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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)10.75.167.64/26
network10.75.167.64/26
broadcast10.75.167.127
first host10.75.167.65
last host10.75.167.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.75.167.64/26
address00001010.01001011.10100111.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001011.10100111.01000000
broadcast00001010.01001011.10100111.01111111
green = network part, grey = host part
hex0x0a4ba740
decimal172730176
reverse dns64.167.75.10.in-addr.arpa
ipv4-mapped::ffff:a4b:a740

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.75.167.64/3210.75.167.64 – 10.75.167.6410.75.167.64
210.75.167.65/3210.75.167.65 – 10.75.167.6510.75.167.65
310.75.167.66/3210.75.167.66 – 10.75.167.6610.75.167.66
410.75.167.67/3210.75.167.67 – 10.75.167.6710.75.167.67
510.75.167.68/3210.75.167.68 – 10.75.167.6810.75.167.68
610.75.167.69/3210.75.167.69 – 10.75.167.6910.75.167.69
710.75.167.70/3210.75.167.70 – 10.75.167.7010.75.167.70
810.75.167.71/3210.75.167.71 – 10.75.167.7110.75.167.71
910.75.167.72/3210.75.167.72 – 10.75.167.7210.75.167.72
1010.75.167.73/3210.75.167.73 – 10.75.167.7310.75.167.73
1110.75.167.74/3210.75.167.74 – 10.75.167.7410.75.167.74
1210.75.167.75/3210.75.167.75 – 10.75.167.7510.75.167.75
1310.75.167.76/3210.75.167.76 – 10.75.167.7610.75.167.76
1410.75.167.77/3210.75.167.77 – 10.75.167.7710.75.167.77
1510.75.167.78/3210.75.167.78 – 10.75.167.7810.75.167.78
1610.75.167.79/3210.75.167.79 – 10.75.167.7910.75.167.79
1710.75.167.80/3210.75.167.80 – 10.75.167.8010.75.167.80
1810.75.167.81/3210.75.167.81 – 10.75.167.8110.75.167.81
1910.75.167.82/3210.75.167.82 – 10.75.167.8210.75.167.82
2010.75.167.83/3210.75.167.83 – 10.75.167.8310.75.167.83
2110.75.167.84/3210.75.167.84 – 10.75.167.8410.75.167.84
2210.75.167.85/3210.75.167.85 – 10.75.167.8510.75.167.85
2310.75.167.86/3210.75.167.86 – 10.75.167.8610.75.167.86
2410.75.167.87/3210.75.167.87 – 10.75.167.8710.75.167.87
2510.75.167.88/3210.75.167.88 – 10.75.167.8810.75.167.88
2610.75.167.89/3210.75.167.89 – 10.75.167.8910.75.167.89
2710.75.167.90/3210.75.167.90 – 10.75.167.9010.75.167.90
2810.75.167.91/3210.75.167.91 – 10.75.167.9110.75.167.91
2910.75.167.92/3210.75.167.92 – 10.75.167.9210.75.167.92
3010.75.167.93/3210.75.167.93 – 10.75.167.9310.75.167.93
3110.75.167.94/3210.75.167.94 – 10.75.167.9410.75.167.94
3210.75.167.95/3210.75.167.95 – 10.75.167.9510.75.167.95
3310.75.167.96/3210.75.167.96 – 10.75.167.9610.75.167.96
3410.75.167.97/3210.75.167.97 – 10.75.167.9710.75.167.97
3510.75.167.98/3210.75.167.98 – 10.75.167.9810.75.167.98
3610.75.167.99/3210.75.167.99 – 10.75.167.9910.75.167.99
3710.75.167.100/3210.75.167.100 – 10.75.167.10010.75.167.100
3810.75.167.101/3210.75.167.101 – 10.75.167.10110.75.167.101
3910.75.167.102/3210.75.167.102 – 10.75.167.10210.75.167.102
4010.75.167.103/3210.75.167.103 – 10.75.167.10310.75.167.103
4110.75.167.104/3210.75.167.104 – 10.75.167.10410.75.167.104
4210.75.167.105/3210.75.167.105 – 10.75.167.10510.75.167.105
4310.75.167.106/3210.75.167.106 – 10.75.167.10610.75.167.106
4410.75.167.107/3210.75.167.107 – 10.75.167.10710.75.167.107
4510.75.167.108/3210.75.167.108 – 10.75.167.10810.75.167.108
4610.75.167.109/3210.75.167.109 – 10.75.167.10910.75.167.109
4710.75.167.110/3210.75.167.110 – 10.75.167.11010.75.167.110
4810.75.167.111/3210.75.167.111 – 10.75.167.11110.75.167.111
4910.75.167.112/3210.75.167.112 – 10.75.167.11210.75.167.112
5010.75.167.113/3210.75.167.113 – 10.75.167.11310.75.167.113
5110.75.167.114/3210.75.167.114 – 10.75.167.11410.75.167.114
5210.75.167.115/3210.75.167.115 – 10.75.167.11510.75.167.115
5310.75.167.116/3210.75.167.116 – 10.75.167.11610.75.167.116
5410.75.167.117/3210.75.167.117 – 10.75.167.11710.75.167.117
5510.75.167.118/3210.75.167.118 – 10.75.167.11810.75.167.118
5610.75.167.119/3210.75.167.119 – 10.75.167.11910.75.167.119
5710.75.167.120/3210.75.167.120 – 10.75.167.12010.75.167.120
5810.75.167.121/3210.75.167.121 – 10.75.167.12110.75.167.121
5910.75.167.122/3210.75.167.122 – 10.75.167.12210.75.167.122
6010.75.167.123/3210.75.167.123 – 10.75.167.12310.75.167.123
6110.75.167.124/3210.75.167.124 – 10.75.167.12410.75.167.124
6210.75.167.125/3210.75.167.125 – 10.75.167.12510.75.167.125
6310.75.167.126/3210.75.167.126 – 10.75.167.12610.75.167.126
6410.75.167.127/3210.75.167.127 – 10.75.167.12710.75.167.127
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 →