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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)10.80.36.0/26
network10.80.36.0/26
broadcast10.80.36.63
first host10.80.36.1
last host10.80.36.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.80.36.0/26
address00001010.01010000.00100100.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01010000.00100100.00000000
broadcast00001010.01010000.00100100.00111111
green = network part, grey = host part
hex0x0a502400
decimal173024256
reverse dns0.36.80.10.in-addr.arpa
ipv4-mapped::ffff:a50:2400

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.80.36.0/3210.80.36.0 – 10.80.36.010.80.36.0
210.80.36.1/3210.80.36.1 – 10.80.36.110.80.36.1
310.80.36.2/3210.80.36.2 – 10.80.36.210.80.36.2
410.80.36.3/3210.80.36.3 – 10.80.36.310.80.36.3
510.80.36.4/3210.80.36.4 – 10.80.36.410.80.36.4
610.80.36.5/3210.80.36.5 – 10.80.36.510.80.36.5
710.80.36.6/3210.80.36.6 – 10.80.36.610.80.36.6
810.80.36.7/3210.80.36.7 – 10.80.36.710.80.36.7
910.80.36.8/3210.80.36.8 – 10.80.36.810.80.36.8
1010.80.36.9/3210.80.36.9 – 10.80.36.910.80.36.9
1110.80.36.10/3210.80.36.10 – 10.80.36.1010.80.36.10
1210.80.36.11/3210.80.36.11 – 10.80.36.1110.80.36.11
1310.80.36.12/3210.80.36.12 – 10.80.36.1210.80.36.12
1410.80.36.13/3210.80.36.13 – 10.80.36.1310.80.36.13
1510.80.36.14/3210.80.36.14 – 10.80.36.1410.80.36.14
1610.80.36.15/3210.80.36.15 – 10.80.36.1510.80.36.15
1710.80.36.16/3210.80.36.16 – 10.80.36.1610.80.36.16
1810.80.36.17/3210.80.36.17 – 10.80.36.1710.80.36.17
1910.80.36.18/3210.80.36.18 – 10.80.36.1810.80.36.18
2010.80.36.19/3210.80.36.19 – 10.80.36.1910.80.36.19
2110.80.36.20/3210.80.36.20 – 10.80.36.2010.80.36.20
2210.80.36.21/3210.80.36.21 – 10.80.36.2110.80.36.21
2310.80.36.22/3210.80.36.22 – 10.80.36.2210.80.36.22
2410.80.36.23/3210.80.36.23 – 10.80.36.2310.80.36.23
2510.80.36.24/3210.80.36.24 – 10.80.36.2410.80.36.24
2610.80.36.25/3210.80.36.25 – 10.80.36.2510.80.36.25
2710.80.36.26/3210.80.36.26 – 10.80.36.2610.80.36.26
2810.80.36.27/3210.80.36.27 – 10.80.36.2710.80.36.27
2910.80.36.28/3210.80.36.28 – 10.80.36.2810.80.36.28
3010.80.36.29/3210.80.36.29 – 10.80.36.2910.80.36.29
3110.80.36.30/3210.80.36.30 – 10.80.36.3010.80.36.30
3210.80.36.31/3210.80.36.31 – 10.80.36.3110.80.36.31
3310.80.36.32/3210.80.36.32 – 10.80.36.3210.80.36.32
3410.80.36.33/3210.80.36.33 – 10.80.36.3310.80.36.33
3510.80.36.34/3210.80.36.34 – 10.80.36.3410.80.36.34
3610.80.36.35/3210.80.36.35 – 10.80.36.3510.80.36.35
3710.80.36.36/3210.80.36.36 – 10.80.36.3610.80.36.36
3810.80.36.37/3210.80.36.37 – 10.80.36.3710.80.36.37
3910.80.36.38/3210.80.36.38 – 10.80.36.3810.80.36.38
4010.80.36.39/3210.80.36.39 – 10.80.36.3910.80.36.39
4110.80.36.40/3210.80.36.40 – 10.80.36.4010.80.36.40
4210.80.36.41/3210.80.36.41 – 10.80.36.4110.80.36.41
4310.80.36.42/3210.80.36.42 – 10.80.36.4210.80.36.42
4410.80.36.43/3210.80.36.43 – 10.80.36.4310.80.36.43
4510.80.36.44/3210.80.36.44 – 10.80.36.4410.80.36.44
4610.80.36.45/3210.80.36.45 – 10.80.36.4510.80.36.45
4710.80.36.46/3210.80.36.46 – 10.80.36.4610.80.36.46
4810.80.36.47/3210.80.36.47 – 10.80.36.4710.80.36.47
4910.80.36.48/3210.80.36.48 – 10.80.36.4810.80.36.48
5010.80.36.49/3210.80.36.49 – 10.80.36.4910.80.36.49
5110.80.36.50/3210.80.36.50 – 10.80.36.5010.80.36.50
5210.80.36.51/3210.80.36.51 – 10.80.36.5110.80.36.51
5310.80.36.52/3210.80.36.52 – 10.80.36.5210.80.36.52
5410.80.36.53/3210.80.36.53 – 10.80.36.5310.80.36.53
5510.80.36.54/3210.80.36.54 – 10.80.36.5410.80.36.54
5610.80.36.55/3210.80.36.55 – 10.80.36.5510.80.36.55
5710.80.36.56/3210.80.36.56 – 10.80.36.5610.80.36.56
5810.80.36.57/3210.80.36.57 – 10.80.36.5710.80.36.57
5910.80.36.58/3210.80.36.58 – 10.80.36.5810.80.36.58
6010.80.36.59/3210.80.36.59 – 10.80.36.5910.80.36.59
6110.80.36.60/3210.80.36.60 – 10.80.36.6010.80.36.60
6210.80.36.61/3210.80.36.61 – 10.80.36.6110.80.36.61
6310.80.36.62/3210.80.36.62 – 10.80.36.6210.80.36.62
6410.80.36.63/3210.80.36.63 – 10.80.36.6310.80.36.63
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 →