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)10.45.90.0/24
network10.45.90.0/24
broadcast10.45.90.255
first host10.45.90.1
last host10.45.90.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.45.90.0/24
address00001010.00101101.01011010.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00101101.01011010.00000000
broadcast00001010.00101101.01011010.11111111
green = network part, grey = host part
hex0x0a2d5a00
decimal170744320
reverse dns0.90.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:5a00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.45.90.0/3110.45.90.0 – 10.45.90.110.45.90.1
210.45.90.2/3110.45.90.2 – 10.45.90.310.45.90.3
310.45.90.4/3110.45.90.4 – 10.45.90.510.45.90.5
410.45.90.6/3110.45.90.6 – 10.45.90.710.45.90.7
510.45.90.8/3110.45.90.8 – 10.45.90.910.45.90.9
610.45.90.10/3110.45.90.10 – 10.45.90.1110.45.90.11
710.45.90.12/3110.45.90.12 – 10.45.90.1310.45.90.13
810.45.90.14/3110.45.90.14 – 10.45.90.1510.45.90.15
910.45.90.16/3110.45.90.16 – 10.45.90.1710.45.90.17
1010.45.90.18/3110.45.90.18 – 10.45.90.1910.45.90.19
1110.45.90.20/3110.45.90.20 – 10.45.90.2110.45.90.21
1210.45.90.22/3110.45.90.22 – 10.45.90.2310.45.90.23
1310.45.90.24/3110.45.90.24 – 10.45.90.2510.45.90.25
1410.45.90.26/3110.45.90.26 – 10.45.90.2710.45.90.27
1510.45.90.28/3110.45.90.28 – 10.45.90.2910.45.90.29
1610.45.90.30/3110.45.90.30 – 10.45.90.3110.45.90.31
1710.45.90.32/3110.45.90.32 – 10.45.90.3310.45.90.33
1810.45.90.34/3110.45.90.34 – 10.45.90.3510.45.90.35
1910.45.90.36/3110.45.90.36 – 10.45.90.3710.45.90.37
2010.45.90.38/3110.45.90.38 – 10.45.90.3910.45.90.39
2110.45.90.40/3110.45.90.40 – 10.45.90.4110.45.90.41
2210.45.90.42/3110.45.90.42 – 10.45.90.4310.45.90.43
2310.45.90.44/3110.45.90.44 – 10.45.90.4510.45.90.45
2410.45.90.46/3110.45.90.46 – 10.45.90.4710.45.90.47
2510.45.90.48/3110.45.90.48 – 10.45.90.4910.45.90.49
2610.45.90.50/3110.45.90.50 – 10.45.90.5110.45.90.51
2710.45.90.52/3110.45.90.52 – 10.45.90.5310.45.90.53
2810.45.90.54/3110.45.90.54 – 10.45.90.5510.45.90.55
2910.45.90.56/3110.45.90.56 – 10.45.90.5710.45.90.57
3010.45.90.58/3110.45.90.58 – 10.45.90.5910.45.90.59
3110.45.90.60/3110.45.90.60 – 10.45.90.6110.45.90.61
3210.45.90.62/3110.45.90.62 – 10.45.90.6310.45.90.63
3310.45.90.64/3110.45.90.64 – 10.45.90.6510.45.90.65
3410.45.90.66/3110.45.90.66 – 10.45.90.6710.45.90.67
3510.45.90.68/3110.45.90.68 – 10.45.90.6910.45.90.69
3610.45.90.70/3110.45.90.70 – 10.45.90.7110.45.90.71
3710.45.90.72/3110.45.90.72 – 10.45.90.7310.45.90.73
3810.45.90.74/3110.45.90.74 – 10.45.90.7510.45.90.75
