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)10.0.254.0/24
network10.0.254.0/24
broadcast10.0.254.255
first host10.0.254.1
last host10.0.254.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.0.254.0/24
address00001010.00000000.11111110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00000000.11111110.00000000
broadcast00001010.00000000.11111110.11111111
green = network part, grey = host part
hex0x0a00fe00
decimal167837184
reverse dns0.254.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:fe00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.254.0/3110.0.254.0 – 10.0.254.110.0.254.1
210.0.254.2/3110.0.254.2 – 10.0.254.310.0.254.3
310.0.254.4/3110.0.254.4 – 10.0.254.510.0.254.5
410.0.254.6/3110.0.254.6 – 10.0.254.710.0.254.7
510.0.254.8/3110.0.254.8 – 10.0.254.910.0.254.9
610.0.254.10/3110.0.254.10 – 10.0.254.1110.0.254.11
710.0.254.12/3110.0.254.12 – 10.0.254.1310.0.254.13
810.0.254.14/3110.0.254.14 – 10.0.254.1510.0.254.15
910.0.254.16/3110.0.254.16 – 10.0.254.1710.0.254.17
1010.0.254.18/3110.0.254.18 – 10.0.254.1910.0.254.19
1110.0.254.20/3110.0.254.20 – 10.0.254.2110.0.254.21
1210.0.254.22/3110.0.254.22 – 10.0.254.2310.0.254.23
1310.0.254.24/3110.0.254.24 – 10.0.254.2510.0.254.25
1410.0.254.26/3110.0.254.26 – 10.0.254.2710.0.254.27
1510.0.254.28/3110.0.254.28 – 10.0.254.2910.0.254.29
1610.0.254.30/3110.0.254.30 – 10.0.254.3110.0.254.31
1710.0.254.32/3110.0.254.32 – 10.0.254.3310.0.254.33
1810.0.254.34/3110.0.254.34 – 10.0.254.3510.0.254.35
1910.0.254.36/3110.0.254.36 – 10.0.254.3710.0.254.37
2010.0.254.38/3110.0.254.38 – 10.0.254.3910.0.254.39
2110.0.254.40/3110.0.254.40 – 10.0.254.4110.0.254.41
2210.0.254.42/3110.0.254.42 – 10.0.254.4310.0.254.43
2310.0.254.44/3110.0.254.44 – 10.0.254.4510.0.254.45
2410.0.254.46/3110.0.254.46 – 10.0.254.4710.0.254.47
2510.0.254.48/3110.0.254.48 – 10.0.254.4910.0.254.49
2610.0.254.50/3110.0.254.50 – 10.0.254.5110.0.254.51
2710.0.254.52/3110.0.254.52 – 10.0.254.5310.0.254.53
2810.0.254.54/3110.0.254.54 – 10.0.254.5510.0.254.55
2910.0.254.56/3110.0.254.56 – 10.0.254.5710.0.254.57
3010.0.254.58/3110.0.254.58 – 10.0.254.5910.0.254.59
3110.0.254.60/3110.0.254.60 – 10.0.254.6110.0.254.61
3210.0.254.62/3110.0.254.62 – 10.0.254.6310.0.254.63
3310.0.254.64/3110.0.254.64 – 10.0.254.6510.0.254.65
3410.0.254.66/3110.0.254.66 – 10.0.254.6710.0.254.67
3510.0.254.68/3110.0.254.68 – 10.0.254.6910.0.254.69
3610.0.254.70/3110.0.254.70 – 10.0.254.7110.0.254.71
3710.0.254.72/3110.0.254.72 – 10.0.254.7310.0.254.73
3810.0.254.74/3110.0.254.74 – 10.0.254.7510.0.254.75
