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)10.48.0.0/18
network10.48.0.0/18
broadcast10.48.63.255
first host10.48.0.1
last host10.48.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.48.0.0/18
address00001010.00110000.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00110000.00000000.00000000
broadcast00001010.00110000.00111111.11111111
green = network part, grey = host part
hex0x0a300000
decimal170917888
reverse dns0.0.48.10.in-addr.arpa
ipv4-mapped::ffff:a30:0

/18 split into /25 · 128 subnets

close ×
#networkhost rangebroadcast
110.48.0.0/2510.48.0.1 – 10.48.0.12610.48.0.127
210.48.0.128/2510.48.0.129 – 10.48.0.25410.48.0.255
310.48.1.0/2510.48.1.1 – 10.48.1.12610.48.1.127
410.48.1.128/2510.48.1.129 – 10.48.1.25410.48.1.255
510.48.2.0/2510.48.2.1 – 10.48.2.12610.48.2.127
610.48.2.128/2510.48.2.129 – 10.48.2.25410.48.2.255
710.48.3.0/2510.48.3.1 – 10.48.3.12610.48.3.127
810.48.3.128/2510.48.3.129 – 10.48.3.25410.48.3.255
910.48.4.0/2510.48.4.1 – 10.48.4.12610.48.4.127
1010.48.4.128/2510.48.4.129 – 10.48.4.25410.48.4.255
1110.48.5.0/2510.48.5.1 – 10.48.5.12610.48.5.127
1210.48.5.128/2510.48.5.129 – 10.48.5.25410.48.5.255
1310.48.6.0/2510.48.6.1 – 10.48.6.12610.48.6.127
1410.48.6.128/2510.48.6.129 – 10.48.6.25410.48.6.255
1510.48.7.0/2510.48.7.1 – 10.48.7.12610.48.7.127
1610.48.7.128/2510.48.7.129 – 10.48.7.25410.48.7.255
1710.48.8.0/2510.48.8.1 – 10.48.8.12610.48.8.127
1810.48.8.128/2510.48.8.129 – 10.48.8.25410.48.8.255
1910.48.9.0/2510.48.9.1 – 10.48.9.12610.48.9.127
2010.48.9.128/2510.48.9.129 – 10.48.9.25410.48.9.255
2110.48.10.0/2510.48.10.1 – 10.48.10.12610.48.10.127
2210.48.10.128/2510.48.10.129 – 10.48.10.25410.48.10.255
2310.48.11.0/2510.48.11.1 – 10.48.11.12610.48.11.127
2410.48.11.128/2510.48.11.129 – 10.48.11.25410.48.11.255
2510.48.12.0/2510.48.12.1 – 10.48.12.12610.48.12.127
2610.48.12.128/2510.48.12.129 – 10.48.12.25410.48.12.255
2710.48.13.0/2510.48.13.1 – 10.48.13.12610.48.13.127
2810.48.13.128/2510.48.13.129 – 10.48.13.25410.48.13.255
2910.48.14.0/2510.48.14.1 – 10.48.14.12610.48.14.127
3010.48.14.128/2510.48.14.129 – 10.48.14.25410.48.14.255
3110.48.15.0/2510.48.15.1 – 10.48.15.12610.48.15.127
3210.48.15.128/2510.48.15.129 – 10.48.15.25410.48.15.255
3310.48.16.0/2510.48.16.1 – 10.48.16.12610.48.16.127
3410.48.16.128/2510.48.16.129 – 10.48.16.25410.48.16.255
3510.48.17.0/2510.48.17.1 – 10.48.17.12610.48.17.127
3610.48.17.128/2510.48.17.129 – 10.48.17.25410.48.17.255
3710.48.18.0/2510.48.18.1 – 10.48.18.12610.48.18.127
3810.48.18.128/2510.48.18.129 – 10.48.18.25410.48.18.255
