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)10.167.56.0/25
network10.167.56.0/25
broadcast10.167.56.127
first host10.167.56.1
last host10.167.56.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.56.0/25
address00001010.10100111.00111000.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.00111000.00000000
broadcast00001010.10100111.00111000.01111111
green = network part, grey = host part
hex0x0aa73800
decimal178731008
reverse dns0.56.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:3800

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.56.0/3210.167.56.0 – 10.167.56.010.167.56.0
210.167.56.1/3210.167.56.1 – 10.167.56.110.167.56.1
310.167.56.2/3210.167.56.2 – 10.167.56.210.167.56.2
410.167.56.3/3210.167.56.3 – 10.167.56.310.167.56.3
510.167.56.4/3210.167.56.4 – 10.167.56.410.167.56.4
610.167.56.5/3210.167.56.5 – 10.167.56.510.167.56.5
710.167.56.6/3210.167.56.6 – 10.167.56.610.167.56.6
810.167.56.7/3210.167.56.7 – 10.167.56.710.167.56.7
910.167.56.8/3210.167.56.8 – 10.167.56.810.167.56.8
1010.167.56.9/3210.167.56.9 – 10.167.56.910.167.56.9
1110.167.56.10/3210.167.56.10 – 10.167.56.1010.167.56.10
1210.167.56.11/3210.167.56.11 – 10.167.56.1110.167.56.11
1310.167.56.12/3210.167.56.12 – 10.167.56.1210.167.56.12
1410.167.56.13/3210.167.56.13 – 10.167.56.1310.167.56.13
1510.167.56.14/3210.167.56.14 – 10.167.56.1410.167.56.14
1610.167.56.15/3210.167.56.15 – 10.167.56.1510.167.56.15
1710.167.56.16/3210.167.56.16 – 10.167.56.1610.167.56.16
1810.167.56.17/3210.167.56.17 – 10.167.56.1710.167.56.17
1910.167.56.18/3210.167.56.18 – 10.167.56.1810.167.56.18
2010.167.56.19/3210.167.56.19 – 10.167.56.1910.167.56.19
2110.167.56.20/3210.167.56.20 – 10.167.56.2010.167.56.20
2210.167.56.21/3210.167.56.21 – 10.167.56.2110.167.56.21
2310.167.56.22/3210.167.56.22 – 10.167.56.2210.167.56.22
2410.167.56.23/3210.167.56.23 – 10.167.56.2310.167.56.23
2510.167.56.24/3210.167.56.24 – 10.167.56.2410.167.56.24
2610.167.56.25/3210.167.56.25 – 10.167.56.2510.167.56.25
2710.167.56.26/3210.167.56.26 – 10.167.56.2610.167.56.26
2810.167.56.27/3210.167.56.27 – 10.167.56.2710.167.56.27
2910.167.56.28/3210.167.56.28 – 10.167.56.2810.167.56.28
3010.167.56.29/3210.167.56.29 – 10.167.56.2910.167.56.29
3110.167.56.30/3210.167.56.30 – 10.167.56.3010.167.56.30
3210.167.56.31/3210.167.56.31 – 10.167.56.3110.167.56.31
3310.167.56.32/3210.167.56.32 – 10.167.56.3210.167.56.32
3410.167.56.33/3210.167.56.33 – 10.167.56.3310.167.56.33
3510.167.56.34/3210.167.56.34 – 10.167.56.3410.167.56.34
3610.167.56.35/3210.167.56.35 – 10.167.56.3510.167.56.35
3710.167.56.36/3210.167.56.36 – 10.167.56.3610.167.56.36
3810.167.56.37/3210.167.56.37 – 10.167.56.3710.167.56.37
