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)10.34.0.0/18
network10.34.0.0/18
broadcast10.34.63.255
first host10.34.0.1
last host10.34.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.34.0.0/18
address00001010.00100010.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00100010.00000000.00000000
broadcast00001010.00100010.00111111.11111111
green = network part, grey = host part
hex0x0a220000
decimal170000384
reverse dns0.0.34.10.in-addr.arpa
ipv4-mapped::ffff:a22:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.34.0.0/2510.34.0.1 – 10.34.0.12610.34.0.127
210.34.0.128/2510.34.0.129 – 10.34.0.25410.34.0.255
310.34.1.0/2510.34.1.1 – 10.34.1.12610.34.1.127
410.34.1.128/2510.34.1.129 – 10.34.1.25410.34.1.255
510.34.2.0/2510.34.2.1 – 10.34.2.12610.34.2.127
610.34.2.128/2510.34.2.129 – 10.34.2.25410.34.2.255
710.34.3.0/2510.34.3.1 – 10.34.3.12610.34.3.127
810.34.3.128/2510.34.3.129 – 10.34.3.25410.34.3.255
910.34.4.0/2510.34.4.1 – 10.34.4.12610.34.4.127
1010.34.4.128/2510.34.4.129 – 10.34.4.25410.34.4.255
1110.34.5.0/2510.34.5.1 – 10.34.5.12610.34.5.127
1210.34.5.128/2510.34.5.129 – 10.34.5.25410.34.5.255
1310.34.6.0/2510.34.6.1 – 10.34.6.12610.34.6.127
1410.34.6.128/2510.34.6.129 – 10.34.6.25410.34.6.255
1510.34.7.0/2510.34.7.1 – 10.34.7.12610.34.7.127
1610.34.7.128/2510.34.7.129 – 10.34.7.25410.34.7.255
1710.34.8.0/2510.34.8.1 – 10.34.8.12610.34.8.127
1810.34.8.128/2510.34.8.129 – 10.34.8.25410.34.8.255
1910.34.9.0/2510.34.9.1 – 10.34.9.12610.34.9.127
2010.34.9.128/2510.34.9.129 – 10.34.9.25410.34.9.255
2110.34.10.0/2510.34.10.1 – 10.34.10.12610.34.10.127
2210.34.10.128/2510.34.10.129 – 10.34.10.25410.34.10.255
2310.34.11.0/2510.34.11.1 – 10.34.11.12610.34.11.127
2410.34.11.128/2510.34.11.129 – 10.34.11.25410.34.11.255
2510.34.12.0/2510.34.12.1 – 10.34.12.12610.34.12.127
2610.34.12.128/2510.34.12.129 – 10.34.12.25410.34.12.255
2710.34.13.0/2510.34.13.1 – 10.34.13.12610.34.13.127
2810.34.13.128/2510.34.13.129 – 10.34.13.25410.34.13.255
2910.34.14.0/2510.34.14.1 – 10.34.14.12610.34.14.127
3010.34.14.128/2510.34.14.129 – 10.34.14.25410.34.14.255
3110.34.15.0/2510.34.15.1 – 10.34.15.12610.34.15.127
3210.34.15.128/2510.34.15.129 – 10.34.15.25410.34.15.255
3310.34.16.0/2510.34.16.1 – 10.34.16.12610.34.16.127
3410.34.16.128/2510.34.16.129 – 10.34.16.25410.34.16.255
3510.34.17.0/2510.34.17.1 – 10.34.17.12610.34.17.127
3610.34.17.128/2510.34.17.129 – 10.34.17.25410.34.17.255
3710.34.18.0/2510.34.18.1 – 10.34.18.12610.34.18.127
3810.34.18.128/2510.34.18.129 – 10.34.18.25410.34.18.255
