 10.239.45.17110.239.45.171
8710.239.45.172/3110.239.45.172 – 10.239.45.17310.239.45.173
8810.239.45.174/3110.239.45.174 – 10.239.45.17510.239.45.175
8910.239.45.176/3110.239.45.176 – 10.239.45.17710.239.45.177
9010.239.45.178/3110.239.45.178 – 10.239.45.17910.239.45.179
9110.239.45.180/3110.239.45.180 – 10.239.45.18110.239.45.181
9210.239.45.182/3110.239.45.182 – 10.239.45.18310.239.45.183
9310.239.45.184/3110.239.45.184 – 10.239.45.18510.239.45.185
9410.239.45.186/3110.239.45.186 – 10.239.45.18710.239.45.187
9510.239.45.188/3110.239.45.188 – 10.239.45.18910.239.45.189
9610.239.45.190/3110.239.45.190 – 10.239.45.19110.239.45.191
9710.239.45.192/3110.239.45.192 – 10.239.45.19310.239.45.193
9810.239.45.194/3110.239.45.194 – 10.239.45.19510.239.45.195
9910.239.45.196/3110.239.45.196 – 10.239.45.19710.239.45.197
10010.239.45.198/3110.239.45.198 – 10.239.45.19910.239.45.199
10110.239.45.200/3110.239.45.200 – 10.239.45.20110.239.45.201
10210.239.45.202/3110.239.45.202 – 10.239.45.20310.239.45.203
10310.239.45.204/3110.239.45.204 – 10.239.45.20510.239.45.205
10410.239.45.206/3110.239.45.206 – 10.239.45.20710.239.45.207
10510.239.45.208/3110.239.45.208 – 10.239.45.20910.239.45.209
10610.239.45.210/3110.239.45.210 – 10.239.45.21110.239.45.211
10710.239.45.212/3110.239.45.212 – 10.239.45.21310.239.45.213
10810.239.45.214/3110.239.45.214 – 10.239.45.21510.239.45.215
10910.239.45.216/3110.239.45.216 – 10.239.45.21710.239.45.217
11010.239.45.218/3110.239.45.218 – 10.239.45.21910.239.45.219
11110.239.45.220/3110.239.45.220 – 10.239.45.22110.239.45.221
11210.239.45.222/3110.239.45.222 – 10.239.45.22310.239.45.223
11310.239.45.224/3110.239.45.224 – 10.239.45.22510.239.45.225
11410.239.45.226/3110.239.45.226 – 10.239.45.22710.239.45.227
11510.239.45.228/3110.239.45.228 – 10.239.45.22910.239.45.229
11610.239.45.230/3110.239.45.230 – 10.239.45.23110.239.45.231
11710.239.45.232/3110.239.45.232 – 10.239.45.23310.239.45.233
11810.239.45.234/3110.239.45.234 – 10.239.45.23510.239.45.235
11910.239.45.236/3110.239.45.236 – 10.239.45.23710.239.45.237
12010.239.45.238/3110.239.45.238 – 10.239.45.23910.239.45.239
12110.239.45.240/3110.239.45.240 – 10.239.45.24110.239.45.241
12210.239.45.242/3110.239.45.242 – 10.239.45.24310.239.45.243
12310.239.45.244/3110.239.45.244 – 10.239.45.24510.239.45.245
12410.239.45.246/3110.239.45.246 – 10.239.45.24710.239.45.247
12510.239.45.248/3110.239.45.248 – 10.239.45.24910.239.45.249
12610.239.45.250/3110.239.45.250 – 10.239.45.25110.239.45.251
12710.239.45.252/3110.239.45.252 – 10.239.45.25310.239.45.253
12810.239.45.254/3110.239.45.254 – 10.239.45.25510.239.45.255
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 →