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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)10.76.6.64/26
network10.76.6.64/26
broadcast10.76.6.127
first host10.76.6.65
last host10.76.6.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.76.6.64/26
address00001010.01001100.00000110.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001100.00000110.01000000
broadcast00001010.01001100.00000110.01111111
green = network part, grey = host part
hex0x0a4c0640
decimal172754496
reverse dns64.6.76.10.in-addr.arpa
ipv4-mapped::ffff:a4c:640

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.76.6.64/3210.76.6.64 – 10.76.6.6410.76.6.64
210.76.6.65/3210.76.6.65 – 10.76.6.6510.76.6.65
310.76.6.66/3210.76.6.66 – 10.76.6.6610.76.6.66
410.76.6.67/3210.76.6.67 – 10.76.6.6710.76.6.67
510.76.6.68/3210.76.6.68 – 10.76.6.6810.76.6.68
610.76.6.69/3210.76.6.69 – 10.76.6.6910.76.6.69
710.76.6.70/3210.76.6.70 – 10.76.6.7010.76.6.70
810.76.6.71/3210.76.6.71 – 10.76.6.7110.76.6.71
910.76.6.72/3210.76.6.72 – 10.76.6.7210.76.6.72
1010.76.6.73/3210.76.6.73 – 10.76.6.7310.76.6.73
1110.76.6.74/3210.76.6.74 – 10.76.6.7410.76.6.74
1210.76.6.75/3210.76.6.75 – 10.76.6.7510.76.6.75
1310.76.6.76/3210.76.6.76 – 10.76.6.7610.76.6.76
1410.76.6.77/3210.76.6.77 – 10.76.6.7710.76.6.77
1510.76.6.78/3210.76.6.78 – 10.76.6.7810.76.6.78
1610.76.6.79/3210.76.6.79 – 10.76.6.7910.76.6.79
1710.76.6.80/3210.76.6.80 – 10.76.6.8010.76.6.80
1810.76.6.81/3210.76.6.81 – 10.76.6.8110.76.6.81
1910.76.6.82/3210.76.6.82 – 10.76.6.8210.76.6.82
2010.76.6.83/3210.76.6.83 – 10.76.6.8310.76.6.83
2110.76.6.84/3210.76.6.84 – 10.76.6.8410.76.6.84
2210.76.6.85/3210.76.6.85 – 10.76.6.8510.76.6.85
2310.76.6.86/3210.76.6.86 – 10.76.6.8610.76.6.86
2410.76.6.87/3210.76.6.87 – 10.76.6.8710.76.6.87
2510.76.6.88/3210.76.6.88 – 10.76.6.8810.76.6.88
2610.76.6.89/3210.76.6.89 – 10.76.6.8910.76.6.89
2710.76.6.90/3210.76.6.90 – 10.76.6.9010.76.6.90
2810.76.6.91/3210.76.6.91 – 10.76.6.9110.76.6.91
2910.76.6.92/3210.76.6.92 – 10.76.6.9210.76.6.92
3010.76.6.93/3210.76.6.93 – 10.76.6.9310.76.6.93
3110.76.6.94/3210.76.6.94 – 10.76.6.9410.76.6.94
3210.76.6.95/3210.76.6.95 – 10.76.6.9510.76.6.95
3310.76.6.96/3210.76.6.96 – 10.76.6.9610.76.6.96
3410.76.6.97/3210.76.6.97 – 10.76.6.9710.76.6.97
3510.76.6.98/3210.76.6.98 – 10.76.6.9810.76.6.98
3610.76.6.99/3210.76.6.99 – 10.76.6.9910.76.6.99
3710.76.6.100/3210.76.6.100 – 10.76.6.10010.76.6.100
3810.76.6.101/3210.76.6.101 – 10.76.6.10110.76.6.101
3910.76.6.102/3210.76.6.102 – 10.76.6.10210.76.6.102
4010.76.6.103/3210.76.6.103 – 10.76.6.10310.76.6.103
4110.76.6.104/3210.76.6.104 – 10.76.6.10410.76.6.104
4210.76.6.105/3210.76.6.105 – 10.76.6.10510.76.6.105
4310.76.6.106/3210.76.6.106 – 10.76.6.10610.76.6.106
4410.76.6.107/3210.76.6.107 – 10.76.6.10710.76.6.107
4510.76.6.108/3210.76.6.108 – 10.76.6.10810.76.6.108
4610.76.6.109/3210.76.6.109 – 10.76.6.10910.76.6.109
4710.76.6.110/3210.76.6.110 – 10.76.6.11010.76.6.110
4810.76.6.111/3210.76.6.111 – 10.76.6.11110.76.6.111
4910.76.6.112/3210.76.6.112 – 10.76.6.11210.76.6.112
5010.76.6.113/3210.76.6.113 – 10.76.6.11310.76.6.113
5110.76.6.114/3210.76.6.114 – 10.76.6.11410.76.6.114
5210.76.6.115/3210.76.6.115 – 10.76.6.11510.76.6.115
5310.76.6.116/3210.76.6.116 – 10.76.6.11610.76.6.116
5410.76.6.117/3210.76.6.117 – 10.76.6.11710.76.6.117
5510.76.6.118/3210.76.6.118 – 10.76.6.11810.76.6.118
5610.76.6.119/3210.76.6.119 – 10.76.6.11910.76.6.119
5710.76.6.120/3210.76.6.120 – 10.76.6.12010.76.6.120
5810.76.6.121/3210.76.6.121 – 10.76.6.12110.76.6.121
5910.76.6.122/3210.76.6.122 – 10.76.6.12210.76.6.122
6010.76.6.123/3210.76.6.123 – 10.76.6.12310.76.6.123
6110.76.6.124/3210.76.6.124 – 10.76.6.12410.76.6.124
6210.76.6.125/3210.76.6.125 – 10.76.6.12510.76.6.125
6310.76.6.126/3210.76.6.126 – 10.76.6.12610.76.6.126
6410.76.6.127/3210.76.6.127 – 10.76.6.12710.76.6.127
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 →