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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)10.167.209.64/26
network10.167.209.64/26
broadcast10.167.209.127
first host10.167.209.65
last host10.167.209.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.167.209.64/26
address00001010.10100111.11010001.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10100111.11010001.01000000
broadcast00001010.10100111.11010001.01111111
green = network part, grey = host part
hex0x0aa7d140
decimal178770240
reverse dns64.209.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:d140

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.209.64/3210.167.209.64 – 10.167.209.6410.167.209.64
210.167.209.65/3210.167.209.65 – 10.167.209.6510.167.209.65
310.167.209.66/3210.167.209.66 – 10.167.209.6610.167.209.66
410.167.209.67/3210.167.209.67 – 10.167.209.6710.167.209.67
510.167.209.68/3210.167.209.68 – 10.167.209.6810.167.209.68
610.167.209.69/3210.167.209.69 – 10.167.209.6910.167.209.69
710.167.209.70/3210.167.209.70 – 10.167.209.7010.167.209.70
810.167.209.71/3210.167.209.71 – 10.167.209.7110.167.209.71
910.167.209.72/3210.167.209.72 – 10.167.209.7210.167.209.72
1010.167.209.73/3210.167.209.73 – 10.167.209.7310.167.209.73
1110.167.209.74/3210.167.209.74 – 10.167.209.7410.167.209.74
1210.167.209.75/3210.167.209.75 – 10.167.209.7510.167.209.75
1310.167.209.76/3210.167.209.76 – 10.167.209.7610.167.209.76
1410.167.209.77/3210.167.209.77 – 10.167.209.7710.167.209.77
1510.167.209.78/3210.167.209.78 – 10.167.209.7810.167.209.78
1610.167.209.79/3210.167.209.79 – 10.167.209.7910.167.209.79
1710.167.209.80/3210.167.209.80 – 10.167.209.8010.167.209.80
1810.167.209.81/3210.167.209.81 – 10.167.209.8110.167.209.81
1910.167.209.82/3210.167.209.82 – 10.167.209.8210.167.209.82
2010.167.209.83/3210.167.209.83 – 10.167.209.8310.167.209.83
2110.167.209.84/3210.167.209.84 – 10.167.209.8410.167.209.84
2210.167.209.85/3210.167.209.85 – 10.167.209.8510.167.209.85
2310.167.209.86/3210.167.209.86 – 10.167.209.8610.167.209.86
2410.167.209.87/3210.167.209.87 – 10.167.209.8710.167.209.87
2510.167.209.88/3210.167.209.88 – 10.167.209.8810.167.209.88
2610.167.209.89/3210.167.209.89 – 10.167.209.8910.167.209.89
2710.167.209.90/3210.167.209.90 – 10.167.209.9010.167.209.90
2810.167.209.91/3210.167.209.91 – 10.167.209.9110.167.209.91
2910.167.209.92/3210.167.209.92 – 10.167.209.9210.167.209.92
3010.167.209.93/3210.167.209.93 – 10.167.209.9310.167.209.93
3110.167.209.94/3210.167.209.94 – 10.167.209.9410.167.209.94
3210.167.209.95/3210.167.209.95 – 10.167.209.9510.167.209.95
3310.167.209.96/3210.167.209.96 – 10.167.209.9610.167.209.96
3410.167.209.97/3210.167.209.97 – 10.167.209.9710.167.209.97
3510.167.209.98/3210.167.209.98 – 10.167.209.9810.167.209.98
3610.167.209.99/3210.167.209.99 – 10.167.209.9910.167.209.99
3710.167.209.100/3210.167.209.100 – 10.167.209.10010.167.209.100
3810.167.209.101/3210.167.209.101 – 10.167.209.10110.167.209.101
3910.167.209.102/3210.167.209.102 – 10.167.209.10210.167.209.102
4010.167.209.103/3210.167.209.103 – 10.167.209.10310.167.209.103
4110.167.209.104/3210.167.209.104 – 10.167.209.10410.167.209.104
4210.167.209.105/3210.167.209.105 – 10.167.209.10510.167.209.105
4310.167.209.106/3210.167.209.106 – 10.167.209.10610.167.209.106
4410.167.209.107/3210.167.209.107 – 10.167.209.10710.167.209.107
4510.167.209.108/3210.167.209.108 – 10.167.209.10810.167.209.108
4610.167.209.109/3210.167.209.109 – 10.167.209.10910.167.209.109
4710.167.209.110/3210.167.209.110 – 10.167.209.11010.167.209.110
4810.167.209.111/3210.167.209.111 – 10.167.209.11110.167.209.111
4910.167.209.112/3210.167.209.112 – 10.167.209.11210.167.209.112
5010.167.209.113/3210.167.209.113 – 10.167.209.11310.167.209.113
5110.167.209.114/3210.167.209.114 – 10.167.209.11410.167.209.114
5210.167.209.115/3210.167.209.115 – 10.167.209.11510.167.209.115
5310.167.209.116/3210.167.209.116 – 10.167.209.11610.167.209.116
5410.167.209.117/3210.167.209.117 – 10.167.209.11710.167.209.117
5510.167.209.118/3210.167.209.118 – 10.167.209.11810.167.209.118
5610.167.209.119/3210.167.209.119 – 10.167.209.11910.167.209.119
5710.167.209.120/3210.167.209.120 – 10.167.209.12010.167.209.120
5810.167.209.121/3210.167.209.121 – 10.167.209.12110.167.209.121
5910.167.209.122/3210.167.209.122 – 10.167.209.12210.167.209.122
6010.167.209.123/3210.167.209.123 – 10.167.209.12310.167.209.123
6110.167.209.124/3210.167.209.124 – 10.167.209.12410.167.209.124
6210.167.209.125/3210.167.209.125 – 10.167.209.12510.167.209.125
6310.167.209.126/3210.167.209.126 – 10.167.209.12610.167.209.126
6410.167.209.127/3210.167.209.127 – 10.167.209.12710.167.209.127
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 →