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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)10.167.252.0/23
network10.167.252.0/23
broadcast10.167.253.255
first host10.167.252.1
last host10.167.253.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.252.0/23
address00001010.10100111.11111100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.11111100.00000000
broadcast00001010.10100111.11111101.11111111
green = network part, grey = host part
hex0x0aa7fc00
decimal178781184
reverse dns0.252.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:fc00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.252.0/2910.167.252.1 – 10.167.252.610.167.252.7
210.167.252.8/2910.167.252.9 – 10.167.252.1410.167.252.15
310.167.252.16/2910.167.252.17 – 10.167.252.2210.167.252.23
410.167.252.24/2910.167.252.25 – 10.167.252.3010.167.252.31
510.167.252.32/2910.167.252.33 – 10.167.252.3810.167.252.39
610.167.252.40/2910.167.252.41 – 10.167.252.4610.167.252.47
710.167.252.48/2910.167.252.49 – 10.167.252.5410.167.252.55
810.167.252.56/2910.167.252.57 – 10.167.252.6210.167.252.63
910.167.252.64/2910.167.252.65 – 10.167.252.7010.167.252.71
1010.167.252.72/2910.167.252.73 – 10.167.252.7810.167.252.79
1110.167.252.80/2910.167.252.81 – 10.167.252.8610.167.252.87
1210.167.252.88/2910.167.252.89 – 10.167.252.9410.167.252.95
1310.167.252.96/2910.167.252.97 – 10.167.252.10210.167.252.103
1410.167.252.104/2910.167.252.105 – 10.167.252.11010.167.252.111
1510.167.252.112/2910.167.252.113 – 10.167.252.11810.167.252.119
1610.167.252.120/2910.167.252.121 – 10.167.252.12610.167.252.127
1710.167.252.128/2910.167.252.129 – 10.167.252.13410.167.252.135
1810.167.252.136/2910.167.252.137 – 10.167.252.14210.167.252.143
1910.167.252.144/2910.167.252.145 – 10.167.252.15010.167.252.151
2010.167.252.152/2910.167.252.153 – 10.167.252.15810.167.252.159
2110.167.252.160/2910.167.252.161 – 10.167.252.16610.167.252.167
2210.167.252.168/2910.167.252.169 – 10.167.252.17410.167.252.175
2310.167.252.176/2910.167.252.177 – 10.167.252.18210.167.252.183
2410.167.252.184/2910.167.252.185 – 10.167.252.19010.167.252.191
2510.167.252.192/2910.167.252.193 – 10.167.252.19810.167.252.199
2610.167.252.200/2910.167.252.201 – 10.167.252.20610.167.252.207
2710.167.252.208/2910.167.252.209 – 10.167.252.21410.167.252.215
2810.167.252.216/2910.167.252.217 – 10.167.252.22210.167.252.223
2910.167.252.224/2910.167.252.225 – 10.167.252.23010.167.252.231
3010.167.252.232/2910.167.252.233 – 10.167.252.23810.167.252.239
3110.167.252.240/2910.167.252.241 – 10.167.252.24610.167.252.247
3210.167.252.248/2910.167.252.249 – 10.167.252.25410.167.252.255
3310.167.253.0/2910.167.253.1 – 10.167.253.610.167.253.7
3410.167.253.8/2910.167.253.9 – 10.167.253.1410.167.253.15
3510.167.253.16/2910.167.253.17 – 10.167.253.2210.167.253.23
3610.167.253.24/2910.167.253.25 – 10.167.253.3010.167.253.31
3710.167.253.32/2910.167.253.33 – 10.167.253.3810.167.253.39
3810.167.253.40/2910.167.253.41 – 10.167.253.4610.167.253.47
3910.167.253.48/2910.167.253.49 – 10.167.253.5410.167.253.55
4010.167.253.56/2910.167.253.57 – 10.167.253.6210.167.253.63
4110.167.253.64/2910.167.253.65 – 10.167.253.7010.167.253.71
4210.167.253.72/2910.167.253.73 – 10.167.253.7810.167.253.79
4310.167.253.80/2910.167.253.81 – 10.167.253.8610.167.253.87
4410.167.253.88/2910.167.253.89 – 10.167.253.9410.167.253.95
4510.167.253.96/2910.167.253.97 – 10.167.253.10210.167.253.103
4610.167.253.104/2910.167.253.105 – 10.167.253.11010.167.253.111
4710.167.253.112/2910.167.253.113 – 10.167.253.11810.167.253.119
4810.167.253.120/2910.167.253.121 – 10.167.253.12610.167.253.127
4910.167.253.128/2910.167.253.129 – 10.167.253.13410.167.253.135
5010.167.253.136/2910.167.253.137 – 10.167.253.14210.167.253.143
5110.167.253.144/2910.167.253.145 – 10.167.253.15010.167.253.151
5210.167.253.152/2910.167.253.153 – 10.167.253.15810.167.253.159
5310.167.253.160/2910.167.253.161 – 10.167.253.16610.167.253.167
5410.167.253.168/2910.167.253.169 – 10.167.253.17410.167.253.175
5510.167.253.176/2910.167.253.177 – 10.167.253.18210.167.253.183
5610.167.253.184/2910.167.253.185 – 10.167.253.19010.167.253.191
5710.167.253.192/2910.167.253.193 – 10.167.253.19810.167.253.199
5810.167.253.200/2910.167.253.201 – 10.167.253.20610.167.253.207
5910.167.253.208/2910.167.253.209 – 10.167.253.21410.167.253.215
6010.167.253.216/2910.167.253.217 – 10.167.253.22210.167.253.223
6110.167.253.224/2910.167.253.225 – 10.167.253.23010.167.253.231
6210.167.253.232/2910.167.253.233 – 10.167.253.23810.167.253.239
6310.167.253.240/2910.167.253.241 – 10.167.253.24610.167.253.247
6410.167.253.248/2910.167.253.249 – 10.167.253.25410.167.253.255
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 →