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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)10.3.62.0/23
network10.3.62.0/23
broadcast10.3.63.255
first host10.3.62.1
last host10.3.63.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.3.62.0/23
address00001010.00000011.00111110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000011.00111110.00000000
broadcast00001010.00000011.00111111.11111111
green = network part, grey = host part
hex0x0a033e00
decimal167984640
reverse dns0.62.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:3e00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.62.0/2910.3.62.1 – 10.3.62.610.3.62.7
210.3.62.8/2910.3.62.9 – 10.3.62.1410.3.62.15
310.3.62.16/2910.3.62.17 – 10.3.62.2210.3.62.23
410.3.62.24/2910.3.62.25 – 10.3.62.3010.3.62.31
510.3.62.32/2910.3.62.33 – 10.3.62.3810.3.62.39
610.3.62.40/2910.3.62.41 – 10.3.62.4610.3.62.47
710.3.62.48/2910.3.62.49 – 10.3.62.5410.3.62.55
810.3.62.56/2910.3.62.57 – 10.3.62.6210.3.62.63
910.3.62.64/2910.3.62.65 – 10.3.62.7010.3.62.71
1010.3.62.72/2910.3.62.73 – 10.3.62.7810.3.62.79
1110.3.62.80/2910.3.62.81 – 10.3.62.8610.3.62.87
1210.3.62.88/2910.3.62.89 – 10.3.62.9410.3.62.95
1310.3.62.96/2910.3.62.97 – 10.3.62.10210.3.62.103
1410.3.62.104/2910.3.62.105 – 10.3.62.11010.3.62.111
1510.3.62.112/2910.3.62.113 – 10.3.62.11810.3.62.119
1610.3.62.120/2910.3.62.121 – 10.3.62.12610.3.62.127
1710.3.62.128/2910.3.62.129 – 10.3.62.13410.3.62.135
1810.3.62.136/2910.3.62.137 – 10.3.62.14210.3.62.143
1910.3.62.144/2910.3.62.145 – 10.3.62.15010.3.62.151
2010.3.62.152/2910.3.62.153 – 10.3.62.15810.3.62.159
2110.3.62.160/2910.3.62.161 – 10.3.62.16610.3.62.167
2210.3.62.168/2910.3.62.169 – 10.3.62.17410.3.62.175
2310.3.62.176/2910.3.62.177 – 10.3.62.18210.3.62.183
2410.3.62.184/2910.3.62.185 – 10.3.62.19010.3.62.191
2510.3.62.192/2910.3.62.193 – 10.3.62.19810.3.62.199
2610.3.62.200/2910.3.62.201 – 10.3.62.20610.3.62.207
2710.3.62.208/2910.3.62.209 – 10.3.62.21410.3.62.215
2810.3.62.216/2910.3.62.217 – 10.3.62.22210.3.62.223
2910.3.62.224/2910.3.62.225 – 10.3.62.23010.3.62.231
3010.3.62.232/2910.3.62.233 – 10.3.62.23810.3.62.239
3110.3.62.240/2910.3.62.241 – 10.3.62.24610.3.62.247
3210.3.62.248/2910.3.62.249 – 10.3.62.25410.3.62.255
3310.3.63.0/2910.3.63.1 – 10.3.63.610.3.63.7
3410.3.63.8/2910.3.63.9 – 10.3.63.1410.3.63.15
3510.3.63.16/2910.3.63.17 – 10.3.63.2210.3.63.23
3610.3.63.24/2910.3.63.25 – 10.3.63.3010.3.63.31
3710.3.63.32/2910.3.63.33 – 10.3.63.3810.3.63.39
3810.3.63.40/2910.3.63.41 – 10.3.63.4610.3.63.47
3910.3.63.48/2910.3.63.49 – 10.3.63.5410.3.63.55
4010.3.63.56/2910.3.63.57 – 10.3.63.6210.3.63.63
4110.3.63.64/2910.3.63.65 – 10.3.63.7010.3.63.71
4210.3.63.72/2910.3.63.73 – 10.3.63.7810.3.63.79
4310.3.63.80/2910.3.63.81 – 10.3.63.8610.3.63.87
4410.3.63.88/2910.3.63.89 – 10.3.63.9410.3.63.95
4510.3.63.96/2910.3.63.97 – 10.3.63.10210.3.63.103
4610.3.63.104/2910.3.63.105 – 10.3.63.11010.3.63.111
4710.3.63.112/2910.3.63.113 – 10.3.63.11810.3.63.119
4810.3.63.120/2910.3.63.121 – 10.3.63.12610.3.63.127
4910.3.63.128/2910.3.63.129 – 10.3.63.13410.3.63.135
5010.3.63.136/2910.3.63.137 – 10.3.63.14210.3.63.143
5110.3.63.144/2910.3.63.145 – 10.3.63.15010.3.63.151
5210.3.63.152/2910.3.63.153 – 10.3.63.15810.3.63.159
5310.3.63.160/2910.3.63.161 – 10.3.63.16610.3.63.167
5410.3.63.168/2910.3.63.169 – 10.3.63.17410.3.63.175
5510.3.63.176/2910.3.63.177 – 10.3.63.18210.3.63.183
5610.3.63.184/2910.3.63.185 – 10.3.63.19010.3.63.191
5710.3.63.192/2910.3.63.193 – 10.3.63.19810.3.63.199
5810.3.63.200/2910.3.63.201 – 10.3.63.20610.3.63.207
5910.3.63.208/2910.3.63.209 – 10.3.63.21410.3.63.215
6010.3.63.216/2910.3.63.217 – 10.3.63.22210.3.63.223
6110.3.63.224/2910.3.63.225 – 10.3.63.23010.3.63.231
6210.3.63.232/2910.3.63.233 – 10.3.63.23810.3.63.239
6310.3.63.240/2910.3.63.241 – 10.3.63.24610.3.63.247
6410.3.63.248/2910.3.63.249 – 10.3.63.25410.3.63.255
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 →