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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)10.167.182.0/25
network10.167.182.0/25
broadcast10.167.182.127
first host10.167.182.1
last host10.167.182.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.182.0/25
address00001010.10100111.10110110.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.10110110.00000000
broadcast00001010.10100111.10110110.01111111
green = network part, grey = host part
hex0x0aa7b600
decimal178763264
reverse dns0.182.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:b600

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.182.0/3110.167.182.0 – 10.167.182.110.167.182.1
210.167.182.2/3110.167.182.2 – 10.167.182.310.167.182.3
310.167.182.4/3110.167.182.4 – 10.167.182.510.167.182.5
410.167.182.6/3110.167.182.6 – 10.167.182.710.167.182.7
510.167.182.8/3110.167.182.8 – 10.167.182.910.167.182.9
610.167.182.10/3110.167.182.10 – 10.167.182.1110.167.182.11
710.167.182.12/3110.167.182.12 – 10.167.182.1310.167.182.13
810.167.182.14/3110.167.182.14 – 10.167.182.1510.167.182.15
910.167.182.16/3110.167.182.16 – 10.167.182.1710.167.182.17
1010.167.182.18/3110.167.182.18 – 10.167.182.1910.167.182.19
1110.167.182.20/3110.167.182.20 – 10.167.182.2110.167.182.21
1210.167.182.22/3110.167.182.22 – 10.167.182.2310.167.182.23
1310.167.182.24/3110.167.182.24 – 10.167.182.2510.167.182.25
1410.167.182.26/3110.167.182.26 – 10.167.182.2710.167.182.27
1510.167.182.28/3110.167.182.28 – 10.167.182.2910.167.182.29
1610.167.182.30/3110.167.182.30 – 10.167.182.3110.167.182.31
1710.167.182.32/3110.167.182.32 – 10.167.182.3310.167.182.33
1810.167.182.34/3110.167.182.34 – 10.167.182.3510.167.182.35
1910.167.182.36/3110.167.182.36 – 10.167.182.3710.167.182.37
2010.167.182.38/3110.167.182.38 – 10.167.182.3910.167.182.39
2110.167.182.40/3110.167.182.40 – 10.167.182.4110.167.182.41
2210.167.182.42/3110.167.182.42 – 10.167.182.4310.167.182.43
2310.167.182.44/3110.167.182.44 – 10.167.182.4510.167.182.45
2410.167.182.46/3110.167.182.46 – 10.167.182.4710.167.182.47
2510.167.182.48/3110.167.182.48 – 10.167.182.4910.167.182.49
2610.167.182.50/3110.167.182.50 – 10.167.182.5110.167.182.51
2710.167.182.52/3110.167.182.52 – 10.167.182.5310.167.182.53
2810.167.182.54/3110.167.182.54 – 10.167.182.5510.167.182.55
2910.167.182.56/3110.167.182.56 – 10.167.182.5710.167.182.57
3010.167.182.58/3110.167.182.58 – 10.167.182.5910.167.182.59
3110.167.182.60/3110.167.182.60 – 10.167.182.6110.167.182.61
3210.167.182.62/3110.167.182.62 – 10.167.182.6310.167.182.63
3310.167.182.64/3110.167.182.64 – 10.167.182.6510.167.182.65
3410.167.182.66/3110.167.182.66 – 10.167.182.6710.167.182.67
3510.167.182.68/3110.167.182.68 – 10.167.182.6910.167.182.69
3610.167.182.70/3110.167.182.70 – 10.167.182.7110.167.182.71
3710.167.182.72/3110.167.182.72 – 10.167.182.7310.167.182.73
3810.167.182.74/3110.167.182.74 – 10.167.182.7510.167.182.75
3910.167.182.76/3110.167.182.76 – 10.167.182.7710.167.182.77
4010.167.182.78/3110.167.182.78 – 10.167.182.7910.167.182.79
4110.167.182.80/3110.167.182.80 – 10.167.182.8110.167.182.81
4210.167.182.82/3110.167.182.82 – 10.167.182.8310.167.182.83
4310.167.182.84/3110.167.182.84 – 10.167.182.8510.167.182.85
4410.167.182.86/3110.167.182.86 – 10.167.182.8710.167.182.87
4510.167.182.88/3110.167.182.88 – 10.167.182.8910.167.182.89
4610.167.182.90/3110.167.182.90 – 10.167.182.9110.167.182.91
4710.167.182.92/3110.167.182.92 – 10.167.182.9310.167.182.93
4810.167.182.94/3110.167.182.94 – 10.167.182.9510.167.182.95
4910.167.182.96/3110.167.182.96 – 10.167.182.9710.167.182.97
5010.167.182.98/3110.167.182.98 – 10.167.182.9910.167.182.99
5110.167.182.100/3110.167.182.100 – 10.167.182.10110.167.182.101
5210.167.182.102/3110.167.182.102 – 10.167.182.10310.167.182.103
5310.167.182.104/3110.167.182.104 – 10.167.182.10510.167.182.105
5410.167.182.106/3110.167.182.106 – 10.167.182.10710.167.182.107
5510.167.182.108/3110.167.182.108 – 10.167.182.10910.167.182.109
5610.167.182.110/3110.167.182.110 – 10.167.182.11110.167.182.111
5710.167.182.112/3110.167.182.112 – 10.167.182.11310.167.182.113
5810.167.182.114/3110.167.182.114 – 10.167.182.11510.167.182.115
5910.167.182.116/3110.167.182.116 – 10.167.182.11710.167.182.117
6010.167.182.118/3110.167.182.118 – 10.167.182.11910.167.182.119
6110.167.182.120/3110.167.182.120 – 10.167.182.12110.167.182.121
6210.167.182.122/3110.167.182.122 – 10.167.182.12310.167.182.123
6310.167.182.124/3110.167.182.124 – 10.167.182.12510.167.182.125
6410.167.182.126/3110.167.182.126 – 10.167.182.12710.167.182.127
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 →