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)10.64.45.0/24
network10.64.45.0/24
broadcast10.64.45.255
first host10.64.45.1
last host10.64.45.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.64.45.0/24
address00001010.01000000.00101101.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01000000.00101101.00000000
broadcast00001010.01000000.00101101.11111111
green = network part, grey = host part
hex0x0a402d00
decimal171977984
reverse dns0.45.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:2d00

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.64.45.0/3110.64.45.0 – 10.64.45.110.64.45.1
210.64.45.2/3110.64.45.2 – 10.64.45.310.64.45.3
310.64.45.4/3110.64.45.4 – 10.64.45.510.64.45.5
410.64.45.6/3110.64.45.6 – 10.64.45.710.64.45.7
510.64.45.8/3110.64.45.8 – 10.64.45.910.64.45.9
610.64.45.10/3110.64.45.10 – 10.64.45.1110.64.45.11
710.64.45.12/3110.64.45.12 – 10.64.45.1310.64.45.13
810.64.45.14/3110.64.45.14 – 10.64.45.1510.64.45.15
910.64.45.16/3110.64.45.16 – 10.64.45.1710.64.45.17
1010.64.45.18/3110.64.45.18 – 10.64.45.1910.64.45.19
1110.64.45.20/3110.64.45.20 – 10.64.45.2110.64.45.21
1210.64.45.22/3110.64.45.22 – 10.64.45.2310.64.45.23
1310.64.45.24/3110.64.45.24 – 10.64.45.2510.64.45.25
1410.64.45.26/3110.64.45.26 – 10.64.45.2710.64.45.27
1510.64.45.28/3110.64.45.28 – 10.64.45.2910.64.45.29
1610.64.45.30/3110.64.45.30 – 10.64.45.3110.64.45.31
1710.64.45.32/3110.64.45.32 – 10.64.45.3310.64.45.33
1810.64.45.34/3110.64.45.34 – 10.64.45.3510.64.45.35
1910.64.45.36/3110.64.45.36 – 10.64.45.3710.64.45.37
2010.64.45.38/3110.64.45.38 – 10.64.45.3910.64.45.39
2110.64.45.40/3110.64.45.40 – 10.64.45.4110.64.45.41
2210.64.45.42/3110.64.45.42 – 10.64.45.4310.64.45.43
2310.64.45.44/3110.64.45.44 – 10.64.45.4510.64.45.45
2410.64.45.46/3110.64.45.46 – 10.64.45.4710.64.45.47
2510.64.45.48/3110.64.45.48 – 10.64.45.4910.64.45.49
2610.64.45.50/3110.64.45.50 – 10.64.45.5110.64.45.51
2710.64.45.52/3110.64.45.52 – 10.64.45.5310.64.45.53
2810.64.45.54/3110.64.45.54 – 10.64.45.5510.64.45.55
2910.64.45.56/3110.64.45.56 – 10.64.45.5710.64.45.57
3010.64.45.58/3110.64.45.58 – 10.64.45.5910.64.45.59
3110.64.45.60/3110.64.45.60 – 10.64.45.6110.64.45.61
3210.64.45.62/3110.64.45.62 – 10.64.45.6310.64.45.63
3310.64.45.64/3110.64.45.64 – 10.64.45.6510.64.45.65
3410.64.45.66/3110.64.45.66 – 10.64.45.6710.64.45.67
3510.64.45.68/3110.64.45.68 – 10.64.45.6910.64.45.69
3610.64.45.70/3110.64.45.70 – 10.64.45.7110.64.45.71
3710.64.45.72/3110.64.45.72 – 10.64.45.7310.64.45.73
3810.64.45.74/3110.64.45.74 – 10.64.45.7510.64.45.75
