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)10.49.0.0/18
network10.49.0.0/18
broadcast10.49.63.255
first host10.49.0.1
last host10.49.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.49.0.0/18
address00001010.00110001.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00110001.00000000.00000000
broadcast00001010.00110001.00111111.11111111
green = network part, grey = host part
hex0x0a310000
decimal170983424
reverse dns0.0.49.10.in-addr.arpa
ipv4-mapped::ffff:a31:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.49.0.0/2510.49.0.1 – 10.49.0.12610.49.0.127
210.49.0.128/2510.49.0.129 – 10.49.0.25410.49.0.255
310.49.1.0/2510.49.1.1 – 10.49.1.12610.49.1.127
410.49.1.128/2510.49.1.129 – 10.49.1.25410.49.1.255
510.49.2.0/2510.49.2.1 – 10.49.2.12610.49.2.127
610.49.2.128/2510.49.2.129 – 10.49.2.25410.49.2.255
710.49.3.0/2510.49.3.1 – 10.49.3.12610.49.3.127
810.49.3.128/2510.49.3.129 – 10.49.3.25410.49.3.255
910.49.4.0/2510.49.4.1 – 10.49.4.12610.49.4.127
1010.49.4.128/2510.49.4.129 – 10.49.4.25410.49.4.255
1110.49.5.0/2510.49.5.1 – 10.49.5.12610.49.5.127
1210.49.5.128/2510.49.5.129 – 10.49.5.25410.49.5.255
1310.49.6.0/2510.49.6.1 – 10.49.6.12610.49.6.127
1410.49.6.128/2510.49.6.129 – 10.49.6.25410.49.6.255
1510.49.7.0/2510.49.7.1 – 10.49.7.12610.49.7.127
1610.49.7.128/2510.49.7.129 – 10.49.7.25410.49.7.255
1710.49.8.0/2510.49.8.1 – 10.49.8.12610.49.8.127
1810.49.8.128/2510.49.8.129 – 10.49.8.25410.49.8.255
1910.49.9.0/2510.49.9.1 – 10.49.9.12610.49.9.127
2010.49.9.128/2510.49.9.129 – 10.49.9.25410.49.9.255
2110.49.10.0/2510.49.10.1 – 10.49.10.12610.49.10.127
2210.49.10.128/2510.49.10.129 – 10.49.10.25410.49.10.255
2310.49.11.0/2510.49.11.1 – 10.49.11.12610.49.11.127
2410.49.11.128/2510.49.11.129 – 10.49.11.25410.49.11.255
2510.49.12.0/2510.49.12.1 – 10.49.12.12610.49.12.127
2610.49.12.128/2510.49.12.129 – 10.49.12.25410.49.12.255
2710.49.13.0/2510.49.13.1 – 10.49.13.12610.49.13.127
2810.49.13.128/2510.49.13.129 – 10.49.13.25410.49.13.255
2910.49.14.0/2510.49.14.1 – 10.49.14.12610.49.14.127
3010.49.14.128/2510.49.14.129 – 10.49.14.25410.49.14.255
3110.49.15.0/2510.49.15.1 – 10.49.15.12610.49.15.127
3210.49.15.128/2510.49.15.129 – 10.49.15.25410.49.15.255
3310.49.16.0/2510.49.16.1 – 10.49.16.12610.49.16.127
3410.49.16.128/2510.49.16.129 – 10.49.16.25410.49.16.255
3510.49.17.0/2510.49.17.1 – 10.49.17.12610.49.17.127
3610.49.17.128/2510.49.17.129 – 10.49.17.25410.49.17.255
3710.49.18.0/2510.49.18.1 – 10.49.18.12610.49.18.127
3810.49.18.128/2510.49.18.129 – 10.49.18.25410.49.18.255
