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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)10.136.52.0/23
network10.136.52.0/23
broadcast10.136.53.255
first host10.136.52.1
last host10.136.53.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.136.52.0/23
address00001010.10001000.00110100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10001000.00110100.00000000
broadcast00001010.10001000.00110101.11111111
green = network part, grey = host part
hex0x0a883400
decimal176698368
reverse dns0.52.136.10.in-addr.arpa
ipv4-mapped::ffff:a88:3400

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.136.52.0/2910.136.52.1 – 10.136.52.610.136.52.7
210.136.52.8/2910.136.52.9 – 10.136.52.1410.136.52.15
310.136.52.16/2910.136.52.17 – 10.136.52.2210.136.52.23
410.136.52.24/2910.136.52.25 – 10.136.52.3010.136.52.31
510.136.52.32/2910.136.52.33 – 10.136.52.3810.136.52.39
610.136.52.40/2910.136.52.41 – 10.136.52.4610.136.52.47
710.136.52.48/2910.136.52.49 – 10.136.52.5410.136.52.55
810.136.52.56/2910.136.52.57 – 10.136.52.6210.136.52.63
910.136.52.64/2910.136.52.65 – 10.136.52.7010.136.52.71
1010.136.52.72/2910.136.52.73 – 10.136.52.7810.136.52.79
1110.136.52.80/2910.136.52.81 – 10.136.52.8610.136.52.87
1210.136.52.88/2910.136.52.89 – 10.136.52.9410.136.52.95
1310.136.52.96/2910.136.52.97 – 10.136.52.10210.136.52.103
1410.136.52.104/2910.136.52.105 – 10.136.52.11010.136.52.111
1510.136.52.112/2910.136.52.113 – 10.136.52.11810.136.52.119
1610.136.52.120/2910.136.52.121 – 10.136.52.12610.136.52.127
1710.136.52.128/2910.136.52.129 – 10.136.52.13410.136.52.135
1810.136.52.136/2910.136.52.137 – 10.136.52.14210.136.52.143
1910.136.52.144/2910.136.52.145 – 10.136.52.15010.136.52.151
2010.136.52.152/2910.136.52.153 – 10.136.52.15810.136.52.159
2110.136.52.160/2910.136.52.161 – 10.136.52.16610.136.52.167
2210.136.52.168/2910.136.52.169 – 10.136.52.17410.136.52.175
2310.136.52.176/2910.136.52.177 – 10.136.52.18210.136.52.183
2410.136.52.184/2910.136.52.185 – 10.136.52.19010.136.52.191
2510.136.52.192/2910.136.52.193 – 10.136.52.19810.136.52.199
2610.136.52.200/2910.136.52.201 – 10.136.52.20610.136.52.207
2710.136.52.208/2910.136.52.209 – 10.136.52.21410.136.52.215
2810.136.52.216/2910.136.52.217 – 10.136.52.22210.136.52.223
2910.136.52.224/2910.136.52.225 – 10.136.52.23010.136.52.231
3010.136.52.232/2910.136.52.233 – 10.136.52.23810.136.52.239
3110.136.52.240/2910.136.52.241 – 10.136.52.24610.136.52.247
3210.136.52.248/2910.136.52.249 – 10.136.52.25410.136.52.255
3310.136.53.0/2910.136.53.1 – 10.136.53.610.136.53.7
3410.136.53.8/2910.136.53.9 – 10.136.53.1410.136.53.15
3510.136.53.16/2910.136.53.17 – 10.136.53.2210.136.53.23
3610.136.53.24/2910.136.53.25 – 10.136.53.3010.136.53.31
3710.136.53.32/2910.136.53.33 – 10.136.53.3810.136.53.39
3810.136.53.40/2910.136.53.41 – 10.136.53.4610.136.53.47
3910.136.53.48/2910.136.53.49 – 10.136.53.5410.136.53.55
4010.136.53.56/2910.136.53.57 – 10.136.53.6210.136.53.63
4110.136.53.64/2910.136.53.65 – 10.136.53.7010.136.53.71
4210.136.53.72/2910.136.53.73 – 10.136.53.7810.136.53.79
4310.136.53.80/2910.136.53.81 – 10.136.53.8610.136.53.87
4410.136.53.88/2910.136.53.89 – 10.136.53.9410.136.53.95
4510.136.53.96/2910.136.53.97 – 10.136.53.10210.136.53.103
4610.136.53.104/2910.136.53.105 – 10.136.53.11010.136.53.111
4710.136.53.112/2910.136.53.113 – 10.136.53.11810.136.53.119
4810.136.53.120/2910.136.53.121 – 10.136.53.12610.136.53.127
4910.136.53.128/2910.136.53.129 – 10.136.53.13410.136.53.135
5010.136.53.136/2910.136.53.137 – 10.136.53.14210.136.53.143
5110.136.53.144/2910.136.53.145 – 10.136.53.15010.136.53.151
5210.136.53.152/2910.136.53.153 – 10.136.53.15810.136.53.159
5310.136.53.160/2910.136.53.161 – 10.136.53.16610.136.53.167
5410.136.53.168/2910.136.53.169 – 10.136.53.17410.136.53.175
5510.136.53.176/2910.136.53.177 – 10.136.53.18210.136.53.183
5610.136.53.184/2910.136.53.185 – 10.136.53.19010.136.53.191
5710.136.53.192/2910.136.53.193 – 10.136.53.19810.136.53.199
5810.136.53.200/2910.136.53.201 – 10.136.53.20610.136.53.207
5910.136.53.208/2910.136.53.209 – 10.136.53.21410.136.53.215
6010.136.53.216/2910.136.53.217 – 10.136.53.22210.136.53.223
6110.136.53.224/2910.136.53.225 – 10.136.53.23010.136.53.231
6210.136.53.232/2910.136.53.233 – 10.136.53.23810.136.53.239
6310.136.53.240/2910.136.53.241 – 10.136.53.24610.136.53.247
6410.136.53.248/2910.136.53.249 – 10.136.53.25410.136.53.255
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 →