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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)10.78.29.0/26
network10.78.29.0/26
broadcast10.78.29.63
first host10.78.29.1
last host10.78.29.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.29.0/26
address00001010.01001110.00011101.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.00011101.00000000
broadcast00001010.01001110.00011101.00111111
green = network part, grey = host part
hex0x0a4e1d00
decimal172891392
reverse dns0.29.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:1d00

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.29.0/3210.78.29.0 – 10.78.29.010.78.29.0
210.78.29.1/3210.78.29.1 – 10.78.29.110.78.29.1
310.78.29.2/3210.78.29.2 – 10.78.29.210.78.29.2
410.78.29.3/3210.78.29.3 – 10.78.29.310.78.29.3
510.78.29.4/3210.78.29.4 – 10.78.29.410.78.29.4
610.78.29.5/3210.78.29.5 – 10.78.29.510.78.29.5
710.78.29.6/3210.78.29.6 – 10.78.29.610.78.29.6
810.78.29.7/3210.78.29.7 – 10.78.29.710.78.29.7
910.78.29.8/3210.78.29.8 – 10.78.29.810.78.29.8
1010.78.29.9/3210.78.29.9 – 10.78.29.910.78.29.9
1110.78.29.10/3210.78.29.10 – 10.78.29.1010.78.29.10
1210.78.29.11/3210.78.29.11 – 10.78.29.1110.78.29.11
1310.78.29.12/3210.78.29.12 – 10.78.29.1210.78.29.12
1410.78.29.13/3210.78.29.13 – 10.78.29.1310.78.29.13
1510.78.29.14/3210.78.29.14 – 10.78.29.1410.78.29.14
1610.78.29.15/3210.78.29.15 – 10.78.29.1510.78.29.15
1710.78.29.16/3210.78.29.16 – 10.78.29.1610.78.29.16
1810.78.29.17/3210.78.29.17 – 10.78.29.1710.78.29.17
1910.78.29.18/3210.78.29.18 – 10.78.29.1810.78.29.18
2010.78.29.19/3210.78.29.19 – 10.78.29.1910.78.29.19
2110.78.29.20/3210.78.29.20 – 10.78.29.2010.78.29.20
2210.78.29.21/3210.78.29.21 – 10.78.29.2110.78.29.21
2310.78.29.22/3210.78.29.22 – 10.78.29.2210.78.29.22
2410.78.29.23/3210.78.29.23 – 10.78.29.2310.78.29.23
2510.78.29.24/3210.78.29.24 – 10.78.29.2410.78.29.24
2610.78.29.25/3210.78.29.25 – 10.78.29.2510.78.29.25
2710.78.29.26/3210.78.29.26 – 10.78.29.2610.78.29.26
2810.78.29.27/3210.78.29.27 – 10.78.29.2710.78.29.27
2910.78.29.28/3210.78.29.28 – 10.78.29.2810.78.29.28
3010.78.29.29/3210.78.29.29 – 10.78.29.2910.78.29.29
3110.78.29.30/3210.78.29.30 – 10.78.29.3010.78.29.30
3210.78.29.31/3210.78.29.31 – 10.78.29.3110.78.29.31
3310.78.29.32/3210.78.29.32 – 10.78.29.3210.78.29.32
3410.78.29.33/3210.78.29.33 – 10.78.29.3310.78.29.33
3510.78.29.34/3210.78.29.34 – 10.78.29.3410.78.29.34
3610.78.29.35/3210.78.29.35 – 10.78.29.3510.78.29.35
3710.78.29.36/3210.78.29.36 – 10.78.29.3610.78.29.36
3810.78.29.37/3210.78.29.37 – 10.78.29.3710.78.29.37
3910.78.29.38/3210.78.29.38 – 10.78.29.3810.78.29.38
4010.78.29.39/3210.78.29.39 – 10.78.29.3910.78.29.39
4110.78.29.40/3210.78.29.40 – 10.78.29.4010.78.29.40
4210.78.29.41/3210.78.29.41 – 10.78.29.4110.78.29.41
4310.78.29.42/3210.78.29.42 – 10.78.29.4210.78.29.42
4410.78.29.43/3210.78.29.43 – 10.78.29.4310.78.29.43
4510.78.29.44/3210.78.29.44 – 10.78.29.4410.78.29.44
4610.78.29.45/3210.78.29.45 – 10.78.29.4510.78.29.45
4710.78.29.46/3210.78.29.46 – 10.78.29.4610.78.29.46
4810.78.29.47/3210.78.29.47 – 10.78.29.4710.78.29.47
4910.78.29.48/3210.78.29.48 – 10.78.29.4810.78.29.48
5010.78.29.49/3210.78.29.49 – 10.78.29.4910.78.29.49
5110.78.29.50/3210.78.29.50 – 10.78.29.5010.78.29.50
5210.78.29.51/3210.78.29.51 – 10.78.29.5110.78.29.51
5310.78.29.52/3210.78.29.52 – 10.78.29.5210.78.29.52
5410.78.29.53/3210.78.29.53 – 10.78.29.5310.78.29.53
5510.78.29.54/3210.78.29.54 – 10.78.29.5410.78.29.54
5610.78.29.55/3210.78.29.55 – 10.78.29.5510.78.29.55
5710.78.29.56/3210.78.29.56 – 10.78.29.5610.78.29.56
5810.78.29.57/3210.78.29.57 – 10.78.29.5710.78.29.57
5910.78.29.58/3210.78.29.58 – 10.78.29.5810.78.29.58
6010.78.29.59/3210.78.29.59 – 10.78.29.5910.78.29.59
6110.78.29.60/3210.78.29.60 – 10.78.29.6010.78.29.60
6210.78.29.61/3210.78.29.61 – 10.78.29.6110.78.29.61
6310.78.29.62/3210.78.29.62 – 10.78.29.6210.78.29.62
6410.78.29.63/3210.78.29.63 – 10.78.29.6310.78.29.63
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 →