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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)10.78.60.0/25
network10.78.60.0/25
broadcast10.78.60.127
first host10.78.60.1
last host10.78.60.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.60.0/25
address00001010.01001110.00111100.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.00111100.00000000
broadcast00001010.01001110.00111100.01111111
green = network part, grey = host part
hex0x0a4e3c00
decimal172899328
reverse dns0.60.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:3c00

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.60.0/3110.78.60.0 – 10.78.60.110.78.60.1
210.78.60.2/3110.78.60.2 – 10.78.60.310.78.60.3
310.78.60.4/3110.78.60.4 – 10.78.60.510.78.60.5
410.78.60.6/3110.78.60.6 – 10.78.60.710.78.60.7
510.78.60.8/3110.78.60.8 – 10.78.60.910.78.60.9
610.78.60.10/3110.78.60.10 – 10.78.60.1110.78.60.11
710.78.60.12/3110.78.60.12 – 10.78.60.1310.78.60.13
810.78.60.14/3110.78.60.14 – 10.78.60.1510.78.60.15
910.78.60.16/3110.78.60.16 – 10.78.60.1710.78.60.17
1010.78.60.18/3110.78.60.18 – 10.78.60.1910.78.60.19
1110.78.60.20/3110.78.60.20 – 10.78.60.2110.78.60.21
1210.78.60.22/3110.78.60.22 – 10.78.60.2310.78.60.23
1310.78.60.24/3110.78.60.24 – 10.78.60.2510.78.60.25
1410.78.60.26/3110.78.60.26 – 10.78.60.2710.78.60.27
1510.78.60.28/3110.78.60.28 – 10.78.60.2910.78.60.29
1610.78.60.30/3110.78.60.30 – 10.78.60.3110.78.60.31
1710.78.60.32/3110.78.60.32 – 10.78.60.3310.78.60.33
1810.78.60.34/3110.78.60.34 – 10.78.60.3510.78.60.35
1910.78.60.36/3110.78.60.36 – 10.78.60.3710.78.60.37
2010.78.60.38/3110.78.60.38 – 10.78.60.3910.78.60.39
2110.78.60.40/3110.78.60.40 – 10.78.60.4110.78.60.41
2210.78.60.42/3110.78.60.42 – 10.78.60.4310.78.60.43
2310.78.60.44/3110.78.60.44 – 10.78.60.4510.78.60.45
2410.78.60.46/3110.78.60.46 – 10.78.60.4710.78.60.47
2510.78.60.48/3110.78.60.48 – 10.78.60.4910.78.60.49
2610.78.60.50/3110.78.60.50 – 10.78.60.5110.78.60.51
2710.78.60.52/3110.78.60.52 – 10.78.60.5310.78.60.53
2810.78.60.54/3110.78.60.54 – 10.78.60.5510.78.60.55
2910.78.60.56/3110.78.60.56 – 10.78.60.5710.78.60.57
3010.78.60.58/3110.78.60.58 – 10.78.60.5910.78.60.59
3110.78.60.60/3110.78.60.60 – 10.78.60.6110.78.60.61
3210.78.60.62/3110.78.60.62 – 10.78.60.6310.78.60.63
3310.78.60.64/3110.78.60.64 – 10.78.60.6510.78.60.65
3410.78.60.66/3110.78.60.66 – 10.78.60.6710.78.60.67
3510.78.60.68/3110.78.60.68 – 10.78.60.6910.78.60.69
3610.78.60.70/3110.78.60.70 – 10.78.60.7110.78.60.71
3710.78.60.72/3110.78.60.72 – 10.78.60.7310.78.60.73
3810.78.60.74/3110.78.60.74 – 10.78.60.7510.78.60.75
3910.78.60.76/3110.78.60.76 – 10.78.60.7710.78.60.77
4010.78.60.78/3110.78.60.78 – 10.78.60.7910.78.60.79
4110.78.60.80/3110.78.60.80 – 10.78.60.8110.78.60.81
4210.78.60.82/3110.78.60.82 – 10.78.60.8310.78.60.83
4310.78.60.84/3110.78.60.84 – 10.78.60.8510.78.60.85
4410.78.60.86/3110.78.60.86 – 10.78.60.8710.78.60.87
4510.78.60.88/3110.78.60.88 – 10.78.60.8910.78.60.89
4610.78.60.90/3110.78.60.90 – 10.78.60.9110.78.60.91
4710.78.60.92/3110.78.60.92 – 10.78.60.9310.78.60.93
4810.78.60.94/3110.78.60.94 – 10.78.60.9510.78.60.95
4910.78.60.96/3110.78.60.96 – 10.78.60.9710.78.60.97
5010.78.60.98/3110.78.60.98 – 10.78.60.9910.78.60.99
5110.78.60.100/3110.78.60.100 – 10.78.60.10110.78.60.101
5210.78.60.102/3110.78.60.102 – 10.78.60.10310.78.60.103
5310.78.60.104/3110.78.60.104 – 10.78.60.10510.78.60.105
5410.78.60.106/3110.78.60.106 – 10.78.60.10710.78.60.107
5510.78.60.108/3110.78.60.108 – 10.78.60.10910.78.60.109
5610.78.60.110/3110.78.60.110 – 10.78.60.11110.78.60.111
5710.78.60.112/3110.78.60.112 – 10.78.60.11310.78.60.113
5810.78.60.114/3110.78.60.114 – 10.78.60.11510.78.60.115
5910.78.60.116/3110.78.60.116 – 10.78.60.11710.78.60.117
6010.78.60.118/3110.78.60.118 – 10.78.60.11910.78.60.119
6110.78.60.120/3110.78.60.120 – 10.78.60.12110.78.60.121
6210.78.60.122/3110.78.60.122 – 10.78.60.12310.78.60.123
6310.78.60.124/3110.78.60.124 – 10.78.60.12510.78.60.125
6410.78.60.126/3110.78.60.126 – 10.78.60.12710.78.60.127
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /25
/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-
/25255.255.255.1281281261
/26255.255.255.19264622 split →
/27255.255.255.22432304 split →
/28255.255.255.24016148 split →
/29255.255.255.2488616 split →
/30255.255.255.2524232 split →
/31255.255.255.2542264 split →
/32255.255.255.25511128 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 →