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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)10.167.160.0/23
network10.167.160.0/23
broadcast10.167.161.255
first host10.167.160.1
last host10.167.161.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.160.0/23
address00001010.10100111.10100000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.10100000.00000000
broadcast00001010.10100111.10100001.11111111
green = network part, grey = host part
hex0x0aa7a000
decimal178757632
reverse dns0.160.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:a000

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.160.0/2910.167.160.1 – 10.167.160.610.167.160.7
210.167.160.8/2910.167.160.9 – 10.167.160.1410.167.160.15
310.167.160.16/2910.167.160.17 – 10.167.160.2210.167.160.23
410.167.160.24/2910.167.160.25 – 10.167.160.3010.167.160.31
510.167.160.32/2910.167.160.33 – 10.167.160.3810.167.160.39
610.167.160.40/2910.167.160.41 – 10.167.160.4610.167.160.47
710.167.160.48/2910.167.160.49 – 10.167.160.5410.167.160.55
810.167.160.56/2910.167.160.57 – 10.167.160.6210.167.160.63
910.167.160.64/2910.167.160.65 – 10.167.160.7010.167.160.71
1010.167.160.72/2910.167.160.73 – 10.167.160.7810.167.160.79
1110.167.160.80/2910.167.160.81 – 10.167.160.8610.167.160.87
1210.167.160.88/2910.167.160.89 – 10.167.160.9410.167.160.95
1310.167.160.96/2910.167.160.97 – 10.167.160.10210.167.160.103
1410.167.160.104/2910.167.160.105 – 10.167.160.11010.167.160.111
1510.167.160.112/2910.167.160.113 – 10.167.160.11810.167.160.119
1610.167.160.120/2910.167.160.121 – 10.167.160.12610.167.160.127
1710.167.160.128/2910.167.160.129 – 10.167.160.13410.167.160.135
1810.167.160.136/2910.167.160.137 – 10.167.160.14210.167.160.143
1910.167.160.144/2910.167.160.145 – 10.167.160.15010.167.160.151
2010.167.160.152/2910.167.160.153 – 10.167.160.15810.167.160.159
2110.167.160.160/2910.167.160.161 – 10.167.160.16610.167.160.167
2210.167.160.168/2910.167.160.169 – 10.167.160.17410.167.160.175
2310.167.160.176/2910.167.160.177 – 10.167.160.18210.167.160.183
2410.167.160.184/2910.167.160.185 – 10.167.160.19010.167.160.191
2510.167.160.192/2910.167.160.193 – 10.167.160.19810.167.160.199
2610.167.160.200/2910.167.160.201 – 10.167.160.20610.167.160.207
2710.167.160.208/2910.167.160.209 – 10.167.160.21410.167.160.215
2810.167.160.216/2910.167.160.217 – 10.167.160.22210.167.160.223
2910.167.160.224/2910.167.160.225 – 10.167.160.23010.167.160.231
3010.167.160.232/2910.167.160.233 – 10.167.160.23810.167.160.239
3110.167.160.240/2910.167.160.241 – 10.167.160.24610.167.160.247
3210.167.160.248/2910.167.160.249 – 10.167.160.25410.167.160.255
3310.167.161.0/2910.167.161.1 – 10.167.161.610.167.161.7
3410.167.161.8/2910.167.161.9 – 10.167.161.1410.167.161.15
3510.167.161.16/2910.167.161.17 – 10.167.161.2210.167.161.23
3610.167.161.24/2910.167.161.25 – 10.167.161.3010.167.161.31
3710.167.161.32/2910.167.161.33 – 10.167.161.3810.167.161.39
3810.167.161.40/2910.167.161.41 – 10.167.161.4610.167.161.47
3910.167.161.48/2910.167.161.49 – 10.167.161.5410.167.161.55
4010.167.161.56/2910.167.161.57 – 10.167.161.6210.167.161.63
4110.167.161.64/2910.167.161.65 – 10.167.161.7010.167.161.71
4210.167.161.72/2910.167.161.73 – 10.167.161.7810.167.161.79
4310.167.161.80/2910.167.161.81 – 10.167.161.8610.167.161.87
4410.167.161.88/2910.167.161.89 – 10.167.161.9410.167.161.95
4510.167.161.96/2910.167.161.97 – 10.167.161.10210.167.161.103
4610.167.161.104/2910.167.161.105 – 10.167.161.11010.167.161.111
4710.167.161.112/2910.167.161.113 – 10.167.161.11810.167.161.119
4810.167.161.120/2910.167.161.121 – 10.167.161.12610.167.161.127
4910.167.161.128/2910.167.161.129 – 10.167.161.13410.167.161.135
5010.167.161.136/2910.167.161.137 – 10.167.161.14210.167.161.143
5110.167.161.144/2910.167.161.145 – 10.167.161.15010.167.161.151
5210.167.161.152/2910.167.161.153 – 10.167.161.15810.167.161.159
5310.167.161.160/2910.167.161.161 – 10.167.161.16610.167.161.167
5410.167.161.168/2910.167.161.169 – 10.167.161.17410.167.161.175
5510.167.161.176/2910.167.161.177 – 10.167.161.18210.167.161.183
5610.167.161.184/2910.167.161.185 – 10.167.161.19010.167.161.191
5710.167.161.192/2910.167.161.193 – 10.167.161.19810.167.161.199
5810.167.161.200/2910.167.161.201 – 10.167.161.20610.167.161.207
5910.167.161.208/2910.167.161.209 – 10.167.161.21410.167.161.215
6010.167.161.216/2910.167.161.217 – 10.167.161.22210.167.161.223
6110.167.161.224/2910.167.161.225 – 10.167.161.23010.167.161.231
6210.167.161.232/2910.167.161.233 – 10.167.161.23810.167.161.239
6310.167.161.240/2910.167.161.241 – 10.167.161.24610.167.161.247
6410.167.161.248/2910.167.161.249 – 10.167.161.25410.167.161.255
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 →