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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)10.3.244.0/26
network10.3.244.0/26
broadcast10.3.244.63
first host10.3.244.1
last host10.3.244.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.244.0/26
address00001010.00000011.11110100.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.11110100.00000000
broadcast00001010.00000011.11110100.00111111
green = network part, grey = host part
hex0x0a03f400
decimal168031232
reverse dns0.244.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:f400

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.244.0/3210.3.244.0 – 10.3.244.010.3.244.0
210.3.244.1/3210.3.244.1 – 10.3.244.110.3.244.1
310.3.244.2/3210.3.244.2 – 10.3.244.210.3.244.2
410.3.244.3/3210.3.244.3 – 10.3.244.310.3.244.3
510.3.244.4/3210.3.244.4 – 10.3.244.410.3.244.4
610.3.244.5/3210.3.244.5 – 10.3.244.510.3.244.5
710.3.244.6/3210.3.244.6 – 10.3.244.610.3.244.6
810.3.244.7/3210.3.244.7 – 10.3.244.710.3.244.7
910.3.244.8/3210.3.244.8 – 10.3.244.810.3.244.8
1010.3.244.9/3210.3.244.9 – 10.3.244.910.3.244.9
1110.3.244.10/3210.3.244.10 – 10.3.244.1010.3.244.10
1210.3.244.11/3210.3.244.11 – 10.3.244.1110.3.244.11
1310.3.244.12/3210.3.244.12 – 10.3.244.1210.3.244.12
1410.3.244.13/3210.3.244.13 – 10.3.244.1310.3.244.13
1510.3.244.14/3210.3.244.14 – 10.3.244.1410.3.244.14
1610.3.244.15/3210.3.244.15 – 10.3.244.1510.3.244.15
1710.3.244.16/3210.3.244.16 – 10.3.244.1610.3.244.16
1810.3.244.17/3210.3.244.17 – 10.3.244.1710.3.244.17
1910.3.244.18/3210.3.244.18 – 10.3.244.1810.3.244.18
2010.3.244.19/3210.3.244.19 – 10.3.244.1910.3.244.19
2110.3.244.20/3210.3.244.20 – 10.3.244.2010.3.244.20
2210.3.244.21/3210.3.244.21 – 10.3.244.2110.3.244.21
2310.3.244.22/3210.3.244.22 – 10.3.244.2210.3.244.22
2410.3.244.23/3210.3.244.23 – 10.3.244.2310.3.244.23
2510.3.244.24/3210.3.244.24 – 10.3.244.2410.3.244.24
2610.3.244.25/3210.3.244.25 – 10.3.244.2510.3.244.25
2710.3.244.26/3210.3.244.26 – 10.3.244.2610.3.244.26
2810.3.244.27/3210.3.244.27 – 10.3.244.2710.3.244.27
2910.3.244.28/3210.3.244.28 – 10.3.244.2810.3.244.28
3010.3.244.29/3210.3.244.29 – 10.3.244.2910.3.244.29
3110.3.244.30/3210.3.244.30 – 10.3.244.3010.3.244.30
3210.3.244.31/3210.3.244.31 – 10.3.244.3110.3.244.31
3310.3.244.32/3210.3.244.32 – 10.3.244.3210.3.244.32
3410.3.244.33/3210.3.244.33 – 10.3.244.3310.3.244.33
3510.3.244.34/3210.3.244.34 – 10.3.244.3410.3.244.34
3610.3.244.35/3210.3.244.35 – 10.3.244.3510.3.244.35
3710.3.244.36/3210.3.244.36 – 10.3.244.3610.3.244.36
3810.3.244.37/3210.3.244.37 – 10.3.244.3710.3.244.37
3910.3.244.38/3210.3.244.38 – 10.3.244.3810.3.244.38
4010.3.244.39/3210.3.244.39 – 10.3.244.3910.3.244.39
4110.3.244.40/3210.3.244.40 – 10.3.244.4010.3.244.40
4210.3.244.41/3210.3.244.41 – 10.3.244.4110.3.244.41
4310.3.244.42/3210.3.244.42 – 10.3.244.4210.3.244.42
4410.3.244.43/3210.3.244.43 – 10.3.244.4310.3.244.43
4510.3.244.44/3210.3.244.44 – 10.3.244.4410.3.244.44
4610.3.244.45/3210.3.244.45 – 10.3.244.4510.3.244.45
4710.3.244.46/3210.3.244.46 – 10.3.244.4610.3.244.46
4810.3.244.47/3210.3.244.47 – 10.3.244.4710.3.244.47
4910.3.244.48/3210.3.244.48 – 10.3.244.4810.3.244.48
5010.3.244.49/3210.3.244.49 – 10.3.244.4910.3.244.49
5110.3.244.50/3210.3.244.50 – 10.3.244.5010.3.244.50
5210.3.244.51/3210.3.244.51 – 10.3.244.5110.3.244.51
5310.3.244.52/3210.3.244.52 – 10.3.244.5210.3.244.52
5410.3.244.53/3210.3.244.53 – 10.3.244.5310.3.244.53
5510.3.244.54/3210.3.244.54 – 10.3.244.5410.3.244.54
5610.3.244.55/3210.3.244.55 – 10.3.244.5510.3.244.55
5710.3.244.56/3210.3.244.56 – 10.3.244.5610.3.244.56
5810.3.244.57/3210.3.244.57 – 10.3.244.5710.3.244.57
5910.3.244.58/3210.3.244.58 – 10.3.244.5810.3.244.58
6010.3.244.59/3210.3.244.59 – 10.3.244.5910.3.244.59
6110.3.244.60/3210.3.244.60 – 10.3.244.6010.3.244.60
6210.3.244.61/3210.3.244.61 – 10.3.244.6110.3.244.61
6310.3.244.62/3210.3.244.62 – 10.3.244.6210.3.244.62
6410.3.244.63/3210.3.244.63 – 10.3.244.6310.3.244.63
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 →