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)10.41.0.0/18
network10.41.0.0/18
broadcast10.41.63.255
first host10.41.0.1
last host10.41.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.41.0.0/18
address00001010.00101001.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00101001.00000000.00000000
broadcast00001010.00101001.00111111.11111111
green = network part, grey = host part
hex0x0a290000
decimal170459136
reverse dns0.0.41.10.in-addr.arpa
ipv4-mapped::ffff:a29:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.41.0.0/2510.41.0.1 – 10.41.0.12610.41.0.127
210.41.0.128/2510.41.0.129 – 10.41.0.25410.41.0.255
310.41.1.0/2510.41.1.1 – 10.41.1.12610.41.1.127
410.41.1.128/2510.41.1.129 – 10.41.1.25410.41.1.255
510.41.2.0/2510.41.2.1 – 10.41.2.12610.41.2.127
610.41.2.128/2510.41.2.129 – 10.41.2.25410.41.2.255
710.41.3.0/2510.41.3.1 – 10.41.3.12610.41.3.127
810.41.3.128/2510.41.3.129 – 10.41.3.25410.41.3.255
910.41.4.0/2510.41.4.1 – 10.41.4.12610.41.4.127
1010.41.4.128/2510.41.4.129 – 10.41.4.25410.41.4.255
1110.41.5.0/2510.41.5.1 – 10.41.5.12610.41.5.127
1210.41.5.128/2510.41.5.129 – 10.41.5.25410.41.5.255
1310.41.6.0/2510.41.6.1 – 10.41.6.12610.41.6.127
1410.41.6.128/2510.41.6.129 – 10.41.6.25410.41.6.255
1510.41.7.0/2510.41.7.1 – 10.41.7.12610.41.7.127
1610.41.7.128/2510.41.7.129 – 10.41.7.25410.41.7.255
1710.41.8.0/2510.41.8.1 – 10.41.8.12610.41.8.127
1810.41.8.128/2510.41.8.129 – 10.41.8.25410.41.8.255
1910.41.9.0/2510.41.9.1 – 10.41.9.12610.41.9.127
2010.41.9.128/2510.41.9.129 – 10.41.9.25410.41.9.255
2110.41.10.0/2510.41.10.1 – 10.41.10.12610.41.10.127
2210.41.10.128/2510.41.10.129 – 10.41.10.25410.41.10.255
2310.41.11.0/2510.41.11.1 – 10.41.11.12610.41.11.127
2410.41.11.128/2510.41.11.129 – 10.41.11.25410.41.11.255
2510.41.12.0/2510.41.12.1 – 10.41.12.12610.41.12.127
2610.41.12.128/2510.41.12.129 – 10.41.12.25410.41.12.255
2710.41.13.0/2510.41.13.1 – 10.41.13.12610.41.13.127
2810.41.13.128/2510.41.13.129 – 10.41.13.25410.41.13.255
2910.41.14.0/2510.41.14.1 – 10.41.14.12610.41.14.127
3010.41.14.128/2510.41.14.129 – 10.41.14.25410.41.14.255
3110.41.15.0/2510.41.15.1 – 10.41.15.12610.41.15.127
3210.41.15.128/2510.41.15.129 – 10.41.15.25410.41.15.255
3310.41.16.0/2510.41.16.1 – 10.41.16.12610.41.16.127
3410.41.16.128/2510.41.16.129 – 10.41.16.25410.41.16.255
3510.41.17.0/2510.41.17.1 – 10.41.17.12610.41.17.127
3610.41.17.128/2510.41.17.129 – 10.41.17.25410.41.17.255
3710.41.18.0/2510.41.18.1 – 10.41.18.12610.41.18.127
3810.41.18.128/2510.41.18.129 – 10.41.18.25410.41.18.255
