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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)10.80.48.64/26
network10.80.48.64/26
broadcast10.80.48.127
first host10.80.48.65
last host10.80.48.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.80.48.64/26
address00001010.01010000.00110000.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01010000.00110000.01000000
broadcast00001010.01010000.00110000.01111111
green = network part, grey = host part
hex0x0a503040
decimal173027392
reverse dns64.48.80.10.in-addr.arpa
ipv4-mapped::ffff:a50:3040

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.80.48.64/3210.80.48.64 – 10.80.48.6410.80.48.64
210.80.48.65/3210.80.48.65 – 10.80.48.6510.80.48.65
310.80.48.66/3210.80.48.66 – 10.80.48.6610.80.48.66
410.80.48.67/3210.80.48.67 – 10.80.48.6710.80.48.67
510.80.48.68/3210.80.48.68 – 10.80.48.6810.80.48.68
610.80.48.69/3210.80.48.69 – 10.80.48.6910.80.48.69
710.80.48.70/3210.80.48.70 – 10.80.48.7010.80.48.70
810.80.48.71/3210.80.48.71 – 10.80.48.7110.80.48.71
910.80.48.72/3210.80.48.72 – 10.80.48.7210.80.48.72
1010.80.48.73/3210.80.48.73 – 10.80.48.7310.80.48.73
1110.80.48.74/3210.80.48.74 – 10.80.48.7410.80.48.74
1210.80.48.75/3210.80.48.75 – 10.80.48.7510.80.48.75
1310.80.48.76/3210.80.48.76 – 10.80.48.7610.80.48.76
1410.80.48.77/3210.80.48.77 – 10.80.48.7710.80.48.77
1510.80.48.78/3210.80.48.78 – 10.80.48.7810.80.48.78
1610.80.48.79/3210.80.48.79 – 10.80.48.7910.80.48.79
1710.80.48.80/3210.80.48.80 – 10.80.48.8010.80.48.80
1810.80.48.81/3210.80.48.81 – 10.80.48.8110.80.48.81
1910.80.48.82/3210.80.48.82 – 10.80.48.8210.80.48.82
2010.80.48.83/3210.80.48.83 – 10.80.48.8310.80.48.83
2110.80.48.84/3210.80.48.84 – 10.80.48.8410.80.48.84
2210.80.48.85/3210.80.48.85 – 10.80.48.8510.80.48.85
2310.80.48.86/3210.80.48.86 – 10.80.48.8610.80.48.86
2410.80.48.87/3210.80.48.87 – 10.80.48.8710.80.48.87
2510.80.48.88/3210.80.48.88 – 10.80.48.8810.80.48.88
2610.80.48.89/3210.80.48.89 – 10.80.48.8910.80.48.89
2710.80.48.90/3210.80.48.90 – 10.80.48.9010.80.48.90
2810.80.48.91/3210.80.48.91 – 10.80.48.9110.80.48.91
2910.80.48.92/3210.80.48.92 – 10.80.48.9210.80.48.92
3010.80.48.93/3210.80.48.93 – 10.80.48.9310.80.48.93
3110.80.48.94/3210.80.48.94 – 10.80.48.9410.80.48.94
3210.80.48.95/3210.80.48.95 – 10.80.48.9510.80.48.95
3310.80.48.96/3210.80.48.96 – 10.80.48.9610.80.48.96
3410.80.48.97/3210.80.48.97 – 10.80.48.9710.80.48.97
3510.80.48.98/3210.80.48.98 – 10.80.48.9810.80.48.98
3610.80.48.99/3210.80.48.99 – 10.80.48.9910.80.48.99
3710.80.48.100/3210.80.48.100 – 10.80.48.10010.80.48.100
3810.80.48.101/3210.80.48.101 – 10.80.48.10110.80.48.101
3910.80.48.102/3210.80.48.102 – 10.80.48.10210.80.48.102
4010.80.48.103/3210.80.48.103 – 10.80.48.10310.80.48.103
4110.80.48.104/3210.80.48.104 – 10.80.48.10410.80.48.104
4210.80.48.105/3210.80.48.105 – 10.80.48.10510.80.48.105
4310.80.48.106/3210.80.48.106 – 10.80.48.10610.80.48.106
4410.80.48.107/3210.80.48.107 – 10.80.48.10710.80.48.107
4510.80.48.108/3210.80.48.108 – 10.80.48.10810.80.48.108
4610.80.48.109/3210.80.48.109 – 10.80.48.10910.80.48.109
4710.80.48.110/3210.80.48.110 – 10.80.48.11010.80.48.110
4810.80.48.111/3210.80.48.111 – 10.80.48.11110.80.48.111
4910.80.48.112/3210.80.48.112 – 10.80.48.11210.80.48.112
5010.80.48.113/3210.80.48.113 – 10.80.48.11310.80.48.113
5110.80.48.114/3210.80.48.114 – 10.80.48.11410.80.48.114
5210.80.48.115/3210.80.48.115 – 10.80.48.11510.80.48.115
5310.80.48.116/3210.80.48.116 – 10.80.48.11610.80.48.116
5410.80.48.117/3210.80.48.117 – 10.80.48.11710.80.48.117
5510.80.48.118/3210.80.48.118 – 10.80.48.11810.80.48.118
5610.80.48.119/3210.80.48.119 – 10.80.48.11910.80.48.119
5710.80.48.120/3210.80.48.120 – 10.80.48.12010.80.48.120
5810.80.48.121/3210.80.48.121 – 10.80.48.12110.80.48.121
5910.80.48.122/3210.80.48.122 – 10.80.48.12210.80.48.122
6010.80.48.123/3210.80.48.123 – 10.80.48.12310.80.48.123
6110.80.48.124/3210.80.48.124 – 10.80.48.12410.80.48.124
6210.80.48.125/3210.80.48.125 – 10.80.48.12510.80.48.125
6310.80.48.126/3210.80.48.126 – 10.80.48.12610.80.48.126
6410.80.48.127/3210.80.48.127 – 10.80.48.12710.80.48.127
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 →