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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)10.4.170.0/26
network10.4.170.0/26
broadcast10.4.170.63
first host10.4.170.1
last host10.4.170.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.4.170.0/26
address00001010.00000100.10101010.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000100.10101010.00000000
broadcast00001010.00000100.10101010.00111111
green = network part, grey = host part
hex0x0a04aa00
decimal168077824
reverse dns0.170.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:aa00

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.170.0/3210.4.170.0 – 10.4.170.010.4.170.0
210.4.170.1/3210.4.170.1 – 10.4.170.110.4.170.1
310.4.170.2/3210.4.170.2 – 10.4.170.210.4.170.2
410.4.170.3/3210.4.170.3 – 10.4.170.310.4.170.3
510.4.170.4/3210.4.170.4 – 10.4.170.410.4.170.4
610.4.170.5/3210.4.170.5 – 10.4.170.510.4.170.5
710.4.170.6/3210.4.170.6 – 10.4.170.610.4.170.6
810.4.170.7/3210.4.170.7 – 10.4.170.710.4.170.7
910.4.170.8/3210.4.170.8 – 10.4.170.810.4.170.8
1010.4.170.9/3210.4.170.9 – 10.4.170.910.4.170.9
1110.4.170.10/3210.4.170.10 – 10.4.170.1010.4.170.10
1210.4.170.11/3210.4.170.11 – 10.4.170.1110.4.170.11
1310.4.170.12/3210.4.170.12 – 10.4.170.1210.4.170.12
1410.4.170.13/3210.4.170.13 – 10.4.170.1310.4.170.13
1510.4.170.14/3210.4.170.14 – 10.4.170.1410.4.170.14
1610.4.170.15/3210.4.170.15 – 10.4.170.1510.4.170.15
1710.4.170.16/3210.4.170.16 – 10.4.170.1610.4.170.16
1810.4.170.17/3210.4.170.17 – 10.4.170.1710.4.170.17
1910.4.170.18/3210.4.170.18 – 10.4.170.1810.4.170.18
2010.4.170.19/3210.4.170.19 – 10.4.170.1910.4.170.19
2110.4.170.20/3210.4.170.20 – 10.4.170.2010.4.170.20
2210.4.170.21/3210.4.170.21 – 10.4.170.2110.4.170.21
2310.4.170.22/3210.4.170.22 – 10.4.170.2210.4.170.22
2410.4.170.23/3210.4.170.23 – 10.4.170.2310.4.170.23
2510.4.170.24/3210.4.170.24 – 10.4.170.2410.4.170.24
2610.4.170.25/3210.4.170.25 – 10.4.170.2510.4.170.25
2710.4.170.26/3210.4.170.26 – 10.4.170.2610.4.170.26
2810.4.170.27/3210.4.170.27 – 10.4.170.2710.4.170.27
2910.4.170.28/3210.4.170.28 – 10.4.170.2810.4.170.28
3010.4.170.29/3210.4.170.29 – 10.4.170.2910.4.170.29
3110.4.170.30/3210.4.170.30 – 10.4.170.3010.4.170.30
3210.4.170.31/3210.4.170.31 – 10.4.170.3110.4.170.31
3310.4.170.32/3210.4.170.32 – 10.4.170.3210.4.170.32
3410.4.170.33/3210.4.170.33 – 10.4.170.3310.4.170.33
3510.4.170.34/3210.4.170.34 – 10.4.170.3410.4.170.34
3610.4.170.35/3210.4.170.35 – 10.4.170.3510.4.170.35
3710.4.170.36/3210.4.170.36 – 10.4.170.3610.4.170.36
3810.4.170.37/3210.4.170.37 – 10.4.170.3710.4.170.37
3910.4.170.38/3210.4.170.38 – 10.4.170.3810.4.170.38
4010.4.170.39/3210.4.170.39 – 10.4.170.3910.4.170.39
4110.4.170.40/3210.4.170.40 – 10.4.170.4010.4.170.40
4210.4.170.41/3210.4.170.41 – 10.4.170.4110.4.170.41
4310.4.170.42/3210.4.170.42 – 10.4.170.4210.4.170.42
4410.4.170.43/3210.4.170.43 – 10.4.170.4310.4.170.43
4510.4.170.44/3210.4.170.44 – 10.4.170.4410.4.170.44
4610.4.170.45/3210.4.170.45 – 10.4.170.4510.4.170.45
4710.4.170.46/3210.4.170.46 – 10.4.170.4610.4.170.46
4810.4.170.47/3210.4.170.47 – 10.4.170.4710.4.170.47
4910.4.170.48/3210.4.170.48 – 10.4.170.4810.4.170.48
5010.4.170.49/3210.4.170.49 – 10.4.170.4910.4.170.49
5110.4.170.50/3210.4.170.50 – 10.4.170.5010.4.170.50
5210.4.170.51/3210.4.170.51 – 10.4.170.5110.4.170.51
5310.4.170.52/3210.4.170.52 – 10.4.170.5210.4.170.52
5410.4.170.53/3210.4.170.53 – 10.4.170.5310.4.170.53
5510.4.170.54/3210.4.170.54 – 10.4.170.5410.4.170.54
5610.4.170.55/3210.4.170.55 – 10.4.170.5510.4.170.55
5710.4.170.56/3210.4.170.56 – 10.4.170.5610.4.170.56
5810.4.170.57/3210.4.170.57 – 10.4.170.5710.4.170.57
5910.4.170.58/3210.4.170.58 – 10.4.170.5810.4.170.58
6010.4.170.59/3210.4.170.59 – 10.4.170.5910.4.170.59
6110.4.170.60/3210.4.170.60 – 10.4.170.6010.4.170.60
6210.4.170.61/3210.4.170.61 – 10.4.170.6110.4.170.61
6310.4.170.62/3210.4.170.62 – 10.4.170.6210.4.170.62
6410.4.170.63/3210.4.170.63 – 10.4.170.6310.4.170.63
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 →