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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)10.26.87.0/26
network10.26.87.0/26
broadcast10.26.87.63
first host10.26.87.1
last host10.26.87.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.26.87.0/26
address00001010.00011010.01010111.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00011010.01010111.00000000
broadcast00001010.00011010.01010111.00111111
green = network part, grey = host part
hex0x0a1a5700
decimal169498368
reverse dns0.87.26.10.in-addr.arpa
ipv4-mapped::ffff:a1a:5700

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.26.87.0/3210.26.87.0 – 10.26.87.010.26.87.0
210.26.87.1/3210.26.87.1 – 10.26.87.110.26.87.1
310.26.87.2/3210.26.87.2 – 10.26.87.210.26.87.2
410.26.87.3/3210.26.87.3 – 10.26.87.310.26.87.3
510.26.87.4/3210.26.87.4 – 10.26.87.410.26.87.4
610.26.87.5/3210.26.87.5 – 10.26.87.510.26.87.5
710.26.87.6/3210.26.87.6 – 10.26.87.610.26.87.6
810.26.87.7/3210.26.87.7 – 10.26.87.710.26.87.7
910.26.87.8/3210.26.87.8 – 10.26.87.810.26.87.8
1010.26.87.9/3210.26.87.9 – 10.26.87.910.26.87.9
1110.26.87.10/3210.26.87.10 – 10.26.87.1010.26.87.10
1210.26.87.11/3210.26.87.11 – 10.26.87.1110.26.87.11
1310.26.87.12/3210.26.87.12 – 10.26.87.1210.26.87.12
1410.26.87.13/3210.26.87.13 – 10.26.87.1310.26.87.13
1510.26.87.14/3210.26.87.14 – 10.26.87.1410.26.87.14
1610.26.87.15/3210.26.87.15 – 10.26.87.1510.26.87.15
1710.26.87.16/3210.26.87.16 – 10.26.87.1610.26.87.16
1810.26.87.17/3210.26.87.17 – 10.26.87.1710.26.87.17
1910.26.87.18/3210.26.87.18 – 10.26.87.1810.26.87.18
2010.26.87.19/3210.26.87.19 – 10.26.87.1910.26.87.19
2110.26.87.20/3210.26.87.20 – 10.26.87.2010.26.87.20
2210.26.87.21/3210.26.87.21 – 10.26.87.2110.26.87.21
2310.26.87.22/3210.26.87.22 – 10.26.87.2210.26.87.22
2410.26.87.23/3210.26.87.23 – 10.26.87.2310.26.87.23
2510.26.87.24/3210.26.87.24 – 10.26.87.2410.26.87.24
2610.26.87.25/3210.26.87.25 – 10.26.87.2510.26.87.25
2710.26.87.26/3210.26.87.26 – 10.26.87.2610.26.87.26
2810.26.87.27/3210.26.87.27 – 10.26.87.2710.26.87.27
2910.26.87.28/3210.26.87.28 – 10.26.87.2810.26.87.28
3010.26.87.29/3210.26.87.29 – 10.26.87.2910.26.87.29
3110.26.87.30/3210.26.87.30 – 10.26.87.3010.26.87.30
3210.26.87.31/3210.26.87.31 – 10.26.87.3110.26.87.31
3310.26.87.32/3210.26.87.32 – 10.26.87.3210.26.87.32
3410.26.87.33/3210.26.87.33 – 10.26.87.3310.26.87.33
3510.26.87.34/3210.26.87.34 – 10.26.87.3410.26.87.34
3610.26.87.35/3210.26.87.35 – 10.26.87.3510.26.87.35
3710.26.87.36/3210.26.87.36 – 10.26.87.3610.26.87.36
3810.26.87.37/3210.26.87.37 – 10.26.87.3710.26.87.37
3910.26.87.38/3210.26.87.38 – 10.26.87.3810.26.87.38
4010.26.87.39/3210.26.87.39 – 10.26.87.3910.26.87.39
4110.26.87.40/3210.26.87.40 – 10.26.87.4010.26.87.40
4210.26.87.41/3210.26.87.41 – 10.26.87.4110.26.87.41
4310.26.87.42/3210.26.87.42 – 10.26.87.4210.26.87.42
4410.26.87.43/3210.26.87.43 – 10.26.87.4310.26.87.43
4510.26.87.44/3210.26.87.44 – 10.26.87.4410.26.87.44
4610.26.87.45/3210.26.87.45 – 10.26.87.4510.26.87.45
4710.26.87.46/3210.26.87.46 – 10.26.87.4610.26.87.46
4810.26.87.47/3210.26.87.47 – 10.26.87.4710.26.87.47
4910.26.87.48/3210.26.87.48 – 10.26.87.4810.26.87.48
5010.26.87.49/3210.26.87.49 – 10.26.87.4910.26.87.49
5110.26.87.50/3210.26.87.50 – 10.26.87.5010.26.87.50
5210.26.87.51/3210.26.87.51 – 10.26.87.5110.26.87.51
5310.26.87.52/3210.26.87.52 – 10.26.87.5210.26.87.52
5410.26.87.53/3210.26.87.53 – 10.26.87.5310.26.87.53
5510.26.87.54/3210.26.87.54 – 10.26.87.5410.26.87.54
5610.26.87.55/3210.26.87.55 – 10.26.87.5510.26.87.55
5710.26.87.56/3210.26.87.56 – 10.26.87.5610.26.87.56
5810.26.87.57/3210.26.87.57 – 10.26.87.5710.26.87.57
5910.26.87.58/3210.26.87.58 – 10.26.87.5810.26.87.58
6010.26.87.59/3210.26.87.59 – 10.26.87.5910.26.87.59
6110.26.87.60/3210.26.87.60 – 10.26.87.6010.26.87.60
6210.26.87.61/3210.26.87.61 – 10.26.87.6110.26.87.61
6310.26.87.62/3210.26.87.62 – 10.26.87.6210.26.87.62
6410.26.87.63/3210.26.87.63 – 10.26.87.6310.26.87.63
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 →