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)10.77.0.0/18
network10.77.0.0/18
broadcast10.77.63.255
first host10.77.0.1
last host10.77.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.77.0.0/18
address00001010.01001101.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.01001101.00000000.00000000
broadcast00001010.01001101.00111111.11111111
green = network part, grey = host part
hex0x0a4d0000
decimal172818432
reverse dns0.0.77.10.in-addr.arpa
ipv4-mapped::ffff:a4d:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.77.0.0/2510.77.0.1 – 10.77.0.12610.77.0.127
210.77.0.128/2510.77.0.129 – 10.77.0.25410.77.0.255
310.77.1.0/2510.77.1.1 – 10.77.1.12610.77.1.127
410.77.1.128/2510.77.1.129 – 10.77.1.25410.77.1.255
510.77.2.0/2510.77.2.1 – 10.77.2.12610.77.2.127
610.77.2.128/2510.77.2.129 – 10.77.2.25410.77.2.255
710.77.3.0/2510.77.3.1 – 10.77.3.12610.77.3.127
810.77.3.128/2510.77.3.129 – 10.77.3.25410.77.3.255
910.77.4.0/2510.77.4.1 – 10.77.4.12610.77.4.127
1010.77.4.128/2510.77.4.129 – 10.77.4.25410.77.4.255
1110.77.5.0/2510.77.5.1 – 10.77.5.12610.77.5.127
1210.77.5.128/2510.77.5.129 – 10.77.5.25410.77.5.255
1310.77.6.0/2510.77.6.1 – 10.77.6.12610.77.6.127
1410.77.6.128/2510.77.6.129 – 10.77.6.25410.77.6.255
1510.77.7.0/2510.77.7.1 – 10.77.7.12610.77.7.127
1610.77.7.128/2510.77.7.129 – 10.77.7.25410.77.7.255
1710.77.8.0/2510.77.8.1 – 10.77.8.12610.77.8.127
1810.77.8.128/2510.77.8.129 – 10.77.8.25410.77.8.255
1910.77.9.0/2510.77.9.1 – 10.77.9.12610.77.9.127
2010.77.9.128/2510.77.9.129 – 10.77.9.25410.77.9.255
2110.77.10.0/2510.77.10.1 – 10.77.10.12610.77.10.127
2210.77.10.128/2510.77.10.129 – 10.77.10.25410.77.10.255
2310.77.11.0/2510.77.11.1 – 10.77.11.12610.77.11.127
2410.77.11.128/2510.77.11.129 – 10.77.11.25410.77.11.255
2510.77.12.0/2510.77.12.1 – 10.77.12.12610.77.12.127
2610.77.12.128/2510.77.12.129 – 10.77.12.25410.77.12.255
2710.77.13.0/2510.77.13.1 – 10.77.13.12610.77.13.127
2810.77.13.128/2510.77.13.129 – 10.77.13.25410.77.13.255
2910.77.14.0/2510.77.14.1 – 10.77.14.12610.77.14.127
3010.77.14.128/2510.77.14.129 – 10.77.14.25410.77.14.255
3110.77.15.0/2510.77.15.1 – 10.77.15.12610.77.15.127
3210.77.15.128/2510.77.15.129 – 10.77.15.25410.77.15.255
3310.77.16.0/2510.77.16.1 – 10.77.16.12610.77.16.127
3410.77.16.128/2510.77.16.129 – 10.77.16.25410.77.16.255
3510.77.17.0/2510.77.17.1 – 10.77.17.12610.77.17.127
3610.77.17.128/2510.77.17.129 – 10.77.17.25410.77.17.255
3710.77.18.0/2510.77.18.1 – 10.77.18.12610.77.18.127
3810.77.18.128/2510.77.18.129 – 10.77.18.25410.77.18.255
