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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)10.44.0.0/23
network10.44.0.0/23
broadcast10.44.1.255
first host10.44.0.1
last host10.44.1.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.44.0.0/23
address00001010.00101100.00000000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00101100.00000000.00000000
broadcast00001010.00101100.00000001.11111111
green = network part, grey = host part
hex0x0a2c0000
decimal170655744
reverse dns0.0.44.10.in-addr.arpa
ipv4-mapped::ffff:a2c:0

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.44.0.0/2910.44.0.1 – 10.44.0.610.44.0.7
210.44.0.8/2910.44.0.9 – 10.44.0.1410.44.0.15
310.44.0.16/2910.44.0.17 – 10.44.0.2210.44.0.23
410.44.0.24/2910.44.0.25 – 10.44.0.3010.44.0.31
510.44.0.32/2910.44.0.33 – 10.44.0.3810.44.0.39
610.44.0.40/2910.44.0.41 – 10.44.0.4610.44.0.47
710.44.0.48/2910.44.0.49 – 10.44.0.5410.44.0.55
810.44.0.56/2910.44.0.57 – 10.44.0.6210.44.0.63
910.44.0.64/2910.44.0.65 – 10.44.0.7010.44.0.71
1010.44.0.72/2910.44.0.73 – 10.44.0.7810.44.0.79
1110.44.0.80/2910.44.0.81 – 10.44.0.8610.44.0.87
1210.44.0.88/2910.44.0.89 – 10.44.0.9410.44.0.95
1310.44.0.96/2910.44.0.97 – 10.44.0.10210.44.0.103
1410.44.0.104/2910.44.0.105 – 10.44.0.11010.44.0.111
1510.44.0.112/2910.44.0.113 – 10.44.0.11810.44.0.119
1610.44.0.120/2910.44.0.121 – 10.44.0.12610.44.0.127
1710.44.0.128/2910.44.0.129 – 10.44.0.13410.44.0.135
1810.44.0.136/2910.44.0.137 – 10.44.0.14210.44.0.143
1910.44.0.144/2910.44.0.145 – 10.44.0.15010.44.0.151
2010.44.0.152/2910.44.0.153 – 10.44.0.15810.44.0.159
2110.44.0.160/2910.44.0.161 – 10.44.0.16610.44.0.167
2210.44.0.168/2910.44.0.169 – 10.44.0.17410.44.0.175
2310.44.0.176/2910.44.0.177 – 10.44.0.18210.44.0.183
2410.44.0.184/2910.44.0.185 – 10.44.0.19010.44.0.191
2510.44.0.192/2910.44.0.193 – 10.44.0.19810.44.0.199
2610.44.0.200/2910.44.0.201 – 10.44.0.20610.44.0.207
2710.44.0.208/2910.44.0.209 – 10.44.0.21410.44.0.215
2810.44.0.216/2910.44.0.217 – 10.44.0.22210.44.0.223
2910.44.0.224/2910.44.0.225 – 10.44.0.23010.44.0.231
3010.44.0.232/2910.44.0.233 – 10.44.0.23810.44.0.239
3110.44.0.240/2910.44.0.241 – 10.44.0.24610.44.0.247
3210.44.0.248/2910.44.0.249 – 10.44.0.25410.44.0.255
3310.44.1.0/2910.44.1.1 – 10.44.1.610.44.1.7
3410.44.1.8/2910.44.1.9 – 10.44.1.1410.44.1.15
3510.44.1.16/2910.44.1.17 – 10.44.1.2210.44.1.23
3610.44.1.24/2910.44.1.25 – 10.44.1.3010.44.1.31
3710.44.1.32/2910.44.1.33 – 10.44.1.3810.44.1.39
3810.44.1.40/2910.44.1.41 – 10.44.1.4610.44.1.47
3910.44.1.48/2910.44.1.49 – 10.44.1.5410.44.1.55
4010.44.1.56/2910.44.1.57 – 10.44.1.6210.44.1.63
4110.44.1.64/2910.44.1.65 – 10.44.1.7010.44.1.71
4210.44.1.72/2910.44.1.73 – 10.44.1.7810.44.1.79
4310.44.1.80/2910.44.1.81 – 10.44.1.8610.44.1.87
4410.44.1.88/2910.44.1.89 – 10.44.1.9410.44.1.95
4510.44.1.96/2910.44.1.97 – 10.44.1.10210.44.1.103
4610.44.1.104/2910.44.1.105 – 10.44.1.11010.44.1.111
4710.44.1.112/2910.44.1.113 – 10.44.1.11810.44.1.119
4810.44.1.120/2910.44.1.121 – 10.44.1.12610.44.1.127
4910.44.1.128/2910.44.1.129 – 10.44.1.13410.44.1.135
5010.44.1.136/2910.44.1.137 – 10.44.1.14210.44.1.143
5110.44.1.144/2910.44.1.145 – 10.44.1.15010.44.1.151
5210.44.1.152/2910.44.1.153 – 10.44.1.15810.44.1.159
5310.44.1.160/2910.44.1.161 – 10.44.1.16610.44.1.167
5410.44.1.168/2910.44.1.169 – 10.44.1.17410.44.1.175
5510.44.1.176/2910.44.1.177 – 10.44.1.18210.44.1.183
5610.44.1.184/2910.44.1.185 – 10.44.1.19010.44.1.191
5710.44.1.192/2910.44.1.193 – 10.44.1.19810.44.1.199
5810.44.1.200/2910.44.1.201 – 10.44.1.20610.44.1.207
5910.44.1.208/2910.44.1.209 – 10.44.1.21410.44.1.215
6010.44.1.216/2910.44.1.217 – 10.44.1.22210.44.1.223
6110.44.1.224/2910.44.1.225 – 10.44.1.23010.44.1.231
6210.44.1.232/2910.44.1.233 – 10.44.1.23810.44.1.239
6310.44.1.240/2910.44.1.241 – 10.44.1.24610.44.1.247
6410.44.1.248/2910.44.1.249 – 10.44.1.25410.44.1.255
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 →