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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)10.3.183.64/26
network10.3.183.64/26
broadcast10.3.183.127
first host10.3.183.65
last host10.3.183.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.183.64/26
address00001010.00000011.10110111.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.10110111.01000000
broadcast00001010.00000011.10110111.01111111
green = network part, grey = host part
hex0x0a03b740
decimal168015680
reverse dns64.183.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:b740

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.183.64/3210.3.183.64 – 10.3.183.6410.3.183.64
210.3.183.65/3210.3.183.65 – 10.3.183.6510.3.183.65
310.3.183.66/3210.3.183.66 – 10.3.183.6610.3.183.66
410.3.183.67/3210.3.183.67 – 10.3.183.6710.3.183.67
510.3.183.68/3210.3.183.68 – 10.3.183.6810.3.183.68
610.3.183.69/3210.3.183.69 – 10.3.183.6910.3.183.69
710.3.183.70/3210.3.183.70 – 10.3.183.7010.3.183.70
810.3.183.71/3210.3.183.71 – 10.3.183.7110.3.183.71
910.3.183.72/3210.3.183.72 – 10.3.183.7210.3.183.72
1010.3.183.73/3210.3.183.73 – 10.3.183.7310.3.183.73
1110.3.183.74/3210.3.183.74 – 10.3.183.7410.3.183.74
1210.3.183.75/3210.3.183.75 – 10.3.183.7510.3.183.75
1310.3.183.76/3210.3.183.76 – 10.3.183.7610.3.183.76
1410.3.183.77/3210.3.183.77 – 10.3.183.7710.3.183.77
1510.3.183.78/3210.3.183.78 – 10.3.183.7810.3.183.78
1610.3.183.79/3210.3.183.79 – 10.3.183.7910.3.183.79
1710.3.183.80/3210.3.183.80 – 10.3.183.8010.3.183.80
1810.3.183.81/3210.3.183.81 – 10.3.183.8110.3.183.81
1910.3.183.82/3210.3.183.82 – 10.3.183.8210.3.183.82
2010.3.183.83/3210.3.183.83 – 10.3.183.8310.3.183.83
2110.3.183.84/3210.3.183.84 – 10.3.183.8410.3.183.84
2210.3.183.85/3210.3.183.85 – 10.3.183.8510.3.183.85
2310.3.183.86/3210.3.183.86 – 10.3.183.8610.3.183.86
2410.3.183.87/3210.3.183.87 – 10.3.183.8710.3.183.87
2510.3.183.88/3210.3.183.88 – 10.3.183.8810.3.183.88
2610.3.183.89/3210.3.183.89 – 10.3.183.8910.3.183.89
2710.3.183.90/3210.3.183.90 – 10.3.183.9010.3.183.90
2810.3.183.91/3210.3.183.91 – 10.3.183.9110.3.183.91
2910.3.183.92/3210.3.183.92 – 10.3.183.9210.3.183.92
3010.3.183.93/3210.3.183.93 – 10.3.183.9310.3.183.93
3110.3.183.94/3210.3.183.94 – 10.3.183.9410.3.183.94
3210.3.183.95/3210.3.183.95 – 10.3.183.9510.3.183.95
3310.3.183.96/3210.3.183.96 – 10.3.183.9610.3.183.96
3410.3.183.97/3210.3.183.97 – 10.3.183.9710.3.183.97
3510.3.183.98/3210.3.183.98 – 10.3.183.9810.3.183.98
3610.3.183.99/3210.3.183.99 – 10.3.183.9910.3.183.99
3710.3.183.100/3210.3.183.100 – 10.3.183.10010.3.183.100
3810.3.183.101/3210.3.183.101 – 10.3.183.10110.3.183.101
3910.3.183.102/3210.3.183.102 – 10.3.183.10210.3.183.102
4010.3.183.103/3210.3.183.103 – 10.3.183.10310.3.183.103
4110.3.183.104/3210.3.183.104 – 10.3.183.10410.3.183.104
4210.3.183.105/3210.3.183.105 – 10.3.183.10510.3.183.105
4310.3.183.106/3210.3.183.106 – 10.3.183.10610.3.183.106
4410.3.183.107/3210.3.183.107 – 10.3.183.10710.3.183.107
4510.3.183.108/3210.3.183.108 – 10.3.183.10810.3.183.108
4610.3.183.109/3210.3.183.109 – 10.3.183.10910.3.183.109
4710.3.183.110/3210.3.183.110 – 10.3.183.11010.3.183.110
4810.3.183.111/3210.3.183.111 – 10.3.183.11110.3.183.111
4910.3.183.112/3210.3.183.112 – 10.3.183.11210.3.183.112
5010.3.183.113/3210.3.183.113 – 10.3.183.11310.3.183.113
5110.3.183.114/3210.3.183.114 – 10.3.183.11410.3.183.114
5210.3.183.115/3210.3.183.115 – 10.3.183.11510.3.183.115
5310.3.183.116/3210.3.183.116 – 10.3.183.11610.3.183.116
5410.3.183.117/3210.3.183.117 – 10.3.183.11710.3.183.117
5510.3.183.118/3210.3.183.118 – 10.3.183.11810.3.183.118
5610.3.183.119/3210.3.183.119 – 10.3.183.11910.3.183.119
5710.3.183.120/3210.3.183.120 – 10.3.183.12010.3.183.120
5810.3.183.121/3210.3.183.121 – 10.3.183.12110.3.183.121
5910.3.183.122/3210.3.183.122 – 10.3.183.12210.3.183.122
6010.3.183.123/3210.3.183.123 – 10.3.183.12310.3.183.123
6110.3.183.124/3210.3.183.124 – 10.3.183.12410.3.183.124
6210.3.183.125/3210.3.183.125 – 10.3.183.12510.3.183.125
6310.3.183.126/3210.3.183.126 – 10.3.183.12610.3.183.126
6410.3.183.127/3210.3.183.127 – 10.3.183.12710.3.183.127
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 →