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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)10.36.4.0/26
network10.36.4.0/26
broadcast10.36.4.63
first host10.36.4.1
last host10.36.4.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.36.4.0/26
address00001010.00100100.00000100.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00100100.00000100.00000000
broadcast00001010.00100100.00000100.00111111
green = network part, grey = host part
hex0x0a240400
decimal170132480
reverse dns0.4.36.10.in-addr.arpa
ipv4-mapped::ffff:a24:400

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.36.4.0/3210.36.4.0 – 10.36.4.010.36.4.0
210.36.4.1/3210.36.4.1 – 10.36.4.110.36.4.1
310.36.4.2/3210.36.4.2 – 10.36.4.210.36.4.2
410.36.4.3/3210.36.4.3 – 10.36.4.310.36.4.3
510.36.4.4/3210.36.4.4 – 10.36.4.410.36.4.4
610.36.4.5/3210.36.4.5 – 10.36.4.510.36.4.5
710.36.4.6/3210.36.4.6 – 10.36.4.610.36.4.6
810.36.4.7/3210.36.4.7 – 10.36.4.710.36.4.7
910.36.4.8/3210.36.4.8 – 10.36.4.810.36.4.8
1010.36.4.9/3210.36.4.9 – 10.36.4.910.36.4.9
1110.36.4.10/3210.36.4.10 – 10.36.4.1010.36.4.10
1210.36.4.11/3210.36.4.11 – 10.36.4.1110.36.4.11
1310.36.4.12/3210.36.4.12 – 10.36.4.1210.36.4.12
1410.36.4.13/3210.36.4.13 – 10.36.4.1310.36.4.13
1510.36.4.14/3210.36.4.14 – 10.36.4.1410.36.4.14
1610.36.4.15/3210.36.4.15 – 10.36.4.1510.36.4.15
1710.36.4.16/3210.36.4.16 – 10.36.4.1610.36.4.16
1810.36.4.17/3210.36.4.17 – 10.36.4.1710.36.4.17
1910.36.4.18/3210.36.4.18 – 10.36.4.1810.36.4.18
2010.36.4.19/3210.36.4.19 – 10.36.4.1910.36.4.19
2110.36.4.20/3210.36.4.20 – 10.36.4.2010.36.4.20
2210.36.4.21/3210.36.4.21 – 10.36.4.2110.36.4.21
2310.36.4.22/3210.36.4.22 – 10.36.4.2210.36.4.22
2410.36.4.23/3210.36.4.23 – 10.36.4.2310.36.4.23
2510.36.4.24/3210.36.4.24 – 10.36.4.2410.36.4.24
2610.36.4.25/3210.36.4.25 – 10.36.4.2510.36.4.25
2710.36.4.26/3210.36.4.26 – 10.36.4.2610.36.4.26
2810.36.4.27/3210.36.4.27 – 10.36.4.2710.36.4.27
2910.36.4.28/3210.36.4.28 – 10.36.4.2810.36.4.28
3010.36.4.29/3210.36.4.29 – 10.36.4.2910.36.4.29
3110.36.4.30/3210.36.4.30 – 10.36.4.3010.36.4.30
3210.36.4.31/3210.36.4.31 – 10.36.4.3110.36.4.31
3310.36.4.32/3210.36.4.32 – 10.36.4.3210.36.4.32
3410.36.4.33/3210.36.4.33 – 10.36.4.3310.36.4.33
3510.36.4.34/3210.36.4.34 – 10.36.4.3410.36.4.34
3610.36.4.35/3210.36.4.35 – 10.36.4.3510.36.4.35
3710.36.4.36/3210.36.4.36 – 10.36.4.3610.36.4.36
3810.36.4.37/3210.36.4.37 – 10.36.4.3710.36.4.37
3910.36.4.38/3210.36.4.38 – 10.36.4.3810.36.4.38
4010.36.4.39/3210.36.4.39 – 10.36.4.3910.36.4.39
4110.36.4.40/3210.36.4.40 – 10.36.4.4010.36.4.40
4210.36.4.41/3210.36.4.41 – 10.36.4.4110.36.4.41
4310.36.4.42/3210.36.4.42 – 10.36.4.4210.36.4.42
4410.36.4.43/3210.36.4.43 – 10.36.4.4310.36.4.43
4510.36.4.44/3210.36.4.44 – 10.36.4.4410.36.4.44
4610.36.4.45/3210.36.4.45 – 10.36.4.4510.36.4.45
4710.36.4.46/3210.36.4.46 – 10.36.4.4610.36.4.46
4810.36.4.47/3210.36.4.47 – 10.36.4.4710.36.4.47
4910.36.4.48/3210.36.4.48 – 10.36.4.4810.36.4.48
5010.36.4.49/3210.36.4.49 – 10.36.4.4910.36.4.49
5110.36.4.50/3210.36.4.50 – 10.36.4.5010.36.4.50
5210.36.4.51/3210.36.4.51 – 10.36.4.5110.36.4.51
5310.36.4.52/3210.36.4.52 – 10.36.4.5210.36.4.52
5410.36.4.53/3210.36.4.53 – 10.36.4.5310.36.4.53
5510.36.4.54/3210.36.4.54 – 10.36.4.5410.36.4.54
5610.36.4.55/3210.36.4.55 – 10.36.4.5510.36.4.55
5710.36.4.56/3210.36.4.56 – 10.36.4.5610.36.4.56
5810.36.4.57/3210.36.4.57 – 10.36.4.5710.36.4.57
5910.36.4.58/3210.36.4.58 – 10.36.4.5810.36.4.58
6010.36.4.59/3210.36.4.59 – 10.36.4.5910.36.4.59
6110.36.4.60/3210.36.4.60 – 10.36.4.6010.36.4.60
6210.36.4.61/3210.36.4.61 – 10.36.4.6110.36.4.61
6310.36.4.62/3210.36.4.62 – 10.36.4.6210.36.4.62
6410.36.4.63/3210.36.4.63 – 10.36.4.6310.36.4.63
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 →