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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)10.136.2.64/26
network10.136.2.64/26
broadcast10.136.2.127
first host10.136.2.65
last host10.136.2.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.136.2.64/26
address00001010.10001000.00000010.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10001000.00000010.01000000
broadcast00001010.10001000.00000010.01111111
green = network part, grey = host part
hex0x0a880240
decimal176685632
reverse dns64.2.136.10.in-addr.arpa
ipv4-mapped::ffff:a88:240

/26 split into /31 · 32 subnets

close ×
#networkhost rangebroadcast
110.136.2.64/3110.136.2.64 – 10.136.2.6510.136.2.65
210.136.2.66/3110.136.2.66 – 10.136.2.6710.136.2.67
310.136.2.68/3110.136.2.68 – 10.136.2.6910.136.2.69
410.136.2.70/3110.136.2.70 – 10.136.2.7110.136.2.71
510.136.2.72/3110.136.2.72 – 10.136.2.7310.136.2.73
610.136.2.74/3110.136.2.74 – 10.136.2.7510.136.2.75
710.136.2.76/3110.136.2.76 – 10.136.2.7710.136.2.77
810.136.2.78/3110.136.2.78 – 10.136.2.7910.136.2.79
910.136.2.80/3110.136.2.80 – 10.136.2.8110.136.2.81
1010.136.2.82/3110.136.2.82 – 10.136.2.8310.136.2.83
1110.136.2.84/3110.136.2.84 – 10.136.2.8510.136.2.85
1210.136.2.86/3110.136.2.86 – 10.136.2.8710.136.2.87
1310.136.2.88/3110.136.2.88 – 10.136.2.8910.136.2.89
1410.136.2.90/3110.136.2.90 – 10.136.2.9110.136.2.91
1510.136.2.92/3110.136.2.92 – 10.136.2.9310.136.2.93
1610.136.2.94/3110.136.2.94 – 10.136.2.9510.136.2.95
1710.136.2.96/3110.136.2.96 – 10.136.2.9710.136.2.97
1810.136.2.98/3110.136.2.98 – 10.136.2.9910.136.2.99
1910.136.2.100/3110.136.2.100 – 10.136.2.10110.136.2.101
2010.136.2.102/3110.136.2.102 – 10.136.2.10310.136.2.103
2110.136.2.104/3110.136.2.104 – 10.136.2.10510.136.2.105
2210.136.2.106/3110.136.2.106 – 10.136.2.10710.136.2.107
2310.136.2.108/3110.136.2.108 – 10.136.2.10910.136.2.109
2410.136.2.110/3110.136.2.110 – 10.136.2.11110.136.2.111
2510.136.2.112/3110.136.2.112 – 10.136.2.11310.136.2.113
2610.136.2.114/3110.136.2.114 – 10.136.2.11510.136.2.115
2710.136.2.116/3110.136.2.116 – 10.136.2.11710.136.2.117
2810.136.2.118/3110.136.2.118 – 10.136.2.11910.136.2.119
2910.136.2.120/3110.136.2.120 – 10.136.2.12110.136.2.121
3010.136.2.122/3110.136.2.122 – 10.136.2.12310.136.2.123
3110.136.2.124/3110.136.2.124 – 10.136.2.12510.136.2.125
3210.136.2.126/3110.136.2.126 – 10.136.2.12710.136.2.127
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 →