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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)10.2.119.0/25
network10.2.119.0/25
broadcast10.2.119.127
first host10.2.119.1
last host10.2.119.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.119.0/25
address00001010.00000010.01110111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.01110111.00000000
broadcast00001010.00000010.01110111.01111111
green = network part, grey = host part
hex0x0a027700
decimal167933696
reverse dns0.119.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:7700

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.119.0/3110.2.119.0 – 10.2.119.110.2.119.1
210.2.119.2/3110.2.119.2 – 10.2.119.310.2.119.3
310.2.119.4/3110.2.119.4 – 10.2.119.510.2.119.5
410.2.119.6/3110.2.119.6 – 10.2.119.710.2.119.7
510.2.119.8/3110.2.119.8 – 10.2.119.910.2.119.9
610.2.119.10/3110.2.119.10 – 10.2.119.1110.2.119.11
710.2.119.12/3110.2.119.12 – 10.2.119.1310.2.119.13
810.2.119.14/3110.2.119.14 – 10.2.119.1510.2.119.15
910.2.119.16/3110.2.119.16 – 10.2.119.1710.2.119.17
1010.2.119.18/3110.2.119.18 – 10.2.119.1910.2.119.19
1110.2.119.20/3110.2.119.20 – 10.2.119.2110.2.119.21
1210.2.119.22/3110.2.119.22 – 10.2.119.2310.2.119.23
1310.2.119.24/3110.2.119.24 – 10.2.119.2510.2.119.25
1410.2.119.26/3110.2.119.26 – 10.2.119.2710.2.119.27
1510.2.119.28/3110.2.119.28 – 10.2.119.2910.2.119.29
1610.2.119.30/3110.2.119.30 – 10.2.119.3110.2.119.31
1710.2.119.32/3110.2.119.32 – 10.2.119.3310.2.119.33
1810.2.119.34/3110.2.119.34 – 10.2.119.3510.2.119.35
1910.2.119.36/3110.2.119.36 – 10.2.119.3710.2.119.37
2010.2.119.38/3110.2.119.38 – 10.2.119.3910.2.119.39
2110.2.119.40/3110.2.119.40 – 10.2.119.4110.2.119.41
2210.2.119.42/3110.2.119.42 – 10.2.119.4310.2.119.43
2310.2.119.44/3110.2.119.44 – 10.2.119.4510.2.119.45
2410.2.119.46/3110.2.119.46 – 10.2.119.4710.2.119.47
2510.2.119.48/3110.2.119.48 – 10.2.119.4910.2.119.49
2610.2.119.50/3110.2.119.50 – 10.2.119.5110.2.119.51
2710.2.119.52/3110.2.119.52 – 10.2.119.5310.2.119.53
2810.2.119.54/3110.2.119.54 – 10.2.119.5510.2.119.55
2910.2.119.56/3110.2.119.56 – 10.2.119.5710.2.119.57
3010.2.119.58/3110.2.119.58 – 10.2.119.5910.2.119.59
3110.2.119.60/3110.2.119.60 – 10.2.119.6110.2.119.61
3210.2.119.62/3110.2.119.62 – 10.2.119.6310.2.119.63
3310.2.119.64/3110.2.119.64 – 10.2.119.6510.2.119.65
3410.2.119.66/3110.2.119.66 – 10.2.119.6710.2.119.67
3510.2.119.68/3110.2.119.68 – 10.2.119.6910.2.119.69
3610.2.119.70/3110.2.119.70 – 10.2.119.7110.2.119.71
3710.2.119.72/3110.2.119.72 – 10.2.119.7310.2.119.73
3810.2.119.74/3110.2.119.74 – 10.2.119.7510.2.119.75
3910.2.119.76/3110.2.119.76 – 10.2.119.7710.2.119.77
4010.2.119.78/3110.2.119.78 – 10.2.119.7910.2.119.79
4110.2.119.80/3110.2.119.80 – 10.2.119.8110.2.119.81
4210.2.119.82/3110.2.119.82 – 10.2.119.8310.2.119.83
4310.2.119.84/3110.2.119.84 – 10.2.119.8510.2.119.85
4410.2.119.86/3110.2.119.86 – 10.2.119.8710.2.119.87
4510.2.119.88/3110.2.119.88 – 10.2.119.8910.2.119.89
4610.2.119.90/3110.2.119.90 – 10.2.119.9110.2.119.91
4710.2.119.92/3110.2.119.92 – 10.2.119.9310.2.119.93
4810.2.119.94/3110.2.119.94 – 10.2.119.9510.2.119.95
4910.2.119.96/3110.2.119.96 – 10.2.119.9710.2.119.97
5010.2.119.98/3110.2.119.98 – 10.2.119.9910.2.119.99
5110.2.119.100/3110.2.119.100 – 10.2.119.10110.2.119.101
5210.2.119.102/3110.2.119.102 – 10.2.119.10310.2.119.103
5310.2.119.104/3110.2.119.104 – 10.2.119.10510.2.119.105
5410.2.119.106/3110.2.119.106 – 10.2.119.10710.2.119.107
5510.2.119.108/3110.2.119.108 – 10.2.119.10910.2.119.109
5610.2.119.110/3110.2.119.110 – 10.2.119.11110.2.119.111
5710.2.119.112/3110.2.119.112 – 10.2.119.11310.2.119.113
5810.2.119.114/3110.2.119.114 – 10.2.119.11510.2.119.115
5910.2.119.116/3110.2.119.116 – 10.2.119.11710.2.119.117
6010.2.119.118/3110.2.119.118 – 10.2.119.11910.2.119.119
6110.2.119.120/3110.2.119.120 – 10.2.119.12110.2.119.121
6210.2.119.122/3110.2.119.122 – 10.2.119.12310.2.119.123
6310.2.119.124/3110.2.119.124 – 10.2.119.12510.2.119.125
6410.2.119.126/3110.2.119.126 – 10.2.119.12710.2.119.127
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 →