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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)10.3.19.0/26
network10.3.19.0/26
broadcast10.3.19.63
first host10.3.19.1
last host10.3.19.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.19.0/26
address00001010.00000011.00010011.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.00010011.00000000
broadcast00001010.00000011.00010011.00111111
green = network part, grey = host part
hex0x0a031300
decimal167973632
reverse dns0.19.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:1300

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.19.0/3210.3.19.0 – 10.3.19.010.3.19.0
210.3.19.1/3210.3.19.1 – 10.3.19.110.3.19.1
310.3.19.2/3210.3.19.2 – 10.3.19.210.3.19.2
410.3.19.3/3210.3.19.3 – 10.3.19.310.3.19.3
510.3.19.4/3210.3.19.4 – 10.3.19.410.3.19.4
610.3.19.5/3210.3.19.5 – 10.3.19.510.3.19.5
710.3.19.6/3210.3.19.6 – 10.3.19.610.3.19.6
810.3.19.7/3210.3.19.7 – 10.3.19.710.3.19.7
910.3.19.8/3210.3.19.8 – 10.3.19.810.3.19.8
1010.3.19.9/3210.3.19.9 – 10.3.19.910.3.19.9
1110.3.19.10/3210.3.19.10 – 10.3.19.1010.3.19.10
1210.3.19.11/3210.3.19.11 – 10.3.19.1110.3.19.11
1310.3.19.12/3210.3.19.12 – 10.3.19.1210.3.19.12
1410.3.19.13/3210.3.19.13 – 10.3.19.1310.3.19.13
1510.3.19.14/3210.3.19.14 – 10.3.19.1410.3.19.14
1610.3.19.15/3210.3.19.15 – 10.3.19.1510.3.19.15
1710.3.19.16/3210.3.19.16 – 10.3.19.1610.3.19.16
1810.3.19.17/3210.3.19.17 – 10.3.19.1710.3.19.17
1910.3.19.18/3210.3.19.18 – 10.3.19.1810.3.19.18
2010.3.19.19/3210.3.19.19 – 10.3.19.1910.3.19.19
2110.3.19.20/3210.3.19.20 – 10.3.19.2010.3.19.20
2210.3.19.21/3210.3.19.21 – 10.3.19.2110.3.19.21
2310.3.19.22/3210.3.19.22 – 10.3.19.2210.3.19.22
2410.3.19.23/3210.3.19.23 – 10.3.19.2310.3.19.23
2510.3.19.24/3210.3.19.24 – 10.3.19.2410.3.19.24
2610.3.19.25/3210.3.19.25 – 10.3.19.2510.3.19.25
2710.3.19.26/3210.3.19.26 – 10.3.19.2610.3.19.26
2810.3.19.27/3210.3.19.27 – 10.3.19.2710.3.19.27
2910.3.19.28/3210.3.19.28 – 10.3.19.2810.3.19.28
3010.3.19.29/3210.3.19.29 – 10.3.19.2910.3.19.29
3110.3.19.30/3210.3.19.30 – 10.3.19.3010.3.19.30
3210.3.19.31/3210.3.19.31 – 10.3.19.3110.3.19.31
3310.3.19.32/3210.3.19.32 – 10.3.19.3210.3.19.32
3410.3.19.33/3210.3.19.33 – 10.3.19.3310.3.19.33
3510.3.19.34/3210.3.19.34 – 10.3.19.3410.3.19.34
3610.3.19.35/3210.3.19.35 – 10.3.19.3510.3.19.35
3710.3.19.36/3210.3.19.36 – 10.3.19.3610.3.19.36
3810.3.19.37/3210.3.19.37 – 10.3.19.3710.3.19.37
3910.3.19.38/3210.3.19.38 – 10.3.19.3810.3.19.38
4010.3.19.39/3210.3.19.39 – 10.3.19.3910.3.19.39
4110.3.19.40/3210.3.19.40 – 10.3.19.4010.3.19.40
4210.3.19.41/3210.3.19.41 – 10.3.19.4110.3.19.41
4310.3.19.42/3210.3.19.42 – 10.3.19.4210.3.19.42
4410.3.19.43/3210.3.19.43 – 10.3.19.4310.3.19.43
4510.3.19.44/3210.3.19.44 – 10.3.19.4410.3.19.44
4610.3.19.45/3210.3.19.45 – 10.3.19.4510.3.19.45
4710.3.19.46/3210.3.19.46 – 10.3.19.4610.3.19.46
4810.3.19.47/3210.3.19.47 – 10.3.19.4710.3.19.47
4910.3.19.48/3210.3.19.48 – 10.3.19.4810.3.19.48
5010.3.19.49/3210.3.19.49 – 10.3.19.4910.3.19.49
5110.3.19.50/3210.3.19.50 – 10.3.19.5010.3.19.50
5210.3.19.51/3210.3.19.51 – 10.3.19.5110.3.19.51
5310.3.19.52/3210.3.19.52 – 10.3.19.5210.3.19.52
5410.3.19.53/3210.3.19.53 – 10.3.19.5310.3.19.53
5510.3.19.54/3210.3.19.54 – 10.3.19.5410.3.19.54
5610.3.19.55/3210.3.19.55 – 10.3.19.5510.3.19.55
5710.3.19.56/3210.3.19.56 – 10.3.19.5610.3.19.56
5810.3.19.57/3210.3.19.57 – 10.3.19.5710.3.19.57
5910.3.19.58/3210.3.19.58 – 10.3.19.5810.3.19.58
6010.3.19.59/3210.3.19.59 – 10.3.19.5910.3.19.59
6110.3.19.60/3210.3.19.60 – 10.3.19.6010.3.19.60
6210.3.19.61/3210.3.19.61 – 10.3.19.6110.3.19.61
6310.3.19.62/3210.3.19.62 – 10.3.19.6210.3.19.62
6410.3.19.63/3210.3.19.63 – 10.3.19.6310.3.19.63
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 →