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)10.45.75.0/24
network10.45.75.0/24
broadcast10.45.75.255
first host10.45.75.1
last host10.45.75.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.45.75.0/24
address00001010.00101101.01001011.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.00101101.01001011.00000000
broadcast00001010.00101101.01001011.11111111
green = network part, grey = host part
hex0x0a2d4b00
decimal170740480
reverse dns0.75.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:4b00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.45.75.0/3110.45.75.0 – 10.45.75.110.45.75.1
210.45.75.2/3110.45.75.2 – 10.45.75.310.45.75.3
310.45.75.4/3110.45.75.4 – 10.45.75.510.45.75.5
410.45.75.6/3110.45.75.6 – 10.45.75.710.45.75.7
510.45.75.8/3110.45.75.8 – 10.45.75.910.45.75.9
610.45.75.10/3110.45.75.10 – 10.45.75.1110.45.75.11
710.45.75.12/3110.45.75.12 – 10.45.75.1310.45.75.13
810.45.75.14/3110.45.75.14 – 10.45.75.1510.45.75.15
910.45.75.16/3110.45.75.16 – 10.45.75.1710.45.75.17
1010.45.75.18/3110.45.75.18 – 10.45.75.1910.45.75.19
1110.45.75.20/3110.45.75.20 – 10.45.75.2110.45.75.21
1210.45.75.22/3110.45.75.22 – 10.45.75.2310.45.75.23
1310.45.75.24/3110.45.75.24 – 10.45.75.2510.45.75.25
1410.45.75.26/3110.45.75.26 – 10.45.75.2710.45.75.27
1510.45.75.28/3110.45.75.28 – 10.45.75.2910.45.75.29
1610.45.75.30/3110.45.75.30 – 10.45.75.3110.45.75.31
1710.45.75.32/3110.45.75.32 – 10.45.75.3310.45.75.33
1810.45.75.34/3110.45.75.34 – 10.45.75.3510.45.75.35
1910.45.75.36/3110.45.75.36 – 10.45.75.3710.45.75.37
2010.45.75.38/3110.45.75.38 – 10.45.75.3910.45.75.39
2110.45.75.40/3110.45.75.40 – 10.45.75.4110.45.75.41
2210.45.75.42/3110.45.75.42 – 10.45.75.4310.45.75.43
2310.45.75.44/3110.45.75.44 – 10.45.75.4510.45.75.45
2410.45.75.46/3110.45.75.46 – 10.45.75.4710.45.75.47
2510.45.75.48/3110.45.75.48 – 10.45.75.4910.45.75.49
2610.45.75.50/3110.45.75.50 – 10.45.75.5110.45.75.51
2710.45.75.52/3110.45.75.52 – 10.45.75.5310.45.75.53
2810.45.75.54/3110.45.75.54 – 10.45.75.5510.45.75.55
2910.45.75.56/3110.45.75.56 – 10.45.75.5710.45.75.57
3010.45.75.58/3110.45.75.58 – 10.45.75.5910.45.75.59
3110.45.75.60/3110.45.75.60 – 10.45.75.6110.45.75.61
3210.45.75.62/3110.45.75.62 – 10.45.75.6310.45.75.63
3310.45.75.64/3110.45.75.64 – 10.45.75.6510.45.75.65
3410.45.75.66/3110.45.75.66 – 10.45.75.6710.45.75.67
3510.45.75.68/3110.45.75.68 – 10.45.75.6910.45.75.69
3610.45.75.70/3110.45.75.70 – 10.45.75.7110.45.75.71
3710.45.75.72/3110.45.75.72 – 10.45.75.7310.45.75.73
3810.45.75.74/3110.45.75.74 – 10.45.75.7510.45.75.75
