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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)10.7.237.64/26
network10.7.237.64/26
broadcast10.7.237.127
first host10.7.237.65
last host10.7.237.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.7.237.64/26
address00001010.00000111.11101101.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000111.11101101.01000000
broadcast00001010.00000111.11101101.01111111
green = network part, grey = host part
hex0x0a07ed40
decimal168291648
reverse dns64.237.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:ed40

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.7.237.64/3210.7.237.64 – 10.7.237.6410.7.237.64
210.7.237.65/3210.7.237.65 – 10.7.237.6510.7.237.65
310.7.237.66/3210.7.237.66 – 10.7.237.6610.7.237.66
410.7.237.67/3210.7.237.67 – 10.7.237.6710.7.237.67
510.7.237.68/3210.7.237.68 – 10.7.237.6810.7.237.68
610.7.237.69/3210.7.237.69 – 10.7.237.6910.7.237.69
710.7.237.70/3210.7.237.70 – 10.7.237.7010.7.237.70
810.7.237.71/3210.7.237.71 – 10.7.237.7110.7.237.71
910.7.237.72/3210.7.237.72 – 10.7.237.7210.7.237.72
1010.7.237.73/3210.7.237.73 – 10.7.237.7310.7.237.73
1110.7.237.74/3210.7.237.74 – 10.7.237.7410.7.237.74
1210.7.237.75/3210.7.237.75 – 10.7.237.7510.7.237.75
1310.7.237.76/3210.7.237.76 – 10.7.237.7610.7.237.76
1410.7.237.77/3210.7.237.77 – 10.7.237.7710.7.237.77
1510.7.237.78/3210.7.237.78 – 10.7.237.7810.7.237.78
1610.7.237.79/3210.7.237.79 – 10.7.237.7910.7.237.79
1710.7.237.80/3210.7.237.80 – 10.7.237.8010.7.237.80
1810.7.237.81/3210.7.237.81 – 10.7.237.8110.7.237.81
1910.7.237.82/3210.7.237.82 – 10.7.237.8210.7.237.82
2010.7.237.83/3210.7.237.83 – 10.7.237.8310.7.237.83
2110.7.237.84/3210.7.237.84 – 10.7.237.8410.7.237.84
2210.7.237.85/3210.7.237.85 – 10.7.237.8510.7.237.85
2310.7.237.86/3210.7.237.86 – 10.7.237.8610.7.237.86
2410.7.237.87/3210.7.237.87 – 10.7.237.8710.7.237.87
2510.7.237.88/3210.7.237.88 – 10.7.237.8810.7.237.88
2610.7.237.89/3210.7.237.89 – 10.7.237.8910.7.237.89
2710.7.237.90/3210.7.237.90 – 10.7.237.9010.7.237.90
2810.7.237.91/3210.7.237.91 – 10.7.237.9110.7.237.91
2910.7.237.92/3210.7.237.92 – 10.7.237.9210.7.237.92
3010.7.237.93/3210.7.237.93 – 10.7.237.9310.7.237.93
3110.7.237.94/3210.7.237.94 – 10.7.237.9410.7.237.94
3210.7.237.95/3210.7.237.95 – 10.7.237.9510.7.237.95
3310.7.237.96/3210.7.237.96 – 10.7.237.9610.7.237.96
3410.7.237.97/3210.7.237.97 – 10.7.237.9710.7.237.97
3510.7.237.98/3210.7.237.98 – 10.7.237.9810.7.237.98
3610.7.237.99/3210.7.237.99 – 10.7.237.9910.7.237.99
3710.7.237.100/3210.7.237.100 – 10.7.237.10010.7.237.100
3810.7.237.101/3210.7.237.101 – 10.7.237.10110.7.237.101
3910.7.237.102/3210.7.237.102 – 10.7.237.10210.7.237.102
4010.7.237.103/3210.7.237.103 – 10.7.237.10310.7.237.103
4110.7.237.104/3210.7.237.104 – 10.7.237.10410.7.237.104
4210.7.237.105/3210.7.237.105 – 10.7.237.10510.7.237.105
4310.7.237.106/3210.7.237.106 – 10.7.237.10610.7.237.106
4410.7.237.107/3210.7.237.107 – 10.7.237.10710.7.237.107
4510.7.237.108/3210.7.237.108 – 10.7.237.10810.7.237.108
4610.7.237.109/3210.7.237.109 – 10.7.237.10910.7.237.109
4710.7.237.110/3210.7.237.110 – 10.7.237.11010.7.237.110
4810.7.237.111/3210.7.237.111 – 10.7.237.11110.7.237.111
4910.7.237.112/3210.7.237.112 – 10.7.237.11210.7.237.112
5010.7.237.113/3210.7.237.113 – 10.7.237.11310.7.237.113
5110.7.237.114/3210.7.237.114 – 10.7.237.11410.7.237.114
5210.7.237.115/3210.7.237.115 – 10.7.237.11510.7.237.115
5310.7.237.116/3210.7.237.116 – 10.7.237.11610.7.237.116
5410.7.237.117/3210.7.237.117 – 10.7.237.11710.7.237.117
5510.7.237.118/3210.7.237.118 – 10.7.237.11810.7.237.118
5610.7.237.119/3210.7.237.119 – 10.7.237.11910.7.237.119
5710.7.237.120/3210.7.237.120 – 10.7.237.12010.7.237.120
5810.7.237.121/3210.7.237.121 – 10.7.237.12110.7.237.121
5910.7.237.122/3210.7.237.122 – 10.7.237.12210.7.237.122
6010.7.237.123/3210.7.237.123 – 10.7.237.12310.7.237.123
6110.7.237.124/3210.7.237.124 – 10.7.237.12410.7.237.124
6210.7.237.125/3210.7.237.125 – 10.7.237.12510.7.237.125
6310.7.237.126/3210.7.237.126 – 10.7.237.12610.7.237.126
6410.7.237.127/3210.7.237.127 – 10.7.237.12710.7.237.127
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 →