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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)10.152.0.0/16
network10.152.0.0/16
broadcast10.152.255.255
first host10.152.0.1
last host10.152.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.152.0.0/16
address00001010.10011000.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.10011000.00000000.00000000
broadcast00001010.10011000.11111111.11111111
green = network part, grey = host part
hex0x0a980000
decimal177733632
reverse dns0.0.152.10.in-addr.arpa
ipv4-mapped::ffff:a98:0

/16 split into /22 · 64 subnets

close ×
#networkhost rangebroadcast
110.152.0.0/2210.152.0.1 – 10.152.3.25410.152.3.255
210.152.4.0/2210.152.4.1 – 10.152.7.25410.152.7.255
310.152.8.0/2210.152.8.1 – 10.152.11.25410.152.11.255
410.152.12.0/2210.152.12.1 – 10.152.15.25410.152.15.255
510.152.16.0/2210.152.16.1 – 10.152.19.25410.152.19.255
610.152.20.0/2210.152.20.1 – 10.152.23.25410.152.23.255
710.152.24.0/2210.152.24.1 – 10.152.27.25410.152.27.255
810.152.28.0/2210.152.28.1 – 10.152.31.25410.152.31.255
910.152.32.0/2210.152.32.1 – 10.152.35.25410.152.35.255
1010.152.36.0/2210.152.36.1 – 10.152.39.25410.152.39.255
1110.152.40.0/2210.152.40.1 – 10.152.43.25410.152.43.255
1210.152.44.0/2210.152.44.1 – 10.152.47.25410.152.47.255
1310.152.48.0/2210.152.48.1 – 10.152.51.25410.152.51.255
1410.152.52.0/2210.152.52.1 – 10.152.55.25410.152.55.255
1510.152.56.0/2210.152.56.1 – 10.152.59.25410.152.59.255
1610.152.60.0/2210.152.60.1 – 10.152.63.25410.152.63.255
1710.152.64.0/2210.152.64.1 – 10.152.67.25410.152.67.255
1810.152.68.0/2210.152.68.1 – 10.152.71.25410.152.71.255
1910.152.72.0/2210.152.72.1 – 10.152.75.25410.152.75.255
2010.152.76.0/2210.152.76.1 – 10.152.79.25410.152.79.255
2110.152.80.0/2210.152.80.1 – 10.152.83.25410.152.83.255
2210.152.84.0/2210.152.84.1 – 10.152.87.25410.152.87.255
2310.152.88.0/2210.152.88.1 – 10.152.91.25410.152.91.255
2410.152.92.0/2210.152.92.1 – 10.152.95.25410.152.95.255
2510.152.96.0/2210.152.96.1 – 10.152.99.25410.152.99.255
2610.152.100.0/2210.152.100.1 – 10.152.103.25410.152.103.255
2710.152.104.0/2210.152.104.1 – 10.152.107.25410.152.107.255
2810.152.108.0/2210.152.108.1 – 10.152.111.25410.152.111.255
2910.152.112.0/2210.152.112.1 – 10.152.115.25410.152.115.255
3010.152.116.0/2210.152.116.1 – 10.152.119.25410.152.119.255
3110.152.120.0/2210.152.120.1 – 10.152.123.25410.152.123.255
3210.152.124.0/2210.152.124.1 – 10.152.127.25410.152.127.255
3310.152.128.0/2210.152.128.1 – 10.152.131.25410.152.131.255
3410.152.132.0/2210.152.132.1 – 10.152.135.25410.152.135.255
3510.152.136.0/2210.152.136.1 – 10.152.139.25410.152.139.255
3610.152.140.0/2210.152.140.1 – 10.152.143.25410.152.143.255
3710.152.144.0/2210.152.144.1 – 10.152.147.25410.152.147.255
3810.152.148.0/2210.152.148.1 – 10.152.151.25410.152.151.255
3910.152.152.0/2210.152.152.1 – 10.152.155.25410.152.155.255
4010.152.156.0/2210.152.156.1 – 10.152.159.25410.152.159.255
4110.152.160.0/2210.152.160.1 – 10.152.163.25410.152.163.255
4210.152.164.0/2210.152.164.1 – 10.152.167.25410.152.167.255
4310.152.168.0/2210.152.168.1 – 10.152.171.25410.152.171.255
4410.152.172.0/2210.152.172.1 – 10.152.175.25410.152.175.255
4510.152.176.0/2210.152.176.1 – 10.152.179.25410.152.179.255
4610.152.180.0/2210.152.180.1 – 10.152.183.25410.152.183.255
4710.152.184.0/2210.152.184.1 – 10.152.187.25410.152.187.255
4810.152.188.0/2210.152.188.1 – 10.152.191.25410.152.191.255
4910.152.192.0/2210.152.192.1 – 10.152.195.25410.152.195.255
5010.152.196.0/2210.152.196.1 – 10.152.199.25410.152.199.255
5110.152.200.0/2210.152.200.1 – 10.152.203.25410.152.203.255
5210.152.204.0/2210.152.204.1 – 10.152.207.25410.152.207.255
5310.152.208.0/2210.152.208.1 – 10.152.211.25410.152.211.255
5410.152.212.0/2210.152.212.1 – 10.152.215.25410.152.215.255
5510.152.216.0/2210.152.216.1 – 10.152.219.25410.152.219.255
5610.152.220.0/2210.152.220.1 – 10.152.223.25410.152.223.255
5710.152.224.0/2210.152.224.1 – 10.152.227.25410.152.227.255
5810.152.228.0/2210.152.228.1 – 10.152.231.25410.152.231.255
5910.152.232.0/2210.152.232.1 – 10.152.235.25410.152.235.255
6010.152.236.0/2210.152.236.1 – 10.152.239.25410.152.239.255
6110.152.240.0/2210.152.240.1 – 10.152.243.25410.152.243.255
6210.152.244.0/2210.152.244.1 – 10.152.247.25410.152.247.255
6310.152.248.0/2210.152.248.1 – 10.152.251.25410.152.251.255
6410.152.252.0/2210.152.252.1 – 10.152.255.25410.152.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /16
/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-
/16255.255.0.065,53665,5341
/17255.255.128.032,76832,7662 split →
/18255.255.192.016,38416,3824 split →
/19255.255.224.08,1928,1908 split →
/20255.255.240.04,0964,09416 split →
/21255.255.248.02,0482,04632 split →
/22255.255.252.01,0241,02264 split →
/23255.255.254.0512510128 split →
/24255.255.255.0256254256 split →
/25255.255.255.128128126512 split →
/26255.255.255.19264621,024 split →
/27255.255.255.22432302,048 split →
/28255.255.255.24016144,096 split →
/29255.255.255.248868,192 split →
/30255.255.255.2524216,384 split →
/31255.255.255.2542232,768 split →
/32255.255.255.2551165,536 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 →