3910.34.19.0/2510.34.19.1 – 10.34.19.12610.34.19.127
4010.34.19.128/2510.34.19.129 – 10.34.19.25410.34.19.255
4110.34.20.0/2510.34.20.1 – 10.34.20.12610.34.20.127
4210.34.20.128/2510.34.20.129 – 10.34.20.25410.34.20.255
4310.34.21.0/2510.34.21.1 – 10.34.21.12610.34.21.127
4410.34.21.128/2510.34.21.129 – 10.34.21.25410.34.21.255
4510.34.22.0/2510.34.22.1 – 10.34.22.12610.34.22.127
4610.34.22.128/2510.34.22.129 – 10.34.22.25410.34.22.255
4710.34.23.0/2510.34.23.1 – 10.34.23.12610.34.23.127
4810.34.23.128/2510.34.23.129 – 10.34.23.25410.34.23.255
4910.34.24.0/2510.34.24.1 – 10.34.24.12610.34.24.127
5010.34.24.128/2510.34.24.129 – 10.34.24.25410.34.24.255
5110.34.25.0/2510.34.25.1 – 10.34.25.12610.34.25.127
5210.34.25.128/2510.34.25.129 – 10.34.25.25410.34.25.255
5310.34.26.0/2510.34.26.1 – 10.34.26.12610.34.26.127
5410.34.26.128/2510.34.26.129 – 10.34.26.25410.34.26.255
5510.34.27.0/2510.34.27.1 – 10.34.27.12610.34.27.127
5610.34.27.128/2510.34.27.129 – 10.34.27.25410.34.27.255
5710.34.28.0/2510.34.28.1 – 10.34.28.12610.34.28.127
5810.34.28.128/2510.34.28.129 – 10.34.28.25410.34.28.255
5910.34.29.0/2510.34.29.1 – 10.34.29.12610.34.29.127
6010.34.29.128/2510.34.29.129 – 10.34.29.25410.34.29.255
6110.34.30.0/2510.34.30.1 – 10.34.30.12610.34.30.127
6210.34.30.128/2510.34.30.129 – 10.34.30.25410.34.30.255
6310.34.31.0/2510.34.31.1 – 10.34.31.12610.34.31.127
6410.34.31.128/2510.34.31.129 – 10.34.31.25410.34.31.255
6510.34.32.0/2510.34.32.1 – 10.34.32.12610.34.32.127
6610.34.32.128/2510.34.32.129 – 10.34.32.25410.34.32.255
6710.34.33.0/2510.34.33.1 – 10.34.33.12610.34.33.127
6810.34.33.128/2510.34.33.129 – 10.34.33.25410.34.33.255
6910.34.34.0/2510.34.34.1 – 10.34.34.12610.34.34.127
7010.34.34.128/2510.34.34.129 – 10.34.34.25410.34.34.255
7110.34.35.0/2510.34.35.1 – 10.34.35.12610.34.35.127
7210.34.35.128/2510.34.35.129 – 10.34.35.25410.34.35.255
7310.34.36.0/2510.34.36.1 – 10.34.36.12610.34.36.127
7410.34.36.128/2510.34.36.129 – 10.34.36.25410.34.36.255
7510.34.37.0/2510.34.37.1 – 10.34.37.12610.34.37.127
7610.34.37.128/2510.34.37.129 – 10.34.37.25410.34.37.255
7710.34.38.0/2510.34.38.1 – 10.34.38.12610.34.38.127
7810.34.38.128/2510.34.38.129 – 10.34.38.25410.34.38.255
7910.34.39.0/2510.34.39.1 – 10.34.39.12610.34.39.127
8010.34.39.128/2510.34.39.129 – 10.34.39.25410.34.39.255
8110.34.40.0/2510.34.40.1 – 10.34.40.12610.34.40.127
8210.34.40.128/2510.34.40.129 – 10.34.40.25410.34.40.255
8310.34.41.0/2510.34.41.1 – 10.34.41.12610.34.41.127
8410.34.41.128/2510.34.41.129 – 10.34.41.25410.34.41.255
