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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)10.232.151.64/26
network10.232.151.64/26
broadcast10.232.151.127
first host10.232.151.65
last host10.232.151.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.232.151.64/26
address00001010.11101000.10010111.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.11101000.10010111.01000000
broadcast00001010.11101000.10010111.01111111
green = network part, grey = host part
hex0x0ae89740
decimal183015232
reverse dns64.151.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:9740

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.232.151.64/3210.232.151.64 – 10.232.151.6410.232.151.64
210.232.151.65/3210.232.151.65 – 10.232.151.6510.232.151.65
310.232.151.66/3210.232.151.66 – 10.232.151.6610.232.151.66
410.232.151.67/3210.232.151.67 – 10.232.151.6710.232.151.67
510.232.151.68/3210.232.151.68 – 10.232.151.6810.232.151.68
610.232.151.69/3210.232.151.69 – 10.232.151.6910.232.151.69
710.232.151.70/3210.232.151.70 – 10.232.151.7010.232.151.70
810.232.151.71/3210.232.151.71 – 10.232.151.7110.232.151.71
910.232.151.72/3210.232.151.72 – 10.232.151.7210.232.151.72
1010.232.151.73/3210.232.151.73 – 10.232.151.7310.232.151.73
1110.232.151.74/3210.232.151.74 – 10.232.151.7410.232.151.74
1210.232.151.75/3210.232.151.75 – 10.232.151.7510.232.151.75
1310.232.151.76/3210.232.151.76 – 10.232.151.7610.232.151.76
1410.232.151.77/3210.232.151.77 – 10.232.151.7710.232.151.77
1510.232.151.78/3210.232.151.78 – 10.232.151.7810.232.151.78
1610.232.151.79/3210.232.151.79 – 10.232.151.7910.232.151.79
1710.232.151.80/3210.232.151.80 – 10.232.151.8010.232.151.80
1810.232.151.81/3210.232.151.81 – 10.232.151.8110.232.151.81
1910.232.151.82/3210.232.151.82 – 10.232.151.8210.232.151.82
2010.232.151.83/3210.232.151.83 – 10.232.151.8310.232.151.83
2110.232.151.84/3210.232.151.84 – 10.232.151.8410.232.151.84
2210.232.151.85/3210.232.151.85 – 10.232.151.8510.232.151.85
2310.232.151.86/3210.232.151.86 – 10.232.151.8610.232.151.86
2410.232.151.87/3210.232.151.87 – 10.232.151.8710.232.151.87
2510.232.151.88/3210.232.151.88 – 10.232.151.8810.232.151.88
2610.232.151.89/3210.232.151.89 – 10.232.151.8910.232.151.89
2710.232.151.90/3210.232.151.90 – 10.232.151.9010.232.151.90
2810.232.151.91/3210.232.151.91 – 10.232.151.9110.232.151.91
2910.232.151.92/3210.232.151.92 – 10.232.151.9210.232.151.92
3010.232.151.93/3210.232.151.93 – 10.232.151.9310.232.151.93
3110.232.151.94/3210.232.151.94 – 10.232.151.9410.232.151.94
3210.232.151.95/3210.232.151.95 – 10.232.151.9510.232.151.95
3310.232.151.96/3210.232.151.96 – 10.232.151.9610.232.151.96
3410.232.151.97/3210.232.151.97 – 10.232.151.9710.232.151.97
3510.232.151.98/3210.232.151.98 – 10.232.151.9810.232.151.98
3610.232.151.99/3210.232.151.99 – 10.232.151.9910.232.151.99
3710.232.151.100/3210.232.151.100 – 10.232.151.10010.232.151.100
3810.232.151.101/3210.232.151.101 – 10.232.151.10110.232.151.101
3910.232.151.102/3210.232.151.102 – 10.232.151.10210.232.151.102
4010.232.151.103/3210.232.151.103 – 10.232.151.10310.232.151.103
4110.232.151.104/3210.232.151.104 – 10.232.151.10410.232.151.104
4210.232.151.105/3210.232.151.105 – 10.232.151.10510.232.151.105
4310.232.151.106/3210.232.151.106 – 10.232.151.10610.232.151.106
4410.232.151.107/3210.232.151.107 – 10.232.151.10710.232.151.107
4510.232.151.108/3210.232.151.108 – 10.232.151.10810.232.151.108
4610.232.151.109/3210.232.151.109 – 10.232.151.10910.232.151.109
4710.232.151.110/3210.232.151.110 – 10.232.151.11010.232.151.110
4810.232.151.111/3210.232.151.111 – 10.232.151.11110.232.151.111
4910.232.151.112/3210.232.151.112 – 10.232.151.11210.232.151.112
5010.232.151.113/3210.232.151.113 – 10.232.151.11310.232.151.113
5110.232.151.114/3210.232.151.114 – 10.232.151.11410.232.151.114
5210.232.151.115/3210.232.151.115 – 10.232.151.11510.232.151.115
5310.232.151.116/3210.232.151.116 – 10.232.151.11610.232.151.116
5410.232.151.117/3210.232.151.117 – 10.232.151.11710.232.151.117
5510.232.151.118/3210.232.151.118 – 10.232.151.11810.232.151.118
5610.232.151.119/3210.232.151.119 – 10.232.151.11910.232.151.119
5710.232.151.120/3210.232.151.120 – 10.232.151.12010.232.151.120
5810.232.151.121/3210.232.151.121 – 10.232.151.12110.232.151.121
5910.232.151.122/3210.232.151.122 – 10.232.151.12210.232.151.122
6010.232.151.123/3210.232.151.123 – 10.232.151.12310.232.151.123
6110.232.151.124/3210.232.151.124 – 10.232.151.12410.232.151.124
6210.232.151.125/3210.232.151.125 – 10.232.151.12510.232.151.125
6310.232.151.126/3210.232.151.126 – 10.232.151.12610.232.151.126
6410.232.151.127/3210.232.151.127 – 10.232.151.12710.232.151.127
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 →