3910.48.19.0/2510.48.19.1 – 10.48.19.12610.48.19.127
4010.48.19.128/2510.48.19.129 – 10.48.19.25410.48.19.255
4110.48.20.0/2510.48.20.1 – 10.48.20.12610.48.20.127
4210.48.20.128/2510.48.20.129 – 10.48.20.25410.48.20.255
4310.48.21.0/2510.48.21.1 – 10.48.21.12610.48.21.127
4410.48.21.128/2510.48.21.129 – 10.48.21.25410.48.21.255
4510.48.22.0/2510.48.22.1 – 10.48.22.12610.48.22.127
4610.48.22.128/2510.48.22.129 – 10.48.22.25410.48.22.255
4710.48.23.0/2510.48.23.1 – 10.48.23.12610.48.23.127
4810.48.23.128/2510.48.23.129 – 10.48.23.25410.48.23.255
4910.48.24.0/2510.48.24.1 – 10.48.24.12610.48.24.127
5010.48.24.128/2510.48.24.129 – 10.48.24.25410.48.24.255
5110.48.25.0/2510.48.25.1 – 10.48.25.12610.48.25.127
5210.48.25.128/2510.48.25.129 – 10.48.25.25410.48.25.255
5310.48.26.0/2510.48.26.1 – 10.48.26.12610.48.26.127
5410.48.26.128/2510.48.26.129 – 10.48.26.25410.48.26.255
5510.48.27.0/2510.48.27.1 – 10.48.27.12610.48.27.127
5610.48.27.128/2510.48.27.129 – 10.48.27.25410.48.27.255
5710.48.28.0/2510.48.28.1 – 10.48.28.12610.48.28.127
5810.48.28.128/2510.48.28.129 – 10.48.28.25410.48.28.255
5910.48.29.0/2510.48.29.1 – 10.48.29.12610.48.29.127
6010.48.29.128/2510.48.29.129 – 10.48.29.25410.48.29.255
6110.48.30.0/2510.48.30.1 – 10.48.30.12610.48.30.127
6210.48.30.128/2510.48.30.129 – 10.48.30.25410.48.30.255
6310.48.31.0/2510.48.31.1 – 10.48.31.12610.48.31.127
6410.48.31.128/2510.48.31.129 – 10.48.31.25410.48.31.255
6510.48.32.0/2510.48.32.1 – 10.48.32.12610.48.32.127
6610.48.32.128/2510.48.32.129 – 10.48.32.25410.48.32.255
6710.48.33.0/2510.48.33.1 – 10.48.33.12610.48.33.127
6810.48.33.128/2510.48.33.129 – 10.48.33.25410.48.33.255
6910.48.34.0/2510.48.34.1 – 10.48.34.12610.48.34.127
7010.48.34.128/2510.48.34.129 – 10.48.34.25410.48.34.255
7110.48.35.0/2510.48.35.1 – 10.48.35.12610.48.35.127
7210.48.35.128/2510.48.35.129 – 10.48.35.25410.48.35.255
7310.48.36.0/2510.48.36.1 – 10.48.36.12610.48.36.127
7410.48.36.128/2510.48.36.129 – 10.48.36.25410.48.36.255
7510.48.37.0/2510.48.37.1 – 10.48.37.12610.48.37.127
7610.48.37.128/2510.48.37.129 – 10.48.37.25410.48.37.255
7710.48.38.0/2510.48.38.1 – 10.48.38.12610.48.38.127
7810.48.38.128/2510.48.38.129 – 10.48.38.25410.48.38.255
7910.48.39.0/2510.48.39.1 – 10.48.39.12610.48.39.127
8010.48.39.128/2510.48.39.129 – 10.48.39.25410.48.39.255
8110.48.40.0/2510.48.40.1 – 10.48.40.12610.48.40.127
8210.48.40.128/2510.48.40.129 – 10.48.40.25410.48.40.255
8310.48.41.0/2510.48.41.1 – 10.48.41.12610.48.41.127
8410.48.41.128/2510.48.41.129 – 10.48.41.25410.48.41.255
