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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)10.167.196.0/23
network10.167.196.0/23
broadcast10.167.197.255
first host10.167.196.1
last host10.167.197.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.196.0/23
address00001010.10100111.11000100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.11000100.00000000
broadcast00001010.10100111.11000101.11111111
green = network part, grey = host part
hex0x0aa7c400
decimal178766848
reverse dns0.196.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:c400

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.196.0/2910.167.196.1 – 10.167.196.610.167.196.7
210.167.196.8/2910.167.196.9 – 10.167.196.1410.167.196.15
310.167.196.16/2910.167.196.17 – 10.167.196.2210.167.196.23
410.167.196.24/2910.167.196.25 – 10.167.196.3010.167.196.31
510.167.196.32/2910.167.196.33 – 10.167.196.3810.167.196.39
610.167.196.40/2910.167.196.41 – 10.167.196.4610.167.196.47
710.167.196.48/2910.167.196.49 – 10.167.196.5410.167.196.55
810.167.196.56/2910.167.196.57 – 10.167.196.6210.167.196.63
910.167.196.64/2910.167.196.65 – 10.167.196.7010.167.196.71
1010.167.196.72/2910.167.196.73 – 10.167.196.7810.167.196.79
1110.167.196.80/2910.167.196.81 – 10.167.196.8610.167.196.87
1210.167.196.88/2910.167.196.89 – 10.167.196.9410.167.196.95
1310.167.196.96/2910.167.196.97 – 10.167.196.10210.167.196.103
1410.167.196.104/2910.167.196.105 – 10.167.196.11010.167.196.111
1510.167.196.112/2910.167.196.113 – 10.167.196.11810.167.196.119
1610.167.196.120/2910.167.196.121 – 10.167.196.12610.167.196.127
1710.167.196.128/2910.167.196.129 – 10.167.196.13410.167.196.135
1810.167.196.136/2910.167.196.137 – 10.167.196.14210.167.196.143
1910.167.196.144/2910.167.196.145 – 10.167.196.15010.167.196.151
2010.167.196.152/2910.167.196.153 – 10.167.196.15810.167.196.159
2110.167.196.160/2910.167.196.161 – 10.167.196.16610.167.196.167
2210.167.196.168/2910.167.196.169 – 10.167.196.17410.167.196.175
2310.167.196.176/2910.167.196.177 – 10.167.196.18210.167.196.183
2410.167.196.184/2910.167.196.185 – 10.167.196.19010.167.196.191
2510.167.196.192/2910.167.196.193 – 10.167.196.19810.167.196.199
2610.167.196.200/2910.167.196.201 – 10.167.196.20610.167.196.207
2710.167.196.208/2910.167.196.209 – 10.167.196.21410.167.196.215
2810.167.196.216/2910.167.196.217 – 10.167.196.22210.167.196.223
2910.167.196.224/2910.167.196.225 – 10.167.196.23010.167.196.231
3010.167.196.232/2910.167.196.233 – 10.167.196.23810.167.196.239
3110.167.196.240/2910.167.196.241 – 10.167.196.24610.167.196.247
3210.167.196.248/2910.167.196.249 – 10.167.196.25410.167.196.255
3310.167.197.0/2910.167.197.1 – 10.167.197.610.167.197.7
3410.167.197.8/2910.167.197.9 – 10.167.197.1410.167.197.15
3510.167.197.16/2910.167.197.17 – 10.167.197.2210.167.197.23
3610.167.197.24/2910.167.197.25 – 10.167.197.3010.167.197.31
3710.167.197.32/2910.167.197.33 – 10.167.197.3810.167.197.39
3810.167.197.40/2910.167.197.41 – 10.167.197.4610.167.197.47
3910.167.197.48/2910.167.197.49 – 10.167.197.5410.167.197.55
4010.167.197.56/2910.167.197.57 – 10.167.197.6210.167.197.63
4110.167.197.64/2910.167.197.65 – 10.167.197.7010.167.197.71
4210.167.197.72/2910.167.197.73 – 10.167.197.7810.167.197.79
4310.167.197.80/2910.167.197.81 – 10.167.197.8610.167.197.87
4410.167.197.88/2910.167.197.89 – 10.167.197.9410.167.197.95
4510.167.197.96/2910.167.197.97 – 10.167.197.10210.167.197.103
4610.167.197.104/2910.167.197.105 – 10.167.197.11010.167.197.111
4710.167.197.112/2910.167.197.113 – 10.167.197.11810.167.197.119
4810.167.197.120/2910.167.197.121 – 10.167.197.12610.167.197.127
4910.167.197.128/2910.167.197.129 – 10.167.197.13410.167.197.135
5010.167.197.136/2910.167.197.137 – 10.167.197.14210.167.197.143
5110.167.197.144/2910.167.197.145 – 10.167.197.15010.167.197.151
5210.167.197.152/2910.167.197.153 – 10.167.197.15810.167.197.159
5310.167.197.160/2910.167.197.161 – 10.167.197.16610.167.197.167
5410.167.197.168/2910.167.197.169 – 10.167.197.17410.167.197.175
5510.167.197.176/2910.167.197.177 – 10.167.197.18210.167.197.183
5610.167.197.184/2910.167.197.185 – 10.167.197.19010.167.197.191
5710.167.197.192/2910.167.197.193 – 10.167.197.19810.167.197.199
5810.167.197.200/2910.167.197.201 – 10.167.197.20610.167.197.207
5910.167.197.208/2910.167.197.209 – 10.167.197.21410.167.197.215
6010.167.197.216/2910.167.197.217 – 10.167.197.22210.167.197.223
6110.167.197.224/2910.167.197.225 – 10.167.197.23010.167.197.231
6210.167.197.232/2910.167.197.233 – 10.167.197.23810.167.197.239
6310.167.197.240/2910.167.197.241 – 10.167.197.24610.167.197.247
6410.167.197.248/2910.167.197.249 – 10.167.197.25410.167.197.255
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 →