3910.49.19.0/2510.49.19.1 – 10.49.19.12610.49.19.127
4010.49.19.128/2510.49.19.129 – 10.49.19.25410.49.19.255
4110.49.20.0/2510.49.20.1 – 10.49.20.12610.49.20.127
4210.49.20.128/2510.49.20.129 – 10.49.20.25410.49.20.255
4310.49.21.0/2510.49.21.1 – 10.49.21.12610.49.21.127
4410.49.21.128/2510.49.21.129 – 10.49.21.25410.49.21.255
4510.49.22.0/2510.49.22.1 – 10.49.22.12610.49.22.127
4610.49.22.128/2510.49.22.129 – 10.49.22.25410.49.22.255
4710.49.23.0/2510.49.23.1 – 10.49.23.12610.49.23.127
4810.49.23.128/2510.49.23.129 – 10.49.23.25410.49.23.255
4910.49.24.0/2510.49.24.1 – 10.49.24.12610.49.24.127
5010.49.24.128/2510.49.24.129 – 10.49.24.25410.49.24.255
5110.49.25.0/2510.49.25.1 – 10.49.25.12610.49.25.127
5210.49.25.128/2510.49.25.129 – 10.49.25.25410.49.25.255
5310.49.26.0/2510.49.26.1 – 10.49.26.12610.49.26.127
5410.49.26.128/2510.49.26.129 – 10.49.26.25410.49.26.255
5510.49.27.0/2510.49.27.1 – 10.49.27.12610.49.27.127
5610.49.27.128/2510.49.27.129 – 10.49.27.25410.49.27.255
5710.49.28.0/2510.49.28.1 – 10.49.28.12610.49.28.127
5810.49.28.128/2510.49.28.129 – 10.49.28.25410.49.28.255
5910.49.29.0/2510.49.29.1 – 10.49.29.12610.49.29.127
6010.49.29.128/2510.49.29.129 – 10.49.29.25410.49.29.255
6110.49.30.0/2510.49.30.1 – 10.49.30.12610.49.30.127
6210.49.30.128/2510.49.30.129 – 10.49.30.25410.49.30.255
6310.49.31.0/2510.49.31.1 – 10.49.31.12610.49.31.127
6410.49.31.128/2510.49.31.129 – 10.49.31.25410.49.31.255
6510.49.32.0/2510.49.32.1 – 10.49.32.12610.49.32.127
6610.49.32.128/2510.49.32.129 – 10.49.32.25410.49.32.255
6710.49.33.0/2510.49.33.1 – 10.49.33.12610.49.33.127
6810.49.33.128/2510.49.33.129 – 10.49.33.25410.49.33.255
6910.49.34.0/2510.49.34.1 – 10.49.34.12610.49.34.127
7010.49.34.128/2510.49.34.129 – 10.49.34.25410.49.34.255
7110.49.35.0/2510.49.35.1 – 10.49.35.12610.49.35.127
7210.49.35.128/2510.49.35.129 – 10.49.35.25410.49.35.255
7310.49.36.0/2510.49.36.1 – 10.49.36.12610.49.36.127
7410.49.36.128/2510.49.36.129 – 10.49.36.25410.49.36.255
7510.49.37.0/2510.49.37.1 – 10.49.37.12610.49.37.127
7610.49.37.128/2510.49.37.129 – 10.49.37.25410.49.37.255
7710.49.38.0/2510.49.38.1 – 10.49.38.12610.49.38.127
7810.49.38.128/2510.49.38.129 – 10.49.38.25410.49.38.255
7910.49.39.0/2510.49.39.1 – 10.49.39.12610.49.39.127
8010.49.39.128/2510.49.39.129 – 10.49.39.25410.49.39.255
8110.49.40.0/2510.49.40.1 – 10.49.40.12610.49.40.127
8210.49.40.128/2510.49.40.129 – 10.49.40.25410.49.40.255
8310.49.41.0/2510.49.41.1 – 10.49.41.12610.49.41.127
8410.49.41.128/2510.49.41.129 – 10.49.41.25410.49.41.255
