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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)10.63.52.0/23
network10.63.52.0/23
broadcast10.63.53.255
first host10.63.52.1
last host10.63.53.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.63.52.0/23
address00001010.00111111.00110100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00111111.00110100.00000000
broadcast00001010.00111111.00110101.11111111
green = network part, grey = host part
hex0x0a3f3400
decimal171914240
reverse dns0.52.63.10.in-addr.arpa
ipv4-mapped::ffff:a3f:3400

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.63.52.0/2910.63.52.1 – 10.63.52.610.63.52.7
210.63.52.8/2910.63.52.9 – 10.63.52.1410.63.52.15
310.63.52.16/2910.63.52.17 – 10.63.52.2210.63.52.23
410.63.52.24/2910.63.52.25 – 10.63.52.3010.63.52.31
510.63.52.32/2910.63.52.33 – 10.63.52.3810.63.52.39
610.63.52.40/2910.63.52.41 – 10.63.52.4610.63.52.47
710.63.52.48/2910.63.52.49 – 10.63.52.5410.63.52.55
810.63.52.56/2910.63.52.57 – 10.63.52.6210.63.52.63
910.63.52.64/2910.63.52.65 – 10.63.52.7010.63.52.71
1010.63.52.72/2910.63.52.73 – 10.63.52.7810.63.52.79
1110.63.52.80/2910.63.52.81 – 10.63.52.8610.63.52.87
1210.63.52.88/2910.63.52.89 – 10.63.52.9410.63.52.95
1310.63.52.96/2910.63.52.97 – 10.63.52.10210.63.52.103
1410.63.52.104/2910.63.52.105 – 10.63.52.11010.63.52.111
1510.63.52.112/2910.63.52.113 – 10.63.52.11810.63.52.119
1610.63.52.120/2910.63.52.121 – 10.63.52.12610.63.52.127
1710.63.52.128/2910.63.52.129 – 10.63.52.13410.63.52.135
1810.63.52.136/2910.63.52.137 – 10.63.52.14210.63.52.143
1910.63.52.144/2910.63.52.145 – 10.63.52.15010.63.52.151
2010.63.52.152/2910.63.52.153 – 10.63.52.15810.63.52.159
2110.63.52.160/2910.63.52.161 – 10.63.52.16610.63.52.167
2210.63.52.168/2910.63.52.169 – 10.63.52.17410.63.52.175
2310.63.52.176/2910.63.52.177 – 10.63.52.18210.63.52.183
2410.63.52.184/2910.63.52.185 – 10.63.52.19010.63.52.191
2510.63.52.192/2910.63.52.193 – 10.63.52.19810.63.52.199
2610.63.52.200/2910.63.52.201 – 10.63.52.20610.63.52.207
2710.63.52.208/2910.63.52.209 – 10.63.52.21410.63.52.215
2810.63.52.216/2910.63.52.217 – 10.63.52.22210.63.52.223
2910.63.52.224/2910.63.52.225 – 10.63.52.23010.63.52.231
3010.63.52.232/2910.63.52.233 – 10.63.52.23810.63.52.239
3110.63.52.240/2910.63.52.241 – 10.63.52.24610.63.52.247
3210.63.52.248/2910.63.52.249 – 10.63.52.25410.63.52.255
3310.63.53.0/2910.63.53.1 – 10.63.53.610.63.53.7
3410.63.53.8/2910.63.53.9 – 10.63.53.1410.63.53.15
3510.63.53.16/2910.63.53.17 – 10.63.53.2210.63.53.23
3610.63.53.24/2910.63.53.25 – 10.63.53.3010.63.53.31
3710.63.53.32/2910.63.53.33 – 10.63.53.3810.63.53.39
3810.63.53.40/2910.63.53.41 – 10.63.53.4610.63.53.47
3910.63.53.48/2910.63.53.49 – 10.63.53.5410.63.53.55
4010.63.53.56/2910.63.53.57 – 10.63.53.6210.63.53.63
4110.63.53.64/2910.63.53.65 – 10.63.53.7010.63.53.71
4210.63.53.72/2910.63.53.73 – 10.63.53.7810.63.53.79
4310.63.53.80/2910.63.53.81 – 10.63.53.8610.63.53.87
4410.63.53.88/2910.63.53.89 – 10.63.53.9410.63.53.95
4510.63.53.96/2910.63.53.97 – 10.63.53.10210.63.53.103
4610.63.53.104/2910.63.53.105 – 10.63.53.11010.63.53.111
4710.63.53.112/2910.63.53.113 – 10.63.53.11810.63.53.119
4810.63.53.120/2910.63.53.121 – 10.63.53.12610.63.53.127
4910.63.53.128/2910.63.53.129 – 10.63.53.13410.63.53.135
5010.63.53.136/2910.63.53.137 – 10.63.53.14210.63.53.143
5110.63.53.144/2910.63.53.145 – 10.63.53.15010.63.53.151
5210.63.53.152/2910.63.53.153 – 10.63.53.15810.63.53.159
5310.63.53.160/2910.63.53.161 – 10.63.53.16610.63.53.167
5410.63.53.168/2910.63.53.169 – 10.63.53.17410.63.53.175
5510.63.53.176/2910.63.53.177 – 10.63.53.18210.63.53.183
5610.63.53.184/2910.63.53.185 – 10.63.53.19010.63.53.191
5710.63.53.192/2910.63.53.193 – 10.63.53.19810.63.53.199
5810.63.53.200/2910.63.53.201 – 10.63.53.20610.63.53.207
5910.63.53.208/2910.63.53.209 – 10.63.53.21410.63.53.215
6010.63.53.216/2910.63.53.217 – 10.63.53.22210.63.53.223
6110.63.53.224/2910.63.53.225 – 10.63.53.23010.63.53.231
6210.63.53.232/2910.63.53.233 – 10.63.53.23810.63.53.239
6310.63.53.240/2910.63.53.241 – 10.63.53.24610.63.53.247
6410.63.53.248/2910.63.53.249 – 10.63.53.25410.63.53.255
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 →