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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)10.76.100.0/26
network10.76.100.0/26
broadcast10.76.100.63
first host10.76.100.1
last host10.76.100.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.76.100.0/26
address00001010.01001100.01100100.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001100.01100100.00000000
broadcast00001010.01001100.01100100.00111111
green = network part, grey = host part
hex0x0a4c6400
decimal172778496
reverse dns0.100.76.10.in-addr.arpa
ipv4-mapped::ffff:a4c:6400

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.76.100.0/3210.76.100.0 – 10.76.100.010.76.100.0
210.76.100.1/3210.76.100.1 – 10.76.100.110.76.100.1
310.76.100.2/3210.76.100.2 – 10.76.100.210.76.100.2
410.76.100.3/3210.76.100.3 – 10.76.100.310.76.100.3
510.76.100.4/3210.76.100.4 – 10.76.100.410.76.100.4
610.76.100.5/3210.76.100.5 – 10.76.100.510.76.100.5
710.76.100.6/3210.76.100.6 – 10.76.100.610.76.100.6
810.76.100.7/3210.76.100.7 – 10.76.100.710.76.100.7
910.76.100.8/3210.76.100.8 – 10.76.100.810.76.100.8
1010.76.100.9/3210.76.100.9 – 10.76.100.910.76.100.9
1110.76.100.10/3210.76.100.10 – 10.76.100.1010.76.100.10
1210.76.100.11/3210.76.100.11 – 10.76.100.1110.76.100.11
1310.76.100.12/3210.76.100.12 – 10.76.100.1210.76.100.12
1410.76.100.13/3210.76.100.13 – 10.76.100.1310.76.100.13
1510.76.100.14/3210.76.100.14 – 10.76.100.1410.76.100.14
1610.76.100.15/3210.76.100.15 – 10.76.100.1510.76.100.15
1710.76.100.16/3210.76.100.16 – 10.76.100.1610.76.100.16
1810.76.100.17/3210.76.100.17 – 10.76.100.1710.76.100.17
1910.76.100.18/3210.76.100.18 – 10.76.100.1810.76.100.18
2010.76.100.19/3210.76.100.19 – 10.76.100.1910.76.100.19
2110.76.100.20/3210.76.100.20 – 10.76.100.2010.76.100.20
2210.76.100.21/3210.76.100.21 – 10.76.100.2110.76.100.21
2310.76.100.22/3210.76.100.22 – 10.76.100.2210.76.100.22
2410.76.100.23/3210.76.100.23 – 10.76.100.2310.76.100.23
2510.76.100.24/3210.76.100.24 – 10.76.100.2410.76.100.24
2610.76.100.25/3210.76.100.25 – 10.76.100.2510.76.100.25
2710.76.100.26/3210.76.100.26 – 10.76.100.2610.76.100.26
2810.76.100.27/3210.76.100.27 – 10.76.100.2710.76.100.27
2910.76.100.28/3210.76.100.28 – 10.76.100.2810.76.100.28
3010.76.100.29/3210.76.100.29 – 10.76.100.2910.76.100.29
3110.76.100.30/3210.76.100.30 – 10.76.100.3010.76.100.30
3210.76.100.31/3210.76.100.31 – 10.76.100.3110.76.100.31
3310.76.100.32/3210.76.100.32 – 10.76.100.3210.76.100.32
3410.76.100.33/3210.76.100.33 – 10.76.100.3310.76.100.33
3510.76.100.34/3210.76.100.34 – 10.76.100.3410.76.100.34
3610.76.100.35/3210.76.100.35 – 10.76.100.3510.76.100.35
3710.76.100.36/3210.76.100.36 – 10.76.100.3610.76.100.36
3810.76.100.37/3210.76.100.37 – 10.76.100.3710.76.100.37
3910.76.100.38/3210.76.100.38 – 10.76.100.3810.76.100.38
4010.76.100.39/3210.76.100.39 – 10.76.100.3910.76.100.39
4110.76.100.40/3210.76.100.40 – 10.76.100.4010.76.100.40
4210.76.100.41/3210.76.100.41 – 10.76.100.4110.76.100.41
4310.76.100.42/3210.76.100.42 – 10.76.100.4210.76.100.42
4410.76.100.43/3210.76.100.43 – 10.76.100.4310.76.100.43
4510.76.100.44/3210.76.100.44 – 10.76.100.4410.76.100.44
4610.76.100.45/3210.76.100.45 – 10.76.100.4510.76.100.45
4710.76.100.46/3210.76.100.46 – 10.76.100.4610.76.100.46
4810.76.100.47/3210.76.100.47 – 10.76.100.4710.76.100.47
4910.76.100.48/3210.76.100.48 – 10.76.100.4810.76.100.48
5010.76.100.49/3210.76.100.49 – 10.76.100.4910.76.100.49
5110.76.100.50/3210.76.100.50 – 10.76.100.5010.76.100.50
5210.76.100.51/3210.76.100.51 – 10.76.100.5110.76.100.51
5310.76.100.52/3210.76.100.52 – 10.76.100.5210.76.100.52
5410.76.100.53/3210.76.100.53 – 10.76.100.5310.76.100.53
5510.76.100.54/3210.76.100.54 – 10.76.100.5410.76.100.54
5610.76.100.55/3210.76.100.55 – 10.76.100.5510.76.100.55
5710.76.100.56/3210.76.100.56 – 10.76.100.5610.76.100.56
5810.76.100.57/3210.76.100.57 – 10.76.100.5710.76.100.57
5910.76.100.58/3210.76.100.58 – 10.76.100.5810.76.100.58
6010.76.100.59/3210.76.100.59 – 10.76.100.5910.76.100.59
6110.76.100.60/3210.76.100.60 – 10.76.100.6010.76.100.60
6210.76.100.61/3210.76.100.61 – 10.76.100.6110.76.100.61
6310.76.100.62/3210.76.100.62 – 10.76.100.6210.76.100.62
6410.76.100.63/3210.76.100.63 – 10.76.100.6310.76.100.63
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 →