8510.49.42.0/2510.49.42.1 – 10.49.42.12610.49.42.127
8610.49.42.128/2510.49.42.129 – 10.49.42.25410.49.42.255
8710.49.43.0/2510.49.43.1 – 10.49.43.12610.49.43.127
8810.49.43.128/2510.49.43.129 – 10.49.43.25410.49.43.255
8910.49.44.0/2510.49.44.1 – 10.49.44.12610.49.44.127
9010.49.44.128/2510.49.44.129 – 10.49.44.25410.49.44.255
9110.49.45.0/2510.49.45.1 – 10.49.45.12610.49.45.127
9210.49.45.128/2510.49.45.129 – 10.49.45.25410.49.45.255
9310.49.46.0/2510.49.46.1 – 10.49.46.12610.49.46.127
9410.49.46.128/2510.49.46.129 – 10.49.46.25410.49.46.255
9510.49.47.0/2510.49.47.1 – 10.49.47.12610.49.47.127
9610.49.47.128/2510.49.47.129 – 10.49.47.25410.49.47.255
9710.49.48.0/2510.49.48.1 – 10.49.48.12610.49.48.127
9810.49.48.128/2510.49.48.129 – 10.49.48.25410.49.48.255
9910.49.49.0/2510.49.49.1 – 10.49.49.12610.49.49.127
10010.49.49.128/2510.49.49.129 – 10.49.49.25410.49.49.255
10110.49.50.0/2510.49.50.1 – 10.49.50.12610.49.50.127
10210.49.50.128/2510.49.50.129 – 10.49.50.25410.49.50.255
10310.49.51.0/2510.49.51.1 – 10.49.51.12610.49.51.127
10410.49.51.128/2510.49.51.129 – 10.49.51.25410.49.51.255
10510.49.52.0/2510.49.52.1 – 10.49.52.12610.49.52.127
10610.49.52.128/2510.49.52.129 – 10.49.52.25410.49.52.255
10710.49.53.0/2510.49.53.1 – 10.49.53.12610.49.53.127
10810.49.53.128/2510.49.53.129 – 10.49.53.25410.49.53.255
10910.49.54.0/2510.49.54.1 – 10.49.54.12610.49.54.127
11010.49.54.128/2510.49.54.129 – 10.49.54.25410.49.54.255
11110.49.55.0/2510.49.55.1 – 10.49.55.12610.49.55.127
11210.49.55.128/2510.49.55.129 – 10.49.55.25410.49.55.255
11310.49.56.0/2510.49.56.1 – 10.49.56.12610.49.56.127
11410.49.56.128/2510.49.56.129 – 10.49.56.25410.49.56.255
11510.49.57.0/2510.49.57.1 – 10.49.57.12610.49.57.127
11610.49.57.128/2510.49.57.129 – 10.49.57.25410.49.57.255
11710.49.58.0/2510.49.58.1 – 10.49.58.12610.49.58.127
11810.49.58.128/2510.49.58.129 – 10.49.58.25410.49.58.255
11910.49.59.0/2510.49.59.1 – 10.49.59.12610.49.59.127
12010.49.59.128/2510.49.59.129 – 10.49.59.25410.49.59.255
12110.49.60.0/2510.49.60.1 – 10.49.60.12610.49.60.127
12210.49.60.128/2510.49.60.129 – 10.49.60.25410.49.60.255
12310.49.61.0/2510.49.61.1 – 10.49.61.12610.49.61.127
12410.49.61.128/2510.49.61.129 – 10.49.61.25410.49.61.255
12510.49.62.0/2510.49.62.1 – 10.49.62.12610.49.62.127
12610.49.62.128/2510.49.62.129 – 10.49.62.25410.49.62.255
12710.49.63.0/2510.49.63.1 – 10.49.63.12610.49.63.127
12810.49.63.128/2510.49.63.129 – 10.49.63.25410.49.63.255
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 →