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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)10.75.131.64/26
network10.75.131.64/26
broadcast10.75.131.127
first host10.75.131.65
last host10.75.131.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.75.131.64/26
address00001010.01001011.10000011.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001011.10000011.01000000
broadcast00001010.01001011.10000011.01111111
green = network part, grey = host part
hex0x0a4b8340
decimal172720960
reverse dns64.131.75.10.in-addr.arpa
ipv4-mapped::ffff:a4b:8340

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.75.131.64/3210.75.131.64 – 10.75.131.6410.75.131.64
210.75.131.65/3210.75.131.65 – 10.75.131.6510.75.131.65
310.75.131.66/3210.75.131.66 – 10.75.131.6610.75.131.66
410.75.131.67/3210.75.131.67 – 10.75.131.6710.75.131.67
510.75.131.68/3210.75.131.68 – 10.75.131.6810.75.131.68
610.75.131.69/3210.75.131.69 – 10.75.131.6910.75.131.69
710.75.131.70/3210.75.131.70 – 10.75.131.7010.75.131.70
810.75.131.71/3210.75.131.71 – 10.75.131.7110.75.131.71
910.75.131.72/3210.75.131.72 – 10.75.131.7210.75.131.72
1010.75.131.73/3210.75.131.73 – 10.75.131.7310.75.131.73
1110.75.131.74/3210.75.131.74 – 10.75.131.7410.75.131.74
1210.75.131.75/3210.75.131.75 – 10.75.131.7510.75.131.75
1310.75.131.76/3210.75.131.76 – 10.75.131.7610.75.131.76
1410.75.131.77/3210.75.131.77 – 10.75.131.7710.75.131.77
1510.75.131.78/3210.75.131.78 – 10.75.131.7810.75.131.78
1610.75.131.79/3210.75.131.79 – 10.75.131.7910.75.131.79
1710.75.131.80/3210.75.131.80 – 10.75.131.8010.75.131.80
1810.75.131.81/3210.75.131.81 – 10.75.131.8110.75.131.81
1910.75.131.82/3210.75.131.82 – 10.75.131.8210.75.131.82
2010.75.131.83/3210.75.131.83 – 10.75.131.8310.75.131.83
2110.75.131.84/3210.75.131.84 – 10.75.131.8410.75.131.84
2210.75.131.85/3210.75.131.85 – 10.75.131.8510.75.131.85
2310.75.131.86/3210.75.131.86 – 10.75.131.8610.75.131.86
2410.75.131.87/3210.75.131.87 – 10.75.131.8710.75.131.87
2510.75.131.88/3210.75.131.88 – 10.75.131.8810.75.131.88
2610.75.131.89/3210.75.131.89 – 10.75.131.8910.75.131.89
2710.75.131.90/3210.75.131.90 – 10.75.131.9010.75.131.90
2810.75.131.91/3210.75.131.91 – 10.75.131.9110.75.131.91
2910.75.131.92/3210.75.131.92 – 10.75.131.9210.75.131.92
3010.75.131.93/3210.75.131.93 – 10.75.131.9310.75.131.93
3110.75.131.94/3210.75.131.94 – 10.75.131.9410.75.131.94
3210.75.131.95/3210.75.131.95 – 10.75.131.9510.75.131.95
3310.75.131.96/3210.75.131.96 – 10.75.131.9610.75.131.96
3410.75.131.97/3210.75.131.97 – 10.75.131.9710.75.131.97
3510.75.131.98/3210.75.131.98 – 10.75.131.9810.75.131.98
3610.75.131.99/3210.75.131.99 – 10.75.131.9910.75.131.99
3710.75.131.100/3210.75.131.100 – 10.75.131.10010.75.131.100
3810.75.131.101/3210.75.131.101 – 10.75.131.10110.75.131.101
3910.75.131.102/3210.75.131.102 – 10.75.131.10210.75.131.102
4010.75.131.103/3210.75.131.103 – 10.75.131.10310.75.131.103
4110.75.131.104/3210.75.131.104 – 10.75.131.10410.75.131.104
4210.75.131.105/3210.75.131.105 – 10.75.131.10510.75.131.105
4310.75.131.106/3210.75.131.106 – 10.75.131.10610.75.131.106
4410.75.131.107/3210.75.131.107 – 10.75.131.10710.75.131.107
4510.75.131.108/3210.75.131.108 – 10.75.131.10810.75.131.108
4610.75.131.109/3210.75.131.109 – 10.75.131.10910.75.131.109
4710.75.131.110/3210.75.131.110 – 10.75.131.11010.75.131.110
4810.75.131.111/3210.75.131.111 – 10.75.131.11110.75.131.111
4910.75.131.112/3210.75.131.112 – 10.75.131.11210.75.131.112
5010.75.131.113/3210.75.131.113 – 10.75.131.11310.75.131.113
5110.75.131.114/3210.75.131.114 – 10.75.131.11410.75.131.114
5210.75.131.115/3210.75.131.115 – 10.75.131.11510.75.131.115
5310.75.131.116/3210.75.131.116 – 10.75.131.11610.75.131.116
5410.75.131.117/3210.75.131.117 – 10.75.131.11710.75.131.117
5510.75.131.118/3210.75.131.118 – 10.75.131.11810.75.131.118
5610.75.131.119/3210.75.131.119 – 10.75.131.11910.75.131.119
5710.75.131.120/3210.75.131.120 – 10.75.131.12010.75.131.120
5810.75.131.121/3210.75.131.121 – 10.75.131.12110.75.131.121
5910.75.131.122/3210.75.131.122 – 10.75.131.12210.75.131.122
6010.75.131.123/3210.75.131.123 – 10.75.131.12310.75.131.123
6110.75.131.124/3210.75.131.124 – 10.75.131.12410.75.131.124
6210.75.131.125/3210.75.131.125 – 10.75.131.12510.75.131.125
6310.75.131.126/3210.75.131.126 – 10.75.131.12610.75.131.126
6410.75.131.127/3210.75.131.127 – 10.75.131.12710.75.131.127
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 →