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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)10.3.80.64/26
network10.3.80.64/26
broadcast10.3.80.127
first host10.3.80.65
last host10.3.80.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.80.64/26
address00001010.00000011.01010000.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.01010000.01000000
broadcast00001010.00000011.01010000.01111111
green = network part, grey = host part
hex0x0a035040
decimal167989312
reverse dns64.80.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:5040

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.80.64/3210.3.80.64 – 10.3.80.6410.3.80.64
210.3.80.65/3210.3.80.65 – 10.3.80.6510.3.80.65
310.3.80.66/3210.3.80.66 – 10.3.80.6610.3.80.66
410.3.80.67/3210.3.80.67 – 10.3.80.6710.3.80.67
510.3.80.68/3210.3.80.68 – 10.3.80.6810.3.80.68
610.3.80.69/3210.3.80.69 – 10.3.80.6910.3.80.69
710.3.80.70/3210.3.80.70 – 10.3.80.7010.3.80.70
810.3.80.71/3210.3.80.71 – 10.3.80.7110.3.80.71
910.3.80.72/3210.3.80.72 – 10.3.80.7210.3.80.72
1010.3.80.73/3210.3.80.73 – 10.3.80.7310.3.80.73
1110.3.80.74/3210.3.80.74 – 10.3.80.7410.3.80.74
1210.3.80.75/3210.3.80.75 – 10.3.80.7510.3.80.75
1310.3.80.76/3210.3.80.76 – 10.3.80.7610.3.80.76
1410.3.80.77/3210.3.80.77 – 10.3.80.7710.3.80.77
1510.3.80.78/3210.3.80.78 – 10.3.80.7810.3.80.78
1610.3.80.79/3210.3.80.79 – 10.3.80.7910.3.80.79
1710.3.80.80/3210.3.80.80 – 10.3.80.8010.3.80.80
1810.3.80.81/3210.3.80.81 – 10.3.80.8110.3.80.81
1910.3.80.82/3210.3.80.82 – 10.3.80.8210.3.80.82
2010.3.80.83/3210.3.80.83 – 10.3.80.8310.3.80.83
2110.3.80.84/3210.3.80.84 – 10.3.80.8410.3.80.84
2210.3.80.85/3210.3.80.85 – 10.3.80.8510.3.80.85
2310.3.80.86/3210.3.80.86 – 10.3.80.8610.3.80.86
2410.3.80.87/3210.3.80.87 – 10.3.80.8710.3.80.87
2510.3.80.88/3210.3.80.88 – 10.3.80.8810.3.80.88
2610.3.80.89/3210.3.80.89 – 10.3.80.8910.3.80.89
2710.3.80.90/3210.3.80.90 – 10.3.80.9010.3.80.90
2810.3.80.91/3210.3.80.91 – 10.3.80.9110.3.80.91
2910.3.80.92/3210.3.80.92 – 10.3.80.9210.3.80.92
3010.3.80.93/3210.3.80.93 – 10.3.80.9310.3.80.93
3110.3.80.94/3210.3.80.94 – 10.3.80.9410.3.80.94
3210.3.80.95/3210.3.80.95 – 10.3.80.9510.3.80.95
3310.3.80.96/3210.3.80.96 – 10.3.80.9610.3.80.96
3410.3.80.97/3210.3.80.97 – 10.3.80.9710.3.80.97
3510.3.80.98/3210.3.80.98 – 10.3.80.9810.3.80.98
3610.3.80.99/3210.3.80.99 – 10.3.80.9910.3.80.99
3710.3.80.100/3210.3.80.100 – 10.3.80.10010.3.80.100
3810.3.80.101/3210.3.80.101 – 10.3.80.10110.3.80.101
3910.3.80.102/3210.3.80.102 – 10.3.80.10210.3.80.102
4010.3.80.103/3210.3.80.103 – 10.3.80.10310.3.80.103
4110.3.80.104/3210.3.80.104 – 10.3.80.10410.3.80.104
4210.3.80.105/3210.3.80.105 – 10.3.80.10510.3.80.105
4310.3.80.106/3210.3.80.106 – 10.3.80.10610.3.80.106
4410.3.80.107/3210.3.80.107 – 10.3.80.10710.3.80.107
4510.3.80.108/3210.3.80.108 – 10.3.80.10810.3.80.108
4610.3.80.109/3210.3.80.109 – 10.3.80.10910.3.80.109
4710.3.80.110/3210.3.80.110 – 10.3.80.11010.3.80.110
4810.3.80.111/3210.3.80.111 – 10.3.80.11110.3.80.111
4910.3.80.112/3210.3.80.112 – 10.3.80.11210.3.80.112
5010.3.80.113/3210.3.80.113 – 10.3.80.11310.3.80.113
5110.3.80.114/3210.3.80.114 – 10.3.80.11410.3.80.114
5210.3.80.115/3210.3.80.115 – 10.3.80.11510.3.80.115
5310.3.80.116/3210.3.80.116 – 10.3.80.11610.3.80.116
5410.3.80.117/3210.3.80.117 – 10.3.80.11710.3.80.117
5510.3.80.118/3210.3.80.118 – 10.3.80.11810.3.80.118
5610.3.80.119/3210.3.80.119 – 10.3.80.11910.3.80.119
5710.3.80.120/3210.3.80.120 – 10.3.80.12010.3.80.120
5810.3.80.121/3210.3.80.121 – 10.3.80.12110.3.80.121
5910.3.80.122/3210.3.80.122 – 10.3.80.12210.3.80.122
6010.3.80.123/3210.3.80.123 – 10.3.80.12310.3.80.123
6110.3.80.124/3210.3.80.124 – 10.3.80.12410.3.80.124
6210.3.80.125/3210.3.80.125 – 10.3.80.12510.3.80.125
6310.3.80.126/3210.3.80.126 – 10.3.80.12610.3.80.126
6410.3.80.127/3210.3.80.127 – 10.3.80.12710.3.80.127
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 →