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)10.205.74.0/23
network10.205.74.0/23
broadcast10.205.75.255
first host10.205.74.1
last host10.205.75.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.205.74.0/23
address00001010.11001101.01001010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.11001101.01001010.00000000
broadcast00001010.11001101.01001011.11111111
green = network part, grey = host part
hex0x0acd4a00
decimal181225984
reverse dns0.74.205.10.in-addr.arpa
ipv4-mapped::ffff:acd:4a00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.205.74.0/3010.205.74.1 – 10.205.74.210.205.74.3
210.205.74.4/3010.205.74.5 – 10.205.74.610.205.74.7
310.205.74.8/3010.205.74.9 – 10.205.74.1010.205.74.11
410.205.74.12/3010.205.74.13 – 10.205.74.1410.205.74.15
510.205.74.16/3010.205.74.17 – 10.205.74.1810.205.74.19
610.205.74.20/3010.205.74.21 – 10.205.74.2210.205.74.23
710.205.74.24/3010.205.74.25 – 10.205.74.2610.205.74.27
810.205.74.28/3010.205.74.29 – 10.205.74.3010.205.74.31
910.205.74.32/3010.205.74.33 – 10.205.74.3410.205.74.35
1010.205.74.36/3010.205.74.37 – 10.205.74.3810.205.74.39
1110.205.74.40/3010.205.74.41 – 10.205.74.4210.205.74.43
1210.205.74.44/3010.205.74.45 – 10.205.74.4610.205.74.47
1310.205.74.48/3010.205.74.49 – 10.205.74.5010.205.74.51
1410.205.74.52/3010.205.74.53 – 10.205.74.5410.205.74.55
1510.205.74.56/3010.205.74.57 – 10.205.74.5810.205.74.59
1610.205.74.60/3010.205.74.61 – 10.205.74.6210.205.74.63
1710.205.74.64/3010.205.74.65 – 10.205.74.6610.205.74.67
1810.205.74.68/3010.205.74.69 – 10.205.74.7010.205.74.71
1910.205.74.72/3010.205.74.73 – 10.205.74.7410.205.74.75
2010.205.74.76/3010.205.74.77 – 10.205.74.7810.205.74.79
2110.205.74.80/3010.205.74.81 – 10.205.74.8210.205.74.83
2210.205.74.84/3010.205.74.85 – 10.205.74.8610.205.74.87
2310.205.74.88/3010.205.74.89 – 10.205.74.9010.205.74.91
2410.205.74.92/3010.205.74.93 – 10.205.74.9410.205.74.95
2510.205.74.96/3010.205.74.97 – 10.205.74.9810.205.74.99
2610.205.74.100/3010.205.74.101 – 10.205.74.10210.205.74.103
2710.205.74.104/3010.205.74.105 – 10.205.74.10610.205.74.107
2810.205.74.108/3010.205.74.109 – 10.205.74.11010.205.74.111
2910.205.74.112/3010.205.74.113 – 10.205.74.11410.205.74.115
3010.205.74.116/3010.205.74.117 – 10.205.74.11810.205.74.119
3110.205.74.120/3010.205.74.121 – 10.205.74.12210.205.74.123
3210.205.74.124/3010.205.74.125 – 10.205.74.12610.205.74.127
3310.205.74.128/3010.205.74.129 – 10.205.74.13010.205.74.131
3410.205.74.132/3010.205.74.133 – 10.205.74.13410.205.74.135
3510.205.74.136/3010.205.74.137 – 10.205.74.13810.205.74.139
3610.205.74.140/3010.205.74.141 – 10.205.74.14210.205.74.143
3710.205.74.144/3010.205.74.145 – 10.205.74.14610.205.74.147
3810.205.74.148/3010.205.74.149 – 10.205.74.15010.205.74.151
3910.205.74.152/3010.205.74.153 – 10.205.74.15410.205.74.155
4010.205.74.156/3010.205.74.157 – 10.205.74.15810.205.74.159
