ip
ipku.in

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)10.44.0.0/18
network10.44.0.0/18
broadcast10.44.63.255
first host10.44.0.1
last host10.44.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.44.0.0/18
address00001010.00101100.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00101100.00000000.00000000
broadcast00001010.00101100.00111111.11111111
green = network part, grey = host part
hex0x0a2c0000
decimal170655744
reverse dns0.0.44.10.in-addr.arpa
ipv4-mapped::ffff:a2c:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.44.0.0/2510.44.0.1 – 10.44.0.12610.44.0.127
210.44.0.128/2510.44.0.129 – 10.44.0.25410.44.0.255
310.44.1.0/2510.44.1.1 – 10.44.1.12610.44.1.127
410.44.1.128/2510.44.1.129 – 10.44.1.25410.44.1.255
510.44.2.0/2510.44.2.1 – 10.44.2.12610.44.2.127
610.44.2.128/2510.44.2.129 – 10.44.2.25410.44.2.255
710.44.3.0/2510.44.3.1 – 10.44.3.12610.44.3.127
810.44.3.128/2510.44.3.129 – 10.44.3.25410.44.3.255
910.44.4.0/2510.44.4.1 – 10.44.4.12610.44.4.127
1010.44.4.128/2510.44.4.129 – 10.44.4.25410.44.4.255
1110.44.5.0/2510.44.5.1 – 10.44.5.12610.44.5.127
1210.44.5.128/2510.44.5.129 – 10.44.5.25410.44.5.255
1310.44.6.0/2510.44.6.1 – 10.44.6.12610.44.6.127
1410.44.6.128/2510.44.6.129 – 10.44.6.25410.44.6.255
1510.44.7.0/2510.44.7.1 – 10.44.7.12610.44.7.127
1610.44.7.128/2510.44.7.129 – 10.44.7.25410.44.7.255
1710.44.8.0/2510.44.8.1 – 10.44.8.12610.44.8.127
1810.44.8.128/2510.44.8.129 – 10.44.8.25410.44.8.255
1910.44.9.0/2510.44.9.1 – 10.44.9.12610.44.9.127
2010.44.9.128/2510.44.9.129 – 10.44.9.25410.44.9.255
2110.44.10.0/2510.44.10.1 – 10.44.10.12610.44.10.127
2210.44.10.128/2510.44.10.129 – 10.44.10.25410.44.10.255
2310.44.11.0/2510.44.11.1 – 10.44.11.12610.44.11.127
2410.44.11.128/2510.44.11.129 – 10.44.11.25410.44.11.255
2510.44.12.0/2510.44.12.1 – 10.44.12.12610.44.12.127
2610.44.12.128/2510.44.12.129 – 10.44.12.25410.44.12.255
2710.44.13.0/2510.44.13.1 – 10.44.13.12610.44.13.127
2810.44.13.128/2510.44.13.129 – 10.44.13.25410.44.13.255
2910.44.14.0/2510.44.14.1 – 10.44.14.12610.44.14.127
3010.44.14.128/2510.44.14.129 – 10.44.14.25410.44.14.255
3110.44.15.0/2510.44.15.1 – 10.44.15.12610.44.15.127
3210.44.15.128/2510.44.15.129 – 10.44.15.25410.44.15.255
3310.44.16.0/2510.44.16.1 – 10.44.16.12610.44.16.127
3410.44.16.128/2510.44.16.129 – 10.44.16.25410.44.16.255
3510.44.17.0/2510.44.17.1 – 10.44.17.12610.44.17.127
3610.44.17.128/2510.44.17.129 – 10.44.17.25410.44.17.255
3710.44.18.0/2510.44.18.1 – 10.44.18.12610.44.18.127
3810.44.18.128/2510.44.18.129 – 10.44.18.25410.44.18.255
3910.44.19.0/2510.44.19.1 – 10.44.19.12610.44.19.127
4010.44.19.128/2510.44.19.129 – 10.44.19.25410.44.19.255
4110.44.20.0/2510.44.20.1 – 10.44.20.12610.44.20.127
