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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)10.167.66.64/26
network10.167.66.64/26
broadcast10.167.66.127
first host10.167.66.65
last host10.167.66.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.167.66.64/26
address00001010.10100111.01000010.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10100111.01000010.01000000
broadcast00001010.10100111.01000010.01111111
green = network part, grey = host part
hex0x0aa74240
decimal178733632
reverse dns64.66.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:4240

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.66.64/3210.167.66.64 – 10.167.66.6410.167.66.64
210.167.66.65/3210.167.66.65 – 10.167.66.6510.167.66.65
310.167.66.66/3210.167.66.66 – 10.167.66.6610.167.66.66
410.167.66.67/3210.167.66.67 – 10.167.66.6710.167.66.67
510.167.66.68/3210.167.66.68 – 10.167.66.6810.167.66.68
610.167.66.69/3210.167.66.69 – 10.167.66.6910.167.66.69
710.167.66.70/3210.167.66.70 – 10.167.66.7010.167.66.70
810.167.66.71/3210.167.66.71 – 10.167.66.7110.167.66.71
910.167.66.72/3210.167.66.72 – 10.167.66.7210.167.66.72
1010.167.66.73/3210.167.66.73 – 10.167.66.7310.167.66.73
1110.167.66.74/3210.167.66.74 – 10.167.66.7410.167.66.74
1210.167.66.75/3210.167.66.75 – 10.167.66.7510.167.66.75
1310.167.66.76/3210.167.66.76 – 10.167.66.7610.167.66.76
1410.167.66.77/3210.167.66.77 – 10.167.66.7710.167.66.77
1510.167.66.78/3210.167.66.78 – 10.167.66.7810.167.66.78
1610.167.66.79/3210.167.66.79 – 10.167.66.7910.167.66.79
1710.167.66.80/3210.167.66.80 – 10.167.66.8010.167.66.80
1810.167.66.81/3210.167.66.81 – 10.167.66.8110.167.66.81
1910.167.66.82/3210.167.66.82 – 10.167.66.8210.167.66.82
2010.167.66.83/3210.167.66.83 – 10.167.66.8310.167.66.83
2110.167.66.84/3210.167.66.84 – 10.167.66.8410.167.66.84
2210.167.66.85/3210.167.66.85 – 10.167.66.8510.167.66.85
2310.167.66.86/3210.167.66.86 – 10.167.66.8610.167.66.86
2410.167.66.87/3210.167.66.87 – 10.167.66.8710.167.66.87
2510.167.66.88/3210.167.66.88 – 10.167.66.8810.167.66.88
2610.167.66.89/3210.167.66.89 – 10.167.66.8910.167.66.89
2710.167.66.90/3210.167.66.90 – 10.167.66.9010.167.66.90
2810.167.66.91/3210.167.66.91 – 10.167.66.9110.167.66.91
2910.167.66.92/3210.167.66.92 – 10.167.66.9210.167.66.92
3010.167.66.93/3210.167.66.93 – 10.167.66.9310.167.66.93
3110.167.66.94/3210.167.66.94 – 10.167.66.9410.167.66.94
3210.167.66.95/3210.167.66.95 – 10.167.66.9510.167.66.95
3310.167.66.96/3210.167.66.96 – 10.167.66.9610.167.66.96
3410.167.66.97/3210.167.66.97 – 10.167.66.9710.167.66.97
3510.167.66.98/3210.167.66.98 – 10.167.66.9810.167.66.98
3610.167.66.99/3210.167.66.99 – 10.167.66.9910.167.66.99
3710.167.66.100/3210.167.66.100 – 10.167.66.10010.167.66.100
3810.167.66.101/3210.167.66.101 – 10.167.66.10110.167.66.101
3910.167.66.102/3210.167.66.102 – 10.167.66.10210.167.66.102
4010.167.66.103/3210.167.66.103 – 10.167.66.10310.167.66.103
4110.167.66.104/3210.167.66.104 – 10.167.66.10410.167.66.104
4210.167.66.105/3210.167.66.105 – 10.167.66.10510.167.66.105
4310.167.66.106/3210.167.66.106 – 10.167.66.10610.167.66.106
4410.167.66.107/3210.167.66.107 – 10.167.66.10710.167.66.107
4510.167.66.108/3210.167.66.108 – 10.167.66.10810.167.66.108
4610.167.66.109/3210.167.66.109 – 10.167.66.10910.167.66.109
4710.167.66.110/3210.167.66.110 – 10.167.66.11010.167.66.110
4810.167.66.111/3210.167.66.111 – 10.167.66.11110.167.66.111
4910.167.66.112/3210.167.66.112 – 10.167.66.11210.167.66.112
5010.167.66.113/3210.167.66.113 – 10.167.66.11310.167.66.113
5110.167.66.114/3210.167.66.114 – 10.167.66.11410.167.66.114
5210.167.66.115/3210.167.66.115 – 10.167.66.11510.167.66.115
5310.167.66.116/3210.167.66.116 – 10.167.66.11610.167.66.116
5410.167.66.117/3210.167.66.117 – 10.167.66.11710.167.66.117
5510.167.66.118/3210.167.66.118 – 10.167.66.11810.167.66.118
5610.167.66.119/3210.167.66.119 – 10.167.66.11910.167.66.119
5710.167.66.120/3210.167.66.120 – 10.167.66.12010.167.66.120
5810.167.66.121/3210.167.66.121 – 10.167.66.12110.167.66.121
5910.167.66.122/3210.167.66.122 – 10.167.66.12210.167.66.122
6010.167.66.123/3210.167.66.123 – 10.167.66.12310.167.66.123
6110.167.66.124/3210.167.66.124 – 10.167.66.12410.167.66.124
6210.167.66.125/3210.167.66.125 – 10.167.66.12510.167.66.125
6310.167.66.126/3210.167.66.126 – 10.167.66.12610.167.66.126
6410.167.66.127/3210.167.66.127 – 10.167.66.12710.167.66.127
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 →