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)10.35.0.0/18
network10.35.0.0/18
broadcast10.35.63.255
first host10.35.0.1
last host10.35.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.35.0.0/18
address00001010.00100011.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00100011.00000000.00000000
broadcast00001010.00100011.00111111.11111111
green = network part, grey = host part
hex0x0a230000
decimal170065920
reverse dns0.0.35.10.in-addr.arpa
ipv4-mapped::ffff:a23:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.35.0.0/2510.35.0.1 – 10.35.0.12610.35.0.127
210.35.0.128/2510.35.0.129 – 10.35.0.25410.35.0.255
310.35.1.0/2510.35.1.1 – 10.35.1.12610.35.1.127
410.35.1.128/2510.35.1.129 – 10.35.1.25410.35.1.255
510.35.2.0/2510.35.2.1 – 10.35.2.12610.35.2.127
610.35.2.128/2510.35.2.129 – 10.35.2.25410.35.2.255
710.35.3.0/2510.35.3.1 – 10.35.3.12610.35.3.127
810.35.3.128/2510.35.3.129 – 10.35.3.25410.35.3.255
910.35.4.0/2510.35.4.1 – 10.35.4.12610.35.4.127
1010.35.4.128/2510.35.4.129 – 10.35.4.25410.35.4.255
1110.35.5.0/2510.35.5.1 – 10.35.5.12610.35.5.127
1210.35.5.128/2510.35.5.129 – 10.35.5.25410.35.5.255
1310.35.6.0/2510.35.6.1 – 10.35.6.12610.35.6.127
1410.35.6.128/2510.35.6.129 – 10.35.6.25410.35.6.255
1510.35.7.0/2510.35.7.1 – 10.35.7.12610.35.7.127
1610.35.7.128/2510.35.7.129 – 10.35.7.25410.35.7.255
1710.35.8.0/2510.35.8.1 – 10.35.8.12610.35.8.127
1810.35.8.128/2510.35.8.129 – 10.35.8.25410.35.8.255
1910.35.9.0/2510.35.9.1 – 10.35.9.12610.35.9.127
2010.35.9.128/2510.35.9.129 – 10.35.9.25410.35.9.255
2110.35.10.0/2510.35.10.1 – 10.35.10.12610.35.10.127
2210.35.10.128/2510.35.10.129 – 10.35.10.25410.35.10.255
2310.35.11.0/2510.35.11.1 – 10.35.11.12610.35.11.127
2410.35.11.128/2510.35.11.129 – 10.35.11.25410.35.11.255
2510.35.12.0/2510.35.12.1 – 10.35.12.12610.35.12.127
2610.35.12.128/2510.35.12.129 – 10.35.12.25410.35.12.255
2710.35.13.0/2510.35.13.1 – 10.35.13.12610.35.13.127
2810.35.13.128/2510.35.13.129 – 10.35.13.25410.35.13.255
2910.35.14.0/2510.35.14.1 – 10.35.14.12610.35.14.127
3010.35.14.128/2510.35.14.129 – 10.35.14.25410.35.14.255
3110.35.15.0/2510.35.15.1 – 10.35.15.12610.35.15.127
3210.35.15.128/2510.35.15.129 – 10.35.15.25410.35.15.255
3310.35.16.0/2510.35.16.1 – 10.35.16.12610.35.16.127
3410.35.16.128/2510.35.16.129 – 10.35.16.25410.35.16.255
3510.35.17.0/2510.35.17.1 – 10.35.17.12610.35.17.127
3610.35.17.128/2510.35.17.129 – 10.35.17.25410.35.17.255
3710.35.18.0/2510.35.18.1 – 10.35.18.12610.35.18.127
3810.35.18.128/2510.35.18.129 – 10.35.18.25410.35.18.255