3910.77.19.0/2510.77.19.1 – 10.77.19.12610.77.19.127
4010.77.19.128/2510.77.19.129 – 10.77.19.25410.77.19.255
4110.77.20.0/2510.77.20.1 – 10.77.20.12610.77.20.127
4210.77.20.128/2510.77.20.129 – 10.77.20.25410.77.20.255
4310.77.21.0/2510.77.21.1 – 10.77.21.12610.77.21.127
4410.77.21.128/2510.77.21.129 – 10.77.21.25410.77.21.255
4510.77.22.0/2510.77.22.1 – 10.77.22.12610.77.22.127
4610.77.22.128/2510.77.22.129 – 10.77.22.25410.77.22.255
4710.77.23.0/2510.77.23.1 – 10.77.23.12610.77.23.127
4810.77.23.128/2510.77.23.129 – 10.77.23.25410.77.23.255
4910.77.24.0/2510.77.24.1 – 10.77.24.12610.77.24.127
5010.77.24.128/2510.77.24.129 – 10.77.24.25410.77.24.255
5110.77.25.0/2510.77.25.1 – 10.77.25.12610.77.25.127
5210.77.25.128/2510.77.25.129 – 10.77.25.25410.77.25.255
5310.77.26.0/2510.77.26.1 – 10.77.26.12610.77.26.127
5410.77.26.128/2510.77.26.129 – 10.77.26.25410.77.26.255
5510.77.27.0/2510.77.27.1 – 10.77.27.12610.77.27.127
5610.77.27.128/2510.77.27.129 – 10.77.27.25410.77.27.255
5710.77.28.0/2510.77.28.1 – 10.77.28.12610.77.28.127
5810.77.28.128/2510.77.28.129 – 10.77.28.25410.77.28.255
5910.77.29.0/2510.77.29.1 – 10.77.29.12610.77.29.127
6010.77.29.128/2510.77.29.129 – 10.77.29.25410.77.29.255
6110.77.30.0/2510.77.30.1 – 10.77.30.12610.77.30.127
6210.77.30.128/2510.77.30.129 – 10.77.30.25410.77.30.255
6310.77.31.0/2510.77.31.1 – 10.77.31.12610.77.31.127
6410.77.31.128/2510.77.31.129 – 10.77.31.25410.77.31.255
6510.77.32.0/2510.77.32.1 – 10.77.32.12610.77.32.127
6610.77.32.128/2510.77.32.129 – 10.77.32.25410.77.32.255
6710.77.33.0/2510.77.33.1 – 10.77.33.12610.77.33.127
6810.77.33.128/2510.77.33.129 – 10.77.33.25410.77.33.255
6910.77.34.0/2510.77.34.1 – 10.77.34.12610.77.34.127
7010.77.34.128/2510.77.34.129 – 10.77.34.25410.77.34.255
7110.77.35.0/2510.77.35.1 – 10.77.35.12610.77.35.127
7210.77.35.128/2510.77.35.129 – 10.77.35.25410.77.35.255
7310.77.36.0/2510.77.36.1 – 10.77.36.12610.77.36.127
7410.77.36.128/2510.77.36.129 – 10.77.36.25410.77.36.255
7510.77.37.0/2510.77.37.1 – 10.77.37.12610.77.37.127
7610.77.37.128/2510.77.37.129 – 10.77.37.25410.77.37.255
7710.77.38.0/2510.77.38.1 – 10.77.38.12610.77.38.127
7810.77.38.128/2510.77.38.129 – 10.77.38.25410.77.38.255
7910.77.39.0/2510.77.39.1 – 10.77.39.12610.77.39.127
8010.77.39.128/2510.77.39.129 – 10.77.39.25410.77.39.255
8110.77.40.0/2510.77.40.1 – 10.77.40.12610.77.40.127
8210.77.40.128/2510.77.40.129 – 10.77.40.25410.77.40.255
8310.77.41.0/2510.77.41.1 – 10.77.41.12610.77.41.127
8410.77.41.128/2510.77.41.129 – 10.77.41.25410.77.41.255
