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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)10.2.83.64/26
network10.2.83.64/26
broadcast10.2.83.127
first host10.2.83.65
last host10.2.83.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.83.64/26
address00001010.00000010.01010011.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.01010011.01000000
broadcast00001010.00000010.01010011.01111111
green = network part, grey = host part
hex0x0a025340
decimal167924544
reverse dns64.83.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:5340

/26 split into /31 · 32 subnets

close ×
#networkhost rangebroadcast
110.2.83.64/3110.2.83.64 – 10.2.83.6510.2.83.65
210.2.83.66/3110.2.83.66 – 10.2.83.6710.2.83.67
310.2.83.68/3110.2.83.68 – 10.2.83.6910.2.83.69
410.2.83.70/3110.2.83.70 – 10.2.83.7110.2.83.71
510.2.83.72/3110.2.83.72 – 10.2.83.7310.2.83.73
610.2.83.74/3110.2.83.74 – 10.2.83.7510.2.83.75
710.2.83.76/3110.2.83.76 – 10.2.83.7710.2.83.77
810.2.83.78/3110.2.83.78 – 10.2.83.7910.2.83.79
910.2.83.80/3110.2.83.80 – 10.2.83.8110.2.83.81
1010.2.83.82/3110.2.83.82 – 10.2.83.8310.2.83.83
1110.2.83.84/3110.2.83.84 – 10.2.83.8510.2.83.85
1210.2.83.86/3110.2.83.86 – 10.2.83.8710.2.83.87
1310.2.83.88/3110.2.83.88 – 10.2.83.8910.2.83.89
1410.2.83.90/3110.2.83.90 – 10.2.83.9110.2.83.91
1510.2.83.92/3110.2.83.92 – 10.2.83.9310.2.83.93
1610.2.83.94/3110.2.83.94 – 10.2.83.9510.2.83.95
1710.2.83.96/3110.2.83.96 – 10.2.83.9710.2.83.97
1810.2.83.98/3110.2.83.98 – 10.2.83.9910.2.83.99
1910.2.83.100/3110.2.83.100 – 10.2.83.10110.2.83.101
2010.2.83.102/3110.2.83.102 – 10.2.83.10310.2.83.103
2110.2.83.104/3110.2.83.104 – 10.2.83.10510.2.83.105
2210.2.83.106/3110.2.83.106 – 10.2.83.10710.2.83.107
2310.2.83.108/3110.2.83.108 – 10.2.83.10910.2.83.109
2410.2.83.110/3110.2.83.110 – 10.2.83.11110.2.83.111
2510.2.83.112/3110.2.83.112 – 10.2.83.11310.2.83.113
2610.2.83.114/3110.2.83.114 – 10.2.83.11510.2.83.115
2710.2.83.116/3110.2.83.116 – 10.2.83.11710.2.83.117
2810.2.83.118/3110.2.83.118 – 10.2.83.11910.2.83.119
2910.2.83.120/3110.2.83.120 – 10.2.83.12110.2.83.121
3010.2.83.122/3110.2.83.122 – 10.2.83.12310.2.83.123
3110.2.83.124/3110.2.83.124 – 10.2.83.12510.2.83.125
3210.2.83.126/3110.2.83.126 – 10.2.83.12710.2.83.127
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 →