3910.35.19.0/2510.35.19.1 – 10.35.19.12610.35.19.127
4010.35.19.128/2510.35.19.129 – 10.35.19.25410.35.19.255
4110.35.20.0/2510.35.20.1 – 10.35.20.12610.35.20.127
4210.35.20.128/2510.35.20.129 – 10.35.20.25410.35.20.255
4310.35.21.0/2510.35.21.1 – 10.35.21.12610.35.21.127
4410.35.21.128/2510.35.21.129 – 10.35.21.25410.35.21.255
4510.35.22.0/2510.35.22.1 – 10.35.22.12610.35.22.127
4610.35.22.128/2510.35.22.129 – 10.35.22.25410.35.22.255
4710.35.23.0/2510.35.23.1 – 10.35.23.12610.35.23.127
4810.35.23.128/2510.35.23.129 – 10.35.23.25410.35.23.255
4910.35.24.0/2510.35.24.1 – 10.35.24.12610.35.24.127
5010.35.24.128/2510.35.24.129 – 10.35.24.25410.35.24.255
5110.35.25.0/2510.35.25.1 – 10.35.25.12610.35.25.127
5210.35.25.128/2510.35.25.129 – 10.35.25.25410.35.25.255
5310.35.26.0/2510.35.26.1 – 10.35.26.12610.35.26.127
5410.35.26.128/2510.35.26.129 – 10.35.26.25410.35.26.255
5510.35.27.0/2510.35.27.1 – 10.35.27.12610.35.27.127
5610.35.27.128/2510.35.27.129 – 10.35.27.25410.35.27.255
5710.35.28.0/2510.35.28.1 – 10.35.28.12610.35.28.127
5810.35.28.128/2510.35.28.129 – 10.35.28.25410.35.28.255
5910.35.29.0/2510.35.29.1 – 10.35.29.12610.35.29.127
6010.35.29.128/2510.35.29.129 – 10.35.29.25410.35.29.255
6110.35.30.0/2510.35.30.1 – 10.35.30.12610.35.30.127
6210.35.30.128/2510.35.30.129 – 10.35.30.25410.35.30.255
6310.35.31.0/2510.35.31.1 – 10.35.31.12610.35.31.127
6410.35.31.128/2510.35.31.129 – 10.35.31.25410.35.31.255
6510.35.32.0/2510.35.32.1 – 10.35.32.12610.35.32.127
6610.35.32.128/2510.35.32.129 – 10.35.32.25410.35.32.255
6710.35.33.0/2510.35.33.1 – 10.35.33.12610.35.33.127
6810.35.33.128/2510.35.33.129 – 10.35.33.25410.35.33.255
6910.35.34.0/2510.35.34.1 – 10.35.34.12610.35.34.127
7010.35.34.128/2510.35.34.129 – 10.35.34.25410.35.34.255
7110.35.35.0/2510.35.35.1 – 10.35.35.12610.35.35.127
7210.35.35.128/2510.35.35.129 – 10.35.35.25410.35.35.255
7310.35.36.0/2510.35.36.1 – 10.35.36.12610.35.36.127
7410.35.36.128/2510.35.36.129 – 10.35.36.25410.35.36.255
7510.35.37.0/2510.35.37.1 – 10.35.37.12610.35.37.127
7610.35.37.128/2510.35.37.129 – 10.35.37.25410.35.37.255
7710.35.38.0/2510.35.38.1 – 10.35.38.12610.35.38.127
7810.35.38.128/2510.35.38.129 – 10.35.38.25410.35.38.255
7910.35.39.0/2510.35.39.1 – 10.35.39.12610.35.39.127
8010.35.39.128/2510.35.39.129 – 10.35.39.25410.35.39.255
8110.35.40.0/2510.35.40.1 – 10.35.40.12610.35.40.127
8210.35.40.128/2510.35.40.129 – 10.35.40.25410.35.40.255
8310.35.41.0/2510.35.41.1 – 10.35.41.12610.35.41.127
8410.35.41.128/2510.35.41.129 – 10.35.41.25410.35.41.255
