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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)10.78.4.64/26
network10.78.4.64/26
broadcast10.78.4.127
first host10.78.4.65
last host10.78.4.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.4.64/26
address00001010.01001110.00000100.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.00000100.01000000
broadcast00001010.01001110.00000100.01111111
green = network part, grey = host part
hex0x0a4e0440
decimal172885056
reverse dns64.4.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:440

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.4.64/3210.78.4.64 – 10.78.4.6410.78.4.64
210.78.4.65/3210.78.4.65 – 10.78.4.6510.78.4.65
310.78.4.66/3210.78.4.66 – 10.78.4.6610.78.4.66
410.78.4.67/3210.78.4.67 – 10.78.4.6710.78.4.67
510.78.4.68/3210.78.4.68 – 10.78.4.6810.78.4.68
610.78.4.69/3210.78.4.69 – 10.78.4.6910.78.4.69
710.78.4.70/3210.78.4.70 – 10.78.4.7010.78.4.70
810.78.4.71/3210.78.4.71 – 10.78.4.7110.78.4.71
910.78.4.72/3210.78.4.72 – 10.78.4.7210.78.4.72
1010.78.4.73/3210.78.4.73 – 10.78.4.7310.78.4.73
1110.78.4.74/3210.78.4.74 – 10.78.4.7410.78.4.74
1210.78.4.75/3210.78.4.75 – 10.78.4.7510.78.4.75
1310.78.4.76/3210.78.4.76 – 10.78.4.7610.78.4.76
1410.78.4.77/3210.78.4.77 – 10.78.4.7710.78.4.77
1510.78.4.78/3210.78.4.78 – 10.78.4.7810.78.4.78
1610.78.4.79/3210.78.4.79 – 10.78.4.7910.78.4.79
1710.78.4.80/3210.78.4.80 – 10.78.4.8010.78.4.80
1810.78.4.81/3210.78.4.81 – 10.78.4.8110.78.4.81
1910.78.4.82/3210.78.4.82 – 10.78.4.8210.78.4.82
2010.78.4.83/3210.78.4.83 – 10.78.4.8310.78.4.83
2110.78.4.84/3210.78.4.84 – 10.78.4.8410.78.4.84
2210.78.4.85/3210.78.4.85 – 10.78.4.8510.78.4.85
2310.78.4.86/3210.78.4.86 – 10.78.4.8610.78.4.86
2410.78.4.87/3210.78.4.87 – 10.78.4.8710.78.4.87
2510.78.4.88/3210.78.4.88 – 10.78.4.8810.78.4.88
2610.78.4.89/3210.78.4.89 – 10.78.4.8910.78.4.89
2710.78.4.90/3210.78.4.90 – 10.78.4.9010.78.4.90
2810.78.4.91/3210.78.4.91 – 10.78.4.9110.78.4.91
2910.78.4.92/3210.78.4.92 – 10.78.4.9210.78.4.92
3010.78.4.93/3210.78.4.93 – 10.78.4.9310.78.4.93
3110.78.4.94/3210.78.4.94 – 10.78.4.9410.78.4.94
3210.78.4.95/3210.78.4.95 – 10.78.4.9510.78.4.95
3310.78.4.96/3210.78.4.96 – 10.78.4.9610.78.4.96
3410.78.4.97/3210.78.4.97 – 10.78.4.9710.78.4.97
3510.78.4.98/3210.78.4.98 – 10.78.4.9810.78.4.98
3610.78.4.99/3210.78.4.99 – 10.78.4.9910.78.4.99
3710.78.4.100/3210.78.4.100 – 10.78.4.10010.78.4.100
3810.78.4.101/3210.78.4.101 – 10.78.4.10110.78.4.101
3910.78.4.102/3210.78.4.102 – 10.78.4.10210.78.4.102
4010.78.4.103/3210.78.4.103 – 10.78.4.10310.78.4.103
4110.78.4.104/3210.78.4.104 – 10.78.4.10410.78.4.104
4210.78.4.105/3210.78.4.105 – 10.78.4.10510.78.4.105
4310.78.4.106/3210.78.4.106 – 10.78.4.10610.78.4.106
4410.78.4.107/3210.78.4.107 – 10.78.4.10710.78.4.107
4510.78.4.108/3210.78.4.108 – 10.78.4.10810.78.4.108
4610.78.4.109/3210.78.4.109 – 10.78.4.10910.78.4.109
4710.78.4.110/3210.78.4.110 – 10.78.4.11010.78.4.110
4810.78.4.111/3210.78.4.111 – 10.78.4.11110.78.4.111
4910.78.4.112/3210.78.4.112 – 10.78.4.11210.78.4.112
5010.78.4.113/3210.78.4.113 – 10.78.4.11310.78.4.113
5110.78.4.114/3210.78.4.114 – 10.78.4.11410.78.4.114
5210.78.4.115/3210.78.4.115 – 10.78.4.11510.78.4.115
5310.78.4.116/3210.78.4.116 – 10.78.4.11610.78.4.116
5410.78.4.117/3210.78.4.117 – 10.78.4.11710.78.4.117
5510.78.4.118/3210.78.4.118 – 10.78.4.11810.78.4.118
5610.78.4.119/3210.78.4.119 – 10.78.4.11910.78.4.119
5710.78.4.120/3210.78.4.120 – 10.78.4.12010.78.4.120
5810.78.4.121/3210.78.4.121 – 10.78.4.12110.78.4.121
5910.78.4.122/3210.78.4.122 – 10.78.4.12210.78.4.122
6010.78.4.123/3210.78.4.123 – 10.78.4.12310.78.4.123
6110.78.4.124/3210.78.4.124 – 10.78.4.12410.78.4.124
6210.78.4.125/3210.78.4.125 – 10.78.4.12510.78.4.125
6310.78.4.126/3210.78.4.126 – 10.78.4.12610.78.4.126
6410.78.4.127/3210.78.4.127 – 10.78.4.12710.78.4.127
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 →