3910.41.19.0/2510.41.19.1 – 10.41.19.12610.41.19.127
4010.41.19.128/2510.41.19.129 – 10.41.19.25410.41.19.255
4110.41.20.0/2510.41.20.1 – 10.41.20.12610.41.20.127
4210.41.20.128/2510.41.20.129 – 10.41.20.25410.41.20.255
4310.41.21.0/2510.41.21.1 – 10.41.21.12610.41.21.127
4410.41.21.128/2510.41.21.129 – 10.41.21.25410.41.21.255
4510.41.22.0/2510.41.22.1 – 10.41.22.12610.41.22.127
4610.41.22.128/2510.41.22.129 – 10.41.22.25410.41.22.255
4710.41.23.0/2510.41.23.1 – 10.41.23.12610.41.23.127
4810.41.23.128/2510.41.23.129 – 10.41.23.25410.41.23.255
4910.41.24.0/2510.41.24.1 – 10.41.24.12610.41.24.127
5010.41.24.128/2510.41.24.129 – 10.41.24.25410.41.24.255
5110.41.25.0/2510.41.25.1 – 10.41.25.12610.41.25.127
5210.41.25.128/2510.41.25.129 – 10.41.25.25410.41.25.255
5310.41.26.0/2510.41.26.1 – 10.41.26.12610.41.26.127
5410.41.26.128/2510.41.26.129 – 10.41.26.25410.41.26.255
5510.41.27.0/2510.41.27.1 – 10.41.27.12610.41.27.127
5610.41.27.128/2510.41.27.129 – 10.41.27.25410.41.27.255
5710.41.28.0/2510.41.28.1 – 10.41.28.12610.41.28.127
5810.41.28.128/2510.41.28.129 – 10.41.28.25410.41.28.255
5910.41.29.0/2510.41.29.1 – 10.41.29.12610.41.29.127
6010.41.29.128/2510.41.29.129 – 10.41.29.25410.41.29.255
6110.41.30.0/2510.41.30.1 – 10.41.30.12610.41.30.127
6210.41.30.128/2510.41.30.129 – 10.41.30.25410.41.30.255
6310.41.31.0/2510.41.31.1 – 10.41.31.12610.41.31.127
6410.41.31.128/2510.41.31.129 – 10.41.31.25410.41.31.255
6510.41.32.0/2510.41.32.1 – 10.41.32.12610.41.32.127
6610.41.32.128/2510.41.32.129 – 10.41.32.25410.41.32.255
6710.41.33.0/2510.41.33.1 – 10.41.33.12610.41.33.127
6810.41.33.128/2510.41.33.129 – 10.41.33.25410.41.33.255
6910.41.34.0/2510.41.34.1 – 10.41.34.12610.41.34.127
7010.41.34.128/2510.41.34.129 – 10.41.34.25410.41.34.255
7110.41.35.0/2510.41.35.1 – 10.41.35.12610.41.35.127
7210.41.35.128/2510.41.35.129 – 10.41.35.25410.41.35.255
7310.41.36.0/2510.41.36.1 – 10.41.36.12610.41.36.127
7410.41.36.128/2510.41.36.129 – 10.41.36.25410.41.36.255
7510.41.37.0/2510.41.37.1 – 10.41.37.12610.41.37.127
7610.41.37.128/2510.41.37.129 – 10.41.37.25410.41.37.255
7710.41.38.0/2510.41.38.1 – 10.41.38.12610.41.38.127
7810.41.38.128/2510.41.38.129 – 10.41.38.25410.41.38.255
7910.41.39.0/2510.41.39.1 – 10.41.39.12610.41.39.127
8010.41.39.128/2510.41.39.129 – 10.41.39.25410.41.39.255
8110.41.40.0/2510.41.40.1 – 10.41.40.12610.41.40.127
8210.41.40.128/2510.41.40.129 – 10.41.40.25410.41.40.255
8310.41.41.0/2510.41.41.1 – 10.41.41.12610.41.41.127
8410.41.41.128/2510.41.41.129 – 10.41.41.25410.41.41.255