3910.167.56.38/3210.167.56.38 – 10.167.56.3810.167.56.38
4010.167.56.39/3210.167.56.39 – 10.167.56.3910.167.56.39
4110.167.56.40/3210.167.56.40 – 10.167.56.4010.167.56.40
4210.167.56.41/3210.167.56.41 – 10.167.56.4110.167.56.41
4310.167.56.42/3210.167.56.42 – 10.167.56.4210.167.56.42
4410.167.56.43/3210.167.56.43 – 10.167.56.4310.167.56.43
4510.167.56.44/3210.167.56.44 – 10.167.56.4410.167.56.44
4610.167.56.45/3210.167.56.45 – 10.167.56.4510.167.56.45
4710.167.56.46/3210.167.56.46 – 10.167.56.4610.167.56.46
4810.167.56.47/3210.167.56.47 – 10.167.56.4710.167.56.47
4910.167.56.48/3210.167.56.48 – 10.167.56.4810.167.56.48
5010.167.56.49/3210.167.56.49 – 10.167.56.4910.167.56.49
5110.167.56.50/3210.167.56.50 – 10.167.56.5010.167.56.50
5210.167.56.51/3210.167.56.51 – 10.167.56.5110.167.56.51
5310.167.56.52/3210.167.56.52 – 10.167.56.5210.167.56.52
5410.167.56.53/3210.167.56.53 – 10.167.56.5310.167.56.53
5510.167.56.54/3210.167.56.54 – 10.167.56.5410.167.56.54
5610.167.56.55/3210.167.56.55 – 10.167.56.5510.167.56.55
5710.167.56.56/3210.167.56.56 – 10.167.56.5610.167.56.56
5810.167.56.57/3210.167.56.57 – 10.167.56.5710.167.56.57
5910.167.56.58/3210.167.56.58 – 10.167.56.5810.167.56.58
6010.167.56.59/3210.167.56.59 – 10.167.56.5910.167.56.59
6110.167.56.60/3210.167.56.60 – 10.167.56.6010.167.56.60
6210.167.56.61/3210.167.56.61 – 10.167.56.6110.167.56.61
6310.167.56.62/3210.167.56.62 – 10.167.56.6210.167.56.62
6410.167.56.63/3210.167.56.63 – 10.167.56.6310.167.56.63
6510.167.56.64/3210.167.56.64 – 10.167.56.6410.167.56.64
6610.167.56.65/3210.167.56.65 – 10.167.56.6510.167.56.65
6710.167.56.66/3210.167.56.66 – 10.167.56.6610.167.56.66
6810.167.56.67/3210.167.56.67 – 10.167.56.6710.167.56.67
6910.167.56.68/3210.167.56.68 – 10.167.56.6810.167.56.68
7010.167.56.69/3210.167.56.69 – 10.167.56.6910.167.56.69
7110.167.56.70/3210.167.56.70 – 10.167.56.7010.167.56.70
7210.167.56.71/3210.167.56.71 – 10.167.56.7110.167.56.71
7310.167.56.72/3210.167.56.72 – 10.167.56.7210.167.56.72
7410.167.56.73/3210.167.56.73 – 10.167.56.7310.167.56.73
7510.167.56.74/3210.167.56.74 – 10.167.56.7410.167.56.74
7610.167.56.75/3210.167.56.75 – 10.167.56.7510.167.56.75
7710.167.56.76/3210.167.56.76 – 10.167.56.7610.167.56.76
7810.167.56.77/3210.167.56.77 – 10.167.56.7710.167.56.77
7910.167.56.78/3210.167.56.78 – 10.167.56.7810.167.56.78
8010.167.56.79/3210.167.56.79 – 10.167.56.7910.167.56.79
8110.167.56.80/3210.167.56.80 – 10.167.56.8010.167.56.80
8210.167.56.81/3210.167.56.81 – 10.167.56.8110.167.56.81
8310.167.56.82/3210.167.56.82 – 10.167.56.8210.167.56.82
8410.167.56.83/3210.167.56.83 – 10.167.56.8310.167.56.83
8510.167.56.84/3210.167.56.84 – 10.167.56.8410.167.56.84