8510.34.42.0/2510.34.42.1 – 10.34.42.12610.34.42.127
8610.34.42.128/2510.34.42.129 – 10.34.42.25410.34.42.255
8710.34.43.0/2510.34.43.1 – 10.34.43.12610.34.43.127
8810.34.43.128/2510.34.43.129 – 10.34.43.25410.34.43.255
8910.34.44.0/2510.34.44.1 – 10.34.44.12610.34.44.127
9010.34.44.128/2510.34.44.129 – 10.34.44.25410.34.44.255
9110.34.45.0/2510.34.45.1 – 10.34.45.12610.34.45.127
9210.34.45.128/2510.34.45.129 – 10.34.45.25410.34.45.255
9310.34.46.0/2510.34.46.1 – 10.34.46.12610.34.46.127
9410.34.46.128/2510.34.46.129 – 10.34.46.25410.34.46.255
9510.34.47.0/2510.34.47.1 – 10.34.47.12610.34.47.127
9610.34.47.128/2510.34.47.129 – 10.34.47.25410.34.47.255
9710.34.48.0/2510.34.48.1 – 10.34.48.12610.34.48.127
9810.34.48.128/2510.34.48.129 – 10.34.48.25410.34.48.255
9910.34.49.0/2510.34.49.1 – 10.34.49.12610.34.49.127
10010.34.49.128/2510.34.49.129 – 10.34.49.25410.34.49.255
10110.34.50.0/2510.34.50.1 – 10.34.50.12610.34.50.127
10210.34.50.128/2510.34.50.129 – 10.34.50.25410.34.50.255
10310.34.51.0/2510.34.51.1 – 10.34.51.12610.34.51.127
10410.34.51.128/2510.34.51.129 – 10.34.51.25410.34.51.255
10510.34.52.0/2510.34.52.1 – 10.34.52.12610.34.52.127
10610.34.52.128/2510.34.52.129 – 10.34.52.25410.34.52.255
10710.34.53.0/2510.34.53.1 – 10.34.53.12610.34.53.127
10810.34.53.128/2510.34.53.129 – 10.34.53.25410.34.53.255
10910.34.54.0/2510.34.54.1 – 10.34.54.12610.34.54.127
11010.34.54.128/2510.34.54.129 – 10.34.54.25410.34.54.255
11110.34.55.0/2510.34.55.1 – 10.34.55.12610.34.55.127
11210.34.55.128/2510.34.55.129 – 10.34.55.25410.34.55.255
11310.34.56.0/2510.34.56.1 – 10.34.56.12610.34.56.127
11410.34.56.128/2510.34.56.129 – 10.34.56.25410.34.56.255
11510.34.57.0/2510.34.57.1 – 10.34.57.12610.34.57.127
11610.34.57.128/2510.34.57.129 – 10.34.57.25410.34.57.255
11710.34.58.0/2510.34.58.1 – 10.34.58.12610.34.58.127
11810.34.58.128/2510.34.58.129 – 10.34.58.25410.34.58.255
11910.34.59.0/2510.34.59.1 – 10.34.59.12610.34.59.127
12010.34.59.128/2510.34.59.129 – 10.34.59.25410.34.59.255
12110.34.60.0/2510.34.60.1 – 10.34.60.12610.34.60.127
12210.34.60.128/2510.34.60.129 – 10.34.60.25410.34.60.255
12310.34.61.0/2510.34.61.1 – 10.34.61.12610.34.61.127
12410.34.61.128/2510.34.61.129 – 10.34.61.25410.34.61.255
12510.34.62.0/2510.34.62.1 – 10.34.62.12610.34.62.127
12610.34.62.128/2510.34.62.129 – 10.34.62.25410.34.62.255
12710.34.63.0/2510.34.63.1 – 10.34.63.12610.34.63.127
12810.34.63.128/2510.34.63.129 – 10.34.63.25410.34.63.255
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 →