4110.205.74.160/3010.205.74.161 – 10.205.74.16210.205.74.163
4210.205.74.164/3010.205.74.165 – 10.205.74.16610.205.74.167
4310.205.74.168/3010.205.74.169 – 10.205.74.17010.205.74.171
4410.205.74.172/3010.205.74.173 – 10.205.74.17410.205.74.175
4510.205.74.176/3010.205.74.177 – 10.205.74.17810.205.74.179
4610.205.74.180/3010.205.74.181 – 10.205.74.18210.205.74.183
4710.205.74.184/3010.205.74.185 – 10.205.74.18610.205.74.187
4810.205.74.188/3010.205.74.189 – 10.205.74.19010.205.74.191
4910.205.74.192/3010.205.74.193 – 10.205.74.19410.205.74.195
5010.205.74.196/3010.205.74.197 – 10.205.74.19810.205.74.199
5110.205.74.200/3010.205.74.201 – 10.205.74.20210.205.74.203
5210.205.74.204/3010.205.74.205 – 10.205.74.20610.205.74.207
5310.205.74.208/3010.205.74.209 – 10.205.74.21010.205.74.211
5410.205.74.212/3010.205.74.213 – 10.205.74.21410.205.74.215
5510.205.74.216/3010.205.74.217 – 10.205.74.21810.205.74.219
5610.205.74.220/3010.205.74.221 – 10.205.74.22210.205.74.223
5710.205.74.224/3010.205.74.225 – 10.205.74.22610.205.74.227
5810.205.74.228/3010.205.74.229 – 10.205.74.23010.205.74.231
5910.205.74.232/3010.205.74.233 – 10.205.74.23410.205.74.235
6010.205.74.236/3010.205.74.237 – 10.205.74.23810.205.74.239
6110.205.74.240/3010.205.74.241 – 10.205.74.24210.205.74.243
6210.205.74.244/3010.205.74.245 – 10.205.74.24610.205.74.247
6310.205.74.248/3010.205.74.249 – 10.205.74.25010.205.74.251
6410.205.74.252/3010.205.74.253 – 10.205.74.25410.205.74.255
6510.205.75.0/3010.205.75.1 – 10.205.75.210.205.75.3
6610.205.75.4/3010.205.75.5 – 10.205.75.610.205.75.7
6710.205.75.8/3010.205.75.9 – 10.205.75.1010.205.75.11
6810.205.75.12/3010.205.75.13 – 10.205.75.1410.205.75.15
6910.205.75.16/3010.205.75.17 – 10.205.75.1810.205.75.19
7010.205.75.20/3010.205.75.21 – 10.205.75.2210.205.75.23
7110.205.75.24/3010.205.75.25 – 10.205.75.2610.205.75.27
7210.205.75.28/3010.205.75.29 – 10.205.75.3010.205.75.31
7310.205.75.32/3010.205.75.33 – 10.205.75.3410.205.75.35
7410.205.75.36/3010.205.75.37 – 10.205.75.3810.205.75.39
7510.205.75.40/3010.205.75.41 – 10.205.75.4210.205.75.43
7610.205.75.44/3010.205.75.45 – 10.205.75.4610.205.75.47
7710.205.75.48/3010.205.75.49 – 10.205.75.5010.205.75.51
7810.205.75.52/3010.205.75.53 – 10.205.75.5410.205.75.55
7910.205.75.56/3010.205.75.57 – 10.205.75.5810.205.75.59
8010.205.75.60/3010.205.75.61 – 10.205.75.6210.205.75.63
8110.205.75.64/3010.205.75.65 – 10.205.75.6610.205.75.67
8210.205.75.68/3010.205.75.69 – 10.205.75.7010.205.75.71
8310.205.75.72/3010.205.75.73 – 10.205.75.7410.205.75.75
8410.205.75.76/3010.205.75.77 – 10.205.75.7810.205.75.79
8510.205.75.80/3010.205.75.81 – 10.205.75.8210.205.75.83
8610.205.75.84/3010.205.75.85 – 10.205.75.8610.205.75.87
8710.205.75.88/3010.205.75.89 – 10.205.75.9010.205.75.91
8810.205.75.92/3010.205.75.93 – 10.205.75.9410.205.75.95
8910.205.75.96/3010.205.75.97 – 10.205.75.9810.205.75.99
