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)10.64.89.0/24
network10.64.89.0/24
broadcast10.64.89.255
first host10.64.89.1
last host10.64.89.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.64.89.0/24
address00001010.01000000.01011001.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01000000.01011001.00000000
broadcast00001010.01000000.01011001.11111111
green = network part, grey = host part
hex0x0a405900
decimal171989248
reverse dns0.89.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:5900

/24 split into /31 · 128 subnets

close ×
#networkhost rangebroadcast
110.64.89.0/3110.64.89.0 – 10.64.89.110.64.89.1
210.64.89.2/3110.64.89.2 – 10.64.89.310.64.89.3
310.64.89.4/3110.64.89.4 – 10.64.89.510.64.89.5
410.64.89.6/3110.64.89.6 – 10.64.89.710.64.89.7
510.64.89.8/3110.64.89.8 – 10.64.89.910.64.89.9
610.64.89.10/3110.64.89.10 – 10.64.89.1110.64.89.11
710.64.89.12/3110.64.89.12 – 10.64.89.1310.64.89.13
810.64.89.14/3110.64.89.14 – 10.64.89.1510.64.89.15
910.64.89.16/3110.64.89.16 – 10.64.89.1710.64.89.17
1010.64.89.18/3110.64.89.18 – 10.64.89.1910.64.89.19
1110.64.89.20/3110.64.89.20 – 10.64.89.2110.64.89.21
1210.64.89.22/3110.64.89.22 – 10.64.89.2310.64.89.23
1310.64.89.24/3110.64.89.24 – 10.64.89.2510.64.89.25
1410.64.89.26/3110.64.89.26 – 10.64.89.2710.64.89.27
1510.64.89.28/3110.64.89.28 – 10.64.89.2910.64.89.29
1610.64.89.30/3110.64.89.30 – 10.64.89.3110.64.89.31
1710.64.89.32/3110.64.89.32 – 10.64.89.3310.64.89.33
1810.64.89.34/3110.64.89.34 – 10.64.89.3510.64.89.35
1910.64.89.36/3110.64.89.36 – 10.64.89.3710.64.89.37
2010.64.89.38/3110.64.89.38 – 10.64.89.3910.64.89.39
2110.64.89.40/3110.64.89.40 – 10.64.89.4110.64.89.41
2210.64.89.42/3110.64.89.42 – 10.64.89.4310.64.89.43
2310.64.89.44/3110.64.89.44 – 10.64.89.4510.64.89.45
2410.64.89.46/3110.64.89.46 – 10.64.89.4710.64.89.47
2510.64.89.48/3110.64.89.48 – 10.64.89.4910.64.89.49
2610.64.89.50/3110.64.89.50 – 10.64.89.5110.64.89.51
2710.64.89.52/3110.64.89.52 – 10.64.89.5310.64.89.53
2810.64.89.54/3110.64.89.54 – 10.64.89.5510.64.89.55
2910.64.89.56/3110.64.89.56 – 10.64.89.5710.64.89.57
3010.64.89.58/3110.64.89.58 – 10.64.89.5910.64.89.59
3110.64.89.60/3110.64.89.60 – 10.64.89.6110.64.89.61
3210.64.89.62/3110.64.89.62 – 10.64.89.6310.64.89.63
3310.64.89.64/3110.64.89.64 – 10.64.89.6510.64.89.65
3410.64.89.66/3110.64.89.66 – 10.64.89.6710.64.89.67
3510.64.89.68/3110.64.89.68 – 10.64.89.6910.64.89.69
3610.64.89.70/3110.64.89.70 – 10.64.89.7110.64.89.71
3710.64.89.72/3110.64.89.72 – 10.64.89.7310.64.89.73
3810.64.89.74/3110.64.89.74 – 10.64.89.7510.64.89.75
