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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)10.45.87.64/26
network10.45.87.64/26
broadcast10.45.87.127
first host10.45.87.65
last host10.45.87.126
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.45.87.64/26
address00001010.00101101.01010111.01000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00101101.01010111.01000000
broadcast00001010.00101101.01010111.01111111
green = network part, grey = host part
hex0x0a2d5740
decimal170743616
reverse dns64.87.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:5740

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.45.87.64/3210.45.87.64 – 10.45.87.6410.45.87.64
210.45.87.65/3210.45.87.65 – 10.45.87.6510.45.87.65
310.45.87.66/3210.45.87.66 – 10.45.87.6610.45.87.66
410.45.87.67/3210.45.87.67 – 10.45.87.6710.45.87.67
510.45.87.68/3210.45.87.68 – 10.45.87.6810.45.87.68
610.45.87.69/3210.45.87.69 – 10.45.87.6910.45.87.69
710.45.87.70/3210.45.87.70 – 10.45.87.7010.45.87.70
810.45.87.71/3210.45.87.71 – 10.45.87.7110.45.87.71
910.45.87.72/3210.45.87.72 – 10.45.87.7210.45.87.72
1010.45.87.73/3210.45.87.73 – 10.45.87.7310.45.87.73
1110.45.87.74/3210.45.87.74 – 10.45.87.7410.45.87.74
1210.45.87.75/3210.45.87.75 – 10.45.87.7510.45.87.75
1310.45.87.76/3210.45.87.76 – 10.45.87.7610.45.87.76
1410.45.87.77/3210.45.87.77 – 10.45.87.7710.45.87.77
1510.45.87.78/3210.45.87.78 – 10.45.87.7810.45.87.78
1610.45.87.79/3210.45.87.79 – 10.45.87.7910.45.87.79
1710.45.87.80/3210.45.87.80 – 10.45.87.8010.45.87.80
1810.45.87.81/3210.45.87.81 – 10.45.87.8110.45.87.81
1910.45.87.82/3210.45.87.82 – 10.45.87.8210.45.87.82
2010.45.87.83/3210.45.87.83 – 10.45.87.8310.45.87.83
2110.45.87.84/3210.45.87.84 – 10.45.87.8410.45.87.84
2210.45.87.85/3210.45.87.85 – 10.45.87.8510.45.87.85
2310.45.87.86/3210.45.87.86 – 10.45.87.8610.45.87.86
2410.45.87.87/3210.45.87.87 – 10.45.87.8710.45.87.87
2510.45.87.88/3210.45.87.88 – 10.45.87.8810.45.87.88
2610.45.87.89/3210.45.87.89 – 10.45.87.8910.45.87.89
2710.45.87.90/3210.45.87.90 – 10.45.87.9010.45.87.90
2810.45.87.91/3210.45.87.91 – 10.45.87.9110.45.87.91
2910.45.87.92/3210.45.87.92 – 10.45.87.9210.45.87.92
3010.45.87.93/3210.45.87.93 – 10.45.87.9310.45.87.93
3110.45.87.94/3210.45.87.94 – 10.45.87.9410.45.87.94
3210.45.87.95/3210.45.87.95 – 10.45.87.9510.45.87.95
3310.45.87.96/3210.45.87.96 – 10.45.87.9610.45.87.96
3410.45.87.97/3210.45.87.97 – 10.45.87.9710.45.87.97
3510.45.87.98/3210.45.87.98 – 10.45.87.9810.45.87.98
3610.45.87.99/3210.45.87.99 – 10.45.87.9910.45.87.99
3710.45.87.100/3210.45.87.100 – 10.45.87.10010.45.87.100
3810.45.87.101/3210.45.87.101 – 10.45.87.10110.45.87.101
3910.45.87.102/3210.45.87.102 – 10.45.87.10210.45.87.102
4010.45.87.103/3210.45.87.103 – 10.45.87.10310.45.87.103
4110.45.87.104/3210.45.87.104 – 10.45.87.10410.45.87.104
4210.45.87.105/3210.45.87.105 – 10.45.87.10510.45.87.105
4310.45.87.106/3210.45.87.106 – 10.45.87.10610.45.87.106
4410.45.87.107/3210.45.87.107 – 10.45.87.10710.45.87.107
4510.45.87.108/3210.45.87.108 – 10.45.87.10810.45.87.108
4610.45.87.109/3210.45.87.109 – 10.45.87.10910.45.87.109
4710.45.87.110/3210.45.87.110 – 10.45.87.11010.45.87.110
4810.45.87.111/3210.45.87.111 – 10.45.87.11110.45.87.111
4910.45.87.112/3210.45.87.112 – 10.45.87.11210.45.87.112
5010.45.87.113/3210.45.87.113 – 10.45.87.11310.45.87.113
5110.45.87.114/3210.45.87.114 – 10.45.87.11410.45.87.114
5210.45.87.115/3210.45.87.115 – 10.45.87.11510.45.87.115
5310.45.87.116/3210.45.87.116 – 10.45.87.11610.45.87.116
5410.45.87.117/3210.45.87.117 – 10.45.87.11710.45.87.117
5510.45.87.118/3210.45.87.118 – 10.45.87.11810.45.87.118
5610.45.87.119/3210.45.87.119 – 10.45.87.11910.45.87.119
5710.45.87.120/3210.45.87.120 – 10.45.87.12010.45.87.120
5810.45.87.121/3210.45.87.121 – 10.45.87.12110.45.87.121
5910.45.87.122/3210.45.87.122 – 10.45.87.12210.45.87.122
6010.45.87.123/3210.45.87.123 – 10.45.87.12310.45.87.123
6110.45.87.124/3210.45.87.124 – 10.45.87.12410.45.87.124
6210.45.87.125/3210.45.87.125 – 10.45.87.12510.45.87.125
6310.45.87.126/3210.45.87.126 – 10.45.87.12610.45.87.126
6410.45.87.127/3210.45.87.127 – 10.45.87.12710.45.87.127
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 →