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)10.4.202.0/23
network10.4.202.0/23
broadcast10.4.203.255
first host10.4.202.1
last host10.4.203.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.4.202.0/23
address00001010.00000100.11001010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000100.11001010.00000000
broadcast00001010.00000100.11001011.11111111
green = network part, grey = host part
hex0x0a04ca00
decimal168086016
reverse dns0.202.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:ca00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.4.202.0/3010.4.202.1 – 10.4.202.210.4.202.3
210.4.202.4/3010.4.202.5 – 10.4.202.610.4.202.7
310.4.202.8/3010.4.202.9 – 10.4.202.1010.4.202.11
410.4.202.12/3010.4.202.13 – 10.4.202.1410.4.202.15
510.4.202.16/3010.4.202.17 – 10.4.202.1810.4.202.19
610.4.202.20/3010.4.202.21 – 10.4.202.2210.4.202.23
710.4.202.24/3010.4.202.25 – 10.4.202.2610.4.202.27
810.4.202.28/3010.4.202.29 – 10.4.202.3010.4.202.31
910.4.202.32/3010.4.202.33 – 10.4.202.3410.4.202.35
1010.4.202.36/3010.4.202.37 – 10.4.202.3810.4.202.39
1110.4.202.40/3010.4.202.41 – 10.4.202.4210.4.202.43
1210.4.202.44/3010.4.202.45 – 10.4.202.4610.4.202.47
1310.4.202.48/3010.4.202.49 – 10.4.202.5010.4.202.51
1410.4.202.52/3010.4.202.53 – 10.4.202.5410.4.202.55
1510.4.202.56/3010.4.202.57 – 10.4.202.5810.4.202.59
1610.4.202.60/3010.4.202.61 – 10.4.202.6210.4.202.63
1710.4.202.64/3010.4.202.65 – 10.4.202.6610.4.202.67
1810.4.202.68/3010.4.202.69 – 10.4.202.7010.4.202.71
1910.4.202.72/3010.4.202.73 – 10.4.202.7410.4.202.75
2010.4.202.76/3010.4.202.77 – 10.4.202.7810.4.202.79
2110.4.202.80/3010.4.202.81 – 10.4.202.8210.4.202.83
2210.4.202.84/3010.4.202.85 – 10.4.202.8610.4.202.87
2310.4.202.88/3010.4.202.89 – 10.4.202.9010.4.202.91
2410.4.202.92/3010.4.202.93 – 10.4.202.9410.4.202.95
2510.4.202.96/3010.4.202.97 – 10.4.202.9810.4.202.99
2610.4.202.100/3010.4.202.101 – 10.4.202.10210.4.202.103
2710.4.202.104/3010.4.202.105 – 10.4.202.10610.4.202.107
2810.4.202.108/3010.4.202.109 – 10.4.202.11010.4.202.111
2910.4.202.112/3010.4.202.113 – 10.4.202.11410.4.202.115
3010.4.202.116/3010.4.202.117 – 10.4.202.11810.4.202.119
3110.4.202.120/3010.4.202.121 – 10.4.202.12210.4.202.123
3210.4.202.124/3010.4.202.125 – 10.4.202.12610.4.202.127
3310.4.202.128/3010.4.202.129 – 10.4.202.13010.4.202.131
3410.4.202.132/3010.4.202.133 – 10.4.202.13410.4.202.135
3510.4.202.136/3010.4.202.137 – 10.4.202.13810.4.202.139
3610.4.202.140/3010.4.202.141 – 10.4.202.14210.4.202.143
3710.4.202.144/3010.4.202.145 – 10.4.202.14610.4.202.147