9010.205.75.100/3010.205.75.101 – 10.205.75.10210.205.75.103
9110.205.75.104/3010.205.75.105 – 10.205.75.10610.205.75.107
9210.205.75.108/3010.205.75.109 – 10.205.75.11010.205.75.111
9310.205.75.112/3010.205.75.113 – 10.205.75.11410.205.75.115
9410.205.75.116/3010.205.75.117 – 10.205.75.11810.205.75.119
9510.205.75.120/3010.205.75.121 – 10.205.75.12210.205.75.123
9610.205.75.124/3010.205.75.125 – 10.205.75.12610.205.75.127
9710.205.75.128/3010.205.75.129 – 10.205.75.13010.205.75.131
9810.205.75.132/3010.205.75.133 – 10.205.75.13410.205.75.135
9910.205.75.136/3010.205.75.137 – 10.205.75.13810.205.75.139
10010.205.75.140/3010.205.75.141 – 10.205.75.14210.205.75.143
10110.205.75.144/3010.205.75.145 – 10.205.75.14610.205.75.147
10210.205.75.148/3010.205.75.149 – 10.205.75.15010.205.75.151
10310.205.75.152/3010.205.75.153 – 10.205.75.15410.205.75.155
10410.205.75.156/3010.205.75.157 – 10.205.75.15810.205.75.159
10510.205.75.160/3010.205.75.161 – 10.205.75.16210.205.75.163
10610.205.75.164/3010.205.75.165 – 10.205.75.16610.205.75.167
10710.205.75.168/3010.205.75.169 – 10.205.75.17010.205.75.171
10810.205.75.172/3010.205.75.173 – 10.205.75.17410.205.75.175
10910.205.75.176/3010.205.75.177 – 10.205.75.17810.205.75.179
11010.205.75.180/3010.205.75.181 – 10.205.75.18210.205.75.183
11110.205.75.184/3010.205.75.185 – 10.205.75.18610.205.75.187
11210.205.75.188/3010.205.75.189 – 10.205.75.19010.205.75.191
11310.205.75.192/3010.205.75.193 – 10.205.75.19410.205.75.195
11410.205.75.196/3010.205.75.197 – 10.205.75.19810.205.75.199
11510.205.75.200/3010.205.75.201 – 10.205.75.20210.205.75.203
11610.205.75.204/3010.205.75.205 – 10.205.75.20610.205.75.207
11710.205.75.208/3010.205.75.209 – 10.205.75.21010.205.75.211
11810.205.75.212/3010.205.75.213 – 10.205.75.21410.205.75.215
11910.205.75.216/3010.205.75.217 – 10.205.75.21810.205.75.219
12010.205.75.220/3010.205.75.221 – 10.205.75.22210.205.75.223
12110.205.75.224/3010.205.75.225 – 10.205.75.22610.205.75.227
12210.205.75.228/3010.205.75.229 – 10.205.75.23010.205.75.231
12310.205.75.232/3010.205.75.233 – 10.205.75.23410.205.75.235
12410.205.75.236/3010.205.75.237 – 10.205.75.23810.205.75.239
12510.205.75.240/3010.205.75.241 – 10.205.75.24210.205.75.243
12610.205.75.244/3010.205.75.245 – 10.205.75.24610.205.75.247
12710.205.75.248/3010.205.75.249 – 10.205.75.25010.205.75.251
12810.205.75.252/3010.205.75.253 – 10.205.75.25410.205.75.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /23
/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-
/23255.255.254.05125101
/24255.255.255.02562542 split →
/25255.255.255.1281281264 split →
/26255.255.255.19264628 split →
/27255.255.255.224323016 split →
/28255.255.255.240161432 split →
/29255.255.255.2488664 split →
/30255.255.255.25242128 split →
/31255.255.255.25422256 split →
/32255.255.255.25511512 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 →