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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)10.4.78.64/26
network10.4.78.64/26
broadcast10.4.78.127
first host10.4.78.65
last host10.4.78.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.4.78.64/26
address00001010.00000100.01001110.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000100.01001110.01000000
broadcast00001010.00000100.01001110.01111111
green = network part, grey = host part
hex0x0a044e40
decimal168054336
reverse dns64.78.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:4e40

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.4.78.64/3210.4.78.64 – 10.4.78.6410.4.78.64
210.4.78.65/3210.4.78.65 – 10.4.78.6510.4.78.65
310.4.78.66/3210.4.78.66 – 10.4.78.6610.4.78.66
410.4.78.67/3210.4.78.67 – 10.4.78.6710.4.78.67
510.4.78.68/3210.4.78.68 – 10.4.78.6810.4.78.68
610.4.78.69/3210.4.78.69 – 10.4.78.6910.4.78.69
710.4.78.70/3210.4.78.70 – 10.4.78.7010.4.78.70
810.4.78.71/3210.4.78.71 – 10.4.78.7110.4.78.71
910.4.78.72/3210.4.78.72 – 10.4.78.7210.4.78.72
1010.4.78.73/3210.4.78.73 – 10.4.78.7310.4.78.73
1110.4.78.74/3210.4.78.74 – 10.4.78.7410.4.78.74
1210.4.78.75/3210.4.78.75 – 10.4.78.7510.4.78.75
1310.4.78.76/3210.4.78.76 – 10.4.78.7610.4.78.76
1410.4.78.77/3210.4.78.77 – 10.4.78.7710.4.78.77
1510.4.78.78/3210.4.78.78 – 10.4.78.7810.4.78.78
1610.4.78.79/3210.4.78.79 – 10.4.78.7910.4.78.79
1710.4.78.80/3210.4.78.80 – 10.4.78.8010.4.78.80
1810.4.78.81/3210.4.78.81 – 10.4.78.8110.4.78.81
1910.4.78.82/3210.4.78.82 – 10.4.78.8210.4.78.82
2010.4.78.83/3210.4.78.83 – 10.4.78.8310.4.78.83
2110.4.78.84/3210.4.78.84 – 10.4.78.8410.4.78.84
2210.4.78.85/3210.4.78.85 – 10.4.78.8510.4.78.85
2310.4.78.86/3210.4.78.86 – 10.4.78.8610.4.78.86
2410.4.78.87/3210.4.78.87 – 10.4.78.8710.4.78.87
2510.4.78.88/3210.4.78.88 – 10.4.78.8810.4.78.88
2610.4.78.89/3210.4.78.89 – 10.4.78.8910.4.78.89
2710.4.78.90/3210.4.78.90 – 10.4.78.9010.4.78.90
2810.4.78.91/3210.4.78.91 – 10.4.78.9110.4.78.91
2910.4.78.92/3210.4.78.92 – 10.4.78.9210.4.78.92
3010.4.78.93/3210.4.78.93 – 10.4.78.9310.4.78.93
3110.4.78.94/3210.4.78.94 – 10.4.78.9410.4.78.94
3210.4.78.95/3210.4.78.95 – 10.4.78.9510.4.78.95
3310.4.78.96/3210.4.78.96 – 10.4.78.9610.4.78.96
3410.4.78.97/3210.4.78.97 – 10.4.78.9710.4.78.97
3510.4.78.98/3210.4.78.98 – 10.4.78.9810.4.78.98
3610.4.78.99/3210.4.78.99 – 10.4.78.9910.4.78.99
3710.4.78.100/3210.4.78.100 – 10.4.78.10010.4.78.100
3810.4.78.101/3210.4.78.101 – 10.4.78.10110.4.78.101
3910.4.78.102/3210.4.78.102 – 10.4.78.10210.4.78.102
4010.4.78.103/3210.4.78.103 – 10.4.78.10310.4.78.103
4110.4.78.104/3210.4.78.104 – 10.4.78.10410.4.78.104
4210.4.78.105/3210.4.78.105 – 10.4.78.10510.4.78.105
4310.4.78.106/3210.4.78.106 – 10.4.78.10610.4.78.106
4410.4.78.107/3210.4.78.107 – 10.4.78.10710.4.78.107
4510.4.78.108/3210.4.78.108 – 10.4.78.10810.4.78.108
4610.4.78.109/3210.4.78.109 – 10.4.78.10910.4.78.109
4710.4.78.110/3210.4.78.110 – 10.4.78.11010.4.78.110
4810.4.78.111/3210.4.78.111 – 10.4.78.11110.4.78.111
4910.4.78.112/3210.4.78.112 – 10.4.78.11210.4.78.112
5010.4.78.113/3210.4.78.113 – 10.4.78.11310.4.78.113
5110.4.78.114/3210.4.78.114 – 10.4.78.11410.4.78.114
5210.4.78.115/3210.4.78.115 – 10.4.78.11510.4.78.115
5310.4.78.116/3210.4.78.116 – 10.4.78.11610.4.78.116
5410.4.78.117/3210.4.78.117 – 10.4.78.11710.4.78.117
5510.4.78.118/3210.4.78.118 – 10.4.78.11810.4.78.118
5610.4.78.119/3210.4.78.119 – 10.4.78.11910.4.78.119
5710.4.78.120/3210.4.78.120 – 10.4.78.12010.4.78.120
5810.4.78.121/3210.4.78.121 – 10.4.78.12110.4.78.121
5910.4.78.122/3210.4.78.122 – 10.4.78.12210.4.78.122
6010.4.78.123/3210.4.78.123 – 10.4.78.12310.4.78.123
6110.4.78.124/3210.4.78.124 – 10.4.78.12410.4.78.124
6210.4.78.125/3210.4.78.125 – 10.4.78.12510.4.78.125
6310.4.78.126/3210.4.78.126 – 10.4.78.12610.4.78.126
6410.4.78.127/3210.4.78.127 – 10.4.78.12710.4.78.127
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 →