3910.0.254.76/3110.0.254.76 – 10.0.254.7710.0.254.77
4010.0.254.78/3110.0.254.78 – 10.0.254.7910.0.254.79
4110.0.254.80/3110.0.254.80 – 10.0.254.8110.0.254.81
4210.0.254.82/3110.0.254.82 – 10.0.254.8310.0.254.83
4310.0.254.84/3110.0.254.84 – 10.0.254.8510.0.254.85
4410.0.254.86/3110.0.254.86 – 10.0.254.8710.0.254.87
4510.0.254.88/3110.0.254.88 – 10.0.254.8910.0.254.89
4610.0.254.90/3110.0.254.90 – 10.0.254.9110.0.254.91
4710.0.254.92/3110.0.254.92 – 10.0.254.9310.0.254.93
4810.0.254.94/3110.0.254.94 – 10.0.254.9510.0.254.95
4910.0.254.96/3110.0.254.96 – 10.0.254.9710.0.254.97
5010.0.254.98/3110.0.254.98 – 10.0.254.9910.0.254.99
5110.0.254.100/3110.0.254.100 – 10.0.254.10110.0.254.101
5210.0.254.102/3110.0.254.102 – 10.0.254.10310.0.254.103
5310.0.254.104/3110.0.254.104 – 10.0.254.10510.0.254.105
5410.0.254.106/3110.0.254.106 – 10.0.254.10710.0.254.107
5510.0.254.108/3110.0.254.108 – 10.0.254.10910.0.254.109
5610.0.254.110/3110.0.254.110 – 10.0.254.11110.0.254.111
5710.0.254.112/3110.0.254.112 – 10.0.254.11310.0.254.113
5810.0.254.114/3110.0.254.114 – 10.0.254.11510.0.254.115
5910.0.254.116/3110.0.254.116 – 10.0.254.11710.0.254.117
6010.0.254.118/3110.0.254.118 – 10.0.254.11910.0.254.119
6110.0.254.120/3110.0.254.120 – 10.0.254.12110.0.254.121
6210.0.254.122/3110.0.254.122 – 10.0.254.12310.0.254.123
6310.0.254.124/3110.0.254.124 – 10.0.254.12510.0.254.125
6410.0.254.126/3110.0.254.126 – 10.0.254.12710.0.254.127
6510.0.254.128/3110.0.254.128 – 10.0.254.12910.0.254.129
6610.0.254.130/3110.0.254.130 – 10.0.254.13110.0.254.131
6710.0.254.132/3110.0.254.132 – 10.0.254.13310.0.254.133
6810.0.254.134/3110.0.254.134 – 10.0.254.13510.0.254.135
6910.0.254.136/3110.0.254.136 – 10.0.254.13710.0.254.137
7010.0.254.138/3110.0.254.138 – 10.0.254.13910.0.254.139
7110.0.254.140/3110.0.254.140 – 10.0.254.14110.0.254.141
7210.0.254.142/3110.0.254.142 – 10.0.254.14310.0.254.143
7310.0.254.144/3110.0.254.144 – 10.0.254.14510.0.254.145
7410.0.254.146/3110.0.254.146 – 10.0.254.14710.0.254.147
7510.0.254.148/3110.0.254.148 – 10.0.254.14910.0.254.149
7610.0.254.150/3110.0.254.150 – 10.0.254.15110.0.254.151
7710.0.254.152/3110.0.254.152 – 10.0.254.15310.0.254.153
7810.0.254.154/3110.0.254.154 – 10.0.254.15510.0.254.155
7910.0.254.156/3110.0.254.156 – 10.0.254.15710.0.254.157
8010.0.254.158/3110.0.254.158 – 10.0.254.15910.0.254.159
8110.0.254.160/3110.0.254.160 – 10.0.254.16110.0.254.161
8210.0.254.162/3110.0.254.162 – 10.0.254.16310.0.254.163
8310.0.254.164/3110.0.254.164 – 10.0.254.16510.0.254.165
8410.0.254.166/3110.0.254.166 – 10.0.254.16710.0.254.167
