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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)10.167.173.64/26
network10.167.173.64/26
broadcast10.167.173.127
first host10.167.173.65
last host10.167.173.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.167.173.64/26
address00001010.10100111.10101101.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10100111.10101101.01000000
broadcast00001010.10100111.10101101.01111111
green = network part, grey = host part
hex0x0aa7ad40
decimal178761024
reverse dns64.173.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:ad40

/26 split into /31 · 32 subnets

close ×
#networkhost rangebroadcast
110.167.173.64/3110.167.173.64 – 10.167.173.6510.167.173.65
210.167.173.66/3110.167.173.66 – 10.167.173.6710.167.173.67
310.167.173.68/3110.167.173.68 – 10.167.173.6910.167.173.69
410.167.173.70/3110.167.173.70 – 10.167.173.7110.167.173.71
510.167.173.72/3110.167.173.72 – 10.167.173.7310.167.173.73
610.167.173.74/3110.167.173.74 – 10.167.173.7510.167.173.75
710.167.173.76/3110.167.173.76 – 10.167.173.7710.167.173.77
810.167.173.78/3110.167.173.78 – 10.167.173.7910.167.173.79
910.167.173.80/3110.167.173.80 – 10.167.173.8110.167.173.81
1010.167.173.82/3110.167.173.82 – 10.167.173.8310.167.173.83
1110.167.173.84/3110.167.173.84 – 10.167.173.8510.167.173.85
1210.167.173.86/3110.167.173.86 – 10.167.173.8710.167.173.87
1310.167.173.88/3110.167.173.88 – 10.167.173.8910.167.173.89
1410.167.173.90/3110.167.173.90 – 10.167.173.9110.167.173.91
1510.167.173.92/3110.167.173.92 – 10.167.173.9310.167.173.93
1610.167.173.94/3110.167.173.94 – 10.167.173.9510.167.173.95
1710.167.173.96/3110.167.173.96 – 10.167.173.9710.167.173.97
1810.167.173.98/3110.167.173.98 – 10.167.173.9910.167.173.99
1910.167.173.100/3110.167.173.100 – 10.167.173.10110.167.173.101
2010.167.173.102/3110.167.173.102 – 10.167.173.10310.167.173.103
2110.167.173.104/3110.167.173.104 – 10.167.173.10510.167.173.105
2210.167.173.106/3110.167.173.106 – 10.167.173.10710.167.173.107
2310.167.173.108/3110.167.173.108 – 10.167.173.10910.167.173.109
2410.167.173.110/3110.167.173.110 – 10.167.173.11110.167.173.111
2510.167.173.112/3110.167.173.112 – 10.167.173.11310.167.173.113
2610.167.173.114/3110.167.173.114 – 10.167.173.11510.167.173.115
2710.167.173.116/3110.167.173.116 – 10.167.173.11710.167.173.117
2810.167.173.118/3110.167.173.118 – 10.167.173.11910.167.173.119
2910.167.173.120/3110.167.173.120 – 10.167.173.12110.167.173.121
3010.167.173.122/3110.167.173.122 – 10.167.173.12310.167.173.123
3110.167.173.124/3110.167.173.124 – 10.167.173.12510.167.173.125
3210.167.173.126/3110.167.173.126 – 10.167.173.12710.167.173.127
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 →