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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)10.96.0.0/15
network10.96.0.0/15
broadcast10.97.255.255
first host10.96.0.1
last host10.97.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.96.0.0/15
address00001010.01100000.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.01100000.00000000.00000000
broadcast00001010.01100001.11111111.11111111
green = network part, grey = host part
hex0x0a600000
decimal174063616
reverse dns0.0.96.10.in-addr.arpa
ipv4-mapped::ffff:a60:0

/15 split into /21 · 64 subnets

close ×
#networkhost rangebroadcast
110.96.0.0/2110.96.0.1 – 10.96.7.25410.96.7.255
210.96.8.0/2110.96.8.1 – 10.96.15.25410.96.15.255
310.96.16.0/2110.96.16.1 – 10.96.23.25410.96.23.255
410.96.24.0/2110.96.24.1 – 10.96.31.25410.96.31.255
510.96.32.0/2110.96.32.1 – 10.96.39.25410.96.39.255
610.96.40.0/2110.96.40.1 – 10.96.47.25410.96.47.255
710.96.48.0/2110.96.48.1 – 10.96.55.25410.96.55.255
810.96.56.0/2110.96.56.1 – 10.96.63.25410.96.63.255
910.96.64.0/2110.96.64.1 – 10.96.71.25410.96.71.255
1010.96.72.0/2110.96.72.1 – 10.96.79.25410.96.79.255
1110.96.80.0/2110.96.80.1 – 10.96.87.25410.96.87.255
1210.96.88.0/2110.96.88.1 – 10.96.95.25410.96.95.255
1310.96.96.0/2110.96.96.1 – 10.96.103.25410.96.103.255
1410.96.104.0/2110.96.104.1 – 10.96.111.25410.96.111.255
1510.96.112.0/2110.96.112.1 – 10.96.119.25410.96.119.255
1610.96.120.0/2110.96.120.1 – 10.96.127.25410.96.127.255
1710.96.128.0/2110.96.128.1 – 10.96.135.25410.96.135.255
1810.96.136.0/2110.96.136.1 – 10.96.143.25410.96.143.255
1910.96.144.0/2110.96.144.1 – 10.96.151.25410.96.151.255
2010.96.152.0/2110.96.152.1 – 10.96.159.25410.96.159.255
2110.96.160.0/2110.96.160.1 – 10.96.167.25410.96.167.255
2210.96.168.0/2110.96.168.1 – 10.96.175.25410.96.175.255
2310.96.176.0/2110.96.176.1 – 10.96.183.25410.96.183.255
2410.96.184.0/2110.96.184.1 – 10.96.191.25410.96.191.255
2510.96.192.0/2110.96.192.1 – 10.96.199.25410.96.199.255
2610.96.200.0/2110.96.200.1 – 10.96.207.25410.96.207.255
2710.96.208.0/2110.96.208.1 – 10.96.215.25410.96.215.255
2810.96.216.0/2110.96.216.1 – 10.96.223.25410.96.223.255
2910.96.224.0/2110.96.224.1 – 10.96.231.25410.96.231.255
3010.96.232.0/2110.96.232.1 – 10.96.239.25410.96.239.255
3110.96.240.0/2110.96.240.1 – 10.96.247.25410.96.247.255
3210.96.248.0/2110.96.248.1 – 10.96.255.25410.96.255.255
3310.97.0.0/2110.97.0.1 – 10.97.7.25410.97.7.255
3410.97.8.0/2110.97.8.1 – 10.97.15.25410.97.15.255
3510.97.16.0/2110.97.16.1 – 10.97.23.25410.97.23.255
3610.97.24.0/2110.97.24.1 – 10.97.31.25410.97.31.255
3710.97.32.0/2110.97.32.1 – 10.97.39.25410.97.39.255
3810.97.40.0/2110.97.40.1 – 10.97.47.25410.97.47.255
3910.97.48.0/2110.97.48.1 – 10.97.55.25410.97.55.255
4010.97.56.0/2110.97.56.1 – 10.97.63.25410.97.63.255
4110.97.64.0/2110.97.64.1 – 10.97.71.25410.97.71.255
4210.97.72.0/2110.97.72.1 – 10.97.79.25410.97.79.255
4310.97.80.0/2110.97.80.1 – 10.97.87.25410.97.87.255
4410.97.88.0/2110.97.88.1 – 10.97.95.25410.97.95.255
4510.97.96.0/2110.97.96.1 – 10.97.103.25410.97.103.255
4610.97.104.0/2110.97.104.1 – 10.97.111.25410.97.111.255
4710.97.112.0/2110.97.112.1 – 10.97.119.25410.97.119.255
4810.97.120.0/2110.97.120.1 – 10.97.127.25410.97.127.255
4910.97.128.0/2110.97.128.1 – 10.97.135.25410.97.135.255
5010.97.136.0/2110.97.136.1 – 10.97.143.25410.97.143.255
5110.97.144.0/2110.97.144.1 – 10.97.151.25410.97.151.255
5210.97.152.0/2110.97.152.1 – 10.97.159.25410.97.159.255
5310.97.160.0/2110.97.160.1 – 10.97.167.25410.97.167.255
5410.97.168.0/2110.97.168.1 – 10.97.175.25410.97.175.255
5510.97.176.0/2110.97.176.1 – 10.97.183.25410.97.183.255
5610.97.184.0/2110.97.184.1 – 10.97.191.25410.97.191.255
5710.97.192.0/2110.97.192.1 – 10.97.199.25410.97.199.255
5810.97.200.0/2110.97.200.1 – 10.97.207.25410.97.207.255
5910.97.208.0/2110.97.208.1 – 10.97.215.25410.97.215.255
6010.97.216.0/2110.97.216.1 – 10.97.223.25410.97.223.255
6110.97.224.0/2110.97.224.1 – 10.97.231.25410.97.231.255
6210.97.232.0/2110.97.232.1 – 10.97.239.25410.97.239.255
6310.97.240.0/2110.97.240.1 – 10.97.247.25410.97.247.255
6410.97.248.0/2110.97.248.1 – 10.97.255.25410.97.255.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /15
/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-
/15255.254.0.0131,072131,0701
/16255.255.0.065,53665,5342 split →
/17255.255.128.032,76832,7664 split →
/18255.255.192.016,38416,3828 split →
/19255.255.224.08,1928,19016 split →
/20255.255.240.04,0964,09432 split →
/21255.255.248.02,0482,04664 split →
/22255.255.252.01,0241,022128 split →
/23255.255.254.0512510256 split →
/24255.255.255.0256254512 split →
/25255.255.255.1281281261,024 split →
/26255.255.255.19264622,048 split →
/27255.255.255.22432304,096 split →
/28255.255.255.24016148,192 split →
/29255.255.255.2488616,384 split →
/30255.255.255.2524232,768 split →
/31255.255.255.2542265,536 split →
/32255.255.255.25511131,072 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 →