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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)10.92.0.0/15
network10.92.0.0/15
broadcast10.93.255.255
first host10.92.0.1
last host10.93.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.92.0.0/15
address00001010.01011100.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.01011100.00000000.00000000
broadcast00001010.01011101.11111111.11111111
green = network part, grey = host part
hex0x0a5c0000
decimal173801472
reverse dns0.0.92.10.in-addr.arpa
ipv4-mapped::ffff:a5c:0

/15 split into /21 · 64 subnets

close ×
#networkhost rangebroadcast
110.92.0.0/2110.92.0.1 – 10.92.7.25410.92.7.255
210.92.8.0/2110.92.8.1 – 10.92.15.25410.92.15.255
310.92.16.0/2110.92.16.1 – 10.92.23.25410.92.23.255
410.92.24.0/2110.92.24.1 – 10.92.31.25410.92.31.255
510.92.32.0/2110.92.32.1 – 10.92.39.25410.92.39.255
610.92.40.0/2110.92.40.1 – 10.92.47.25410.92.47.255
710.92.48.0/2110.92.48.1 – 10.92.55.25410.92.55.255
810.92.56.0/2110.92.56.1 – 10.92.63.25410.92.63.255
910.92.64.0/2110.92.64.1 – 10.92.71.25410.92.71.255
1010.92.72.0/2110.92.72.1 – 10.92.79.25410.92.79.255
1110.92.80.0/2110.92.80.1 – 10.92.87.25410.92.87.255
1210.92.88.0/2110.92.88.1 – 10.92.95.25410.92.95.255
1310.92.96.0/2110.92.96.1 – 10.92.103.25410.92.103.255
1410.92.104.0/2110.92.104.1 – 10.92.111.25410.92.111.255
1510.92.112.0/2110.92.112.1 – 10.92.119.25410.92.119.255
1610.92.120.0/2110.92.120.1 – 10.92.127.25410.92.127.255
1710.92.128.0/2110.92.128.1 – 10.92.135.25410.92.135.255
1810.92.136.0/2110.92.136.1 – 10.92.143.25410.92.143.255
1910.92.144.0/2110.92.144.1 – 10.92.151.25410.92.151.255
2010.92.152.0/2110.92.152.1 – 10.92.159.25410.92.159.255
2110.92.160.0/2110.92.160.1 – 10.92.167.25410.92.167.255
2210.92.168.0/2110.92.168.1 – 10.92.175.25410.92.175.255
2310.92.176.0/2110.92.176.1 – 10.92.183.25410.92.183.255
2410.92.184.0/2110.92.184.1 – 10.92.191.25410.92.191.255
2510.92.192.0/2110.92.192.1 – 10.92.199.25410.92.199.255
2610.92.200.0/2110.92.200.1 – 10.92.207.25410.92.207.255
2710.92.208.0/2110.92.208.1 – 10.92.215.25410.92.215.255
2810.92.216.0/2110.92.216.1 – 10.92.223.25410.92.223.255
2910.92.224.0/2110.92.224.1 – 10.92.231.25410.92.231.255
3010.92.232.0/2110.92.232.1 – 10.92.239.25410.92.239.255
3110.92.240.0/2110.92.240.1 – 10.92.247.25410.92.247.255
3210.92.248.0/2110.92.248.1 – 10.92.255.25410.92.255.255
3310.93.0.0/2110.93.0.1 – 10.93.7.25410.93.7.255
3410.93.8.0/2110.93.8.1 – 10.93.15.25410.93.15.255
3510.93.16.0/2110.93.16.1 – 10.93.23.25410.93.23.255
3610.93.24.0/2110.93.24.1 – 10.93.31.25410.93.31.255
3710.93.32.0/2110.93.32.1 – 10.93.39.25410.93.39.255
3810.93.40.0/2110.93.40.1 – 10.93.47.25410.93.47.255
3910.93.48.0/2110.93.48.1 – 10.93.55.25410.93.55.255
4010.93.56.0/2110.93.56.1 – 10.93.63.25410.93.63.255
4110.93.64.0/2110.93.64.1 – 10.93.71.25410.93.71.255
4210.93.72.0/2110.93.72.1 – 10.93.79.25410.93.79.255
4310.93.80.0/2110.93.80.1 – 10.93.87.25410.93.87.255
4410.93.88.0/2110.93.88.1 – 10.93.95.25410.93.95.255
4510.93.96.0/2110.93.96.1 – 10.93.103.25410.93.103.255
4610.93.104.0/2110.93.104.1 – 10.93.111.25410.93.111.255
4710.93.112.0/2110.93.112.1 – 10.93.119.25410.93.119.255
4810.93.120.0/2110.93.120.1 – 10.93.127.25410.93.127.255
4910.93.128.0/2110.93.128.1 – 10.93.135.25410.93.135.255
5010.93.136.0/2110.93.136.1 – 10.93.143.25410.93.143.255
5110.93.144.0/2110.93.144.1 – 10.93.151.25410.93.151.255
5210.93.152.0/2110.93.152.1 – 10.93.159.25410.93.159.255
5310.93.160.0/2110.93.160.1 – 10.93.167.25410.93.167.255
5410.93.168.0/2110.93.168.1 – 10.93.175.25410.93.175.255
5510.93.176.0/2110.93.176.1 – 10.93.183.25410.93.183.255
5610.93.184.0/2110.93.184.1 – 10.93.191.25410.93.191.255
5710.93.192.0/2110.93.192.1 – 10.93.199.25410.93.199.255
5810.93.200.0/2110.93.200.1 – 10.93.207.25410.93.207.255
5910.93.208.0/2110.93.208.1 – 10.93.215.25410.93.215.255
6010.93.216.0/2110.93.216.1 – 10.93.223.25410.93.223.255
6110.93.224.0/2110.93.224.1 – 10.93.231.25410.93.231.255
6210.93.232.0/2110.93.232.1 – 10.93.239.25410.93.239.255
6310.93.240.0/2110.93.240.1 – 10.93.247.25410.93.247.255
6410.93.248.0/2110.93.248.1 – 10.93.255.25410.93.255.255
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 →