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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)10.131.69.64/26
network10.131.69.64/26
broadcast10.131.69.127
first host10.131.69.65
last host10.131.69.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.131.69.64/26
address00001010.10000011.01000101.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10000011.01000101.01000000
broadcast00001010.10000011.01000101.01111111
green = network part, grey = host part
hex0x0a834540
decimal176375104
reverse dns64.69.131.10.in-addr.arpa
ipv4-mapped::ffff:a83:4540

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.131.69.64/3210.131.69.64 – 10.131.69.6410.131.69.64
210.131.69.65/3210.131.69.65 – 10.131.69.6510.131.69.65
310.131.69.66/3210.131.69.66 – 10.131.69.6610.131.69.66
410.131.69.67/3210.131.69.67 – 10.131.69.6710.131.69.67
510.131.69.68/3210.131.69.68 – 10.131.69.6810.131.69.68
610.131.69.69/3210.131.69.69 – 10.131.69.6910.131.69.69
710.131.69.70/3210.131.69.70 – 10.131.69.7010.131.69.70
810.131.69.71/3210.131.69.71 – 10.131.69.7110.131.69.71
910.131.69.72/3210.131.69.72 – 10.131.69.7210.131.69.72
1010.131.69.73/3210.131.69.73 – 10.131.69.7310.131.69.73
1110.131.69.74/3210.131.69.74 – 10.131.69.7410.131.69.74
1210.131.69.75/3210.131.69.75 – 10.131.69.7510.131.69.75
1310.131.69.76/3210.131.69.76 – 10.131.69.7610.131.69.76
1410.131.69.77/3210.131.69.77 – 10.131.69.7710.131.69.77
1510.131.69.78/3210.131.69.78 – 10.131.69.7810.131.69.78
1610.131.69.79/3210.131.69.79 – 10.131.69.7910.131.69.79
1710.131.69.80/3210.131.69.80 – 10.131.69.8010.131.69.80
1810.131.69.81/3210.131.69.81 – 10.131.69.8110.131.69.81
1910.131.69.82/3210.131.69.82 – 10.131.69.8210.131.69.82
2010.131.69.83/3210.131.69.83 – 10.131.69.8310.131.69.83
2110.131.69.84/3210.131.69.84 – 10.131.69.8410.131.69.84
2210.131.69.85/3210.131.69.85 – 10.131.69.8510.131.69.85
2310.131.69.86/3210.131.69.86 – 10.131.69.8610.131.69.86
2410.131.69.87/3210.131.69.87 – 10.131.69.8710.131.69.87
2510.131.69.88/3210.131.69.88 – 10.131.69.8810.131.69.88
2610.131.69.89/3210.131.69.89 – 10.131.69.8910.131.69.89
2710.131.69.90/3210.131.69.90 – 10.131.69.9010.131.69.90
2810.131.69.91/3210.131.69.91 – 10.131.69.9110.131.69.91
2910.131.69.92/3210.131.69.92 – 10.131.69.9210.131.69.92
3010.131.69.93/3210.131.69.93 – 10.131.69.9310.131.69.93
3110.131.69.94/3210.131.69.94 – 10.131.69.9410.131.69.94
3210.131.69.95/3210.131.69.95 – 10.131.69.9510.131.69.95
3310.131.69.96/3210.131.69.96 – 10.131.69.9610.131.69.96
3410.131.69.97/3210.131.69.97 – 10.131.69.9710.131.69.97
3510.131.69.98/3210.131.69.98 – 10.131.69.9810.131.69.98
3610.131.69.99/3210.131.69.99 – 10.131.69.9910.131.69.99
3710.131.69.100/3210.131.69.100 – 10.131.69.10010.131.69.100
3810.131.69.101/3210.131.69.101 – 10.131.69.10110.131.69.101
3910.131.69.102/3210.131.69.102 – 10.131.69.10210.131.69.102
4010.131.69.103/3210.131.69.103 – 10.131.69.10310.131.69.103
4110.131.69.104/3210.131.69.104 – 10.131.69.10410.131.69.104
4210.131.69.105/3210.131.69.105 – 10.131.69.10510.131.69.105
4310.131.69.106/3210.131.69.106 – 10.131.69.10610.131.69.106
4410.131.69.107/3210.131.69.107 – 10.131.69.10710.131.69.107
4510.131.69.108/3210.131.69.108 – 10.131.69.10810.131.69.108
4610.131.69.109/3210.131.69.109 – 10.131.69.10910.131.69.109
4710.131.69.110/3210.131.69.110 – 10.131.69.11010.131.69.110
4810.131.69.111/3210.131.69.111 – 10.131.69.11110.131.69.111
4910.131.69.112/3210.131.69.112 – 10.131.69.11210.131.69.112
5010.131.69.113/3210.131.69.113 – 10.131.69.11310.131.69.113
5110.131.69.114/3210.131.69.114 – 10.131.69.11410.131.69.114
5210.131.69.115/3210.131.69.115 – 10.131.69.11510.131.69.115
5310.131.69.116/3210.131.69.116 – 10.131.69.11610.131.69.116
5410.131.69.117/3210.131.69.117 – 10.131.69.11710.131.69.117
5510.131.69.118/3210.131.69.118 – 10.131.69.11810.131.69.118
5610.131.69.119/3210.131.69.119 – 10.131.69.11910.131.69.119
5710.131.69.120/3210.131.69.120 – 10.131.69.12010.131.69.120
5810.131.69.121/3210.131.69.121 – 10.131.69.12110.131.69.121
5910.131.69.122/3210.131.69.122 – 10.131.69.12210.131.69.122
6010.131.69.123/3210.131.69.123 – 10.131.69.12310.131.69.123
6110.131.69.124/3210.131.69.124 – 10.131.69.12410.131.69.124
6210.131.69.125/3210.131.69.125 – 10.131.69.12510.131.69.125
6310.131.69.126/3210.131.69.126 – 10.131.69.12610.131.69.126
6410.131.69.127/3210.131.69.127 – 10.131.69.12710.131.69.127
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 →