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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)10.167.154.0/23
network10.167.154.0/23
broadcast10.167.155.255
first host10.167.154.1
last host10.167.155.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.154.0/23
address00001010.10100111.10011010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.10011010.00000000
broadcast00001010.10100111.10011011.11111111
green = network part, grey = host part
hex0x0aa79a00
decimal178756096
reverse dns0.154.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:9a00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.154.0/2910.167.154.1 – 10.167.154.610.167.154.7
210.167.154.8/2910.167.154.9 – 10.167.154.1410.167.154.15
310.167.154.16/2910.167.154.17 – 10.167.154.2210.167.154.23
410.167.154.24/2910.167.154.25 – 10.167.154.3010.167.154.31
510.167.154.32/2910.167.154.33 – 10.167.154.3810.167.154.39
610.167.154.40/2910.167.154.41 – 10.167.154.4610.167.154.47
710.167.154.48/2910.167.154.49 – 10.167.154.5410.167.154.55
810.167.154.56/2910.167.154.57 – 10.167.154.6210.167.154.63
910.167.154.64/2910.167.154.65 – 10.167.154.7010.167.154.71
1010.167.154.72/2910.167.154.73 – 10.167.154.7810.167.154.79
1110.167.154.80/2910.167.154.81 – 10.167.154.8610.167.154.87
1210.167.154.88/2910.167.154.89 – 10.167.154.9410.167.154.95
1310.167.154.96/2910.167.154.97 – 10.167.154.10210.167.154.103
1410.167.154.104/2910.167.154.105 – 10.167.154.11010.167.154.111
1510.167.154.112/2910.167.154.113 – 10.167.154.11810.167.154.119
1610.167.154.120/2910.167.154.121 – 10.167.154.12610.167.154.127
1710.167.154.128/2910.167.154.129 – 10.167.154.13410.167.154.135
1810.167.154.136/2910.167.154.137 – 10.167.154.14210.167.154.143
1910.167.154.144/2910.167.154.145 – 10.167.154.15010.167.154.151
2010.167.154.152/2910.167.154.153 – 10.167.154.15810.167.154.159
2110.167.154.160/2910.167.154.161 – 10.167.154.16610.167.154.167
2210.167.154.168/2910.167.154.169 – 10.167.154.17410.167.154.175
2310.167.154.176/2910.167.154.177 – 10.167.154.18210.167.154.183
2410.167.154.184/2910.167.154.185 – 10.167.154.19010.167.154.191
2510.167.154.192/2910.167.154.193 – 10.167.154.19810.167.154.199
2610.167.154.200/2910.167.154.201 – 10.167.154.20610.167.154.207
2710.167.154.208/2910.167.154.209 – 10.167.154.21410.167.154.215
2810.167.154.216/2910.167.154.217 – 10.167.154.22210.167.154.223
2910.167.154.224/2910.167.154.225 – 10.167.154.23010.167.154.231
3010.167.154.232/2910.167.154.233 – 10.167.154.23810.167.154.239
3110.167.154.240/2910.167.154.241 – 10.167.154.24610.167.154.247
3210.167.154.248/2910.167.154.249 – 10.167.154.25410.167.154.255
3310.167.155.0/2910.167.155.1 – 10.167.155.610.167.155.7
3410.167.155.8/2910.167.155.9 – 10.167.155.1410.167.155.15
3510.167.155.16/2910.167.155.17 – 10.167.155.2210.167.155.23
3610.167.155.24/2910.167.155.25 – 10.167.155.3010.167.155.31
3710.167.155.32/2910.167.155.33 – 10.167.155.3810.167.155.39
3810.167.155.40/2910.167.155.41 – 10.167.155.4610.167.155.47
3910.167.155.48/2910.167.155.49 – 10.167.155.5410.167.155.55
4010.167.155.56/2910.167.155.57 – 10.167.155.6210.167.155.63
4110.167.155.64/2910.167.155.65 – 10.167.155.7010.167.155.71
4210.167.155.72/2910.167.155.73 – 10.167.155.7810.167.155.79
4310.167.155.80/2910.167.155.81 – 10.167.155.8610.167.155.87
4410.167.155.88/2910.167.155.89 – 10.167.155.9410.167.155.95
4510.167.155.96/2910.167.155.97 – 10.167.155.10210.167.155.103
4610.167.155.104/2910.167.155.105 – 10.167.155.11010.167.155.111
4710.167.155.112/2910.167.155.113 – 10.167.155.11810.167.155.119
4810.167.155.120/2910.167.155.121 – 10.167.155.12610.167.155.127
4910.167.155.128/2910.167.155.129 – 10.167.155.13410.167.155.135
5010.167.155.136/2910.167.155.137 – 10.167.155.14210.167.155.143
5110.167.155.144/2910.167.155.145 – 10.167.155.15010.167.155.151
5210.167.155.152/2910.167.155.153 – 10.167.155.15810.167.155.159
5310.167.155.160/2910.167.155.161 – 10.167.155.16610.167.155.167
5410.167.155.168/2910.167.155.169 – 10.167.155.17410.167.155.175
5510.167.155.176/2910.167.155.177 – 10.167.155.18210.167.155.183
5610.167.155.184/2910.167.155.185 – 10.167.155.19010.167.155.191
5710.167.155.192/2910.167.155.193 – 10.167.155.19810.167.155.199
5810.167.155.200/2910.167.155.201 – 10.167.155.20610.167.155.207
5910.167.155.208/2910.167.155.209 – 10.167.155.21410.167.155.215
6010.167.155.216/2910.167.155.217 – 10.167.155.22210.167.155.223
6110.167.155.224/2910.167.155.225 – 10.167.155.23010.167.155.231
6210.167.155.232/2910.167.155.233 – 10.167.155.23810.167.155.239
6310.167.155.240/2910.167.155.241 – 10.167.155.24610.167.155.247
6410.167.155.248/2910.167.155.249 – 10.167.155.25410.167.155.255
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 →