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)10.2.42.0/24
network10.2.42.0/24
broadcast10.2.42.255
first host10.2.42.1
last host10.2.42.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.2.42.0/24
address00001010.00000010.00101010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000010.00101010.00000000
broadcast00001010.00000010.00101010.11111111
green = network part, grey = host part
hex0x0a022a00
decimal167913984
reverse dns0.42.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:2a00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.42.0/3110.2.42.0 – 10.2.42.110.2.42.1
210.2.42.2/3110.2.42.2 – 10.2.42.310.2.42.3
310.2.42.4/3110.2.42.4 – 10.2.42.510.2.42.5
410.2.42.6/3110.2.42.6 – 10.2.42.710.2.42.7
510.2.42.8/3110.2.42.8 – 10.2.42.910.2.42.9
610.2.42.10/3110.2.42.10 – 10.2.42.1110.2.42.11
710.2.42.12/3110.2.42.12 – 10.2.42.1310.2.42.13
810.2.42.14/3110.2.42.14 – 10.2.42.1510.2.42.15
910.2.42.16/3110.2.42.16 – 10.2.42.1710.2.42.17
1010.2.42.18/3110.2.42.18 – 10.2.42.1910.2.42.19
1110.2.42.20/3110.2.42.20 – 10.2.42.2110.2.42.21
1210.2.42.22/3110.2.42.22 – 10.2.42.2310.2.42.23
1310.2.42.24/3110.2.42.24 – 10.2.42.2510.2.42.25
1410.2.42.26/3110.2.42.26 – 10.2.42.2710.2.42.27
1510.2.42.28/3110.2.42.28 – 10.2.42.2910.2.42.29
1610.2.42.30/3110.2.42.30 – 10.2.42.3110.2.42.31
1710.2.42.32/3110.2.42.32 – 10.2.42.3310.2.42.33
1810.2.42.34/3110.2.42.34 – 10.2.42.3510.2.42.35
1910.2.42.36/3110.2.42.36 – 10.2.42.3710.2.42.37
2010.2.42.38/3110.2.42.38 – 10.2.42.3910.2.42.39
2110.2.42.40/3110.2.42.40 – 10.2.42.4110.2.42.41
2210.2.42.42/3110.2.42.42 – 10.2.42.4310.2.42.43
2310.2.42.44/3110.2.42.44 – 10.2.42.4510.2.42.45
2410.2.42.46/3110.2.42.46 – 10.2.42.4710.2.42.47
2510.2.42.48/3110.2.42.48 – 10.2.42.4910.2.42.49
2610.2.42.50/3110.2.42.50 – 10.2.42.5110.2.42.51
2710.2.42.52/3110.2.42.52 – 10.2.42.5310.2.42.53
2810.2.42.54/3110.2.42.54 – 10.2.42.5510.2.42.55
2910.2.42.56/3110.2.42.56 – 10.2.42.5710.2.42.57
3010.2.42.58/3110.2.42.58 – 10.2.42.5910.2.42.59
3110.2.42.60/3110.2.42.60 – 10.2.42.6110.2.42.61
3210.2.42.62/3110.2.42.62 – 10.2.42.6310.2.42.63
3310.2.42.64/3110.2.42.64 – 10.2.42.6510.2.42.65
3410.2.42.66/3110.2.42.66 – 10.2.42.6710.2.42.67
3510.2.42.68/3110.2.42.68 – 10.2.42.6910.2.42.69
3610.2.42.70/3110.2.42.70 – 10.2.42.7110.2.42.71
3710.2.42.72/3110.2.42.72 – 10.2.42.7310.2.42.73
3810.2.42.74/3110.2.42.74 – 10.2.42.7510.2.42.75