4210.44.20.128/2510.44.20.129 – 10.44.20.25410.44.20.255
4310.44.21.0/2510.44.21.1 – 10.44.21.12610.44.21.127
4410.44.21.128/2510.44.21.129 – 10.44.21.25410.44.21.255
4510.44.22.0/2510.44.22.1 – 10.44.22.12610.44.22.127
4610.44.22.128/2510.44.22.129 – 10.44.22.25410.44.22.255
4710.44.23.0/2510.44.23.1 – 10.44.23.12610.44.23.127
4810.44.23.128/2510.44.23.129 – 10.44.23.25410.44.23.255
4910.44.24.0/2510.44.24.1 – 10.44.24.12610.44.24.127
5010.44.24.128/2510.44.24.129 – 10.44.24.25410.44.24.255
5110.44.25.0/2510.44.25.1 – 10.44.25.12610.44.25.127
5210.44.25.128/2510.44.25.129 – 10.44.25.25410.44.25.255
5310.44.26.0/2510.44.26.1 – 10.44.26.12610.44.26.127
5410.44.26.128/2510.44.26.129 – 10.44.26.25410.44.26.255
5510.44.27.0/2510.44.27.1 – 10.44.27.12610.44.27.127
5610.44.27.128/2510.44.27.129 – 10.44.27.25410.44.27.255
5710.44.28.0/2510.44.28.1 – 10.44.28.12610.44.28.127
5810.44.28.128/2510.44.28.129 – 10.44.28.25410.44.28.255
5910.44.29.0/2510.44.29.1 – 10.44.29.12610.44.29.127
6010.44.29.128/2510.44.29.129 – 10.44.29.25410.44.29.255
6110.44.30.0/2510.44.30.1 – 10.44.30.12610.44.30.127
6210.44.30.128/2510.44.30.129 – 10.44.30.25410.44.30.255
6310.44.31.0/2510.44.31.1 – 10.44.31.12610.44.31.127
6410.44.31.128/2510.44.31.129 – 10.44.31.25410.44.31.255
6510.44.32.0/2510.44.32.1 – 10.44.32.12610.44.32.127
6610.44.32.128/2510.44.32.129 – 10.44.32.25410.44.32.255
6710.44.33.0/2510.44.33.1 – 10.44.33.12610.44.33.127
6810.44.33.128/2510.44.33.129 – 10.44.33.25410.44.33.255
6910.44.34.0/2510.44.34.1 – 10.44.34.12610.44.34.127
7010.44.34.128/2510.44.34.129 – 10.44.34.25410.44.34.255
7110.44.35.0/2510.44.35.1 – 10.44.35.12610.44.35.127
7210.44.35.128/2510.44.35.129 – 10.44.35.25410.44.35.255
7310.44.36.0/2510.44.36.1 – 10.44.36.12610.44.36.127
7410.44.36.128/2510.44.36.129 – 10.44.36.25410.44.36.255
7510.44.37.0/2510.44.37.1 – 10.44.37.12610.44.37.127
7610.44.37.128/2510.44.37.129 – 10.44.37.25410.44.37.255
7710.44.38.0/2510.44.38.1 – 10.44.38.12610.44.38.127
7810.44.38.128/2510.44.38.129 – 10.44.38.25410.44.38.255
7910.44.39.0/2510.44.39.1 – 10.44.39.12610.44.39.127
8010.44.39.128/2510.44.39.129 – 10.44.39.25410.44.39.255
8110.44.40.0/2510.44.40.1 – 10.44.40.12610.44.40.127
8210.44.40.128/2510.44.40.129 – 10.44.40.25410.44.40.255
8310.44.41.0/2510.44.41.1 – 10.44.41.12610.44.41.127
8410.44.41.128/2510.44.41.129 – 10.44.41.25410.44.41.255
8510.44.42.0/2510.44.42.1 – 10.44.42.12610.44.42.127
8610.44.42.128/2510.44.42.129 – 10.44.42.25410.44.42.255
8710.44.43.0/2510.44.43.1 – 10.44.43.12610.44.43.127
8810.44.43.128/2510.44.43.129 – 10.44.43.25410.44.43.255
8910.44.44.0/2510.44.44.1 – 10.44.44.12610.44.44.127
9010.44.44.128/2510.44.44.129 – 10.44.44.25410.44.44.255
9110.44.45.0/2510.44.45.1 – 10.44.45.12610.44.45.127
