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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)10.26.28.0/23
network10.26.28.0/23
broadcast10.26.29.255
first host10.26.28.1
last host10.26.29.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.26.28.0/23
address00001010.00011010.00011100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00011010.00011100.00000000
broadcast00001010.00011010.00011101.11111111
green = network part, grey = host part
hex0x0a1a1c00
decimal169483264
reverse dns0.28.26.10.in-addr.arpa
ipv4-mapped::ffff:a1a:1c00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.26.28.0/2910.26.28.1 – 10.26.28.610.26.28.7
210.26.28.8/2910.26.28.9 – 10.26.28.1410.26.28.15
310.26.28.16/2910.26.28.17 – 10.26.28.2210.26.28.23
410.26.28.24/2910.26.28.25 – 10.26.28.3010.26.28.31
510.26.28.32/2910.26.28.33 – 10.26.28.3810.26.28.39
610.26.28.40/2910.26.28.41 – 10.26.28.4610.26.28.47
710.26.28.48/2910.26.28.49 – 10.26.28.5410.26.28.55
810.26.28.56/2910.26.28.57 – 10.26.28.6210.26.28.63
910.26.28.64/2910.26.28.65 – 10.26.28.7010.26.28.71
1010.26.28.72/2910.26.28.73 – 10.26.28.7810.26.28.79
1110.26.28.80/2910.26.28.81 – 10.26.28.8610.26.28.87
1210.26.28.88/2910.26.28.89 – 10.26.28.9410.26.28.95
1310.26.28.96/2910.26.28.97 – 10.26.28.10210.26.28.103
1410.26.28.104/2910.26.28.105 – 10.26.28.11010.26.28.111
1510.26.28.112/2910.26.28.113 – 10.26.28.11810.26.28.119
1610.26.28.120/2910.26.28.121 – 10.26.28.12610.26.28.127
1710.26.28.128/2910.26.28.129 – 10.26.28.13410.26.28.135
1810.26.28.136/2910.26.28.137 – 10.26.28.14210.26.28.143
1910.26.28.144/2910.26.28.145 – 10.26.28.15010.26.28.151
2010.26.28.152/2910.26.28.153 – 10.26.28.15810.26.28.159
2110.26.28.160/2910.26.28.161 – 10.26.28.16610.26.28.167
2210.26.28.168/2910.26.28.169 – 10.26.28.17410.26.28.175
2310.26.28.176/2910.26.28.177 – 10.26.28.18210.26.28.183
2410.26.28.184/2910.26.28.185 – 10.26.28.19010.26.28.191
2510.26.28.192/2910.26.28.193 – 10.26.28.19810.26.28.199
2610.26.28.200/2910.26.28.201 – 10.26.28.20610.26.28.207
2710.26.28.208/2910.26.28.209 – 10.26.28.21410.26.28.215
2810.26.28.216/2910.26.28.217 – 10.26.28.22210.26.28.223
2910.26.28.224/2910.26.28.225 – 10.26.28.23010.26.28.231
3010.26.28.232/2910.26.28.233 – 10.26.28.23810.26.28.239
3110.26.28.240/2910.26.28.241 – 10.26.28.24610.26.28.247
3210.26.28.248/2910.26.28.249 – 10.26.28.25410.26.28.255
3310.26.29.0/2910.26.29.1 – 10.26.29.610.26.29.7
3410.26.29.8/2910.26.29.9 – 10.26.29.1410.26.29.15
3510.26.29.16/2910.26.29.17 – 10.26.29.2210.26.29.23
3610.26.29.24/2910.26.29.25 – 10.26.29.3010.26.29.31
3710.26.29.32/2910.26.29.33 – 10.26.29.3810.26.29.39
3810.26.29.40/2910.26.29.41 – 10.26.29.4610.26.29.47
3910.26.29.48/2910.26.29.49 – 10.26.29.5410.26.29.55
4010.26.29.56/2910.26.29.57 – 10.26.29.6210.26.29.63
4110.26.29.64/2910.26.29.65 – 10.26.29.7010.26.29.71
4210.26.29.72/2910.26.29.73 – 10.26.29.7810.26.29.79
4310.26.29.80/2910.26.29.81 – 10.26.29.8610.26.29.87
4410.26.29.88/2910.26.29.89 – 10.26.29.9410.26.29.95
4510.26.29.96/2910.26.29.97 – 10.26.29.10210.26.29.103
4610.26.29.104/2910.26.29.105 – 10.26.29.11010.26.29.111
4710.26.29.112/2910.26.29.113 – 10.26.29.11810.26.29.119
4810.26.29.120/2910.26.29.121 – 10.26.29.12610.26.29.127
4910.26.29.128/2910.26.29.129 – 10.26.29.13410.26.29.135
5010.26.29.136/2910.26.29.137 – 10.26.29.14210.26.29.143
5110.26.29.144/2910.26.29.145 – 10.26.29.15010.26.29.151
5210.26.29.152/2910.26.29.153 – 10.26.29.15810.26.29.159
5310.26.29.160/2910.26.29.161 – 10.26.29.16610.26.29.167
5410.26.29.168/2910.26.29.169 – 10.26.29.17410.26.29.175
5510.26.29.176/2910.26.29.177 – 10.26.29.18210.26.29.183
5610.26.29.184/2910.26.29.185 – 10.26.29.19010.26.29.191
5710.26.29.192/2910.26.29.193 – 10.26.29.19810.26.29.199
5810.26.29.200/2910.26.29.201 – 10.26.29.20610.26.29.207
5910.26.29.208/2910.26.29.209 – 10.26.29.21410.26.29.215
6010.26.29.216/2910.26.29.217 – 10.26.29.22210.26.29.223
6110.26.29.224/2910.26.29.225 – 10.26.29.23010.26.29.231
6210.26.29.232/2910.26.29.233 – 10.26.29.23810.26.29.239
6310.26.29.240/2910.26.29.241 – 10.26.29.24610.26.29.247
6410.26.29.248/2910.26.29.249 – 10.26.29.25410.26.29.255
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 →