3910.2.42.76/3110.2.42.76 – 10.2.42.7710.2.42.77
4010.2.42.78/3110.2.42.78 – 10.2.42.7910.2.42.79
4110.2.42.80/3110.2.42.80 – 10.2.42.8110.2.42.81
4210.2.42.82/3110.2.42.82 – 10.2.42.8310.2.42.83
4310.2.42.84/3110.2.42.84 – 10.2.42.8510.2.42.85
4410.2.42.86/3110.2.42.86 – 10.2.42.8710.2.42.87
4510.2.42.88/3110.2.42.88 – 10.2.42.8910.2.42.89
4610.2.42.90/3110.2.42.90 – 10.2.42.9110.2.42.91
4710.2.42.92/3110.2.42.92 – 10.2.42.9310.2.42.93
4810.2.42.94/3110.2.42.94 – 10.2.42.9510.2.42.95
4910.2.42.96/3110.2.42.96 – 10.2.42.9710.2.42.97
5010.2.42.98/3110.2.42.98 – 10.2.42.9910.2.42.99
5110.2.42.100/3110.2.42.100 – 10.2.42.10110.2.42.101
5210.2.42.102/3110.2.42.102 – 10.2.42.10310.2.42.103
5310.2.42.104/3110.2.42.104 – 10.2.42.10510.2.42.105
5410.2.42.106/3110.2.42.106 – 10.2.42.10710.2.42.107
5510.2.42.108/3110.2.42.108 – 10.2.42.10910.2.42.109
5610.2.42.110/3110.2.42.110 – 10.2.42.11110.2.42.111
5710.2.42.112/3110.2.42.112 – 10.2.42.11310.2.42.113
5810.2.42.114/3110.2.42.114 – 10.2.42.11510.2.42.115
5910.2.42.116/3110.2.42.116 – 10.2.42.11710.2.42.117
6010.2.42.118/3110.2.42.118 – 10.2.42.11910.2.42.119
6110.2.42.120/3110.2.42.120 – 10.2.42.12110.2.42.121
6210.2.42.122/3110.2.42.122 – 10.2.42.12310.2.42.123
6310.2.42.124/3110.2.42.124 – 10.2.42.12510.2.42.125
6410.2.42.126/3110.2.42.126 – 10.2.42.12710.2.42.127
6510.2.42.128/3110.2.42.128 – 10.2.42.12910.2.42.129
6610.2.42.130/3110.2.42.130 – 10.2.42.13110.2.42.131
6710.2.42.132/3110.2.42.132 – 10.2.42.13310.2.42.133
6810.2.42.134/3110.2.42.134 – 10.2.42.13510.2.42.135
6910.2.42.136/3110.2.42.136 – 10.2.42.13710.2.42.137
7010.2.42.138/3110.2.42.138 – 10.2.42.13910.2.42.139
7110.2.42.140/3110.2.42.140 – 10.2.42.14110.2.42.141
7210.2.42.142/3110.2.42.142 – 10.2.42.14310.2.42.143
7310.2.42.144/3110.2.42.144 – 10.2.42.14510.2.42.145
7410.2.42.146/3110.2.42.146 – 10.2.42.14710.2.42.147
7510.2.42.148/3110.2.42.148 – 10.2.42.14910.2.42.149
7610.2.42.150/3110.2.42.150 – 10.2.42.15110.2.42.151
7710.2.42.152/3110.2.42.152 – 10.2.42.15310.2.42.153
7810.2.42.154/3110.2.42.154 – 10.2.42.15510.2.42.155
7910.2.42.156/3110.2.42.156 – 10.2.42.15710.2.42.157
8010.2.42.158/3110.2.42.158 – 10.2.42.15910.2.42.159
8110.2.42.160/3110.2.42.160 – 10.2.42.16110.2.42.161
8210.2.42.162/3110.2.42.162 – 10.2.42.16310.2.42.163
8310.2.42.164/3110.2.42.164 – 10.2.42.16510.2.42.165
8410.2.42.166/3110.2.42.166 – 10.2.42.16710.2.42.167
