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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)10.4.209.0/26
network10.4.209.0/26
broadcast10.4.209.63
first host10.4.209.1
last host10.4.209.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.4.209.0/26
address00001010.00000100.11010001.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000100.11010001.00000000
broadcast00001010.00000100.11010001.00111111
green = network part, grey = host part
hex0x0a04d100
decimal168087808
reverse dns0.209.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:d100

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.209.0/3210.4.209.0 – 10.4.209.010.4.209.0
210.4.209.1/3210.4.209.1 – 10.4.209.110.4.209.1
310.4.209.2/3210.4.209.2 – 10.4.209.210.4.209.2
410.4.209.3/3210.4.209.3 – 10.4.209.310.4.209.3
510.4.209.4/3210.4.209.4 – 10.4.209.410.4.209.4
610.4.209.5/3210.4.209.5 – 10.4.209.510.4.209.5
710.4.209.6/3210.4.209.6 – 10.4.209.610.4.209.6
810.4.209.7/3210.4.209.7 – 10.4.209.710.4.209.7
910.4.209.8/3210.4.209.8 – 10.4.209.810.4.209.8
1010.4.209.9/3210.4.209.9 – 10.4.209.910.4.209.9
1110.4.209.10/3210.4.209.10 – 10.4.209.1010.4.209.10
1210.4.209.11/3210.4.209.11 – 10.4.209.1110.4.209.11
1310.4.209.12/3210.4.209.12 – 10.4.209.1210.4.209.12
1410.4.209.13/3210.4.209.13 – 10.4.209.1310.4.209.13
1510.4.209.14/3210.4.209.14 – 10.4.209.1410.4.209.14
1610.4.209.15/3210.4.209.15 – 10.4.209.1510.4.209.15
1710.4.209.16/3210.4.209.16 – 10.4.209.1610.4.209.16
1810.4.209.17/3210.4.209.17 – 10.4.209.1710.4.209.17
1910.4.209.18/3210.4.209.18 – 10.4.209.1810.4.209.18
2010.4.209.19/3210.4.209.19 – 10.4.209.1910.4.209.19
2110.4.209.20/3210.4.209.20 – 10.4.209.2010.4.209.20
2210.4.209.21/3210.4.209.21 – 10.4.209.2110.4.209.21
2310.4.209.22/3210.4.209.22 – 10.4.209.2210.4.209.22
2410.4.209.23/3210.4.209.23 – 10.4.209.2310.4.209.23
2510.4.209.24/3210.4.209.24 – 10.4.209.2410.4.209.24
2610.4.209.25/3210.4.209.25 – 10.4.209.2510.4.209.25
2710.4.209.26/3210.4.209.26 – 10.4.209.2610.4.209.26
2810.4.209.27/3210.4.209.27 – 10.4.209.2710.4.209.27
2910.4.209.28/3210.4.209.28 – 10.4.209.2810.4.209.28
3010.4.209.29/3210.4.209.29 – 10.4.209.2910.4.209.29
3110.4.209.30/3210.4.209.30 – 10.4.209.3010.4.209.30
3210.4.209.31/3210.4.209.31 – 10.4.209.3110.4.209.31
3310.4.209.32/3210.4.209.32 – 10.4.209.3210.4.209.32
3410.4.209.33/3210.4.209.33 – 10.4.209.3310.4.209.33
3510.4.209.34/3210.4.209.34 – 10.4.209.3410.4.209.34
3610.4.209.35/3210.4.209.35 – 10.4.209.3510.4.209.35
3710.4.209.36/3210.4.209.36 – 10.4.209.3610.4.209.36
3810.4.209.37/3210.4.209.37 – 10.4.209.3710.4.209.37
3910.4.209.38/3210.4.209.38 – 10.4.209.3810.4.209.38
4010.4.209.39/3210.4.209.39 – 10.4.209.3910.4.209.39
4110.4.209.40/3210.4.209.40 – 10.4.209.4010.4.209.40
4210.4.209.41/3210.4.209.41 – 10.4.209.4110.4.209.41
4310.4.209.42/3210.4.209.42 – 10.4.209.4210.4.209.42
4410.4.209.43/3210.4.209.43 – 10.4.209.4310.4.209.43
4510.4.209.44/3210.4.209.44 – 10.4.209.4410.4.209.44
4610.4.209.45/3210.4.209.45 – 10.4.209.4510.4.209.45
4710.4.209.46/3210.4.209.46 – 10.4.209.4610.4.209.46
4810.4.209.47/3210.4.209.47 – 10.4.209.4710.4.209.47
4910.4.209.48/3210.4.209.48 – 10.4.209.4810.4.209.48
5010.4.209.49/3210.4.209.49 – 10.4.209.4910.4.209.49
5110.4.209.50/3210.4.209.50 – 10.4.209.5010.4.209.50
5210.4.209.51/3210.4.209.51 – 10.4.209.5110.4.209.51
5310.4.209.52/3210.4.209.52 – 10.4.209.5210.4.209.52
5410.4.209.53/3210.4.209.53 – 10.4.209.5310.4.209.53
5510.4.209.54/3210.4.209.54 – 10.4.209.5410.4.209.54
5610.4.209.55/3210.4.209.55 – 10.4.209.5510.4.209.55
5710.4.209.56/3210.4.209.56 – 10.4.209.5610.4.209.56
5810.4.209.57/3210.4.209.57 – 10.4.209.5710.4.209.57
5910.4.209.58/3210.4.209.58 – 10.4.209.5810.4.209.58
6010.4.209.59/3210.4.209.59 – 10.4.209.5910.4.209.59
6110.4.209.60/3210.4.209.60 – 10.4.209.6010.4.209.60
6210.4.209.61/3210.4.209.61 – 10.4.209.6110.4.209.61
6310.4.209.62/3210.4.209.62 – 10.4.209.6210.4.209.62
6410.4.209.63/3210.4.209.63 – 10.4.209.6310.4.209.63
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 →