3910.64.89.76/3110.64.89.76 – 10.64.89.7710.64.89.77
4010.64.89.78/3110.64.89.78 – 10.64.89.7910.64.89.79
4110.64.89.80/3110.64.89.80 – 10.64.89.8110.64.89.81
4210.64.89.82/3110.64.89.82 – 10.64.89.8310.64.89.83
4310.64.89.84/3110.64.89.84 – 10.64.89.8510.64.89.85
4410.64.89.86/3110.64.89.86 – 10.64.89.8710.64.89.87
4510.64.89.88/3110.64.89.88 – 10.64.89.8910.64.89.89
4610.64.89.90/3110.64.89.90 – 10.64.89.9110.64.89.91
4710.64.89.92/3110.64.89.92 – 10.64.89.9310.64.89.93
4810.64.89.94/3110.64.89.94 – 10.64.89.9510.64.89.95
4910.64.89.96/3110.64.89.96 – 10.64.89.9710.64.89.97
5010.64.89.98/3110.64.89.98 – 10.64.89.9910.64.89.99
5110.64.89.100/3110.64.89.100 – 10.64.89.10110.64.89.101
5210.64.89.102/3110.64.89.102 – 10.64.89.10310.64.89.103
5310.64.89.104/3110.64.89.104 – 10.64.89.10510.64.89.105
5410.64.89.106/3110.64.89.106 – 10.64.89.10710.64.89.107
5510.64.89.108/3110.64.89.108 – 10.64.89.10910.64.89.109
5610.64.89.110/3110.64.89.110 – 10.64.89.11110.64.89.111
5710.64.89.112/3110.64.89.112 – 10.64.89.11310.64.89.113
5810.64.89.114/3110.64.89.114 – 10.64.89.11510.64.89.115
5910.64.89.116/3110.64.89.116 – 10.64.89.11710.64.89.117
6010.64.89.118/3110.64.89.118 – 10.64.89.11910.64.89.119
6110.64.89.120/3110.64.89.120 – 10.64.89.12110.64.89.121
6210.64.89.122/3110.64.89.122 – 10.64.89.12310.64.89.123
6310.64.89.124/3110.64.89.124 – 10.64.89.12510.64.89.125
6410.64.89.126/3110.64.89.126 – 10.64.89.12710.64.89.127
6510.64.89.128/3110.64.89.128 – 10.64.89.12910.64.89.129
6610.64.89.130/3110.64.89.130 – 10.64.89.13110.64.89.131
6710.64.89.132/3110.64.89.132 – 10.64.89.13310.64.89.133
6810.64.89.134/3110.64.89.134 – 10.64.89.13510.64.89.135
6910.64.89.136/3110.64.89.136 – 10.64.89.13710.64.89.137
7010.64.89.138/3110.64.89.138 – 10.64.89.13910.64.89.139
7110.64.89.140/3110.64.89.140 – 10.64.89.14110.64.89.141
7210.64.89.142/3110.64.89.142 – 10.64.89.14310.64.89.143
7310.64.89.144/3110.64.89.144 – 10.64.89.14510.64.89.145
7410.64.89.146/3110.64.89.146 – 10.64.89.14710.64.89.147
7510.64.89.148/3110.64.89.148 – 10.64.89.14910.64.89.149
7610.64.89.150/3110.64.89.150 – 10.64.89.15110.64.89.151
7710.64.89.152/3110.64.89.152 – 10.64.89.15310.64.89.153
7810.64.89.154/3110.64.89.154 – 10.64.89.15510.64.89.155
7910.64.89.156/3110.64.89.156 – 10.64.89.15710.64.89.157
8010.64.89.158/3110.64.89.158 – 10.64.89.15910.64.89.159
8110.64.89.160/3110.64.89.160 – 10.64.89.16110.64.89.161
8210.64.89.162/3110.64.89.162 – 10.64.89.16310.64.89.163
8310.64.89.164/3110.64.89.164 – 10.64.89.16510.64.89.165
8410.64.89.166/3110.64.89.166 – 10.64.89.16710.64.89.167