8510.2.42.168/3110.2.42.168 – 10.2.42.16910.2.42.169
8610.2.42.170/3110.2.42.170 – 10.2.42.17110.2.42.171
8710.2.42.172/3110.2.42.172 – 10.2.42.17310.2.42.173
8810.2.42.174/3110.2.42.174 – 10.2.42.17510.2.42.175
8910.2.42.176/3110.2.42.176 – 10.2.42.17710.2.42.177
9010.2.42.178/3110.2.42.178 – 10.2.42.17910.2.42.179
9110.2.42.180/3110.2.42.180 – 10.2.42.18110.2.42.181
9210.2.42.182/3110.2.42.182 – 10.2.42.18310.2.42.183
9310.2.42.184/3110.2.42.184 – 10.2.42.18510.2.42.185
9410.2.42.186/3110.2.42.186 – 10.2.42.18710.2.42.187
9510.2.42.188/3110.2.42.188 – 10.2.42.18910.2.42.189
9610.2.42.190/3110.2.42.190 – 10.2.42.19110.2.42.191
9710.2.42.192/3110.2.42.192 – 10.2.42.19310.2.42.193
9810.2.42.194/3110.2.42.194 – 10.2.42.19510.2.42.195
9910.2.42.196/3110.2.42.196 – 10.2.42.19710.2.42.197
10010.2.42.198/3110.2.42.198 – 10.2.42.19910.2.42.199
10110.2.42.200/3110.2.42.200 – 10.2.42.20110.2.42.201
10210.2.42.202/3110.2.42.202 – 10.2.42.20310.2.42.203
10310.2.42.204/3110.2.42.204 – 10.2.42.20510.2.42.205
10410.2.42.206/3110.2.42.206 – 10.2.42.20710.2.42.207
10510.2.42.208/3110.2.42.208 – 10.2.42.20910.2.42.209
10610.2.42.210/3110.2.42.210 – 10.2.42.21110.2.42.211
10710.2.42.212/3110.2.42.212 – 10.2.42.21310.2.42.213
10810.2.42.214/3110.2.42.214 – 10.2.42.21510.2.42.215
10910.2.42.216/3110.2.42.216 – 10.2.42.21710.2.42.217
11010.2.42.218/3110.2.42.218 – 10.2.42.21910.2.42.219
11110.2.42.220/3110.2.42.220 – 10.2.42.22110.2.42.221
11210.2.42.222/3110.2.42.222 – 10.2.42.22310.2.42.223
11310.2.42.224/3110.2.42.224 – 10.2.42.22510.2.42.225
11410.2.42.226/3110.2.42.226 – 10.2.42.22710.2.42.227
11510.2.42.228/3110.2.42.228 – 10.2.42.22910.2.42.229
11610.2.42.230/3110.2.42.230 – 10.2.42.23110.2.42.231
11710.2.42.232/3110.2.42.232 – 10.2.42.23310.2.42.233
11810.2.42.234/3110.2.42.234 – 10.2.42.23510.2.42.235
11910.2.42.236/3110.2.42.236 – 10.2.42.23710.2.42.237
12010.2.42.238/3110.2.42.238 – 10.2.42.23910.2.42.239
12110.2.42.240/3110.2.42.240 – 10.2.42.24110.2.42.241
12210.2.42.242/3110.2.42.242 – 10.2.42.24310.2.42.243
12310.2.42.244/3110.2.42.244 – 10.2.42.24510.2.42.245
12410.2.42.246/3110.2.42.246 – 10.2.42.24710.2.42.247
12510.2.42.248/3110.2.42.248 – 10.2.42.24910.2.42.249
12610.2.42.250/3110.2.42.250 – 10.2.42.25110.2.42.251
12710.2.42.252/3110.2.42.252 – 10.2.42.25310.2.42.253
12810.2.42.254/3110.2.42.254 – 10.2.42.25510.2.42.255
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 →