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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)10.167.228.0/23
network10.167.228.0/23
broadcast10.167.229.255
first host10.167.228.1
last host10.167.229.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.228.0/23
address00001010.10100111.11100100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.11100100.00000000
broadcast00001010.10100111.11100101.11111111
green = network part, grey = host part
hex0x0aa7e400
decimal178775040
reverse dns0.228.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:e400

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.228.0/2910.167.228.1 – 10.167.228.610.167.228.7
210.167.228.8/2910.167.228.9 – 10.167.228.1410.167.228.15
310.167.228.16/2910.167.228.17 – 10.167.228.2210.167.228.23
410.167.228.24/2910.167.228.25 – 10.167.228.3010.167.228.31
510.167.228.32/2910.167.228.33 – 10.167.228.3810.167.228.39
610.167.228.40/2910.167.228.41 – 10.167.228.4610.167.228.47
710.167.228.48/2910.167.228.49 – 10.167.228.5410.167.228.55
810.167.228.56/2910.167.228.57 – 10.167.228.6210.167.228.63
910.167.228.64/2910.167.228.65 – 10.167.228.7010.167.228.71
1010.167.228.72/2910.167.228.73 – 10.167.228.7810.167.228.79
1110.167.228.80/2910.167.228.81 – 10.167.228.8610.167.228.87
1210.167.228.88/2910.167.228.89 – 10.167.228.9410.167.228.95
1310.167.228.96/2910.167.228.97 – 10.167.228.10210.167.228.103
1410.167.228.104/2910.167.228.105 – 10.167.228.11010.167.228.111
1510.167.228.112/2910.167.228.113 – 10.167.228.11810.167.228.119
1610.167.228.120/2910.167.228.121 – 10.167.228.12610.167.228.127
1710.167.228.128/2910.167.228.129 – 10.167.228.13410.167.228.135
1810.167.228.136/2910.167.228.137 – 10.167.228.14210.167.228.143
1910.167.228.144/2910.167.228.145 – 10.167.228.15010.167.228.151
2010.167.228.152/2910.167.228.153 – 10.167.228.15810.167.228.159
2110.167.228.160/2910.167.228.161 – 10.167.228.16610.167.228.167
2210.167.228.168/2910.167.228.169 – 10.167.228.17410.167.228.175
2310.167.228.176/2910.167.228.177 – 10.167.228.18210.167.228.183
2410.167.228.184/2910.167.228.185 – 10.167.228.19010.167.228.191
2510.167.228.192/2910.167.228.193 – 10.167.228.19810.167.228.199
2610.167.228.200/2910.167.228.201 – 10.167.228.20610.167.228.207
2710.167.228.208/2910.167.228.209 – 10.167.228.21410.167.228.215
2810.167.228.216/2910.167.228.217 – 10.167.228.22210.167.228.223
2910.167.228.224/2910.167.228.225 – 10.167.228.23010.167.228.231
3010.167.228.232/2910.167.228.233 – 10.167.228.23810.167.228.239
3110.167.228.240/2910.167.228.241 – 10.167.228.24610.167.228.247
3210.167.228.248/2910.167.228.249 – 10.167.228.25410.167.228.255
3310.167.229.0/2910.167.229.1 – 10.167.229.610.167.229.7
3410.167.229.8/2910.167.229.9 – 10.167.229.1410.167.229.15
3510.167.229.16/2910.167.229.17 – 10.167.229.2210.167.229.23
3610.167.229.24/2910.167.229.25 – 10.167.229.3010.167.229.31
3710.167.229.32/2910.167.229.33 – 10.167.229.3810.167.229.39
3810.167.229.40/2910.167.229.41 – 10.167.229.4610.167.229.47
3910.167.229.48/2910.167.229.49 – 10.167.229.5410.167.229.55
4010.167.229.56/2910.167.229.57 – 10.167.229.6210.167.229.63
4110.167.229.64/2910.167.229.65 – 10.167.229.7010.167.229.71
4210.167.229.72/2910.167.229.73 – 10.167.229.7810.167.229.79
4310.167.229.80/2910.167.229.81 – 10.167.229.8610.167.229.87
4410.167.229.88/2910.167.229.89 – 10.167.229.9410.167.229.95
4510.167.229.96/2910.167.229.97 – 10.167.229.10210.167.229.103
4610.167.229.104/2910.167.229.105 – 10.167.229.11010.167.229.111
4710.167.229.112/2910.167.229.113 – 10.167.229.11810.167.229.119
4810.167.229.120/2910.167.229.121 – 10.167.229.12610.167.229.127
4910.167.229.128/2910.167.229.129 – 10.167.229.13410.167.229.135
5010.167.229.136/2910.167.229.137 – 10.167.229.14210.167.229.143
5110.167.229.144/2910.167.229.145 – 10.167.229.15010.167.229.151
5210.167.229.152/2910.167.229.153 – 10.167.229.15810.167.229.159
5310.167.229.160/2910.167.229.161 – 10.167.229.16610.167.229.167
5410.167.229.168/2910.167.229.169 – 10.167.229.17410.167.229.175
5510.167.229.176/2910.167.229.177 – 10.167.229.18210.167.229.183
5610.167.229.184/2910.167.229.185 – 10.167.229.19010.167.229.191
5710.167.229.192/2910.167.229.193 – 10.167.229.19810.167.229.199
5810.167.229.200/2910.167.229.201 – 10.167.229.20610.167.229.207
5910.167.229.208/2910.167.229.209 – 10.167.229.21410.167.229.215
6010.167.229.216/2910.167.229.217 – 10.167.229.22210.167.229.223
6110.167.229.224/2910.167.229.225 – 10.167.229.23010.167.229.231
6210.167.229.232/2910.167.229.233 – 10.167.229.23810.167.229.239
6310.167.229.240/2910.167.229.241 – 10.167.229.24610.167.229.247
6410.167.229.248/2910.167.229.249 – 10.167.229.25410.167.229.255
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 →