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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)10.167.194.0/23
network10.167.194.0/23
broadcast10.167.195.255
first host10.167.194.1
last host10.167.195.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.167.194.0/23
address00001010.10100111.11000010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100111.11000010.00000000
broadcast00001010.10100111.11000011.11111111
green = network part, grey = host part
hex0x0aa7c200
decimal178766336
reverse dns0.194.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:c200

/23 split into /28 · 32 subnets

close ×
#networkhost rangebroadcast
110.167.194.0/2810.167.194.1 – 10.167.194.1410.167.194.15
210.167.194.16/2810.167.194.17 – 10.167.194.3010.167.194.31
310.167.194.32/2810.167.194.33 – 10.167.194.4610.167.194.47
410.167.194.48/2810.167.194.49 – 10.167.194.6210.167.194.63
510.167.194.64/2810.167.194.65 – 10.167.194.7810.167.194.79
610.167.194.80/2810.167.194.81 – 10.167.194.9410.167.194.95
710.167.194.96/2810.167.194.97 – 10.167.194.11010.167.194.111
810.167.194.112/2810.167.194.113 – 10.167.194.12610.167.194.127
910.167.194.128/2810.167.194.129 – 10.167.194.14210.167.194.143
1010.167.194.144/2810.167.194.145 – 10.167.194.15810.167.194.159
1110.167.194.160/2810.167.194.161 – 10.167.194.17410.167.194.175
1210.167.194.176/2810.167.194.177 – 10.167.194.19010.167.194.191
1310.167.194.192/2810.167.194.193 – 10.167.194.20610.167.194.207
1410.167.194.208/2810.167.194.209 – 10.167.194.22210.167.194.223
1510.167.194.224/2810.167.194.225 – 10.167.194.23810.167.194.239
1610.167.194.240/2810.167.194.241 – 10.167.194.25410.167.194.255
1710.167.195.0/2810.167.195.1 – 10.167.195.1410.167.195.15
1810.167.195.16/2810.167.195.17 – 10.167.195.3010.167.195.31
1910.167.195.32/2810.167.195.33 – 10.167.195.4610.167.195.47
2010.167.195.48/2810.167.195.49 – 10.167.195.6210.167.195.63
2110.167.195.64/2810.167.195.65 – 10.167.195.7810.167.195.79
2210.167.195.80/2810.167.195.81 – 10.167.195.9410.167.195.95
2310.167.195.96/2810.167.195.97 – 10.167.195.11010.167.195.111
2410.167.195.112/2810.167.195.113 – 10.167.195.12610.167.195.127
2510.167.195.128/2810.167.195.129 – 10.167.195.14210.167.195.143
2610.167.195.144/2810.167.195.145 – 10.167.195.15810.167.195.159
2710.167.195.160/2810.167.195.161 – 10.167.195.17410.167.195.175
2810.167.195.176/2810.167.195.177 – 10.167.195.19010.167.195.191
2910.167.195.192/2810.167.195.193 – 10.167.195.20610.167.195.207
3010.167.195.208/2810.167.195.209 – 10.167.195.22210.167.195.223
3110.167.195.224/2810.167.195.225 – 10.167.195.23810.167.195.239
3210.167.195.240/2810.167.195.241 – 10.167.195.25410.167.195.255
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 →