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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)10.76.103.64/26
network10.76.103.64/26
broadcast10.76.103.127
first host10.76.103.65
last host10.76.103.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.76.103.64/26
address00001010.01001100.01100111.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001100.01100111.01000000
broadcast00001010.01001100.01100111.01111111
green = network part, grey = host part
hex0x0a4c6740
decimal172779328
reverse dns64.103.76.10.in-addr.arpa
ipv4-mapped::ffff:a4c:6740

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.76.103.64/3210.76.103.64 – 10.76.103.6410.76.103.64
210.76.103.65/3210.76.103.65 – 10.76.103.6510.76.103.65
310.76.103.66/3210.76.103.66 – 10.76.103.6610.76.103.66
410.76.103.67/3210.76.103.67 – 10.76.103.6710.76.103.67
510.76.103.68/3210.76.103.68 – 10.76.103.6810.76.103.68
610.76.103.69/3210.76.103.69 – 10.76.103.6910.76.103.69
710.76.103.70/3210.76.103.70 – 10.76.103.7010.76.103.70
810.76.103.71/3210.76.103.71 – 10.76.103.7110.76.103.71
910.76.103.72/3210.76.103.72 – 10.76.103.7210.76.103.72
1010.76.103.73/3210.76.103.73 – 10.76.103.7310.76.103.73
1110.76.103.74/3210.76.103.74 – 10.76.103.7410.76.103.74
1210.76.103.75/3210.76.103.75 – 10.76.103.7510.76.103.75
1310.76.103.76/3210.76.103.76 – 10.76.103.7610.76.103.76
1410.76.103.77/3210.76.103.77 – 10.76.103.7710.76.103.77
1510.76.103.78/3210.76.103.78 – 10.76.103.7810.76.103.78
1610.76.103.79/3210.76.103.79 – 10.76.103.7910.76.103.79
1710.76.103.80/3210.76.103.80 – 10.76.103.8010.76.103.80
1810.76.103.81/3210.76.103.81 – 10.76.103.8110.76.103.81
1910.76.103.82/3210.76.103.82 – 10.76.103.8210.76.103.82
2010.76.103.83/3210.76.103.83 – 10.76.103.8310.76.103.83
2110.76.103.84/3210.76.103.84 – 10.76.103.8410.76.103.84
2210.76.103.85/3210.76.103.85 – 10.76.103.8510.76.103.85
2310.76.103.86/3210.76.103.86 – 10.76.103.8610.76.103.86
2410.76.103.87/3210.76.103.87 – 10.76.103.8710.76.103.87
2510.76.103.88/3210.76.103.88 – 10.76.103.8810.76.103.88
2610.76.103.89/3210.76.103.89 – 10.76.103.8910.76.103.89
2710.76.103.90/3210.76.103.90 – 10.76.103.9010.76.103.90
2810.76.103.91/3210.76.103.91 – 10.76.103.9110.76.103.91
2910.76.103.92/3210.76.103.92 – 10.76.103.9210.76.103.92
3010.76.103.93/3210.76.103.93 – 10.76.103.9310.76.103.93
3110.76.103.94/3210.76.103.94 – 10.76.103.9410.76.103.94
3210.76.103.95/3210.76.103.95 – 10.76.103.9510.76.103.95
3310.76.103.96/3210.76.103.96 – 10.76.103.9610.76.103.96
3410.76.103.97/3210.76.103.97 – 10.76.103.9710.76.103.97
3510.76.103.98/3210.76.103.98 – 10.76.103.9810.76.103.98
3610.76.103.99/3210.76.103.99 – 10.76.103.9910.76.103.99
3710.76.103.100/3210.76.103.100 – 10.76.103.10010.76.103.100
3810.76.103.101/3210.76.103.101 – 10.76.103.10110.76.103.101
3910.76.103.102/3210.76.103.102 – 10.76.103.10210.76.103.102
4010.76.103.103/3210.76.103.103 – 10.76.103.10310.76.103.103
4110.76.103.104/3210.76.103.104 – 10.76.103.10410.76.103.104
4210.76.103.105/3210.76.103.105 – 10.76.103.10510.76.103.105
4310.76.103.106/3210.76.103.106 – 10.76.103.10610.76.103.106
4410.76.103.107/3210.76.103.107 – 10.76.103.10710.76.103.107
4510.76.103.108/3210.76.103.108 – 10.76.103.10810.76.103.108
4610.76.103.109/3210.76.103.109 – 10.76.103.10910.76.103.109
4710.76.103.110/3210.76.103.110 – 10.76.103.11010.76.103.110
4810.76.103.111/3210.76.103.111 – 10.76.103.11110.76.103.111
4910.76.103.112/3210.76.103.112 – 10.76.103.11210.76.103.112
5010.76.103.113/3210.76.103.113 – 10.76.103.11310.76.103.113
5110.76.103.114/3210.76.103.114 – 10.76.103.11410.76.103.114
5210.76.103.115/3210.76.103.115 – 10.76.103.11510.76.103.115
5310.76.103.116/3210.76.103.116 – 10.76.103.11610.76.103.116
5410.76.103.117/3210.76.103.117 – 10.76.103.11710.76.103.117
5510.76.103.118/3210.76.103.118 – 10.76.103.11810.76.103.118
5610.76.103.119/3210.76.103.119 – 10.76.103.11910.76.103.119
5710.76.103.120/3210.76.103.120 – 10.76.103.12010.76.103.120
5810.76.103.121/3210.76.103.121 – 10.76.103.12110.76.103.121
5910.76.103.122/3210.76.103.122 – 10.76.103.12210.76.103.122
6010.76.103.123/3210.76.103.123 – 10.76.103.12310.76.103.123
6110.76.103.124/3210.76.103.124 – 10.76.103.12410.76.103.124
6210.76.103.125/3210.76.103.125 – 10.76.103.12510.76.103.125
6310.76.103.126/3210.76.103.126 – 10.76.103.12610.76.103.126
6410.76.103.127/3210.76.103.127 – 10.76.103.12710.76.103.127
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 →