3810.4.202.148/3010.4.202.149 – 10.4.202.15010.4.202.151
3910.4.202.152/3010.4.202.153 – 10.4.202.15410.4.202.155
4010.4.202.156/3010.4.202.157 – 10.4.202.15810.4.202.159
4110.4.202.160/3010.4.202.161 – 10.4.202.16210.4.202.163
4210.4.202.164/3010.4.202.165 – 10.4.202.16610.4.202.167
4310.4.202.168/3010.4.202.169 – 10.4.202.17010.4.202.171
4410.4.202.172/3010.4.202.173 – 10.4.202.17410.4.202.175
4510.4.202.176/3010.4.202.177 – 10.4.202.17810.4.202.179
4610.4.202.180/3010.4.202.181 – 10.4.202.18210.4.202.183
4710.4.202.184/3010.4.202.185 – 10.4.202.18610.4.202.187
4810.4.202.188/3010.4.202.189 – 10.4.202.19010.4.202.191
4910.4.202.192/3010.4.202.193 – 10.4.202.19410.4.202.195
5010.4.202.196/3010.4.202.197 – 10.4.202.19810.4.202.199
5110.4.202.200/3010.4.202.201 – 10.4.202.20210.4.202.203
5210.4.202.204/3010.4.202.205 – 10.4.202.20610.4.202.207
5310.4.202.208/3010.4.202.209 – 10.4.202.21010.4.202.211
5410.4.202.212/3010.4.202.213 – 10.4.202.21410.4.202.215
5510.4.202.216/3010.4.202.217 – 10.4.202.21810.4.202.219
5610.4.202.220/3010.4.202.221 – 10.4.202.22210.4.202.223
5710.4.202.224/3010.4.202.225 – 10.4.202.22610.4.202.227
5810.4.202.228/3010.4.202.229 – 10.4.202.23010.4.202.231
5910.4.202.232/3010.4.202.233 – 10.4.202.23410.4.202.235
6010.4.202.236/3010.4.202.237 – 10.4.202.23810.4.202.239
6110.4.202.240/3010.4.202.241 – 10.4.202.24210.4.202.243
6210.4.202.244/3010.4.202.245 – 10.4.202.24610.4.202.247
6310.4.202.248/3010.4.202.249 – 10.4.202.25010.4.202.251
6410.4.202.252/3010.4.202.253 – 10.4.202.25410.4.202.255
6510.4.203.0/3010.4.203.1 – 10.4.203.210.4.203.3
6610.4.203.4/3010.4.203.5 – 10.4.203.610.4.203.7
6710.4.203.8/3010.4.203.9 – 10.4.203.1010.4.203.11
6810.4.203.12/3010.4.203.13 – 10.4.203.1410.4.203.15
6910.4.203.16/3010.4.203.17 – 10.4.203.1810.4.203.19
7010.4.203.20/3010.4.203.21 – 10.4.203.2210.4.203.23
7110.4.203.24/3010.4.203.25 – 10.4.203.2610.4.203.27
7210.4.203.28/3010.4.203.29 – 10.4.203.3010.4.203.31
7310.4.203.32/3010.4.203.33 – 10.4.203.3410.4.203.35
7410.4.203.36/3010.4.203.37 – 10.4.203.3810.4.203.39
7510.4.203.40/3010.4.203.41 – 10.4.203.4210.4.203.43
7610.4.203.44/3010.4.203.45 – 10.4.203.4610.4.203.47
7710.4.203.48/3010.4.203.49 – 10.4.203.5010.4.203.51
7810.4.203.52/3010.4.203.53 – 10.4.203.5410.4.203.55
7910.4.203.56/3010.4.203.57 – 10.4.203.5810.4.203.59
8010.4.203.60/3010.4.203.61 – 10.4.203.6210.4.203.63
8110.4.203.64/3010.4.203.65 – 10.4.203.6610.4.203.67
8210.4.203.68/3010.4.203.69 – 10.4.203.7010.4.203.71
8310.4.203.72/3010.4.203.73 – 10.4.203.7410.4.203.75
8410.4.203.76/3010.4.203.77 – 10.4.203.7810.4.203.79
