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)10.72.76.0/26
network10.72.76.0/26
broadcast10.72.76.63
first host10.72.76.1
last host10.72.76.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.72.76.0/26
address00001010.01001000.01001100.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001000.01001100.00000000
broadcast00001010.01001000.01001100.00111111
green = network part, grey = host part
hex0x0a484c00
decimal172510208
reverse dns0.76.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:4c00

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.72.76.0/3210.72.76.0 – 10.72.76.010.72.76.0
210.72.76.1/3210.72.76.1 – 10.72.76.110.72.76.1
310.72.76.2/3210.72.76.2 – 10.72.76.210.72.76.2
410.72.76.3/3210.72.76.3 – 10.72.76.310.72.76.3
510.72.76.4/3210.72.76.4 – 10.72.76.410.72.76.4
610.72.76.5/3210.72.76.5 – 10.72.76.510.72.76.5
710.72.76.6/3210.72.76.6 – 10.72.76.610.72.76.6
810.72.76.7/3210.72.76.7 – 10.72.76.710.72.76.7
910.72.76.8/3210.72.76.8 – 10.72.76.810.72.76.8
1010.72.76.9/3210.72.76.9 – 10.72.76.910.72.76.9
1110.72.76.10/3210.72.76.10 – 10.72.76.1010.72.76.10
1210.72.76.11/3210.72.76.11 – 10.72.76.1110.72.76.11
1310.72.76.12/3210.72.76.12 – 10.72.76.1210.72.76.12
1410.72.76.13/3210.72.76.13 – 10.72.76.1310.72.76.13
1510.72.76.14/3210.72.76.14 – 10.72.76.1410.72.76.14
1610.72.76.15/3210.72.76.15 – 10.72.76.1510.72.76.15
1710.72.76.16/3210.72.76.16 – 10.72.76.1610.72.76.16
1810.72.76.17/3210.72.76.17 – 10.72.76.1710.72.76.17
1910.72.76.18/3210.72.76.18 – 10.72.76.1810.72.76.18
2010.72.76.19/3210.72.76.19 – 10.72.76.1910.72.76.19
2110.72.76.20/3210.72.76.20 – 10.72.76.2010.72.76.20
2210.72.76.21/3210.72.76.21 – 10.72.76.2110.72.76.21
2310.72.76.22/3210.72.76.22 – 10.72.76.2210.72.76.22
2410.72.76.23/3210.72.76.23 – 10.72.76.2310.72.76.23
2510.72.76.24/3210.72.76.24 – 10.72.76.2410.72.76.24
2610.72.76.25/3210.72.76.25 – 10.72.76.2510.72.76.25
2710.72.76.26/3210.72.76.26 – 10.72.76.2610.72.76.26
2810.72.76.27/3210.72.76.27 – 10.72.76.2710.72.76.27
2910.72.76.28/3210.72.76.28 – 10.72.76.2810.72.76.28
3010.72.76.29/3210.72.76.29 – 10.72.76.2910.72.76.29
3110.72.76.30/3210.72.76.30 – 10.72.76.3010.72.76.30
3210.72.76.31/3210.72.76.31 – 10.72.76.3110.72.76.31
3310.72.76.32/3210.72.76.32 – 10.72.76.3210.72.76.32
3410.72.76.33/3210.72.76.33 – 10.72.76.3310.72.76.33
3510.72.76.34/3210.72.76.34 – 10.72.76.3410.72.76.34
3610.72.76.35/3210.72.76.35 – 10.72.76.3510.72.76.35
3710.72.76.36/3210.72.76.36 – 10.72.76.3610.72.76.36
3810.72.76.37/3210.72.76.37 – 10.72.76.3710.72.76.37
3910.72.76.38/3210.72.76.38 – 10.72.76.3810.72.76.38
4010.72.76.39/3210.72.76.39 – 10.72.76.3910.72.76.39
4110.72.76.40/3210.72.76.40 – 10.72.76.4010.72.76.40
4210.72.76.41/3210.72.76.41 – 10.72.76.4110.72.76.41
4310.72.76.42/3210.72.76.42 – 10.72.76.4210.72.76.42
4410.72.76.43/3210.72.76.43 – 10.72.76.4310.72.76.43
4510.72.76.44/3210.72.76.44 – 10.72.76.4410.72.76.44
4610.72.76.45/3210.72.76.45 – 10.72.76.4510.72.76.45
4710.72.76.46/3210.72.76.46 – 10.72.76.4610.72.76.46
4810.72.76.47/3210.72.76.47 – 10.72.76.4710.72.76.47
4910.72.76.48/3210.72.76.48 – 10.72.76.4810.72.76.48
5010.72.76.49/3210.72.76.49 – 10.72.76.4910.72.76.49
5110.72.76.50/3210.72.76.50 – 10.72.76.5010.72.76.50
5210.72.76.51/3210.72.76.51 – 10.72.76.5110.72.76.51
5310.72.76.52/3210.72.76.52 – 10.72.76.5210.72.76.52
5410.72.76.53/3210.72.76.53 – 10.72.76.5310.72.76.53
5510.72.76.54/3210.72.76.54 – 10.72.76.5410.72.76.54
5610.72.76.55/3210.72.76.55 – 10.72.76.5510.72.76.55
5710.72.76.56/3210.72.76.56 – 10.72.76.5610.72.76.56
5810.72.76.57/3210.72.76.57 – 10.72.76.5710.72.76.57
5910.72.76.58/3210.72.76.58 – 10.72.76.5810.72.76.58
6010.72.76.59/3210.72.76.59 – 10.72.76.5910.72.76.59
6110.72.76.60/3210.72.76.60 – 10.72.76.6010.72.76.60
6210.72.76.61/3210.72.76.61 – 10.72.76.6110.72.76.61
6310.72.76.62/3210.72.76.62 – 10.72.76.6210.72.76.62
6410.72.76.63/3210.72.76.63 – 10.72.76.6310.72.76.63
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /26
/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-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,190-
/20255.255.240.04,0964,094-
/21255.255.248.02,0482,046-
/22255.255.252.01,0241,022-
/23255.255.254.0512510-
/24255.255.255.0256254-
/25255.255.255.128128126-
/26255.255.255.19264621
/27255.255.255.22432302 split →
/28255.255.255.24016144 split →
/29255.255.255.248868 split →
/30255.255.255.2524216 split →
/31255.255.255.2542232 split →
/32255.255.255.2551164 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 →