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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)10.46.0.0/19
network10.46.0.0/19
broadcast10.46.31.255
first host10.46.0.1
last host10.46.31.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.46.0.0/19
address00001010.00101110.00000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00101110.00000000.00000000
broadcast00001010.00101110.00011111.11111111
green = network part, grey = host part
hex0x0a2e0000
decimal170786816
reverse dns0.0.46.10.in-addr.arpa
ipv4-mapped::ffff:a2e:0

/19 split into /25 · 64 subnets

close ×
#networkhost rangebroadcast
110.46.0.0/2510.46.0.1 – 10.46.0.12610.46.0.127
210.46.0.128/2510.46.0.129 – 10.46.0.25410.46.0.255
310.46.1.0/2510.46.1.1 – 10.46.1.12610.46.1.127
410.46.1.128/2510.46.1.129 – 10.46.1.25410.46.1.255
510.46.2.0/2510.46.2.1 – 10.46.2.12610.46.2.127
610.46.2.128/2510.46.2.129 – 10.46.2.25410.46.2.255
710.46.3.0/2510.46.3.1 – 10.46.3.12610.46.3.127
810.46.3.128/2510.46.3.129 – 10.46.3.25410.46.3.255
910.46.4.0/2510.46.4.1 – 10.46.4.12610.46.4.127
1010.46.4.128/2510.46.4.129 – 10.46.4.25410.46.4.255
1110.46.5.0/2510.46.5.1 – 10.46.5.12610.46.5.127
1210.46.5.128/2510.46.5.129 – 10.46.5.25410.46.5.255
1310.46.6.0/2510.46.6.1 – 10.46.6.12610.46.6.127
1410.46.6.128/2510.46.6.129 – 10.46.6.25410.46.6.255
1510.46.7.0/2510.46.7.1 – 10.46.7.12610.46.7.127
1610.46.7.128/2510.46.7.129 – 10.46.7.25410.46.7.255
1710.46.8.0/2510.46.8.1 – 10.46.8.12610.46.8.127
1810.46.8.128/2510.46.8.129 – 10.46.8.25410.46.8.255
1910.46.9.0/2510.46.9.1 – 10.46.9.12610.46.9.127
2010.46.9.128/2510.46.9.129 – 10.46.9.25410.46.9.255
2110.46.10.0/2510.46.10.1 – 10.46.10.12610.46.10.127
2210.46.10.128/2510.46.10.129 – 10.46.10.25410.46.10.255
2310.46.11.0/2510.46.11.1 – 10.46.11.12610.46.11.127
2410.46.11.128/2510.46.11.129 – 10.46.11.25410.46.11.255
2510.46.12.0/2510.46.12.1 – 10.46.12.12610.46.12.127
2610.46.12.128/2510.46.12.129 – 10.46.12.25410.46.12.255
2710.46.13.0/2510.46.13.1 – 10.46.13.12610.46.13.127
2810.46.13.128/2510.46.13.129 – 10.46.13.25410.46.13.255
2910.46.14.0/2510.46.14.1 – 10.46.14.12610.46.14.127
3010.46.14.128/2510.46.14.129 – 10.46.14.25410.46.14.255
3110.46.15.0/2510.46.15.1 – 10.46.15.12610.46.15.127
3210.46.15.128/2510.46.15.129 – 10.46.15.25410.46.15.255
3310.46.16.0/2510.46.16.1 – 10.46.16.12610.46.16.127
3410.46.16.128/2510.46.16.129 – 10.46.16.25410.46.16.255
3510.46.17.0/2510.46.17.1 – 10.46.17.12610.46.17.127
3610.46.17.128/2510.46.17.129 – 10.46.17.25410.46.17.255
3710.46.18.0/2510.46.18.1 – 10.46.18.12610.46.18.127
3810.46.18.128/2510.46.18.129 – 10.46.18.25410.46.18.255
3910.46.19.0/2510.46.19.1 – 10.46.19.12610.46.19.127
4010.46.19.128/2510.46.19.129 – 10.46.19.25410.46.19.255
4110.46.20.0/2510.46.20.1 – 10.46.20.12610.46.20.127
4210.46.20.128/2510.46.20.129 – 10.46.20.25410.46.20.255
4310.46.21.0/2510.46.21.1 – 10.46.21.12610.46.21.127
4410.46.21.128/2510.46.21.129 – 10.46.21.25410.46.21.255
4510.46.22.0/2510.46.22.1 – 10.46.22.12610.46.22.127
4610.46.22.128/2510.46.22.129 – 10.46.22.25410.46.22.255
4710.46.23.0/2510.46.23.1 – 10.46.23.12610.46.23.127
4810.46.23.128/2510.46.23.129 – 10.46.23.25410.46.23.255
4910.46.24.0/2510.46.24.1 – 10.46.24.12610.46.24.127
5010.46.24.128/2510.46.24.129 – 10.46.24.25410.46.24.255
5110.46.25.0/2510.46.25.1 – 10.46.25.12610.46.25.127
5210.46.25.128/2510.46.25.129 – 10.46.25.25410.46.25.255
5310.46.26.0/2510.46.26.1 – 10.46.26.12610.46.26.127
5410.46.26.128/2510.46.26.129 – 10.46.26.25410.46.26.255
5510.46.27.0/2510.46.27.1 – 10.46.27.12610.46.27.127
5610.46.27.128/2510.46.27.129 – 10.46.27.25410.46.27.255
5710.46.28.0/2510.46.28.1 – 10.46.28.12610.46.28.127
5810.46.28.128/2510.46.28.129 – 10.46.28.25410.46.28.255
5910.46.29.0/2510.46.29.1 – 10.46.29.12610.46.29.127
6010.46.29.128/2510.46.29.129 – 10.46.29.25410.46.29.255
6110.46.30.0/2510.46.30.1 – 10.46.30.12610.46.30.127
6210.46.30.128/2510.46.30.129 – 10.46.30.25410.46.30.255
6310.46.31.0/2510.46.31.1 – 10.46.31.12610.46.31.127
6410.46.31.128/2510.46.31.129 – 10.46.31.25410.46.31.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /19
/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-
/19255.255.224.08,1928,1901
/20255.255.240.04,0964,0942 split →
/21255.255.248.02,0482,0464 split →
/22255.255.252.01,0241,0228 split →
/23255.255.254.051251016 split →
/24255.255.255.025625432 split →
/25255.255.255.12812812664 split →
/26255.255.255.1926462128 split →
/27255.255.255.2243230256 split →
/28255.255.255.2401614512 split →
/29255.255.255.248861,024 split →
/30255.255.255.252422,048 split →
/31255.255.255.254224,096 split →
/32255.255.255.255118,192 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 →