8510.35.42.0/2510.35.42.1 – 10.35.42.12610.35.42.127
8610.35.42.128/2510.35.42.129 – 10.35.42.25410.35.42.255
8710.35.43.0/2510.35.43.1 – 10.35.43.12610.35.43.127
8810.35.43.128/2510.35.43.129 – 10.35.43.25410.35.43.255
8910.35.44.0/2510.35.44.1 – 10.35.44.12610.35.44.127
9010.35.44.128/2510.35.44.129 – 10.35.44.25410.35.44.255
9110.35.45.0/2510.35.45.1 – 10.35.45.12610.35.45.127
9210.35.45.128/2510.35.45.129 – 10.35.45.25410.35.45.255
9310.35.46.0/2510.35.46.1 – 10.35.46.12610.35.46.127
9410.35.46.128/2510.35.46.129 – 10.35.46.25410.35.46.255
9510.35.47.0/2510.35.47.1 – 10.35.47.12610.35.47.127
9610.35.47.128/2510.35.47.129 – 10.35.47.25410.35.47.255
9710.35.48.0/2510.35.48.1 – 10.35.48.12610.35.48.127
9810.35.48.128/2510.35.48.129 – 10.35.48.25410.35.48.255
9910.35.49.0/2510.35.49.1 – 10.35.49.12610.35.49.127
10010.35.49.128/2510.35.49.129 – 10.35.49.25410.35.49.255
10110.35.50.0/2510.35.50.1 – 10.35.50.12610.35.50.127
10210.35.50.128/2510.35.50.129 – 10.35.50.25410.35.50.255
10310.35.51.0/2510.35.51.1 – 10.35.51.12610.35.51.127
10410.35.51.128/2510.35.51.129 – 10.35.51.25410.35.51.255
10510.35.52.0/2510.35.52.1 – 10.35.52.12610.35.52.127
10610.35.52.128/2510.35.52.129 – 10.35.52.25410.35.52.255
10710.35.53.0/2510.35.53.1 – 10.35.53.12610.35.53.127
10810.35.53.128/2510.35.53.129 – 10.35.53.25410.35.53.255
10910.35.54.0/2510.35.54.1 – 10.35.54.12610.35.54.127
11010.35.54.128/2510.35.54.129 – 10.35.54.25410.35.54.255
11110.35.55.0/2510.35.55.1 – 10.35.55.12610.35.55.127
11210.35.55.128/2510.35.55.129 – 10.35.55.25410.35.55.255
11310.35.56.0/2510.35.56.1 – 10.35.56.12610.35.56.127
11410.35.56.128/2510.35.56.129 – 10.35.56.25410.35.56.255
11510.35.57.0/2510.35.57.1 – 10.35.57.12610.35.57.127
11610.35.57.128/2510.35.57.129 – 10.35.57.25410.35.57.255
11710.35.58.0/2510.35.58.1 – 10.35.58.12610.35.58.127
11810.35.58.128/2510.35.58.129 – 10.35.58.25410.35.58.255
11910.35.59.0/2510.35.59.1 – 10.35.59.12610.35.59.127
12010.35.59.128/2510.35.59.129 – 10.35.59.25410.35.59.255
12110.35.60.0/2510.35.60.1 – 10.35.60.12610.35.60.127
12210.35.60.128/2510.35.60.129 – 10.35.60.25410.35.60.255
12310.35.61.0/2510.35.61.1 – 10.35.61.12610.35.61.127
12410.35.61.128/2510.35.61.129 – 10.35.61.25410.35.61.255
12510.35.62.0/2510.35.62.1 – 10.35.62.12610.35.62.127
12610.35.62.128/2510.35.62.129 – 10.35.62.25410.35.62.255
12710.35.63.0/2510.35.63.1 – 10.35.63.12610.35.63.127
12810.35.63.128/2510.35.63.129 – 10.35.63.25410.35.63.255
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 →