9210.44.45.128/2510.44.45.129 – 10.44.45.25410.44.45.255
9310.44.46.0/2510.44.46.1 – 10.44.46.12610.44.46.127
9410.44.46.128/2510.44.46.129 – 10.44.46.25410.44.46.255
9510.44.47.0/2510.44.47.1 – 10.44.47.12610.44.47.127
9610.44.47.128/2510.44.47.129 – 10.44.47.25410.44.47.255
9710.44.48.0/2510.44.48.1 – 10.44.48.12610.44.48.127
9810.44.48.128/2510.44.48.129 – 10.44.48.25410.44.48.255
9910.44.49.0/2510.44.49.1 – 10.44.49.12610.44.49.127
10010.44.49.128/2510.44.49.129 – 10.44.49.25410.44.49.255
10110.44.50.0/2510.44.50.1 – 10.44.50.12610.44.50.127
10210.44.50.128/2510.44.50.129 – 10.44.50.25410.44.50.255
10310.44.51.0/2510.44.51.1 – 10.44.51.12610.44.51.127
10410.44.51.128/2510.44.51.129 – 10.44.51.25410.44.51.255
10510.44.52.0/2510.44.52.1 – 10.44.52.12610.44.52.127
10610.44.52.128/2510.44.52.129 – 10.44.52.25410.44.52.255
10710.44.53.0/2510.44.53.1 – 10.44.53.12610.44.53.127
10810.44.53.128/2510.44.53.129 – 10.44.53.25410.44.53.255
10910.44.54.0/2510.44.54.1 – 10.44.54.12610.44.54.127
11010.44.54.128/2510.44.54.129 – 10.44.54.25410.44.54.255
11110.44.55.0/2510.44.55.1 – 10.44.55.12610.44.55.127
11210.44.55.128/2510.44.55.129 – 10.44.55.25410.44.55.255
11310.44.56.0/2510.44.56.1 – 10.44.56.12610.44.56.127
11410.44.56.128/2510.44.56.129 – 10.44.56.25410.44.56.255
11510.44.57.0/2510.44.57.1 – 10.44.57.12610.44.57.127
11610.44.57.128/2510.44.57.129 – 10.44.57.25410.44.57.255
11710.44.58.0/2510.44.58.1 – 10.44.58.12610.44.58.127
11810.44.58.128/2510.44.58.129 – 10.44.58.25410.44.58.255
11910.44.59.0/2510.44.59.1 – 10.44.59.12610.44.59.127
12010.44.59.128/2510.44.59.129 – 10.44.59.25410.44.59.255
12110.44.60.0/2510.44.60.1 – 10.44.60.12610.44.60.127
12210.44.60.128/2510.44.60.129 – 10.44.60.25410.44.60.255
12310.44.61.0/2510.44.61.1 – 10.44.61.12610.44.61.127
12410.44.61.128/2510.44.61.129 – 10.44.61.25410.44.61.255
12510.44.62.0/2510.44.62.1 – 10.44.62.12610.44.62.127
12610.44.62.128/2510.44.62.129 – 10.44.62.25410.44.62.255
12710.44.63.0/2510.44.63.1 – 10.44.63.12610.44.63.127
12810.44.63.128/2510.44.63.129 – 10.44.63.25410.44.63.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /18
/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-
/18255.255.192.016,38416,3821
/19255.255.224.08,1928,1902 split →
/20255.255.240.04,0964,0944 split →
/21255.255.248.02,0482,0468 split →
/22255.255.252.01,0241,02216 split →
/23255.255.254.051251032 split →
/24255.255.255.025625464 split →
/25255.255.255.128128126128 split →
/26255.255.255.1926462256 split →
/27255.255.255.2243230512 split →
/28255.255.255.24016141,024 split →
/29255.255.255.248862,048 split →
/30255.255.255.252424,096 split →
/31255.255.255.254228,192 split →
/32255.255.255.2551116,384 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 →