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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)10.1.114.0/23
network10.1.114.0/23
broadcast10.1.115.255
first host10.1.114.1
last host10.1.115.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.1.114.0/23
address00001010.00000001.01110010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000001.01110010.00000000
broadcast00001010.00000001.01110011.11111111
green = network part, grey = host part
hex0x0a017200
decimal167866880
reverse dns0.114.1.10.in-addr.arpa
ipv4-mapped::ffff:a01:7200

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.1.114.0/2910.1.114.1 – 10.1.114.610.1.114.7
210.1.114.8/2910.1.114.9 – 10.1.114.1410.1.114.15
310.1.114.16/2910.1.114.17 – 10.1.114.2210.1.114.23
410.1.114.24/2910.1.114.25 – 10.1.114.3010.1.114.31
510.1.114.32/2910.1.114.33 – 10.1.114.3810.1.114.39
610.1.114.40/2910.1.114.41 – 10.1.114.4610.1.114.47
710.1.114.48/2910.1.114.49 – 10.1.114.5410.1.114.55
810.1.114.56/2910.1.114.57 – 10.1.114.6210.1.114.63
910.1.114.64/2910.1.114.65 – 10.1.114.7010.1.114.71
1010.1.114.72/2910.1.114.73 – 10.1.114.7810.1.114.79
1110.1.114.80/2910.1.114.81 – 10.1.114.8610.1.114.87
1210.1.114.88/2910.1.114.89 – 10.1.114.9410.1.114.95
1310.1.114.96/2910.1.114.97 – 10.1.114.10210.1.114.103
1410.1.114.104/2910.1.114.105 – 10.1.114.11010.1.114.111
1510.1.114.112/2910.1.114.113 – 10.1.114.11810.1.114.119
1610.1.114.120/2910.1.114.121 – 10.1.114.12610.1.114.127
1710.1.114.128/2910.1.114.129 – 10.1.114.13410.1.114.135
1810.1.114.136/2910.1.114.137 – 10.1.114.14210.1.114.143
1910.1.114.144/2910.1.114.145 – 10.1.114.15010.1.114.151
2010.1.114.152/2910.1.114.153 – 10.1.114.15810.1.114.159
2110.1.114.160/2910.1.114.161 – 10.1.114.16610.1.114.167
2210.1.114.168/2910.1.114.169 – 10.1.114.17410.1.114.175
2310.1.114.176/2910.1.114.177 – 10.1.114.18210.1.114.183
2410.1.114.184/2910.1.114.185 – 10.1.114.19010.1.114.191
2510.1.114.192/2910.1.114.193 – 10.1.114.19810.1.114.199
2610.1.114.200/2910.1.114.201 – 10.1.114.20610.1.114.207
2710.1.114.208/2910.1.114.209 – 10.1.114.21410.1.114.215
2810.1.114.216/2910.1.114.217 – 10.1.114.22210.1.114.223
2910.1.114.224/2910.1.114.225 – 10.1.114.23010.1.114.231
3010.1.114.232/2910.1.114.233 – 10.1.114.23810.1.114.239
3110.1.114.240/2910.1.114.241 – 10.1.114.24610.1.114.247
3210.1.114.248/2910.1.114.249 – 10.1.114.25410.1.114.255
3310.1.115.0/2910.1.115.1 – 10.1.115.610.1.115.7
3410.1.115.8/2910.1.115.9 – 10.1.115.1410.1.115.15
3510.1.115.16/2910.1.115.17 – 10.1.115.2210.1.115.23
3610.1.115.24/2910.1.115.25 – 10.1.115.3010.1.115.31
3710.1.115.32/2910.1.115.33 – 10.1.115.3810.1.115.39
3810.1.115.40/2910.1.115.41 – 10.1.115.4610.1.115.47
3910.1.115.48/2910.1.115.49 – 10.1.115.5410.1.115.55
4010.1.115.56/2910.1.115.57 – 10.1.115.6210.1.115.63
4110.1.115.64/2910.1.115.65 – 10.1.115.7010.1.115.71
4210.1.115.72/2910.1.115.73 – 10.1.115.7810.1.115.79
4310.1.115.80/2910.1.115.81 – 10.1.115.8610.1.115.87
4410.1.115.88/2910.1.115.89 – 10.1.115.9410.1.115.95
4510.1.115.96/2910.1.115.97 – 10.1.115.10210.1.115.103
4610.1.115.104/2910.1.115.105 – 10.1.115.11010.1.115.111
4710.1.115.112/2910.1.115.113 – 10.1.115.11810.1.115.119
4810.1.115.120/2910.1.115.121 – 10.1.115.12610.1.115.127
4910.1.115.128/2910.1.115.129 – 10.1.115.13410.1.115.135
5010.1.115.136/2910.1.115.137 – 10.1.115.14210.1.115.143
5110.1.115.144/2910.1.115.145 – 10.1.115.15010.1.115.151
5210.1.115.152/2910.1.115.153 – 10.1.115.15810.1.115.159
5310.1.115.160/2910.1.115.161 – 10.1.115.16610.1.115.167
5410.1.115.168/2910.1.115.169 – 10.1.115.17410.1.115.175
5510.1.115.176/2910.1.115.177 – 10.1.115.18210.1.115.183
5610.1.115.184/2910.1.115.185 – 10.1.115.19010.1.115.191
5710.1.115.192/2910.1.115.193 – 10.1.115.19810.1.115.199
5810.1.115.200/2910.1.115.201 – 10.1.115.20610.1.115.207
5910.1.115.208/2910.1.115.209 – 10.1.115.21410.1.115.215
6010.1.115.216/2910.1.115.217 – 10.1.115.22210.1.115.223
6110.1.115.224/2910.1.115.225 – 10.1.115.23010.1.115.231
6210.1.115.232/2910.1.115.233 – 10.1.115.23810.1.115.239
6310.1.115.240/2910.1.115.241 – 10.1.115.24610.1.115.247
6410.1.115.248/2910.1.115.249 – 10.1.115.25410.1.115.255
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 →