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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)10.167.208.0/26
network10.167.208.0/26
broadcast10.167.208.63
first host10.167.208.1
last host10.167.208.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.167.208.0/26
address00001010.10100111.11010000.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10100111.11010000.00000000
broadcast00001010.10100111.11010000.00111111
green = network part, grey = host part
hex0x0aa7d000
decimal178769920
reverse dns0.208.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:d000

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.208.0/3210.167.208.0 – 10.167.208.010.167.208.0
210.167.208.1/3210.167.208.1 – 10.167.208.110.167.208.1
310.167.208.2/3210.167.208.2 – 10.167.208.210.167.208.2
410.167.208.3/3210.167.208.3 – 10.167.208.310.167.208.3
510.167.208.4/3210.167.208.4 – 10.167.208.410.167.208.4
610.167.208.5/3210.167.208.5 – 10.167.208.510.167.208.5
710.167.208.6/3210.167.208.6 – 10.167.208.610.167.208.6
810.167.208.7/3210.167.208.7 – 10.167.208.710.167.208.7
910.167.208.8/3210.167.208.8 – 10.167.208.810.167.208.8
1010.167.208.9/3210.167.208.9 – 10.167.208.910.167.208.9
1110.167.208.10/3210.167.208.10 – 10.167.208.1010.167.208.10
1210.167.208.11/3210.167.208.11 – 10.167.208.1110.167.208.11
1310.167.208.12/3210.167.208.12 – 10.167.208.1210.167.208.12
1410.167.208.13/3210.167.208.13 – 10.167.208.1310.167.208.13
1510.167.208.14/3210.167.208.14 – 10.167.208.1410.167.208.14
1610.167.208.15/3210.167.208.15 – 10.167.208.1510.167.208.15
1710.167.208.16/3210.167.208.16 – 10.167.208.1610.167.208.16
1810.167.208.17/3210.167.208.17 – 10.167.208.1710.167.208.17
1910.167.208.18/3210.167.208.18 – 10.167.208.1810.167.208.18
2010.167.208.19/3210.167.208.19 – 10.167.208.1910.167.208.19
2110.167.208.20/3210.167.208.20 – 10.167.208.2010.167.208.20
2210.167.208.21/3210.167.208.21 – 10.167.208.2110.167.208.21
2310.167.208.22/3210.167.208.22 – 10.167.208.2210.167.208.22
2410.167.208.23/3210.167.208.23 – 10.167.208.2310.167.208.23
2510.167.208.24/3210.167.208.24 – 10.167.208.2410.167.208.24
2610.167.208.25/3210.167.208.25 – 10.167.208.2510.167.208.25
2710.167.208.26/3210.167.208.26 – 10.167.208.2610.167.208.26
2810.167.208.27/3210.167.208.27 – 10.167.208.2710.167.208.27
2910.167.208.28/3210.167.208.28 – 10.167.208.2810.167.208.28
3010.167.208.29/3210.167.208.29 – 10.167.208.2910.167.208.29
3110.167.208.30/3210.167.208.30 – 10.167.208.3010.167.208.30
3210.167.208.31/3210.167.208.31 – 10.167.208.3110.167.208.31
3310.167.208.32/3210.167.208.32 – 10.167.208.3210.167.208.32
3410.167.208.33/3210.167.208.33 – 10.167.208.3310.167.208.33
3510.167.208.34/3210.167.208.34 – 10.167.208.3410.167.208.34
3610.167.208.35/3210.167.208.35 – 10.167.208.3510.167.208.35
3710.167.208.36/3210.167.208.36 – 10.167.208.3610.167.208.36
3810.167.208.37/3210.167.208.37 – 10.167.208.3710.167.208.37
3910.167.208.38/3210.167.208.38 – 10.167.208.3810.167.208.38
4010.167.208.39/3210.167.208.39 – 10.167.208.3910.167.208.39
4110.167.208.40/3210.167.208.40 – 10.167.208.4010.167.208.40
4210.167.208.41/3210.167.208.41 – 10.167.208.4110.167.208.41
4310.167.208.42/3210.167.208.42 – 10.167.208.4210.167.208.42
4410.167.208.43/3210.167.208.43 – 10.167.208.4310.167.208.43
4510.167.208.44/3210.167.208.44 – 10.167.208.4410.167.208.44
4610.167.208.45/3210.167.208.45 – 10.167.208.4510.167.208.45
4710.167.208.46/3210.167.208.46 – 10.167.208.4610.167.208.46
4810.167.208.47/3210.167.208.47 – 10.167.208.4710.167.208.47
4910.167.208.48/3210.167.208.48 – 10.167.208.4810.167.208.48
5010.167.208.49/3210.167.208.49 – 10.167.208.4910.167.208.49
5110.167.208.50/3210.167.208.50 – 10.167.208.5010.167.208.50
5210.167.208.51/3210.167.208.51 – 10.167.208.5110.167.208.51
5310.167.208.52/3210.167.208.52 – 10.167.208.5210.167.208.52
5410.167.208.53/3210.167.208.53 – 10.167.208.5310.167.208.53
5510.167.208.54/3210.167.208.54 – 10.167.208.5410.167.208.54
5610.167.208.55/3210.167.208.55 – 10.167.208.5510.167.208.55
5710.167.208.56/3210.167.208.56 – 10.167.208.5610.167.208.56
5810.167.208.57/3210.167.208.57 – 10.167.208.5710.167.208.57
5910.167.208.58/3210.167.208.58 – 10.167.208.5810.167.208.58
6010.167.208.59/3210.167.208.59 – 10.167.208.5910.167.208.59
6110.167.208.60/3210.167.208.60 – 10.167.208.6010.167.208.60
6210.167.208.61/3210.167.208.61 – 10.167.208.6110.167.208.61
6310.167.208.62/3210.167.208.62 – 10.167.208.6210.167.208.62
6410.167.208.63/3210.167.208.63 – 10.167.208.6310.167.208.63
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 →