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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)10.2.38.0/26
network10.2.38.0/26
broadcast10.2.38.63
first host10.2.38.1
last host10.2.38.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.38.0/26
address00001010.00000010.00100110.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.00100110.00000000
broadcast00001010.00000010.00100110.00111111
green = network part, grey = host part
hex0x0a022600
decimal167912960
reverse dns0.38.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:2600

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.38.0/3210.2.38.0 – 10.2.38.010.2.38.0
210.2.38.1/3210.2.38.1 – 10.2.38.110.2.38.1
310.2.38.2/3210.2.38.2 – 10.2.38.210.2.38.2
410.2.38.3/3210.2.38.3 – 10.2.38.310.2.38.3
510.2.38.4/3210.2.38.4 – 10.2.38.410.2.38.4
610.2.38.5/3210.2.38.5 – 10.2.38.510.2.38.5
710.2.38.6/3210.2.38.6 – 10.2.38.610.2.38.6
810.2.38.7/3210.2.38.7 – 10.2.38.710.2.38.7
910.2.38.8/3210.2.38.8 – 10.2.38.810.2.38.8
1010.2.38.9/3210.2.38.9 – 10.2.38.910.2.38.9
1110.2.38.10/3210.2.38.10 – 10.2.38.1010.2.38.10
1210.2.38.11/3210.2.38.11 – 10.2.38.1110.2.38.11
1310.2.38.12/3210.2.38.12 – 10.2.38.1210.2.38.12
1410.2.38.13/3210.2.38.13 – 10.2.38.1310.2.38.13
1510.2.38.14/3210.2.38.14 – 10.2.38.1410.2.38.14
1610.2.38.15/3210.2.38.15 – 10.2.38.1510.2.38.15
1710.2.38.16/3210.2.38.16 – 10.2.38.1610.2.38.16
1810.2.38.17/3210.2.38.17 – 10.2.38.1710.2.38.17
1910.2.38.18/3210.2.38.18 – 10.2.38.1810.2.38.18
2010.2.38.19/3210.2.38.19 – 10.2.38.1910.2.38.19
2110.2.38.20/3210.2.38.20 – 10.2.38.2010.2.38.20
2210.2.38.21/3210.2.38.21 – 10.2.38.2110.2.38.21
2310.2.38.22/3210.2.38.22 – 10.2.38.2210.2.38.22
2410.2.38.23/3210.2.38.23 – 10.2.38.2310.2.38.23
2510.2.38.24/3210.2.38.24 – 10.2.38.2410.2.38.24
2610.2.38.25/3210.2.38.25 – 10.2.38.2510.2.38.25
2710.2.38.26/3210.2.38.26 – 10.2.38.2610.2.38.26
2810.2.38.27/3210.2.38.27 – 10.2.38.2710.2.38.27
2910.2.38.28/3210.2.38.28 – 10.2.38.2810.2.38.28
3010.2.38.29/3210.2.38.29 – 10.2.38.2910.2.38.29
3110.2.38.30/3210.2.38.30 – 10.2.38.3010.2.38.30
3210.2.38.31/3210.2.38.31 – 10.2.38.3110.2.38.31
3310.2.38.32/3210.2.38.32 – 10.2.38.3210.2.38.32
3410.2.38.33/3210.2.38.33 – 10.2.38.3310.2.38.33
3510.2.38.34/3210.2.38.34 – 10.2.38.3410.2.38.34
3610.2.38.35/3210.2.38.35 – 10.2.38.3510.2.38.35
3710.2.38.36/3210.2.38.36 – 10.2.38.3610.2.38.36
3810.2.38.37/3210.2.38.37 – 10.2.38.3710.2.38.37
3910.2.38.38/3210.2.38.38 – 10.2.38.3810.2.38.38
4010.2.38.39/3210.2.38.39 – 10.2.38.3910.2.38.39
4110.2.38.40/3210.2.38.40 – 10.2.38.4010.2.38.40
4210.2.38.41/3210.2.38.41 – 10.2.38.4110.2.38.41
4310.2.38.42/3210.2.38.42 – 10.2.38.4210.2.38.42
4410.2.38.43/3210.2.38.43 – 10.2.38.4310.2.38.43
4510.2.38.44/3210.2.38.44 – 10.2.38.4410.2.38.44
4610.2.38.45/3210.2.38.45 – 10.2.38.4510.2.38.45
4710.2.38.46/3210.2.38.46 – 10.2.38.4610.2.38.46
4810.2.38.47/3210.2.38.47 – 10.2.38.4710.2.38.47
4910.2.38.48/3210.2.38.48 – 10.2.38.4810.2.38.48
5010.2.38.49/3210.2.38.49 – 10.2.38.4910.2.38.49
5110.2.38.50/3210.2.38.50 – 10.2.38.5010.2.38.50
5210.2.38.51/3210.2.38.51 – 10.2.38.5110.2.38.51
5310.2.38.52/3210.2.38.52 – 10.2.38.5210.2.38.52
5410.2.38.53/3210.2.38.53 – 10.2.38.5310.2.38.53
5510.2.38.54/3210.2.38.54 – 10.2.38.5410.2.38.54
5610.2.38.55/3210.2.38.55 – 10.2.38.5510.2.38.55
5710.2.38.56/3210.2.38.56 – 10.2.38.5610.2.38.56
5810.2.38.57/3210.2.38.57 – 10.2.38.5710.2.38.57
5910.2.38.58/3210.2.38.58 – 10.2.38.5810.2.38.58
6010.2.38.59/3210.2.38.59 – 10.2.38.5910.2.38.59
6110.2.38.60/3210.2.38.60 – 10.2.38.6010.2.38.60
6210.2.38.61/3210.2.38.61 – 10.2.38.6110.2.38.61
6310.2.38.62/3210.2.38.62 – 10.2.38.6210.2.38.62
6410.2.38.63/3210.2.38.63 – 10.2.38.6310.2.38.63
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 →