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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)10.167.244.0/23
network10.167.244.0/23
broadcast10.167.245.255
first host10.167.244.1
last host10.167.245.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.244.0/23
address00001010.10100111.11110100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.11110100.00000000
broadcast00001010.10100111.11110101.11111111
green = network part, grey = host part
hex0x0aa7f400
decimal178779136
reverse dns0.244.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:f400

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.244.0/2910.167.244.1 – 10.167.244.610.167.244.7
210.167.244.8/2910.167.244.9 – 10.167.244.1410.167.244.15
310.167.244.16/2910.167.244.17 – 10.167.244.2210.167.244.23
410.167.244.24/2910.167.244.25 – 10.167.244.3010.167.244.31
510.167.244.32/2910.167.244.33 – 10.167.244.3810.167.244.39
610.167.244.40/2910.167.244.41 – 10.167.244.4610.167.244.47
710.167.244.48/2910.167.244.49 – 10.167.244.5410.167.244.55
810.167.244.56/2910.167.244.57 – 10.167.244.6210.167.244.63
910.167.244.64/2910.167.244.65 – 10.167.244.7010.167.244.71
1010.167.244.72/2910.167.244.73 – 10.167.244.7810.167.244.79
1110.167.244.80/2910.167.244.81 – 10.167.244.8610.167.244.87
1210.167.244.88/2910.167.244.89 – 10.167.244.9410.167.244.95
1310.167.244.96/2910.167.244.97 – 10.167.244.10210.167.244.103
1410.167.244.104/2910.167.244.105 – 10.167.244.11010.167.244.111
1510.167.244.112/2910.167.244.113 – 10.167.244.11810.167.244.119
1610.167.244.120/2910.167.244.121 – 10.167.244.12610.167.244.127
1710.167.244.128/2910.167.244.129 – 10.167.244.13410.167.244.135
1810.167.244.136/2910.167.244.137 – 10.167.244.14210.167.244.143
1910.167.244.144/2910.167.244.145 – 10.167.244.15010.167.244.151
2010.167.244.152/2910.167.244.153 – 10.167.244.15810.167.244.159
2110.167.244.160/2910.167.244.161 – 10.167.244.16610.167.244.167
2210.167.244.168/2910.167.244.169 – 10.167.244.17410.167.244.175
2310.167.244.176/2910.167.244.177 – 10.167.244.18210.167.244.183
2410.167.244.184/2910.167.244.185 – 10.167.244.19010.167.244.191
2510.167.244.192/2910.167.244.193 – 10.167.244.19810.167.244.199
2610.167.244.200/2910.167.244.201 – 10.167.244.20610.167.244.207
2710.167.244.208/2910.167.244.209 – 10.167.244.21410.167.244.215
2810.167.244.216/2910.167.244.217 – 10.167.244.22210.167.244.223
2910.167.244.224/2910.167.244.225 – 10.167.244.23010.167.244.231
3010.167.244.232/2910.167.244.233 – 10.167.244.23810.167.244.239
3110.167.244.240/2910.167.244.241 – 10.167.244.24610.167.244.247
3210.167.244.248/2910.167.244.249 – 10.167.244.25410.167.244.255
3310.167.245.0/2910.167.245.1 – 10.167.245.610.167.245.7
3410.167.245.8/2910.167.245.9 – 10.167.245.1410.167.245.15
3510.167.245.16/2910.167.245.17 – 10.167.245.2210.167.245.23
3610.167.245.24/2910.167.245.25 – 10.167.245.3010.167.245.31
3710.167.245.32/2910.167.245.33 – 10.167.245.3810.167.245.39
3810.167.245.40/2910.167.245.41 – 10.167.245.4610.167.245.47
3910.167.245.48/2910.167.245.49 – 10.167.245.5410.167.245.55
4010.167.245.56/2910.167.245.57 – 10.167.245.6210.167.245.63
4110.167.245.64/2910.167.245.65 – 10.167.245.7010.167.245.71
4210.167.245.72/2910.167.245.73 – 10.167.245.7810.167.245.79
4310.167.245.80/2910.167.245.81 – 10.167.245.8610.167.245.87
4410.167.245.88/2910.167.245.89 – 10.167.245.9410.167.245.95
4510.167.245.96/2910.167.245.97 – 10.167.245.10210.167.245.103
4610.167.245.104/2910.167.245.105 – 10.167.245.11010.167.245.111
4710.167.245.112/2910.167.245.113 – 10.167.245.11810.167.245.119
4810.167.245.120/2910.167.245.121 – 10.167.245.12610.167.245.127
4910.167.245.128/2910.167.245.129 – 10.167.245.13410.167.245.135
5010.167.245.136/2910.167.245.137 – 10.167.245.14210.167.245.143
5110.167.245.144/2910.167.245.145 – 10.167.245.15010.167.245.151
5210.167.245.152/2910.167.245.153 – 10.167.245.15810.167.245.159
5310.167.245.160/2910.167.245.161 – 10.167.245.16610.167.245.167
5410.167.245.168/2910.167.245.169 – 10.167.245.17410.167.245.175
5510.167.245.176/2910.167.245.177 – 10.167.245.18210.167.245.183
5610.167.245.184/2910.167.245.185 – 10.167.245.19010.167.245.191
5710.167.245.192/2910.167.245.193 – 10.167.245.19810.167.245.199
5810.167.245.200/2910.167.245.201 – 10.167.245.20610.167.245.207
5910.167.245.208/2910.167.245.209 – 10.167.245.21410.167.245.215
6010.167.245.216/2910.167.245.217 – 10.167.245.22210.167.245.223
6110.167.245.224/2910.167.245.225 – 10.167.245.23010.167.245.231
6210.167.245.232/2910.167.245.233 – 10.167.245.23810.167.245.239
6310.167.245.240/2910.167.245.241 – 10.167.245.24610.167.245.247
6410.167.245.248/2910.167.245.249 – 10.167.245.25410.167.245.255
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 →