8510.0.254.168/3110.0.254.168 – 10.0.254.16910.0.254.169
8610.0.254.170/3110.0.254.170 – 10.0.254.17110.0.254.171
8710.0.254.172/3110.0.254.172 – 10.0.254.17310.0.254.173
8810.0.254.174/3110.0.254.174 – 10.0.254.17510.0.254.175
8910.0.254.176/3110.0.254.176 – 10.0.254.17710.0.254.177
9010.0.254.178/3110.0.254.178 – 10.0.254.17910.0.254.179
9110.0.254.180/3110.0.254.180 – 10.0.254.18110.0.254.181
9210.0.254.182/3110.0.254.182 – 10.0.254.18310.0.254.183
9310.0.254.184/3110.0.254.184 – 10.0.254.18510.0.254.185
9410.0.254.186/3110.0.254.186 – 10.0.254.18710.0.254.187
9510.0.254.188/3110.0.254.188 – 10.0.254.18910.0.254.189
9610.0.254.190/3110.0.254.190 – 10.0.254.19110.0.254.191
9710.0.254.192/3110.0.254.192 – 10.0.254.19310.0.254.193
9810.0.254.194/3110.0.254.194 – 10.0.254.19510.0.254.195
9910.0.254.196/3110.0.254.196 – 10.0.254.19710.0.254.197
10010.0.254.198/3110.0.254.198 – 10.0.254.19910.0.254.199
10110.0.254.200/3110.0.254.200 – 10.0.254.20110.0.254.201
10210.0.254.202/3110.0.254.202 – 10.0.254.20310.0.254.203
10310.0.254.204/3110.0.254.204 – 10.0.254.20510.0.254.205
10410.0.254.206/3110.0.254.206 – 10.0.254.20710.0.254.207
10510.0.254.208/3110.0.254.208 – 10.0.254.20910.0.254.209
10610.0.254.210/3110.0.254.210 – 10.0.254.21110.0.254.211
10710.0.254.212/3110.0.254.212 – 10.0.254.21310.0.254.213
10810.0.254.214/3110.0.254.214 – 10.0.254.21510.0.254.215
10910.0.254.216/3110.0.254.216 – 10.0.254.21710.0.254.217
11010.0.254.218/3110.0.254.218 – 10.0.254.21910.0.254.219
11110.0.254.220/3110.0.254.220 – 10.0.254.22110.0.254.221
11210.0.254.222/3110.0.254.222 – 10.0.254.22310.0.254.223
11310.0.254.224/3110.0.254.224 – 10.0.254.22510.0.254.225
11410.0.254.226/3110.0.254.226 – 10.0.254.22710.0.254.227
11510.0.254.228/3110.0.254.228 – 10.0.254.22910.0.254.229
11610.0.254.230/3110.0.254.230 – 10.0.254.23110.0.254.231
11710.0.254.232/3110.0.254.232 – 10.0.254.23310.0.254.233
11810.0.254.234/3110.0.254.234 – 10.0.254.23510.0.254.235
11910.0.254.236/3110.0.254.236 – 10.0.254.23710.0.254.237
12010.0.254.238/3110.0.254.238 – 10.0.254.23910.0.254.239
12110.0.254.240/3110.0.254.240 – 10.0.254.24110.0.254.241
12210.0.254.242/3110.0.254.242 – 10.0.254.24310.0.254.243
12310.0.254.244/3110.0.254.244 – 10.0.254.24510.0.254.245
12410.0.254.246/3110.0.254.246 – 10.0.254.24710.0.254.247
12510.0.254.248/3110.0.254.248 – 10.0.254.24910.0.254.249
12610.0.254.250/3110.0.254.250 – 10.0.254.25110.0.254.251
12710.0.254.252/3110.0.254.252 – 10.0.254.25310.0.254.253
12810.0.254.254/3110.0.254.254 – 10.0.254.25510.0.254.255
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 →