ip
ipku.in

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)10.167.193.0/25
network10.167.193.0/25
broadcast10.167.193.127
first host10.167.193.1
last host10.167.193.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.193.0/25
address00001010.10100111.11000001.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.11000001.00000000
broadcast00001010.10100111.11000001.01111111
green = network part, grey = host part
hex0x0aa7c100
decimal178766080
reverse dns0.193.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:c100

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.193.0/3110.167.193.0 – 10.167.193.110.167.193.1
210.167.193.2/3110.167.193.2 – 10.167.193.310.167.193.3
310.167.193.4/3110.167.193.4 – 10.167.193.510.167.193.5
410.167.193.6/3110.167.193.6 – 10.167.193.710.167.193.7
510.167.193.8/3110.167.193.8 – 10.167.193.910.167.193.9
610.167.193.10/3110.167.193.10 – 10.167.193.1110.167.193.11
710.167.193.12/3110.167.193.12 – 10.167.193.1310.167.193.13
810.167.193.14/3110.167.193.14 – 10.167.193.1510.167.193.15
910.167.193.16/3110.167.193.16 – 10.167.193.1710.167.193.17
1010.167.193.18/3110.167.193.18 – 10.167.193.1910.167.193.19
1110.167.193.20/3110.167.193.20 – 10.167.193.2110.167.193.21
1210.167.193.22/3110.167.193.22 – 10.167.193.2310.167.193.23
1310.167.193.24/3110.167.193.24 – 10.167.193.2510.167.193.25
1410.167.193.26/3110.167.193.26 – 10.167.193.2710.167.193.27
1510.167.193.28/3110.167.193.28 – 10.167.193.2910.167.193.29
1610.167.193.30/3110.167.193.30 – 10.167.193.3110.167.193.31
1710.167.193.32/3110.167.193.32 – 10.167.193.3310.167.193.33
1810.167.193.34/3110.167.193.34 – 10.167.193.3510.167.193.35
1910.167.193.36/3110.167.193.36 – 10.167.193.3710.167.193.37
2010.167.193.38/3110.167.193.38 – 10.167.193.3910.167.193.39
2110.167.193.40/3110.167.193.40 – 10.167.193.4110.167.193.41
2210.167.193.42/3110.167.193.42 – 10.167.193.4310.167.193.43
2310.167.193.44/3110.167.193.44 – 10.167.193.4510.167.193.45
2410.167.193.46/3110.167.193.46 – 10.167.193.4710.167.193.47
2510.167.193.48/3110.167.193.48 – 10.167.193.4910.167.193.49
2610.167.193.50/3110.167.193.50 – 10.167.193.5110.167.193.51
2710.167.193.52/3110.167.193.52 – 10.167.193.5310.167.193.53
2810.167.193.54/3110.167.193.54 – 10.167.193.5510.167.193.55
2910.167.193.56/3110.167.193.56 – 10.167.193.5710.167.193.57
3010.167.193.58/3110.167.193.58 – 10.167.193.5910.167.193.59
3110.167.193.60/3110.167.193.60 – 10.167.193.6110.167.193.61
3210.167.193.62/3110.167.193.62 – 10.167.193.6310.167.193.63
3310.167.193.64/3110.167.193.64 – 10.167.193.6510.167.193.65
3410.167.193.66/3110.167.193.66 – 10.167.193.6710.167.193.67
3510.167.193.68/3110.167.193.68 – 10.167.193.6910.167.193.69
3610.167.193.70/3110.167.193.70 – 10.167.193.7110.167.193.71
3710.167.193.72/3110.167.193.72 – 10.167.193.7310.167.193.73
3810.167.193.74/3110.167.193.74 – 10.167.193.7510.167.193.75
3910.167.193.76/3110.167.193.76 – 10.167.193.7710.167.193.77
4010.167.193.78/3110.167.193.78 – 10.167.193.7910.167.193.79
4110.167.193.80/3110.167.193.80 – 10.167.193.8110.167.193.81
4210.167.193.82/3110.167.193.82 – 10.167.193.8310.167.193.83
4310.167.193.84/3110.167.193.84 – 10.167.193.8510.167.193.85
4410.167.193.86/3110.167.193.86 – 10.167.193.8710.167.193.87
4510.167.193.88/3110.167.193.88 – 10.167.193.8910.167.193.89
4610.167.193.90/3110.167.193.90 – 10.167.193.9110.167.193.91
4710.167.193.92/3110.167.193.92 – 10.167.193.9310.167.193.93
4810.167.193.94/3110.167.193.94 – 10.167.193.9510.167.193.95
4910.167.193.96/3110.167.193.96 – 10.167.193.9710.167.193.97
5010.167.193.98/3110.167.193.98 – 10.167.193.9910.167.193.99
5110.167.193.100/3110.167.193.100 – 10.167.193.10110.167.193.101
5210.167.193.102/3110.167.193.102 – 10.167.193.10310.167.193.103
5310.167.193.104/3110.167.193.104 – 10.167.193.10510.167.193.105
5410.167.193.106/3110.167.193.106 – 10.167.193.10710.167.193.107
5510.167.193.108/3110.167.193.108 – 10.167.193.10910.167.193.109
5610.167.193.110/3110.167.193.110 – 10.167.193.11110.167.193.111
5710.167.193.112/3110.167.193.112 – 10.167.193.11310.167.193.113
5810.167.193.114/3110.167.193.114 – 10.167.193.11510.167.193.115
5910.167.193.116/3110.167.193.116 – 10.167.193.11710.167.193.117
6010.167.193.118/3110.167.193.118 – 10.167.193.11910.167.193.119
6110.167.193.120/3110.167.193.120 – 10.167.193.12110.167.193.121
6210.167.193.122/3110.167.193.122 – 10.167.193.12310.167.193.123
6310.167.193.124/3110.167.193.124 – 10.167.193.12510.167.193.125
6410.167.193.126/3110.167.193.126 – 10.167.193.12710.167.193.127
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 →