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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)10.90.5.0/26
network10.90.5.0/26
broadcast10.90.5.63
first host10.90.5.1
last host10.90.5.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.90.5.0/26
address00001010.01011010.00000101.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01011010.00000101.00000000
broadcast00001010.01011010.00000101.00111111
green = network part, grey = host part
hex0x0a5a0500
decimal173671680
reverse dns0.5.90.10.in-addr.arpa
ipv4-mapped::ffff:a5a:500

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.90.5.0/3210.90.5.0 – 10.90.5.010.90.5.0
210.90.5.1/3210.90.5.1 – 10.90.5.110.90.5.1
310.90.5.2/3210.90.5.2 – 10.90.5.210.90.5.2
410.90.5.3/3210.90.5.3 – 10.90.5.310.90.5.3
510.90.5.4/3210.90.5.4 – 10.90.5.410.90.5.4
610.90.5.5/3210.90.5.5 – 10.90.5.510.90.5.5
710.90.5.6/3210.90.5.6 – 10.90.5.610.90.5.6
810.90.5.7/3210.90.5.7 – 10.90.5.710.90.5.7
910.90.5.8/3210.90.5.8 – 10.90.5.810.90.5.8
1010.90.5.9/3210.90.5.9 – 10.90.5.910.90.5.9
1110.90.5.10/3210.90.5.10 – 10.90.5.1010.90.5.10
1210.90.5.11/3210.90.5.11 – 10.90.5.1110.90.5.11
1310.90.5.12/3210.90.5.12 – 10.90.5.1210.90.5.12
1410.90.5.13/3210.90.5.13 – 10.90.5.1310.90.5.13
1510.90.5.14/3210.90.5.14 – 10.90.5.1410.90.5.14
1610.90.5.15/3210.90.5.15 – 10.90.5.1510.90.5.15
1710.90.5.16/3210.90.5.16 – 10.90.5.1610.90.5.16
1810.90.5.17/3210.90.5.17 – 10.90.5.1710.90.5.17
1910.90.5.18/3210.90.5.18 – 10.90.5.1810.90.5.18
2010.90.5.19/3210.90.5.19 – 10.90.5.1910.90.5.19
2110.90.5.20/3210.90.5.20 – 10.90.5.2010.90.5.20
2210.90.5.21/3210.90.5.21 – 10.90.5.2110.90.5.21
2310.90.5.22/3210.90.5.22 – 10.90.5.2210.90.5.22
2410.90.5.23/3210.90.5.23 – 10.90.5.2310.90.5.23
2510.90.5.24/3210.90.5.24 – 10.90.5.2410.90.5.24
2610.90.5.25/3210.90.5.25 – 10.90.5.2510.90.5.25
2710.90.5.26/3210.90.5.26 – 10.90.5.2610.90.5.26
2810.90.5.27/3210.90.5.27 – 10.90.5.2710.90.5.27
2910.90.5.28/3210.90.5.28 – 10.90.5.2810.90.5.28
3010.90.5.29/3210.90.5.29 – 10.90.5.2910.90.5.29
3110.90.5.30/3210.90.5.30 – 10.90.5.3010.90.5.30
3210.90.5.31/3210.90.5.31 – 10.90.5.3110.90.5.31
3310.90.5.32/3210.90.5.32 – 10.90.5.3210.90.5.32
3410.90.5.33/3210.90.5.33 – 10.90.5.3310.90.5.33
3510.90.5.34/3210.90.5.34 – 10.90.5.3410.90.5.34
3610.90.5.35/3210.90.5.35 – 10.90.5.3510.90.5.35
3710.90.5.36/3210.90.5.36 – 10.90.5.3610.90.5.36
3810.90.5.37/3210.90.5.37 – 10.90.5.3710.90.5.37
3910.90.5.38/3210.90.5.38 – 10.90.5.3810.90.5.38
4010.90.5.39/3210.90.5.39 – 10.90.5.3910.90.5.39
4110.90.5.40/3210.90.5.40 – 10.90.5.4010.90.5.40
4210.90.5.41/3210.90.5.41 – 10.90.5.4110.90.5.41
4310.90.5.42/3210.90.5.42 – 10.90.5.4210.90.5.42
4410.90.5.43/3210.90.5.43 – 10.90.5.4310.90.5.43
4510.90.5.44/3210.90.5.44 – 10.90.5.4410.90.5.44
4610.90.5.45/3210.90.5.45 – 10.90.5.4510.90.5.45
4710.90.5.46/3210.90.5.46 – 10.90.5.4610.90.5.46
4810.90.5.47/3210.90.5.47 – 10.90.5.4710.90.5.47
4910.90.5.48/3210.90.5.48 – 10.90.5.4810.90.5.48
5010.90.5.49/3210.90.5.49 – 10.90.5.4910.90.5.49
5110.90.5.50/3210.90.5.50 – 10.90.5.5010.90.5.50
5210.90.5.51/3210.90.5.51 – 10.90.5.5110.90.5.51
5310.90.5.52/3210.90.5.52 – 10.90.5.5210.90.5.52
5410.90.5.53/3210.90.5.53 – 10.90.5.5310.90.5.53
5510.90.5.54/3210.90.5.54 – 10.90.5.5410.90.5.54
5610.90.5.55/3210.90.5.55 – 10.90.5.5510.90.5.55
5710.90.5.56/3210.90.5.56 – 10.90.5.5610.90.5.56
5810.90.5.57/3210.90.5.57 – 10.90.5.5710.90.5.57
5910.90.5.58/3210.90.5.58 – 10.90.5.5810.90.5.58
6010.90.5.59/3210.90.5.59 – 10.90.5.5910.90.5.59
6110.90.5.60/3210.90.5.60 – 10.90.5.6010.90.5.60
6210.90.5.61/3210.90.5.61 – 10.90.5.6110.90.5.61
6310.90.5.62/3210.90.5.62 – 10.90.5.6210.90.5.62
6410.90.5.63/3210.90.5.63 – 10.90.5.6310.90.5.63
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 →