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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)10.78.47.64/26
network10.78.47.64/26
broadcast10.78.47.127
first host10.78.47.65
last host10.78.47.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.47.64/26
address00001010.01001110.00101111.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.00101111.01000000
broadcast00001010.01001110.00101111.01111111
green = network part, grey = host part
hex0x0a4e2f40
decimal172896064
reverse dns64.47.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:2f40

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.47.64/3210.78.47.64 – 10.78.47.6410.78.47.64
210.78.47.65/3210.78.47.65 – 10.78.47.6510.78.47.65
310.78.47.66/3210.78.47.66 – 10.78.47.6610.78.47.66
410.78.47.67/3210.78.47.67 – 10.78.47.6710.78.47.67
510.78.47.68/3210.78.47.68 – 10.78.47.6810.78.47.68
610.78.47.69/3210.78.47.69 – 10.78.47.6910.78.47.69
710.78.47.70/3210.78.47.70 – 10.78.47.7010.78.47.70
810.78.47.71/3210.78.47.71 – 10.78.47.7110.78.47.71
910.78.47.72/3210.78.47.72 – 10.78.47.7210.78.47.72
1010.78.47.73/3210.78.47.73 – 10.78.47.7310.78.47.73
1110.78.47.74/3210.78.47.74 – 10.78.47.7410.78.47.74
1210.78.47.75/3210.78.47.75 – 10.78.47.7510.78.47.75
1310.78.47.76/3210.78.47.76 – 10.78.47.7610.78.47.76
1410.78.47.77/3210.78.47.77 – 10.78.47.7710.78.47.77
1510.78.47.78/3210.78.47.78 – 10.78.47.7810.78.47.78
1610.78.47.79/3210.78.47.79 – 10.78.47.7910.78.47.79
1710.78.47.80/3210.78.47.80 – 10.78.47.8010.78.47.80
1810.78.47.81/3210.78.47.81 – 10.78.47.8110.78.47.81
1910.78.47.82/3210.78.47.82 – 10.78.47.8210.78.47.82
2010.78.47.83/3210.78.47.83 – 10.78.47.8310.78.47.83
2110.78.47.84/3210.78.47.84 – 10.78.47.8410.78.47.84
2210.78.47.85/3210.78.47.85 – 10.78.47.8510.78.47.85
2310.78.47.86/3210.78.47.86 – 10.78.47.8610.78.47.86
2410.78.47.87/3210.78.47.87 – 10.78.47.8710.78.47.87
2510.78.47.88/3210.78.47.88 – 10.78.47.8810.78.47.88
2610.78.47.89/3210.78.47.89 – 10.78.47.8910.78.47.89
2710.78.47.90/3210.78.47.90 – 10.78.47.9010.78.47.90
2810.78.47.91/3210.78.47.91 – 10.78.47.9110.78.47.91
2910.78.47.92/3210.78.47.92 – 10.78.47.9210.78.47.92
3010.78.47.93/3210.78.47.93 – 10.78.47.9310.78.47.93
3110.78.47.94/3210.78.47.94 – 10.78.47.9410.78.47.94
3210.78.47.95/3210.78.47.95 – 10.78.47.9510.78.47.95
3310.78.47.96/3210.78.47.96 – 10.78.47.9610.78.47.96
3410.78.47.97/3210.78.47.97 – 10.78.47.9710.78.47.97
3510.78.47.98/3210.78.47.98 – 10.78.47.9810.78.47.98
3610.78.47.99/3210.78.47.99 – 10.78.47.9910.78.47.99
3710.78.47.100/3210.78.47.100 – 10.78.47.10010.78.47.100
3810.78.47.101/3210.78.47.101 – 10.78.47.10110.78.47.101
3910.78.47.102/3210.78.47.102 – 10.78.47.10210.78.47.102
4010.78.47.103/3210.78.47.103 – 10.78.47.10310.78.47.103
4110.78.47.104/3210.78.47.104 – 10.78.47.10410.78.47.104
4210.78.47.105/3210.78.47.105 – 10.78.47.10510.78.47.105
4310.78.47.106/3210.78.47.106 – 10.78.47.10610.78.47.106
4410.78.47.107/3210.78.47.107 – 10.78.47.10710.78.47.107
4510.78.47.108/3210.78.47.108 – 10.78.47.10810.78.47.108
4610.78.47.109/3210.78.47.109 – 10.78.47.10910.78.47.109
4710.78.47.110/3210.78.47.110 – 10.78.47.11010.78.47.110
4810.78.47.111/3210.78.47.111 – 10.78.47.11110.78.47.111
4910.78.47.112/3210.78.47.112 – 10.78.47.11210.78.47.112
5010.78.47.113/3210.78.47.113 – 10.78.47.11310.78.47.113
5110.78.47.114/3210.78.47.114 – 10.78.47.11410.78.47.114
5210.78.47.115/3210.78.47.115 – 10.78.47.11510.78.47.115
5310.78.47.116/3210.78.47.116 – 10.78.47.11610.78.47.116
5410.78.47.117/3210.78.47.117 – 10.78.47.11710.78.47.117
5510.78.47.118/3210.78.47.118 – 10.78.47.11810.78.47.118
5610.78.47.119/3210.78.47.119 – 10.78.47.11910.78.47.119
5710.78.47.120/3210.78.47.120 – 10.78.47.12010.78.47.120
5810.78.47.121/3210.78.47.121 – 10.78.47.12110.78.47.121
5910.78.47.122/3210.78.47.122 – 10.78.47.12210.78.47.122
6010.78.47.123/3210.78.47.123 – 10.78.47.12310.78.47.123
6110.78.47.124/3210.78.47.124 – 10.78.47.12410.78.47.124
6210.78.47.125/3210.78.47.125 – 10.78.47.12510.78.47.125
6310.78.47.126/3210.78.47.126 – 10.78.47.12610.78.47.126
6410.78.47.127/3210.78.47.127 – 10.78.47.12710.78.47.127
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 →