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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)10.72.149.64/26
network10.72.149.64/26
broadcast10.72.149.127
first host10.72.149.65
last host10.72.149.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.72.149.64/26
address00001010.01001000.10010101.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001000.10010101.01000000
broadcast00001010.01001000.10010101.01111111
green = network part, grey = host part
hex0x0a489540
decimal172528960
reverse dns64.149.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:9540

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.72.149.64/3210.72.149.64 – 10.72.149.6410.72.149.64
210.72.149.65/3210.72.149.65 – 10.72.149.6510.72.149.65
310.72.149.66/3210.72.149.66 – 10.72.149.6610.72.149.66
410.72.149.67/3210.72.149.67 – 10.72.149.6710.72.149.67
510.72.149.68/3210.72.149.68 – 10.72.149.6810.72.149.68
610.72.149.69/3210.72.149.69 – 10.72.149.6910.72.149.69
710.72.149.70/3210.72.149.70 – 10.72.149.7010.72.149.70
810.72.149.71/3210.72.149.71 – 10.72.149.7110.72.149.71
910.72.149.72/3210.72.149.72 – 10.72.149.7210.72.149.72
1010.72.149.73/3210.72.149.73 – 10.72.149.7310.72.149.73
1110.72.149.74/3210.72.149.74 – 10.72.149.7410.72.149.74
1210.72.149.75/3210.72.149.75 – 10.72.149.7510.72.149.75
1310.72.149.76/3210.72.149.76 – 10.72.149.7610.72.149.76
1410.72.149.77/3210.72.149.77 – 10.72.149.7710.72.149.77
1510.72.149.78/3210.72.149.78 – 10.72.149.7810.72.149.78
1610.72.149.79/3210.72.149.79 – 10.72.149.7910.72.149.79
1710.72.149.80/3210.72.149.80 – 10.72.149.8010.72.149.80
1810.72.149.81/3210.72.149.81 – 10.72.149.8110.72.149.81
1910.72.149.82/3210.72.149.82 – 10.72.149.8210.72.149.82
2010.72.149.83/3210.72.149.83 – 10.72.149.8310.72.149.83
2110.72.149.84/3210.72.149.84 – 10.72.149.8410.72.149.84
2210.72.149.85/3210.72.149.85 – 10.72.149.8510.72.149.85
2310.72.149.86/3210.72.149.86 – 10.72.149.8610.72.149.86
2410.72.149.87/3210.72.149.87 – 10.72.149.8710.72.149.87
2510.72.149.88/3210.72.149.88 – 10.72.149.8810.72.149.88
2610.72.149.89/3210.72.149.89 – 10.72.149.8910.72.149.89
2710.72.149.90/3210.72.149.90 – 10.72.149.9010.72.149.90
2810.72.149.91/3210.72.149.91 – 10.72.149.9110.72.149.91
2910.72.149.92/3210.72.149.92 – 10.72.149.9210.72.149.92
3010.72.149.93/3210.72.149.93 – 10.72.149.9310.72.149.93
3110.72.149.94/3210.72.149.94 – 10.72.149.9410.72.149.94
3210.72.149.95/3210.72.149.95 – 10.72.149.9510.72.149.95
3310.72.149.96/3210.72.149.96 – 10.72.149.9610.72.149.96
3410.72.149.97/3210.72.149.97 – 10.72.149.9710.72.149.97
3510.72.149.98/3210.72.149.98 – 10.72.149.9810.72.149.98
3610.72.149.99/3210.72.149.99 – 10.72.149.9910.72.149.99
3710.72.149.100/3210.72.149.100 – 10.72.149.10010.72.149.100
3810.72.149.101/3210.72.149.101 – 10.72.149.10110.72.149.101
3910.72.149.102/3210.72.149.102 – 10.72.149.10210.72.149.102
4010.72.149.103/3210.72.149.103 – 10.72.149.10310.72.149.103
4110.72.149.104/3210.72.149.104 – 10.72.149.10410.72.149.104
4210.72.149.105/3210.72.149.105 – 10.72.149.10510.72.149.105
4310.72.149.106/3210.72.149.106 – 10.72.149.10610.72.149.106
4410.72.149.107/3210.72.149.107 – 10.72.149.10710.72.149.107
4510.72.149.108/3210.72.149.108 – 10.72.149.10810.72.149.108
4610.72.149.109/3210.72.149.109 – 10.72.149.10910.72.149.109
4710.72.149.110/3210.72.149.110 – 10.72.149.11010.72.149.110
4810.72.149.111/3210.72.149.111 – 10.72.149.11110.72.149.111
4910.72.149.112/3210.72.149.112 – 10.72.149.11210.72.149.112
5010.72.149.113/3210.72.149.113 – 10.72.149.11310.72.149.113
5110.72.149.114/3210.72.149.114 – 10.72.149.11410.72.149.114
5210.72.149.115/3210.72.149.115 – 10.72.149.11510.72.149.115
5310.72.149.116/3210.72.149.116 – 10.72.149.11610.72.149.116
5410.72.149.117/3210.72.149.117 – 10.72.149.11710.72.149.117
5510.72.149.118/3210.72.149.118 – 10.72.149.11810.72.149.118
5610.72.149.119/3210.72.149.119 – 10.72.149.11910.72.149.119
5710.72.149.120/3210.72.149.120 – 10.72.149.12010.72.149.120
5810.72.149.121/3210.72.149.121 – 10.72.149.12110.72.149.121
5910.72.149.122/3210.72.149.122 – 10.72.149.12210.72.149.122
6010.72.149.123/3210.72.149.123 – 10.72.149.12310.72.149.123
6110.72.149.124/3210.72.149.124 – 10.72.149.12410.72.149.124
6210.72.149.125/3210.72.149.125 – 10.72.149.12510.72.149.125
6310.72.149.126/3210.72.149.126 – 10.72.149.12610.72.149.126
6410.72.149.127/3210.72.149.127 – 10.72.149.12710.72.149.127
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 →