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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)10.13.191.0/26
network10.13.191.0/26
broadcast10.13.191.63
first host10.13.191.1
last host10.13.191.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.13.191.0/26
address00001010.00001101.10111111.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00001101.10111111.00000000
broadcast00001010.00001101.10111111.00111111
green = network part, grey = host part
hex0x0a0dbf00
decimal168673024
reverse dns0.191.13.10.in-addr.arpa
ipv4-mapped::ffff:a0d:bf00

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.13.191.0/3210.13.191.0 – 10.13.191.010.13.191.0
210.13.191.1/3210.13.191.1 – 10.13.191.110.13.191.1
310.13.191.2/3210.13.191.2 – 10.13.191.210.13.191.2
410.13.191.3/3210.13.191.3 – 10.13.191.310.13.191.3
510.13.191.4/3210.13.191.4 – 10.13.191.410.13.191.4
610.13.191.5/3210.13.191.5 – 10.13.191.510.13.191.5
710.13.191.6/3210.13.191.6 – 10.13.191.610.13.191.6
810.13.191.7/3210.13.191.7 – 10.13.191.710.13.191.7
910.13.191.8/3210.13.191.8 – 10.13.191.810.13.191.8
1010.13.191.9/3210.13.191.9 – 10.13.191.910.13.191.9
1110.13.191.10/3210.13.191.10 – 10.13.191.1010.13.191.10
1210.13.191.11/3210.13.191.11 – 10.13.191.1110.13.191.11
1310.13.191.12/3210.13.191.12 – 10.13.191.1210.13.191.12
1410.13.191.13/3210.13.191.13 – 10.13.191.1310.13.191.13
1510.13.191.14/3210.13.191.14 – 10.13.191.1410.13.191.14
1610.13.191.15/3210.13.191.15 – 10.13.191.1510.13.191.15
1710.13.191.16/3210.13.191.16 – 10.13.191.1610.13.191.16
1810.13.191.17/3210.13.191.17 – 10.13.191.1710.13.191.17
1910.13.191.18/3210.13.191.18 – 10.13.191.1810.13.191.18
2010.13.191.19/3210.13.191.19 – 10.13.191.1910.13.191.19
2110.13.191.20/3210.13.191.20 – 10.13.191.2010.13.191.20
2210.13.191.21/3210.13.191.21 – 10.13.191.2110.13.191.21
2310.13.191.22/3210.13.191.22 – 10.13.191.2210.13.191.22
2410.13.191.23/3210.13.191.23 – 10.13.191.2310.13.191.23
2510.13.191.24/3210.13.191.24 – 10.13.191.2410.13.191.24
2610.13.191.25/3210.13.191.25 – 10.13.191.2510.13.191.25
2710.13.191.26/3210.13.191.26 – 10.13.191.2610.13.191.26
2810.13.191.27/3210.13.191.27 – 10.13.191.2710.13.191.27
2910.13.191.28/3210.13.191.28 – 10.13.191.2810.13.191.28
3010.13.191.29/3210.13.191.29 – 10.13.191.2910.13.191.29
3110.13.191.30/3210.13.191.30 – 10.13.191.3010.13.191.30
3210.13.191.31/3210.13.191.31 – 10.13.191.3110.13.191.31
3310.13.191.32/3210.13.191.32 – 10.13.191.3210.13.191.32
3410.13.191.33/3210.13.191.33 – 10.13.191.3310.13.191.33
3510.13.191.34/3210.13.191.34 – 10.13.191.3410.13.191.34
3610.13.191.35/3210.13.191.35 – 10.13.191.3510.13.191.35
3710.13.191.36/3210.13.191.36 – 10.13.191.3610.13.191.36
3810.13.191.37/3210.13.191.37 – 10.13.191.3710.13.191.37
3910.13.191.38/3210.13.191.38 – 10.13.191.3810.13.191.38
4010.13.191.39/3210.13.191.39 – 10.13.191.3910.13.191.39
4110.13.191.40/3210.13.191.40 – 10.13.191.4010.13.191.40
4210.13.191.41/3210.13.191.41 – 10.13.191.4110.13.191.41
4310.13.191.42/3210.13.191.42 – 10.13.191.4210.13.191.42
4410.13.191.43/3210.13.191.43 – 10.13.191.4310.13.191.43
4510.13.191.44/3210.13.191.44 – 10.13.191.4410.13.191.44
4610.13.191.45/3210.13.191.45 – 10.13.191.4510.13.191.45
4710.13.191.46/3210.13.191.46 – 10.13.191.4610.13.191.46
4810.13.191.47/3210.13.191.47 – 10.13.191.4710.13.191.47
4910.13.191.48/3210.13.191.48 – 10.13.191.4810.13.191.48
5010.13.191.49/3210.13.191.49 – 10.13.191.4910.13.191.49
5110.13.191.50/3210.13.191.50 – 10.13.191.5010.13.191.50
5210.13.191.51/3210.13.191.51 – 10.13.191.5110.13.191.51
5310.13.191.52/3210.13.191.52 – 10.13.191.5210.13.191.52
5410.13.191.53/3210.13.191.53 – 10.13.191.5310.13.191.53
5510.13.191.54/3210.13.191.54 – 10.13.191.5410.13.191.54
5610.13.191.55/3210.13.191.55 – 10.13.191.5510.13.191.55
5710.13.191.56/3210.13.191.56 – 10.13.191.5610.13.191.56
5810.13.191.57/3210.13.191.57 – 10.13.191.5710.13.191.57
5910.13.191.58/3210.13.191.58 – 10.13.191.5810.13.191.58
6010.13.191.59/3210.13.191.59 – 10.13.191.5910.13.191.59
6110.13.191.60/3210.13.191.60 – 10.13.191.6010.13.191.60
6210.13.191.61/3210.13.191.61 – 10.13.191.6110.13.191.61
6310.13.191.62/3210.13.191.62 – 10.13.191.6210.13.191.62
6410.13.191.63/3210.13.191.63 – 10.13.191.6310.13.191.63
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 →