8510.48.42.0/2510.48.42.1 – 10.48.42.12610.48.42.127
8610.48.42.128/2510.48.42.129 – 10.48.42.25410.48.42.255
8710.48.43.0/2510.48.43.1 – 10.48.43.12610.48.43.127
8810.48.43.128/2510.48.43.129 – 10.48.43.25410.48.43.255
8910.48.44.0/2510.48.44.1 – 10.48.44.12610.48.44.127
9010.48.44.128/2510.48.44.129 – 10.48.44.25410.48.44.255
9110.48.45.0/2510.48.45.1 – 10.48.45.12610.48.45.127
9210.48.45.128/2510.48.45.129 – 10.48.45.25410.48.45.255
9310.48.46.0/2510.48.46.1 – 10.48.46.12610.48.46.127
9410.48.46.128/2510.48.46.129 – 10.48.46.25410.48.46.255
9510.48.47.0/2510.48.47.1 – 10.48.47.12610.48.47.127
9610.48.47.128/2510.48.47.129 – 10.48.47.25410.48.47.255
9710.48.48.0/2510.48.48.1 – 10.48.48.12610.48.48.127
9810.48.48.128/2510.48.48.129 – 10.48.48.25410.48.48.255
9910.48.49.0/2510.48.49.1 – 10.48.49.12610.48.49.127
10010.48.49.128/2510.48.49.129 – 10.48.49.25410.48.49.255
10110.48.50.0/2510.48.50.1 – 10.48.50.12610.48.50.127
10210.48.50.128/2510.48.50.129 – 10.48.50.25410.48.50.255
10310.48.51.0/2510.48.51.1 – 10.48.51.12610.48.51.127
10410.48.51.128/2510.48.51.129 – 10.48.51.25410.48.51.255
10510.48.52.0/2510.48.52.1 – 10.48.52.12610.48.52.127
10610.48.52.128/2510.48.52.129 – 10.48.52.25410.48.52.255
10710.48.53.0/2510.48.53.1 – 10.48.53.12610.48.53.127
10810.48.53.128/2510.48.53.129 – 10.48.53.25410.48.53.255
10910.48.54.0/2510.48.54.1 – 10.48.54.12610.48.54.127
11010.48.54.128/2510.48.54.129 – 10.48.54.25410.48.54.255
11110.48.55.0/2510.48.55.1 – 10.48.55.12610.48.55.127
11210.48.55.128/2510.48.55.129 – 10.48.55.25410.48.55.255
11310.48.56.0/2510.48.56.1 – 10.48.56.12610.48.56.127
11410.48.56.128/2510.48.56.129 – 10.48.56.25410.48.56.255
11510.48.57.0/2510.48.57.1 – 10.48.57.12610.48.57.127
11610.48.57.128/2510.48.57.129 – 10.48.57.25410.48.57.255
11710.48.58.0/2510.48.58.1 – 10.48.58.12610.48.58.127
11810.48.58.128/2510.48.58.129 – 10.48.58.25410.48.58.255
11910.48.59.0/2510.48.59.1 – 10.48.59.12610.48.59.127
12010.48.59.128/2510.48.59.129 – 10.48.59.25410.48.59.255
12110.48.60.0/2510.48.60.1 – 10.48.60.12610.48.60.127
12210.48.60.128/2510.48.60.129 – 10.48.60.25410.48.60.255
12310.48.61.0/2510.48.61.1 – 10.48.61.12610.48.61.127
12410.48.61.128/2510.48.61.129 – 10.48.61.25410.48.61.255
12510.48.62.0/2510.48.62.1 – 10.48.62.12610.48.62.127
12610.48.62.128/2510.48.62.129 – 10.48.62.25410.48.62.255
12710.48.63.0/2510.48.63.1 – 10.48.63.12610.48.63.127
12810.48.63.128/2510.48.63.129 – 10.48.63.25410.48.63.255
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 →