8510.41.42.0/2510.41.42.1 – 10.41.42.12610.41.42.127
8610.41.42.128/2510.41.42.129 – 10.41.42.25410.41.42.255
8710.41.43.0/2510.41.43.1 – 10.41.43.12610.41.43.127
8810.41.43.128/2510.41.43.129 – 10.41.43.25410.41.43.255
8910.41.44.0/2510.41.44.1 – 10.41.44.12610.41.44.127
9010.41.44.128/2510.41.44.129 – 10.41.44.25410.41.44.255
9110.41.45.0/2510.41.45.1 – 10.41.45.12610.41.45.127
9210.41.45.128/2510.41.45.129 – 10.41.45.25410.41.45.255
9310.41.46.0/2510.41.46.1 – 10.41.46.12610.41.46.127
9410.41.46.128/2510.41.46.129 – 10.41.46.25410.41.46.255
9510.41.47.0/2510.41.47.1 – 10.41.47.12610.41.47.127
9610.41.47.128/2510.41.47.129 – 10.41.47.25410.41.47.255
9710.41.48.0/2510.41.48.1 – 10.41.48.12610.41.48.127
9810.41.48.128/2510.41.48.129 – 10.41.48.25410.41.48.255
9910.41.49.0/2510.41.49.1 – 10.41.49.12610.41.49.127
10010.41.49.128/2510.41.49.129 – 10.41.49.25410.41.49.255
10110.41.50.0/2510.41.50.1 – 10.41.50.12610.41.50.127
10210.41.50.128/2510.41.50.129 – 10.41.50.25410.41.50.255
10310.41.51.0/2510.41.51.1 – 10.41.51.12610.41.51.127
10410.41.51.128/2510.41.51.129 – 10.41.51.25410.41.51.255
10510.41.52.0/2510.41.52.1 – 10.41.52.12610.41.52.127
10610.41.52.128/2510.41.52.129 – 10.41.52.25410.41.52.255
10710.41.53.0/2510.41.53.1 – 10.41.53.12610.41.53.127
10810.41.53.128/2510.41.53.129 – 10.41.53.25410.41.53.255
10910.41.54.0/2510.41.54.1 – 10.41.54.12610.41.54.127
11010.41.54.128/2510.41.54.129 – 10.41.54.25410.41.54.255
11110.41.55.0/2510.41.55.1 – 10.41.55.12610.41.55.127
11210.41.55.128/2510.41.55.129 – 10.41.55.25410.41.55.255
11310.41.56.0/2510.41.56.1 – 10.41.56.12610.41.56.127
11410.41.56.128/2510.41.56.129 – 10.41.56.25410.41.56.255
11510.41.57.0/2510.41.57.1 – 10.41.57.12610.41.57.127
11610.41.57.128/2510.41.57.129 – 10.41.57.25410.41.57.255
11710.41.58.0/2510.41.58.1 – 10.41.58.12610.41.58.127
11810.41.58.128/2510.41.58.129 – 10.41.58.25410.41.58.255
11910.41.59.0/2510.41.59.1 – 10.41.59.12610.41.59.127
12010.41.59.128/2510.41.59.129 – 10.41.59.25410.41.59.255
12110.41.60.0/2510.41.60.1 – 10.41.60.12610.41.60.127
12210.41.60.128/2510.41.60.129 – 10.41.60.25410.41.60.255
12310.41.61.0/2510.41.61.1 – 10.41.61.12610.41.61.127
12410.41.61.128/2510.41.61.129 – 10.41.61.25410.41.61.255
12510.41.62.0/2510.41.62.1 – 10.41.62.12610.41.62.127
12610.41.62.128/2510.41.62.129 – 10.41.62.25410.41.62.255
12710.41.63.0/2510.41.63.1 – 10.41.63.12610.41.63.127
12810.41.63.128/2510.41.63.129 – 10.41.63.25410.41.63.255
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 →