3910.45.90.76/3110.45.90.76 – 10.45.90.7710.45.90.77
4010.45.90.78/3110.45.90.78 – 10.45.90.7910.45.90.79
4110.45.90.80/3110.45.90.80 – 10.45.90.8110.45.90.81
4210.45.90.82/3110.45.90.82 – 10.45.90.8310.45.90.83
4310.45.90.84/3110.45.90.84 – 10.45.90.8510.45.90.85
4410.45.90.86/3110.45.90.86 – 10.45.90.8710.45.90.87
4510.45.90.88/3110.45.90.88 – 10.45.90.8910.45.90.89
4610.45.90.90/3110.45.90.90 – 10.45.90.9110.45.90.91
4710.45.90.92/3110.45.90.92 – 10.45.90.9310.45.90.93
4810.45.90.94/3110.45.90.94 – 10.45.90.9510.45.90.95
4910.45.90.96/3110.45.90.96 – 10.45.90.9710.45.90.97
5010.45.90.98/3110.45.90.98 – 10.45.90.9910.45.90.99
5110.45.90.100/3110.45.90.100 – 10.45.90.10110.45.90.101
5210.45.90.102/3110.45.90.102 – 10.45.90.10310.45.90.103
5310.45.90.104/3110.45.90.104 – 10.45.90.10510.45.90.105
5410.45.90.106/3110.45.90.106 – 10.45.90.10710.45.90.107
5510.45.90.108/3110.45.90.108 – 10.45.90.10910.45.90.109
5610.45.90.110/3110.45.90.110 – 10.45.90.11110.45.90.111
5710.45.90.112/3110.45.90.112 – 10.45.90.11310.45.90.113
5810.45.90.114/3110.45.90.114 – 10.45.90.11510.45.90.115
5910.45.90.116/3110.45.90.116 – 10.45.90.11710.45.90.117
6010.45.90.118/3110.45.90.118 – 10.45.90.11910.45.90.119
6110.45.90.120/3110.45.90.120 – 10.45.90.12110.45.90.121
6210.45.90.122/3110.45.90.122 – 10.45.90.12310.45.90.123
6310.45.90.124/3110.45.90.124 – 10.45.90.12510.45.90.125
6410.45.90.126/3110.45.90.126 – 10.45.90.12710.45.90.127
6510.45.90.128/3110.45.90.128 – 10.45.90.12910.45.90.129
6610.45.90.130/3110.45.90.130 – 10.45.90.13110.45.90.131
6710.45.90.132/3110.45.90.132 – 10.45.90.13310.45.90.133
6810.45.90.134/3110.45.90.134 – 10.45.90.13510.45.90.135
6910.45.90.136/3110.45.90.136 – 10.45.90.13710.45.90.137
7010.45.90.138/3110.45.90.138 – 10.45.90.13910.45.90.139
7110.45.90.140/3110.45.90.140 – 10.45.90.14110.45.90.141
7210.45.90.142/3110.45.90.142 – 10.45.90.14310.45.90.143
7310.45.90.144/3110.45.90.144 – 10.45.90.14510.45.90.145
7410.45.90.146/3110.45.90.146 – 10.45.90.14710.45.90.147
7510.45.90.148/3110.45.90.148 – 10.45.90.14910.45.90.149
7610.45.90.150/3110.45.90.150 – 10.45.90.15110.45.90.151
7710.45.90.152/3110.45.90.152 – 10.45.90.15310.45.90.153
7810.45.90.154/3110.45.90.154 – 10.45.90.15510.45.90.155
7910.45.90.156/3110.45.90.156 – 10.45.90.15710.45.90.157
8010.45.90.158/3110.45.90.158 – 10.45.90.15910.45.90.159
8110.45.90.160/3110.45.90.160 – 10.45.90.16110.45.90.161
8210.45.90.162/3110.45.90.162 – 10.45.90.16310.45.90.163
8310.45.90.164/3110.45.90.164 – 10.45.90.16510.45.90.165
8410.45.90.166/3110.45.90.166 – 10.45.90.16710.45.90.167