3910.45.75.76/3110.45.75.76 – 10.45.75.7710.45.75.77
4010.45.75.78/3110.45.75.78 – 10.45.75.7910.45.75.79
4110.45.75.80/3110.45.75.80 – 10.45.75.8110.45.75.81
4210.45.75.82/3110.45.75.82 – 10.45.75.8310.45.75.83
4310.45.75.84/3110.45.75.84 – 10.45.75.8510.45.75.85
4410.45.75.86/3110.45.75.86 – 10.45.75.8710.45.75.87
4510.45.75.88/3110.45.75.88 – 10.45.75.8910.45.75.89
4610.45.75.90/3110.45.75.90 – 10.45.75.9110.45.75.91
4710.45.75.92/3110.45.75.92 – 10.45.75.9310.45.75.93
4810.45.75.94/3110.45.75.94 – 10.45.75.9510.45.75.95
4910.45.75.96/3110.45.75.96 – 10.45.75.9710.45.75.97
5010.45.75.98/3110.45.75.98 – 10.45.75.9910.45.75.99
5110.45.75.100/3110.45.75.100 – 10.45.75.10110.45.75.101
5210.45.75.102/3110.45.75.102 – 10.45.75.10310.45.75.103
5310.45.75.104/3110.45.75.104 – 10.45.75.10510.45.75.105
5410.45.75.106/3110.45.75.106 – 10.45.75.10710.45.75.107
5510.45.75.108/3110.45.75.108 – 10.45.75.10910.45.75.109
5610.45.75.110/3110.45.75.110 – 10.45.75.11110.45.75.111
5710.45.75.112/3110.45.75.112 – 10.45.75.11310.45.75.113
5810.45.75.114/3110.45.75.114 – 10.45.75.11510.45.75.115
5910.45.75.116/3110.45.75.116 – 10.45.75.11710.45.75.117
6010.45.75.118/3110.45.75.118 – 10.45.75.11910.45.75.119
6110.45.75.120/3110.45.75.120 – 10.45.75.12110.45.75.121
6210.45.75.122/3110.45.75.122 – 10.45.75.12310.45.75.123
6310.45.75.124/3110.45.75.124 – 10.45.75.12510.45.75.125
6410.45.75.126/3110.45.75.126 – 10.45.75.12710.45.75.127
6510.45.75.128/3110.45.75.128 – 10.45.75.12910.45.75.129
6610.45.75.130/3110.45.75.130 – 10.45.75.13110.45.75.131
6710.45.75.132/3110.45.75.132 – 10.45.75.13310.45.75.133
6810.45.75.134/3110.45.75.134 – 10.45.75.13510.45.75.135
6910.45.75.136/3110.45.75.136 – 10.45.75.13710.45.75.137
7010.45.75.138/3110.45.75.138 – 10.45.75.13910.45.75.139
7110.45.75.140/3110.45.75.140 – 10.45.75.14110.45.75.141
7210.45.75.142/3110.45.75.142 – 10.45.75.14310.45.75.143
7310.45.75.144/3110.45.75.144 – 10.45.75.14510.45.75.145
7410.45.75.146/3110.45.75.146 – 10.45.75.14710.45.75.147
7510.45.75.148/3110.45.75.148 – 10.45.75.14910.45.75.149
7610.45.75.150/3110.45.75.150 – 10.45.75.15110.45.75.151
7710.45.75.152/3110.45.75.152 – 10.45.75.15310.45.75.153
7810.45.75.154/3110.45.75.154 – 10.45.75.15510.45.75.155
7910.45.75.156/3110.45.75.156 – 10.45.75.15710.45.75.157
8010.45.75.158/3110.45.75.158 – 10.45.75.15910.45.75.159
8110.45.75.160/3110.45.75.160 – 10.45.75.16110.45.75.161
8210.45.75.162/3110.45.75.162 – 10.45.75.16310.45.75.163
8310.45.75.164/3110.45.75.164 – 10.45.75.16510.45.75.165
8410.45.75.166/3110.45.75.166 – 10.45.75.16710.45.75.167