8510.77.42.0/2510.77.42.1 – 10.77.42.12610.77.42.127
8610.77.42.128/2510.77.42.129 – 10.77.42.25410.77.42.255
8710.77.43.0/2510.77.43.1 – 10.77.43.12610.77.43.127
8810.77.43.128/2510.77.43.129 – 10.77.43.25410.77.43.255
8910.77.44.0/2510.77.44.1 – 10.77.44.12610.77.44.127
9010.77.44.128/2510.77.44.129 – 10.77.44.25410.77.44.255
9110.77.45.0/2510.77.45.1 – 10.77.45.12610.77.45.127
9210.77.45.128/2510.77.45.129 – 10.77.45.25410.77.45.255
9310.77.46.0/2510.77.46.1 – 10.77.46.12610.77.46.127
9410.77.46.128/2510.77.46.129 – 10.77.46.25410.77.46.255
9510.77.47.0/2510.77.47.1 – 10.77.47.12610.77.47.127
9610.77.47.128/2510.77.47.129 – 10.77.47.25410.77.47.255
9710.77.48.0/2510.77.48.1 – 10.77.48.12610.77.48.127
9810.77.48.128/2510.77.48.129 – 10.77.48.25410.77.48.255
9910.77.49.0/2510.77.49.1 – 10.77.49.12610.77.49.127
10010.77.49.128/2510.77.49.129 – 10.77.49.25410.77.49.255
10110.77.50.0/2510.77.50.1 – 10.77.50.12610.77.50.127
10210.77.50.128/2510.77.50.129 – 10.77.50.25410.77.50.255
10310.77.51.0/2510.77.51.1 – 10.77.51.12610.77.51.127
10410.77.51.128/2510.77.51.129 – 10.77.51.25410.77.51.255
10510.77.52.0/2510.77.52.1 – 10.77.52.12610.77.52.127
10610.77.52.128/2510.77.52.129 – 10.77.52.25410.77.52.255
10710.77.53.0/2510.77.53.1 – 10.77.53.12610.77.53.127
10810.77.53.128/2510.77.53.129 – 10.77.53.25410.77.53.255
10910.77.54.0/2510.77.54.1 – 10.77.54.12610.77.54.127
11010.77.54.128/2510.77.54.129 – 10.77.54.25410.77.54.255
11110.77.55.0/2510.77.55.1 – 10.77.55.12610.77.55.127
11210.77.55.128/2510.77.55.129 – 10.77.55.25410.77.55.255
11310.77.56.0/2510.77.56.1 – 10.77.56.12610.77.56.127
11410.77.56.128/2510.77.56.129 – 10.77.56.25410.77.56.255
11510.77.57.0/2510.77.57.1 – 10.77.57.12610.77.57.127
11610.77.57.128/2510.77.57.129 – 10.77.57.25410.77.57.255
11710.77.58.0/2510.77.58.1 – 10.77.58.12610.77.58.127
11810.77.58.128/2510.77.58.129 – 10.77.58.25410.77.58.255
11910.77.59.0/2510.77.59.1 – 10.77.59.12610.77.59.127
12010.77.59.128/2510.77.59.129 – 10.77.59.25410.77.59.255
12110.77.60.0/2510.77.60.1 – 10.77.60.12610.77.60.127
12210.77.60.128/2510.77.60.129 – 10.77.60.25410.77.60.255
12310.77.61.0/2510.77.61.1 – 10.77.61.12610.77.61.127
12410.77.61.128/2510.77.61.129 – 10.77.61.25410.77.61.255
12510.77.62.0/2510.77.62.1 – 10.77.62.12610.77.62.127
12610.77.62.128/2510.77.62.129 – 10.77.62.25410.77.62.255
12710.77.63.0/2510.77.63.1 – 10.77.63.12610.77.63.127
12810.77.63.128/2510.77.63.129 – 10.77.63.25410.77.63.255
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 →