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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)10.2.75.64/26
network10.2.75.64/26
broadcast10.2.75.127
first host10.2.75.65
last host10.2.75.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.75.64/26
address00001010.00000010.01001011.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.01001011.01000000
broadcast00001010.00000010.01001011.01111111
green = network part, grey = host part
hex0x0a024b40
decimal167922496
reverse dns64.75.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:4b40

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.75.64/3210.2.75.64 – 10.2.75.6410.2.75.64
210.2.75.65/3210.2.75.65 – 10.2.75.6510.2.75.65
310.2.75.66/3210.2.75.66 – 10.2.75.6610.2.75.66
410.2.75.67/3210.2.75.67 – 10.2.75.6710.2.75.67
510.2.75.68/3210.2.75.68 – 10.2.75.6810.2.75.68
610.2.75.69/3210.2.75.69 – 10.2.75.6910.2.75.69
710.2.75.70/3210.2.75.70 – 10.2.75.7010.2.75.70
810.2.75.71/3210.2.75.71 – 10.2.75.7110.2.75.71
910.2.75.72/3210.2.75.72 – 10.2.75.7210.2.75.72
1010.2.75.73/3210.2.75.73 – 10.2.75.7310.2.75.73
1110.2.75.74/3210.2.75.74 – 10.2.75.7410.2.75.74
1210.2.75.75/3210.2.75.75 – 10.2.75.7510.2.75.75
1310.2.75.76/3210.2.75.76 – 10.2.75.7610.2.75.76
1410.2.75.77/3210.2.75.77 – 10.2.75.7710.2.75.77
1510.2.75.78/3210.2.75.78 – 10.2.75.7810.2.75.78
1610.2.75.79/3210.2.75.79 – 10.2.75.7910.2.75.79
1710.2.75.80/3210.2.75.80 – 10.2.75.8010.2.75.80
1810.2.75.81/3210.2.75.81 – 10.2.75.8110.2.75.81
1910.2.75.82/3210.2.75.82 – 10.2.75.8210.2.75.82
2010.2.75.83/3210.2.75.83 – 10.2.75.8310.2.75.83
2110.2.75.84/3210.2.75.84 – 10.2.75.8410.2.75.84
2210.2.75.85/3210.2.75.85 – 10.2.75.8510.2.75.85
2310.2.75.86/3210.2.75.86 – 10.2.75.8610.2.75.86
2410.2.75.87/3210.2.75.87 – 10.2.75.8710.2.75.87
2510.2.75.88/3210.2.75.88 – 10.2.75.8810.2.75.88
2610.2.75.89/3210.2.75.89 – 10.2.75.8910.2.75.89
2710.2.75.90/3210.2.75.90 – 10.2.75.9010.2.75.90
2810.2.75.91/3210.2.75.91 – 10.2.75.9110.2.75.91
2910.2.75.92/3210.2.75.92 – 10.2.75.9210.2.75.92
3010.2.75.93/3210.2.75.93 – 10.2.75.9310.2.75.93
3110.2.75.94/3210.2.75.94 – 10.2.75.9410.2.75.94
3210.2.75.95/3210.2.75.95 – 10.2.75.9510.2.75.95
3310.2.75.96/3210.2.75.96 – 10.2.75.9610.2.75.96
3410.2.75.97/3210.2.75.97 – 10.2.75.9710.2.75.97
3510.2.75.98/3210.2.75.98 – 10.2.75.9810.2.75.98
3610.2.75.99/3210.2.75.99 – 10.2.75.9910.2.75.99
3710.2.75.100/3210.2.75.100 – 10.2.75.10010.2.75.100
3810.2.75.101/3210.2.75.101 – 10.2.75.10110.2.75.101
3910.2.75.102/3210.2.75.102 – 10.2.75.10210.2.75.102
4010.2.75.103/3210.2.75.103 – 10.2.75.10310.2.75.103
4110.2.75.104/3210.2.75.104 – 10.2.75.10410.2.75.104
4210.2.75.105/3210.2.75.105 – 10.2.75.10510.2.75.105
4310.2.75.106/3210.2.75.106 – 10.2.75.10610.2.75.106
4410.2.75.107/3210.2.75.107 – 10.2.75.10710.2.75.107
4510.2.75.108/3210.2.75.108 – 10.2.75.10810.2.75.108
4610.2.75.109/3210.2.75.109 – 10.2.75.10910.2.75.109
4710.2.75.110/3210.2.75.110 – 10.2.75.11010.2.75.110
4810.2.75.111/3210.2.75.111 – 10.2.75.11110.2.75.111
4910.2.75.112/3210.2.75.112 – 10.2.75.11210.2.75.112
5010.2.75.113/3210.2.75.113 – 10.2.75.11310.2.75.113
5110.2.75.114/3210.2.75.114 – 10.2.75.11410.2.75.114
5210.2.75.115/3210.2.75.115 – 10.2.75.11510.2.75.115
5310.2.75.116/3210.2.75.116 – 10.2.75.11610.2.75.116
5410.2.75.117/3210.2.75.117 – 10.2.75.11710.2.75.117
5510.2.75.118/3210.2.75.118 – 10.2.75.11810.2.75.118
5610.2.75.119/3210.2.75.119 – 10.2.75.11910.2.75.119
5710.2.75.120/3210.2.75.120 – 10.2.75.12010.2.75.120
5810.2.75.121/3210.2.75.121 – 10.2.75.12110.2.75.121
5910.2.75.122/3210.2.75.122 – 10.2.75.12210.2.75.122
6010.2.75.123/3210.2.75.123 – 10.2.75.12310.2.75.123
6110.2.75.124/3210.2.75.124 – 10.2.75.12410.2.75.124
6210.2.75.125/3210.2.75.125 – 10.2.75.12510.2.75.125
6310.2.75.126/3210.2.75.126 – 10.2.75.12610.2.75.126
6410.2.75.127/3210.2.75.127 – 10.2.75.12710.2.75.127
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 →