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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)10.3.82.0/26
network10.3.82.0/26
broadcast10.3.82.63
first host10.3.82.1
last host10.3.82.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.82.0/26
address00001010.00000011.01010010.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.01010010.00000000
broadcast00001010.00000011.01010010.00111111
green = network part, grey = host part
hex0x0a035200
decimal167989760
reverse dns0.82.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:5200

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.82.0/3210.3.82.0 – 10.3.82.010.3.82.0
210.3.82.1/3210.3.82.1 – 10.3.82.110.3.82.1
310.3.82.2/3210.3.82.2 – 10.3.82.210.3.82.2
410.3.82.3/3210.3.82.3 – 10.3.82.310.3.82.3
510.3.82.4/3210.3.82.4 – 10.3.82.410.3.82.4
610.3.82.5/3210.3.82.5 – 10.3.82.510.3.82.5
710.3.82.6/3210.3.82.6 – 10.3.82.610.3.82.6
810.3.82.7/3210.3.82.7 – 10.3.82.710.3.82.7
910.3.82.8/3210.3.82.8 – 10.3.82.810.3.82.8
1010.3.82.9/3210.3.82.9 – 10.3.82.910.3.82.9
1110.3.82.10/3210.3.82.10 – 10.3.82.1010.3.82.10
1210.3.82.11/3210.3.82.11 – 10.3.82.1110.3.82.11
1310.3.82.12/3210.3.82.12 – 10.3.82.1210.3.82.12
1410.3.82.13/3210.3.82.13 – 10.3.82.1310.3.82.13
1510.3.82.14/3210.3.82.14 – 10.3.82.1410.3.82.14
1610.3.82.15/3210.3.82.15 – 10.3.82.1510.3.82.15
1710.3.82.16/3210.3.82.16 – 10.3.82.1610.3.82.16
1810.3.82.17/3210.3.82.17 – 10.3.82.1710.3.82.17
1910.3.82.18/3210.3.82.18 – 10.3.82.1810.3.82.18
2010.3.82.19/3210.3.82.19 – 10.3.82.1910.3.82.19
2110.3.82.20/3210.3.82.20 – 10.3.82.2010.3.82.20
2210.3.82.21/3210.3.82.21 – 10.3.82.2110.3.82.21
2310.3.82.22/3210.3.82.22 – 10.3.82.2210.3.82.22
2410.3.82.23/3210.3.82.23 – 10.3.82.2310.3.82.23
2510.3.82.24/3210.3.82.24 – 10.3.82.2410.3.82.24
2610.3.82.25/3210.3.82.25 – 10.3.82.2510.3.82.25
2710.3.82.26/3210.3.82.26 – 10.3.82.2610.3.82.26
2810.3.82.27/3210.3.82.27 – 10.3.82.2710.3.82.27
2910.3.82.28/3210.3.82.28 – 10.3.82.2810.3.82.28
3010.3.82.29/3210.3.82.29 – 10.3.82.2910.3.82.29
3110.3.82.30/3210.3.82.30 – 10.3.82.3010.3.82.30
3210.3.82.31/3210.3.82.31 – 10.3.82.3110.3.82.31
3310.3.82.32/3210.3.82.32 – 10.3.82.3210.3.82.32
3410.3.82.33/3210.3.82.33 – 10.3.82.3310.3.82.33
3510.3.82.34/3210.3.82.34 – 10.3.82.3410.3.82.34
3610.3.82.35/3210.3.82.35 – 10.3.82.3510.3.82.35
3710.3.82.36/3210.3.82.36 – 10.3.82.3610.3.82.36
3810.3.82.37/3210.3.82.37 – 10.3.82.3710.3.82.37
3910.3.82.38/3210.3.82.38 – 10.3.82.3810.3.82.38
4010.3.82.39/3210.3.82.39 – 10.3.82.3910.3.82.39
4110.3.82.40/3210.3.82.40 – 10.3.82.4010.3.82.40
4210.3.82.41/3210.3.82.41 – 10.3.82.4110.3.82.41
4310.3.82.42/3210.3.82.42 – 10.3.82.4210.3.82.42
4410.3.82.43/3210.3.82.43 – 10.3.82.4310.3.82.43
4510.3.82.44/3210.3.82.44 – 10.3.82.4410.3.82.44
4610.3.82.45/3210.3.82.45 – 10.3.82.4510.3.82.45
4710.3.82.46/3210.3.82.46 – 10.3.82.4610.3.82.46
4810.3.82.47/3210.3.82.47 – 10.3.82.4710.3.82.47
4910.3.82.48/3210.3.82.48 – 10.3.82.4810.3.82.48
5010.3.82.49/3210.3.82.49 – 10.3.82.4910.3.82.49
5110.3.82.50/3210.3.82.50 – 10.3.82.5010.3.82.50
5210.3.82.51/3210.3.82.51 – 10.3.82.5110.3.82.51
5310.3.82.52/3210.3.82.52 – 10.3.82.5210.3.82.52
5410.3.82.53/3210.3.82.53 – 10.3.82.5310.3.82.53
5510.3.82.54/3210.3.82.54 – 10.3.82.5410.3.82.54
5610.3.82.55/3210.3.82.55 – 10.3.82.5510.3.82.55
5710.3.82.56/3210.3.82.56 – 10.3.82.5610.3.82.56
5810.3.82.57/3210.3.82.57 – 10.3.82.5710.3.82.57
5910.3.82.58/3210.3.82.58 – 10.3.82.5810.3.82.58
6010.3.82.59/3210.3.82.59 – 10.3.82.5910.3.82.59
6110.3.82.60/3210.3.82.60 – 10.3.82.6010.3.82.60
6210.3.82.61/3210.3.82.61 – 10.3.82.6110.3.82.61
6310.3.82.62/3210.3.82.62 – 10.3.82.6210.3.82.62
6410.3.82.63/3210.3.82.63 – 10.3.82.6310.3.82.63
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 →