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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)10.4.231.0/26
network10.4.231.0/26
broadcast10.4.231.63
first host10.4.231.1
last host10.4.231.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.4.231.0/26
address00001010.00000100.11100111.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000100.11100111.00000000
broadcast00001010.00000100.11100111.00111111
green = network part, grey = host part
hex0x0a04e700
decimal168093440
reverse dns0.231.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:e700

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.231.0/3210.4.231.0 – 10.4.231.010.4.231.0
210.4.231.1/3210.4.231.1 – 10.4.231.110.4.231.1
310.4.231.2/3210.4.231.2 – 10.4.231.210.4.231.2
410.4.231.3/3210.4.231.3 – 10.4.231.310.4.231.3
510.4.231.4/3210.4.231.4 – 10.4.231.410.4.231.4
610.4.231.5/3210.4.231.5 – 10.4.231.510.4.231.5
710.4.231.6/3210.4.231.6 – 10.4.231.610.4.231.6
810.4.231.7/3210.4.231.7 – 10.4.231.710.4.231.7
910.4.231.8/3210.4.231.8 – 10.4.231.810.4.231.8
1010.4.231.9/3210.4.231.9 – 10.4.231.910.4.231.9
1110.4.231.10/3210.4.231.10 – 10.4.231.1010.4.231.10
1210.4.231.11/3210.4.231.11 – 10.4.231.1110.4.231.11
1310.4.231.12/3210.4.231.12 – 10.4.231.1210.4.231.12
1410.4.231.13/3210.4.231.13 – 10.4.231.1310.4.231.13
1510.4.231.14/3210.4.231.14 – 10.4.231.1410.4.231.14
1610.4.231.15/3210.4.231.15 – 10.4.231.1510.4.231.15
1710.4.231.16/3210.4.231.16 – 10.4.231.1610.4.231.16
1810.4.231.17/3210.4.231.17 – 10.4.231.1710.4.231.17
1910.4.231.18/3210.4.231.18 – 10.4.231.1810.4.231.18
2010.4.231.19/3210.4.231.19 – 10.4.231.1910.4.231.19
2110.4.231.20/3210.4.231.20 – 10.4.231.2010.4.231.20
2210.4.231.21/3210.4.231.21 – 10.4.231.2110.4.231.21
2310.4.231.22/3210.4.231.22 – 10.4.231.2210.4.231.22
2410.4.231.23/3210.4.231.23 – 10.4.231.2310.4.231.23
2510.4.231.24/3210.4.231.24 – 10.4.231.2410.4.231.24
2610.4.231.25/3210.4.231.25 – 10.4.231.2510.4.231.25
2710.4.231.26/3210.4.231.26 – 10.4.231.2610.4.231.26
2810.4.231.27/3210.4.231.27 – 10.4.231.2710.4.231.27
2910.4.231.28/3210.4.231.28 – 10.4.231.2810.4.231.28
3010.4.231.29/3210.4.231.29 – 10.4.231.2910.4.231.29
3110.4.231.30/3210.4.231.30 – 10.4.231.3010.4.231.30
3210.4.231.31/3210.4.231.31 – 10.4.231.3110.4.231.31
3310.4.231.32/3210.4.231.32 – 10.4.231.3210.4.231.32
3410.4.231.33/3210.4.231.33 – 10.4.231.3310.4.231.33
3510.4.231.34/3210.4.231.34 – 10.4.231.3410.4.231.34
3610.4.231.35/3210.4.231.35 – 10.4.231.3510.4.231.35
3710.4.231.36/3210.4.231.36 – 10.4.231.3610.4.231.36
3810.4.231.37/3210.4.231.37 – 10.4.231.3710.4.231.37
3910.4.231.38/3210.4.231.38 – 10.4.231.3810.4.231.38
4010.4.231.39/3210.4.231.39 – 10.4.231.3910.4.231.39
4110.4.231.40/3210.4.231.40 – 10.4.231.4010.4.231.40
4210.4.231.41/3210.4.231.41 – 10.4.231.4110.4.231.41
4310.4.231.42/3210.4.231.42 – 10.4.231.4210.4.231.42
4410.4.231.43/3210.4.231.43 – 10.4.231.4310.4.231.43
4510.4.231.44/3210.4.231.44 – 10.4.231.4410.4.231.44
4610.4.231.45/3210.4.231.45 – 10.4.231.4510.4.231.45
4710.4.231.46/3210.4.231.46 – 10.4.231.4610.4.231.46
4810.4.231.47/3210.4.231.47 – 10.4.231.4710.4.231.47
4910.4.231.48/3210.4.231.48 – 10.4.231.4810.4.231.48
5010.4.231.49/3210.4.231.49 – 10.4.231.4910.4.231.49
5110.4.231.50/3210.4.231.50 – 10.4.231.5010.4.231.50
5210.4.231.51/3210.4.231.51 – 10.4.231.5110.4.231.51
5310.4.231.52/3210.4.231.52 – 10.4.231.5210.4.231.52
5410.4.231.53/3210.4.231.53 – 10.4.231.5310.4.231.53
5510.4.231.54/3210.4.231.54 – 10.4.231.5410.4.231.54
5610.4.231.55/3210.4.231.55 – 10.4.231.5510.4.231.55
5710.4.231.56/3210.4.231.56 – 10.4.231.5610.4.231.56
5810.4.231.57/3210.4.231.57 – 10.4.231.5710.4.231.57
5910.4.231.58/3210.4.231.58 – 10.4.231.5810.4.231.58
6010.4.231.59/3210.4.231.59 – 10.4.231.5910.4.231.59
6110.4.231.60/3210.4.231.60 – 10.4.231.6010.4.231.60
6210.4.231.61/3210.4.231.61 – 10.4.231.6110.4.231.61
6310.4.231.62/3210.4.231.62 – 10.4.231.6210.4.231.62
6410.4.231.63/3210.4.231.63 – 10.4.231.6310.4.231.63
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 →