8510.45.75.168/3110.45.75.168 – 10.45.75.16910.45.75.169
8610.45.75.170/3110.45.75.170 – 10.45.75.17110.45.75.171
8710.45.75.172/3110.45.75.172 – 10.45.75.17310.45.75.173
8810.45.75.174/3110.45.75.174 – 10.45.75.17510.45.75.175
8910.45.75.176/3110.45.75.176 – 10.45.75.17710.45.75.177
9010.45.75.178/3110.45.75.178 – 10.45.75.17910.45.75.179
9110.45.75.180/3110.45.75.180 – 10.45.75.18110.45.75.181
9210.45.75.182/3110.45.75.182 – 10.45.75.18310.45.75.183
9310.45.75.184/3110.45.75.184 – 10.45.75.18510.45.75.185
9410.45.75.186/3110.45.75.186 – 10.45.75.18710.45.75.187
9510.45.75.188/3110.45.75.188 – 10.45.75.18910.45.75.189
9610.45.75.190/3110.45.75.190 – 10.45.75.19110.45.75.191
9710.45.75.192/3110.45.75.192 – 10.45.75.19310.45.75.193
9810.45.75.194/3110.45.75.194 – 10.45.75.19510.45.75.195
9910.45.75.196/3110.45.75.196 – 10.45.75.19710.45.75.197
10010.45.75.198/3110.45.75.198 – 10.45.75.19910.45.75.199
10110.45.75.200/3110.45.75.200 – 10.45.75.20110.45.75.201
10210.45.75.202/3110.45.75.202 – 10.45.75.20310.45.75.203
10310.45.75.204/3110.45.75.204 – 10.45.75.20510.45.75.205
10410.45.75.206/3110.45.75.206 – 10.45.75.20710.45.75.207
10510.45.75.208/3110.45.75.208 – 10.45.75.20910.45.75.209
10610.45.75.210/3110.45.75.210 – 10.45.75.21110.45.75.211
10710.45.75.212/3110.45.75.212 – 10.45.75.21310.45.75.213
10810.45.75.214/3110.45.75.214 – 10.45.75.21510.45.75.215
10910.45.75.216/3110.45.75.216 – 10.45.75.21710.45.75.217
11010.45.75.218/3110.45.75.218 – 10.45.75.21910.45.75.219
11110.45.75.220/3110.45.75.220 – 10.45.75.22110.45.75.221
11210.45.75.222/3110.45.75.222 – 10.45.75.22310.45.75.223
11310.45.75.224/3110.45.75.224 – 10.45.75.22510.45.75.225
11410.45.75.226/3110.45.75.226 – 10.45.75.22710.45.75.227
11510.45.75.228/3110.45.75.228 – 10.45.75.22910.45.75.229
11610.45.75.230/3110.45.75.230 – 10.45.75.23110.45.75.231
11710.45.75.232/3110.45.75.232 – 10.45.75.23310.45.75.233
11810.45.75.234/3110.45.75.234 – 10.45.75.23510.45.75.235
11910.45.75.236/3110.45.75.236 – 10.45.75.23710.45.75.237
12010.45.75.238/3110.45.75.238 – 10.45.75.23910.45.75.239
12110.45.75.240/3110.45.75.240 – 10.45.75.24110.45.75.241
12210.45.75.242/3110.45.75.242 – 10.45.75.24310.45.75.243
12310.45.75.244/3110.45.75.244 – 10.45.75.24510.45.75.245
12410.45.75.246/3110.45.75.246 – 10.45.75.24710.45.75.247
12510.45.75.248/3110.45.75.248 – 10.45.75.24910.45.75.249
12610.45.75.250/3110.45.75.250 – 10.45.75.25110.45.75.251
12710.45.75.252/3110.45.75.252 – 10.45.75.25310.45.75.253
12810.45.75.254/3110.45.75.254 – 10.45.75.25510.45.75.255
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 →