3910.64.45.76/3110.64.45.76 – 10.64.45.7710.64.45.77
4010.64.45.78/3110.64.45.78 – 10.64.45.7910.64.45.79
4110.64.45.80/3110.64.45.80 – 10.64.45.8110.64.45.81
4210.64.45.82/3110.64.45.82 – 10.64.45.8310.64.45.83
4310.64.45.84/3110.64.45.84 – 10.64.45.8510.64.45.85
4410.64.45.86/3110.64.45.86 – 10.64.45.8710.64.45.87
4510.64.45.88/3110.64.45.88 – 10.64.45.8910.64.45.89
4610.64.45.90/3110.64.45.90 – 10.64.45.9110.64.45.91
4710.64.45.92/3110.64.45.92 – 10.64.45.9310.64.45.93
4810.64.45.94/3110.64.45.94 – 10.64.45.9510.64.45.95
4910.64.45.96/3110.64.45.96 – 10.64.45.9710.64.45.97
5010.64.45.98/3110.64.45.98 – 10.64.45.9910.64.45.99
5110.64.45.100/3110.64.45.100 – 10.64.45.10110.64.45.101
5210.64.45.102/3110.64.45.102 – 10.64.45.10310.64.45.103
5310.64.45.104/3110.64.45.104 – 10.64.45.10510.64.45.105
5410.64.45.106/3110.64.45.106 – 10.64.45.10710.64.45.107
5510.64.45.108/3110.64.45.108 – 10.64.45.10910.64.45.109
5610.64.45.110/3110.64.45.110 – 10.64.45.11110.64.45.111
5710.64.45.112/3110.64.45.112 – 10.64.45.11310.64.45.113
5810.64.45.114/3110.64.45.114 – 10.64.45.11510.64.45.115
5910.64.45.116/3110.64.45.116 – 10.64.45.11710.64.45.117
6010.64.45.118/3110.64.45.118 – 10.64.45.11910.64.45.119
6110.64.45.120/3110.64.45.120 – 10.64.45.12110.64.45.121
6210.64.45.122/3110.64.45.122 – 10.64.45.12310.64.45.123
6310.64.45.124/3110.64.45.124 – 10.64.45.12510.64.45.125
6410.64.45.126/3110.64.45.126 – 10.64.45.12710.64.45.127
6510.64.45.128/3110.64.45.128 – 10.64.45.12910.64.45.129
6610.64.45.130/3110.64.45.130 – 10.64.45.13110.64.45.131
6710.64.45.132/3110.64.45.132 – 10.64.45.13310.64.45.133
6810.64.45.134/3110.64.45.134 – 10.64.45.13510.64.45.135
6910.64.45.136/3110.64.45.136 – 10.64.45.13710.64.45.137
7010.64.45.138/3110.64.45.138 – 10.64.45.13910.64.45.139
7110.64.45.140/3110.64.45.140 – 10.64.45.14110.64.45.141
7210.64.45.142/3110.64.45.142 – 10.64.45.14310.64.45.143
7310.64.45.144/3110.64.45.144 – 10.64.45.14510.64.45.145
7410.64.45.146/3110.64.45.146 – 10.64.45.14710.64.45.147
7510.64.45.148/3110.64.45.148 – 10.64.45.14910.64.45.149
7610.64.45.150/3110.64.45.150 – 10.64.45.15110.64.45.151
7710.64.45.152/3110.64.45.152 – 10.64.45.15310.64.45.153
7810.64.45.154/3110.64.45.154 – 10.64.45.15510.64.45.155
7910.64.45.156/3110.64.45.156 – 10.64.45.15710.64.45.157
8010.64.45.158/3110.64.45.158 – 10.64.45.15910.64.45.159
8110.64.45.160/3110.64.45.160 – 10.64.45.16110.64.45.161
8210.64.45.162/3110.64.45.162 – 10.64.45.16310.64.45.163
8310.64.45.164/3110.64.45.164 – 10.64.45.16510.64.45.165
8410.64.45.166/3110.64.45.166 – 10.64.45.16710.64.45.167