8510.4.203.80/3010.4.203.81 – 10.4.203.8210.4.203.83
8610.4.203.84/3010.4.203.85 – 10.4.203.8610.4.203.87
8710.4.203.88/3010.4.203.89 – 10.4.203.9010.4.203.91
8810.4.203.92/3010.4.203.93 – 10.4.203.9410.4.203.95
8910.4.203.96/3010.4.203.97 – 10.4.203.9810.4.203.99
9010.4.203.100/3010.4.203.101 – 10.4.203.10210.4.203.103
9110.4.203.104/3010.4.203.105 – 10.4.203.10610.4.203.107
9210.4.203.108/3010.4.203.109 – 10.4.203.11010.4.203.111
9310.4.203.112/3010.4.203.113 – 10.4.203.11410.4.203.115
9410.4.203.116/3010.4.203.117 – 10.4.203.11810.4.203.119
9510.4.203.120/3010.4.203.121 – 10.4.203.12210.4.203.123
9610.4.203.124/3010.4.203.125 – 10.4.203.12610.4.203.127
9710.4.203.128/3010.4.203.129 – 10.4.203.13010.4.203.131
9810.4.203.132/3010.4.203.133 – 10.4.203.13410.4.203.135
9910.4.203.136/3010.4.203.137 – 10.4.203.13810.4.203.139
10010.4.203.140/3010.4.203.141 – 10.4.203.14210.4.203.143
10110.4.203.144/3010.4.203.145 – 10.4.203.14610.4.203.147
10210.4.203.148/3010.4.203.149 – 10.4.203.15010.4.203.151
10310.4.203.152/3010.4.203.153 – 10.4.203.15410.4.203.155
10410.4.203.156/3010.4.203.157 – 10.4.203.15810.4.203.159
10510.4.203.160/3010.4.203.161 – 10.4.203.16210.4.203.163
10610.4.203.164/3010.4.203.165 – 10.4.203.16610.4.203.167
10710.4.203.168/3010.4.203.169 – 10.4.203.17010.4.203.171
10810.4.203.172/3010.4.203.173 – 10.4.203.17410.4.203.175
10910.4.203.176/3010.4.203.177 – 10.4.203.17810.4.203.179
11010.4.203.180/3010.4.203.181 – 10.4.203.18210.4.203.183
11110.4.203.184/3010.4.203.185 – 10.4.203.18610.4.203.187
11210.4.203.188/3010.4.203.189 – 10.4.203.19010.4.203.191
11310.4.203.192/3010.4.203.193 – 10.4.203.19410.4.203.195
11410.4.203.196/3010.4.203.197 – 10.4.203.19810.4.203.199
11510.4.203.200/3010.4.203.201 – 10.4.203.20210.4.203.203
11610.4.203.204/3010.4.203.205 – 10.4.203.20610.4.203.207
11710.4.203.208/3010.4.203.209 – 10.4.203.21010.4.203.211
11810.4.203.212/3010.4.203.213 – 10.4.203.21410.4.203.215
11910.4.203.216/3010.4.203.217 – 10.4.203.21810.4.203.219
12010.4.203.220/3010.4.203.221 – 10.4.203.22210.4.203.223
12110.4.203.224/3010.4.203.225 – 10.4.203.22610.4.203.227
12210.4.203.228/3010.4.203.229 – 10.4.203.23010.4.203.231
12310.4.203.232/3010.4.203.233 – 10.4.203.23410.4.203.235
12410.4.203.236/3010.4.203.237 – 10.4.203.23810.4.203.239
12510.4.203.240/3010.4.203.241 – 10.4.203.24210.4.203.243
12610.4.203.244/3010.4.203.245 – 10.4.203.24610.4.203.247
12710.4.203.248/3010.4.203.249 – 10.4.203.25010.4.203.251
12810.4.203.252/3010.4.203.253 – 10.4.203.25410.4.203.255
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 →