8510.45.90.168/3110.45.90.168 – 10.45.90.16910.45.90.169
8610.45.90.170/3110.45.90.170 – 10.45.90.17110.45.90.171
8710.45.90.172/3110.45.90.172 – 10.45.90.17310.45.90.173
8810.45.90.174/3110.45.90.174 – 10.45.90.17510.45.90.175
8910.45.90.176/3110.45.90.176 – 10.45.90.17710.45.90.177
9010.45.90.178/3110.45.90.178 – 10.45.90.17910.45.90.179
9110.45.90.180/3110.45.90.180 – 10.45.90.18110.45.90.181
9210.45.90.182/3110.45.90.182 – 10.45.90.18310.45.90.183
9310.45.90.184/3110.45.90.184 – 10.45.90.18510.45.90.185
9410.45.90.186/3110.45.90.186 – 10.45.90.18710.45.90.187
9510.45.90.188/3110.45.90.188 – 10.45.90.18910.45.90.189
9610.45.90.190/3110.45.90.190 – 10.45.90.19110.45.90.191
9710.45.90.192/3110.45.90.192 – 10.45.90.19310.45.90.193
9810.45.90.194/3110.45.90.194 – 10.45.90.19510.45.90.195
9910.45.90.196/3110.45.90.196 – 10.45.90.19710.45.90.197
10010.45.90.198/3110.45.90.198 – 10.45.90.19910.45.90.199
10110.45.90.200/3110.45.90.200 – 10.45.90.20110.45.90.201
10210.45.90.202/3110.45.90.202 – 10.45.90.20310.45.90.203
10310.45.90.204/3110.45.90.204 – 10.45.90.20510.45.90.205
10410.45.90.206/3110.45.90.206 – 10.45.90.20710.45.90.207
10510.45.90.208/3110.45.90.208 – 10.45.90.20910.45.90.209
10610.45.90.210/3110.45.90.210 – 10.45.90.21110.45.90.211
10710.45.90.212/3110.45.90.212 – 10.45.90.21310.45.90.213
10810.45.90.214/3110.45.90.214 – 10.45.90.21510.45.90.215
10910.45.90.216/3110.45.90.216 – 10.45.90.21710.45.90.217
11010.45.90.218/3110.45.90.218 – 10.45.90.21910.45.90.219
11110.45.90.220/3110.45.90.220 – 10.45.90.22110.45.90.221
11210.45.90.222/3110.45.90.222 – 10.45.90.22310.45.90.223
11310.45.90.224/3110.45.90.224 – 10.45.90.22510.45.90.225
11410.45.90.226/3110.45.90.226 – 10.45.90.22710.45.90.227
11510.45.90.228/3110.45.90.228 – 10.45.90.22910.45.90.229
11610.45.90.230/3110.45.90.230 – 10.45.90.23110.45.90.231
11710.45.90.232/3110.45.90.232 – 10.45.90.23310.45.90.233
11810.45.90.234/3110.45.90.234 – 10.45.90.23510.45.90.235
11910.45.90.236/3110.45.90.236 – 10.45.90.23710.45.90.237
12010.45.90.238/3110.45.90.238 – 10.45.90.23910.45.90.239
12110.45.90.240/3110.45.90.240 – 10.45.90.24110.45.90.241
12210.45.90.242/3110.45.90.242 – 10.45.90.24310.45.90.243
12310.45.90.244/3110.45.90.244 – 10.45.90.24510.45.90.245
12410.45.90.246/3110.45.90.246 – 10.45.90.24710.45.90.247
12510.45.90.248/3110.45.90.248 – 10.45.90.24910.45.90.249
12610.45.90.250/3110.45.90.250 – 10.45.90.25110.45.90.251
12710.45.90.252/3110.45.90.252 – 10.45.90.25310.45.90.253
12810.45.90.254/3110.45.90.254 – 10.45.90.25510.45.90.255
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 →