8510.64.45.168/3110.64.45.168 – 10.64.45.16910.64.45.169
8610.64.45.170/3110.64.45.170 – 10.64.45.17110.64.45.171
8710.64.45.172/3110.64.45.172 – 10.64.45.17310.64.45.173
8810.64.45.174/3110.64.45.174 – 10.64.45.17510.64.45.175
8910.64.45.176/3110.64.45.176 – 10.64.45.17710.64.45.177
9010.64.45.178/3110.64.45.178 – 10.64.45.17910.64.45.179
9110.64.45.180/3110.64.45.180 – 10.64.45.18110.64.45.181
9210.64.45.182/3110.64.45.182 – 10.64.45.18310.64.45.183
9310.64.45.184/3110.64.45.184 – 10.64.45.18510.64.45.185
9410.64.45.186/3110.64.45.186 – 10.64.45.18710.64.45.187
9510.64.45.188/3110.64.45.188 – 10.64.45.18910.64.45.189
9610.64.45.190/3110.64.45.190 – 10.64.45.19110.64.45.191
9710.64.45.192/3110.64.45.192 – 10.64.45.19310.64.45.193
9810.64.45.194/3110.64.45.194 – 10.64.45.19510.64.45.195
9910.64.45.196/3110.64.45.196 – 10.64.45.19710.64.45.197
10010.64.45.198/3110.64.45.198 – 10.64.45.19910.64.45.199
10110.64.45.200/3110.64.45.200 – 10.64.45.20110.64.45.201
10210.64.45.202/3110.64.45.202 – 10.64.45.20310.64.45.203
10310.64.45.204/3110.64.45.204 – 10.64.45.20510.64.45.205
10410.64.45.206/3110.64.45.206 – 10.64.45.20710.64.45.207
10510.64.45.208/3110.64.45.208 – 10.64.45.20910.64.45.209
10610.64.45.210/3110.64.45.210 – 10.64.45.21110.64.45.211
10710.64.45.212/3110.64.45.212 – 10.64.45.21310.64.45.213
10810.64.45.214/3110.64.45.214 – 10.64.45.21510.64.45.215
10910.64.45.216/3110.64.45.216 – 10.64.45.21710.64.45.217
11010.64.45.218/3110.64.45.218 – 10.64.45.21910.64.45.219
11110.64.45.220/3110.64.45.220 – 10.64.45.22110.64.45.221
11210.64.45.222/3110.64.45.222 – 10.64.45.22310.64.45.223
11310.64.45.224/3110.64.45.224 – 10.64.45.22510.64.45.225
11410.64.45.226/3110.64.45.226 – 10.64.45.22710.64.45.227
11510.64.45.228/3110.64.45.228 – 10.64.45.22910.64.45.229
11610.64.45.230/3110.64.45.230 – 10.64.45.23110.64.45.231
11710.64.45.232/3110.64.45.232 – 10.64.45.23310.64.45.233
11810.64.45.234/3110.64.45.234 – 10.64.45.23510.64.45.235
11910.64.45.236/3110.64.45.236 – 10.64.45.23710.64.45.237
12010.64.45.238/3110.64.45.238 – 10.64.45.23910.64.45.239
12110.64.45.240/3110.64.45.240 – 10.64.45.24110.64.45.241
12210.64.45.242/3110.64.45.242 – 10.64.45.24310.64.45.243
12310.64.45.244/3110.64.45.244 – 10.64.45.24510.64.45.245
12410.64.45.246/3110.64.45.246 – 10.64.45.24710.64.45.247
12510.64.45.248/3110.64.45.248 – 10.64.45.24910.64.45.249
12610.64.45.250/3110.64.45.250 – 10.64.45.25110.64.45.251
12710.64.45.252/3110.64.45.252 – 10.64.45.25310.64.45.253
12810.64.45.254/3110.64.45.254 – 10.64.45.25510.64.45.255
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 →