8610.167.56.85/3210.167.56.85 – 10.167.56.8510.167.56.85
8710.167.56.86/3210.167.56.86 – 10.167.56.8610.167.56.86
8810.167.56.87/3210.167.56.87 – 10.167.56.8710.167.56.87
8910.167.56.88/3210.167.56.88 – 10.167.56.8810.167.56.88
9010.167.56.89/3210.167.56.89 – 10.167.56.8910.167.56.89
9110.167.56.90/3210.167.56.90 – 10.167.56.9010.167.56.90
9210.167.56.91/3210.167.56.91 – 10.167.56.9110.167.56.91
9310.167.56.92/3210.167.56.92 – 10.167.56.9210.167.56.92
9410.167.56.93/3210.167.56.93 – 10.167.56.9310.167.56.93
9510.167.56.94/3210.167.56.94 – 10.167.56.9410.167.56.94
9610.167.56.95/3210.167.56.95 – 10.167.56.9510.167.56.95
9710.167.56.96/3210.167.56.96 – 10.167.56.9610.167.56.96
9810.167.56.97/3210.167.56.97 – 10.167.56.9710.167.56.97
9910.167.56.98/3210.167.56.98 – 10.167.56.9810.167.56.98
10010.167.56.99/3210.167.56.99 – 10.167.56.9910.167.56.99
10110.167.56.100/3210.167.56.100 – 10.167.56.10010.167.56.100
10210.167.56.101/3210.167.56.101 – 10.167.56.10110.167.56.101
10310.167.56.102/3210.167.56.102 – 10.167.56.10210.167.56.102
10410.167.56.103/3210.167.56.103 – 10.167.56.10310.167.56.103
10510.167.56.104/3210.167.56.104 – 10.167.56.10410.167.56.104
10610.167.56.105/3210.167.56.105 – 10.167.56.10510.167.56.105
10710.167.56.106/3210.167.56.106 – 10.167.56.10610.167.56.106
10810.167.56.107/3210.167.56.107 – 10.167.56.10710.167.56.107
10910.167.56.108/3210.167.56.108 – 10.167.56.10810.167.56.108
11010.167.56.109/3210.167.56.109 – 10.167.56.10910.167.56.109
11110.167.56.110/3210.167.56.110 – 10.167.56.11010.167.56.110
11210.167.56.111/3210.167.56.111 – 10.167.56.11110.167.56.111
11310.167.56.112/3210.167.56.112 – 10.167.56.11210.167.56.112
11410.167.56.113/3210.167.56.113 – 10.167.56.11310.167.56.113
11510.167.56.114/3210.167.56.114 – 10.167.56.11410.167.56.114
11610.167.56.115/3210.167.56.115 – 10.167.56.11510.167.56.115
11710.167.56.116/3210.167.56.116 – 10.167.56.11610.167.56.116
11810.167.56.117/3210.167.56.117 – 10.167.56.11710.167.56.117
11910.167.56.118/3210.167.56.118 – 10.167.56.11810.167.56.118
12010.167.56.119/3210.167.56.119 – 10.167.56.11910.167.56.119
12110.167.56.120/3210.167.56.120 – 10.167.56.12010.167.56.120
12210.167.56.121/3210.167.56.121 – 10.167.56.12110.167.56.121
12310.167.56.122/3210.167.56.122 – 10.167.56.12210.167.56.122
12410.167.56.123/3210.167.56.123 – 10.167.56.12310.167.56.123
12510.167.56.124/3210.167.56.124 – 10.167.56.12410.167.56.124
12610.167.56.125/3210.167.56.125 – 10.167.56.12510.167.56.125
12710.167.56.126/3210.167.56.126 – 10.167.56.12610.167.56.126
12810.167.56.127/3210.167.56.127 – 10.167.56.12710.167.56.127
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 →