8510.64.89.168/3110.64.89.168 – 10.64.89.16910.64.89.169
8610.64.89.170/3110.64.89.170 – 10.64.89.17110.64.89.171
8710.64.89.172/3110.64.89.172 – 10.64.89.17310.64.89.173
8810.64.89.174/3110.64.89.174 – 10.64.89.17510.64.89.175
8910.64.89.176/3110.64.89.176 – 10.64.89.17710.64.89.177
9010.64.89.178/3110.64.89.178 – 10.64.89.17910.64.89.179
9110.64.89.180/3110.64.89.180 – 10.64.89.18110.64.89.181
9210.64.89.182/3110.64.89.182 – 10.64.89.18310.64.89.183
9310.64.89.184/3110.64.89.184 – 10.64.89.18510.64.89.185
9410.64.89.186/3110.64.89.186 – 10.64.89.18710.64.89.187
9510.64.89.188/3110.64.89.188 – 10.64.89.18910.64.89.189
9610.64.89.190/3110.64.89.190 – 10.64.89.19110.64.89.191
9710.64.89.192/3110.64.89.192 – 10.64.89.19310.64.89.193
9810.64.89.194/3110.64.89.194 – 10.64.89.19510.64.89.195
9910.64.89.196/3110.64.89.196 – 10.64.89.19710.64.89.197
10010.64.89.198/3110.64.89.198 – 10.64.89.19910.64.89.199
10110.64.89.200/3110.64.89.200 – 10.64.89.20110.64.89.201
10210.64.89.202/3110.64.89.202 – 10.64.89.20310.64.89.203
10310.64.89.204/3110.64.89.204 – 10.64.89.20510.64.89.205
10410.64.89.206/3110.64.89.206 – 10.64.89.20710.64.89.207
10510.64.89.208/3110.64.89.208 – 10.64.89.20910.64.89.209
10610.64.89.210/3110.64.89.210 – 10.64.89.21110.64.89.211
10710.64.89.212/3110.64.89.212 – 10.64.89.21310.64.89.213
10810.64.89.214/3110.64.89.214 – 10.64.89.21510.64.89.215
10910.64.89.216/3110.64.89.216 – 10.64.89.21710.64.89.217
11010.64.89.218/3110.64.89.218 – 10.64.89.21910.64.89.219
11110.64.89.220/3110.64.89.220 – 10.64.89.22110.64.89.221
11210.64.89.222/3110.64.89.222 – 10.64.89.22310.64.89.223
11310.64.89.224/3110.64.89.224 – 10.64.89.22510.64.89.225
11410.64.89.226/3110.64.89.226 – 10.64.89.22710.64.89.227
11510.64.89.228/3110.64.89.228 – 10.64.89.22910.64.89.229
11610.64.89.230/3110.64.89.230 – 10.64.89.23110.64.89.231
11710.64.89.232/3110.64.89.232 – 10.64.89.23310.64.89.233
11810.64.89.234/3110.64.89.234 – 10.64.89.23510.64.89.235
11910.64.89.236/3110.64.89.236 – 10.64.89.23710.64.89.237
12010.64.89.238/3110.64.89.238 – 10.64.89.23910.64.89.239
12110.64.89.240/3110.64.89.240 – 10.64.89.24110.64.89.241
12210.64.89.242/3110.64.89.242 – 10.64.89.24310.64.89.243
12310.64.89.244/3110.64.89.244 – 10.64.89.24510.64.89.245
12410.64.89.246/3110.64.89.246 – 10.64.89.24710.64.89.247
12510.64.89.248/3110.64.89.248 – 10.64.89.24910.64.89.249
12610.64.89.250/3110.64.89.250 – 10.64.89.25110.64.89.251
12710.64.89.252/3110.64.89.252 – 10.64.89.25310.64.89.253
12810.64.89.254/3110.64.89.254 – 10.64.89.25510.64.89.255
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 →