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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)10.45.78.0/26
network10.45.78.0/26
broadcast10.45.78.63
first host10.45.78.1
last host10.45.78.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.45.78.0/26
address00001010.00101101.01001110.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00101101.01001110.00000000
broadcast00001010.00101101.01001110.00111111
green = network part, grey = host part
hex0x0a2d4e00
decimal170741248
reverse dns0.78.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:4e00

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.45.78.0/3210.45.78.0 – 10.45.78.010.45.78.0
210.45.78.1/3210.45.78.1 – 10.45.78.110.45.78.1
310.45.78.2/3210.45.78.2 – 10.45.78.210.45.78.2
410.45.78.3/3210.45.78.3 – 10.45.78.310.45.78.3
510.45.78.4/3210.45.78.4 – 10.45.78.410.45.78.4
610.45.78.5/3210.45.78.5 – 10.45.78.510.45.78.5
710.45.78.6/3210.45.78.6 – 10.45.78.610.45.78.6
810.45.78.7/3210.45.78.7 – 10.45.78.710.45.78.7
910.45.78.8/3210.45.78.8 – 10.45.78.810.45.78.8
1010.45.78.9/3210.45.78.9 – 10.45.78.910.45.78.9
1110.45.78.10/3210.45.78.10 – 10.45.78.1010.45.78.10
1210.45.78.11/3210.45.78.11 – 10.45.78.1110.45.78.11
1310.45.78.12/3210.45.78.12 – 10.45.78.1210.45.78.12
1410.45.78.13/3210.45.78.13 – 10.45.78.1310.45.78.13
1510.45.78.14/3210.45.78.14 – 10.45.78.1410.45.78.14
1610.45.78.15/3210.45.78.15 – 10.45.78.1510.45.78.15
1710.45.78.16/3210.45.78.16 – 10.45.78.1610.45.78.16
1810.45.78.17/3210.45.78.17 – 10.45.78.1710.45.78.17
1910.45.78.18/3210.45.78.18 – 10.45.78.1810.45.78.18
2010.45.78.19/3210.45.78.19 – 10.45.78.1910.45.78.19
2110.45.78.20/3210.45.78.20 – 10.45.78.2010.45.78.20
2210.45.78.21/3210.45.78.21 – 10.45.78.2110.45.78.21
2310.45.78.22/3210.45.78.22 – 10.45.78.2210.45.78.22
2410.45.78.23/3210.45.78.23 – 10.45.78.2310.45.78.23
2510.45.78.24/3210.45.78.24 – 10.45.78.2410.45.78.24
2610.45.78.25/3210.45.78.25 – 10.45.78.2510.45.78.25
2710.45.78.26/3210.45.78.26 – 10.45.78.2610.45.78.26
2810.45.78.27/3210.45.78.27 – 10.45.78.2710.45.78.27
2910.45.78.28/3210.45.78.28 – 10.45.78.2810.45.78.28
3010.45.78.29/3210.45.78.29 – 10.45.78.2910.45.78.29
3110.45.78.30/3210.45.78.30 – 10.45.78.3010.45.78.30
3210.45.78.31/3210.45.78.31 – 10.45.78.3110.45.78.31
3310.45.78.32/3210.45.78.32 – 10.45.78.3210.45.78.32
3410.45.78.33/3210.45.78.33 – 10.45.78.3310.45.78.33
3510.45.78.34/3210.45.78.34 – 10.45.78.3410.45.78.34
3610.45.78.35/3210.45.78.35 – 10.45.78.3510.45.78.35
3710.45.78.36/3210.45.78.36 – 10.45.78.3610.45.78.36
3810.45.78.37/3210.45.78.37 – 10.45.78.3710.45.78.37
3910.45.78.38/3210.45.78.38 – 10.45.78.3810.45.78.38
4010.45.78.39/3210.45.78.39 – 10.45.78.3910.45.78.39
4110.45.78.40/3210.45.78.40 – 10.45.78.4010.45.78.40
4210.45.78.41/3210.45.78.41 – 10.45.78.4110.45.78.41
4310.45.78.42/3210.45.78.42 – 10.45.78.4210.45.78.42
4410.45.78.43/3210.45.78.43 – 10.45.78.4310.45.78.43
4510.45.78.44/3210.45.78.44 – 10.45.78.4410.45.78.44
4610.45.78.45/3210.45.78.45 – 10.45.78.4510.45.78.45
4710.45.78.46/3210.45.78.46 – 10.45.78.4610.45.78.46
4810.45.78.47/3210.45.78.47 – 10.45.78.4710.45.78.47
4910.45.78.48/3210.45.78.48 – 10.45.78.4810.45.78.48
5010.45.78.49/3210.45.78.49 – 10.45.78.4910.45.78.49
5110.45.78.50/3210.45.78.50 – 10.45.78.5010.45.78.50
5210.45.78.51/3210.45.78.51 – 10.45.78.5110.45.78.51
5310.45.78.52/3210.45.78.52 – 10.45.78.5210.45.78.52
5410.45.78.53/3210.45.78.53 – 10.45.78.5310.45.78.53
5510.45.78.54/3210.45.78.54 – 10.45.78.5410.45.78.54
5610.45.78.55/3210.45.78.55 – 10.45.78.5510.45.78.55
5710.45.78.56/3210.45.78.56 – 10.45.78.5610.45.78.56
5810.45.78.57/3210.45.78.57 – 10.45.78.5710.45.78.57
5910.45.78.58/3210.45.78.58 – 10.45.78.5810.45.78.58
6010.45.78.59/3210.45.78.59 – 10.45.78.5910.45.78.59
6110.45.78.60/3210.45.78.60 – 10.45.78.6010.45.78.60
6210.45.78.61/3210.45.78.61 – 10.45.78.6110.45.78.61
6310.45.78.62/3210.45.78.62 – 10.45.78.6210.45.78.62
6410.45.78.63/3210.45.78.63 – 10.45.78.6310.45.78.63
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 →