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)10.167.72.0/25
network10.167.72.0/25
broadcast10.167.72.127
first host10.167.72.1
last host10.167.72.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.72.0/25
address00001010.10100111.01001000.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.01001000.00000000
broadcast00001010.10100111.01001000.01111111
green = network part, grey = host part
hex0x0aa74800
decimal178735104
reverse dns0.72.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:4800

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.72.0/3210.167.72.0 – 10.167.72.010.167.72.0
210.167.72.1/3210.167.72.1 – 10.167.72.110.167.72.1
310.167.72.2/3210.167.72.2 – 10.167.72.210.167.72.2
410.167.72.3/3210.167.72.3 – 10.167.72.310.167.72.3
510.167.72.4/3210.167.72.4 – 10.167.72.410.167.72.4
610.167.72.5/3210.167.72.5 – 10.167.72.510.167.72.5
710.167.72.6/3210.167.72.6 – 10.167.72.610.167.72.6
810.167.72.7/3210.167.72.7 – 10.167.72.710.167.72.7
910.167.72.8/3210.167.72.8 – 10.167.72.810.167.72.8
1010.167.72.9/3210.167.72.9 – 10.167.72.910.167.72.9
1110.167.72.10/3210.167.72.10 – 10.167.72.1010.167.72.10
1210.167.72.11/3210.167.72.11 – 10.167.72.1110.167.72.11
1310.167.72.12/3210.167.72.12 – 10.167.72.1210.167.72.12
1410.167.72.13/3210.167.72.13 – 10.167.72.1310.167.72.13
1510.167.72.14/3210.167.72.14 – 10.167.72.1410.167.72.14
1610.167.72.15/3210.167.72.15 – 10.167.72.1510.167.72.15
1710.167.72.16/3210.167.72.16 – 10.167.72.1610.167.72.16
1810.167.72.17/3210.167.72.17 – 10.167.72.1710.167.72.17
1910.167.72.18/3210.167.72.18 – 10.167.72.1810.167.72.18
2010.167.72.19/3210.167.72.19 – 10.167.72.1910.167.72.19
2110.167.72.20/3210.167.72.20 – 10.167.72.2010.167.72.20
2210.167.72.21/3210.167.72.21 – 10.167.72.2110.167.72.21
2310.167.72.22/3210.167.72.22 – 10.167.72.2210.167.72.22
2410.167.72.23/3210.167.72.23 – 10.167.72.2310.167.72.23
2510.167.72.24/3210.167.72.24 – 10.167.72.2410.167.72.24
2610.167.72.25/3210.167.72.25 – 10.167.72.2510.167.72.25
2710.167.72.26/3210.167.72.26 – 10.167.72.2610.167.72.26
2810.167.72.27/3210.167.72.27 – 10.167.72.2710.167.72.27
2910.167.72.28/3210.167.72.28 – 10.167.72.2810.167.72.28
3010.167.72.29/3210.167.72.29 – 10.167.72.2910.167.72.29
3110.167.72.30/3210.167.72.30 – 10.167.72.3010.167.72.30
3210.167.72.31/3210.167.72.31 – 10.167.72.3110.167.72.31
3310.167.72.32/3210.167.72.32 – 10.167.72.3210.167.72.32
3410.167.72.33/3210.167.72.33 – 10.167.72.3310.167.72.33
3510.167.72.34/3210.167.72.34 – 10.167.72.3410.167.72.34
3610.167.72.35/3210.167.72.35 – 10.167.72.3510.167.72.35
3710.167.72.36/3210.167.72.36 – 10.167.72.3610.167.72.36
3810.167.72.37/3210.167.72.37 – 10.167.72.3710.167.72.37
3910.167.72.38/3210.167.72.38 – 10.167.72.3810.167.72.38
4010.167.72.39/3210.167.72.39 – 10.167.72.3910.167.72.39
4110.167.72.40/3210.167.72.40 – 10.167.72.4010.167.72.40
4210.167.72.41/3210.167.72.41 – 10.167.72.4110.167.72.41
4310.167.72.42/3210.167.72.42 – 10.167.72.4210.167.72.42
4410.167.72.43/3210.167.72.43 – 10.167.72.4310.167.72.43
4510.167.72.44/3210.167.72.44 – 10.167.72.4410.167.72.44
4610.167.72.45/3210.167.72.45 – 10.167.72.4510.167.72.45
4710.167.72.46/3210.167.72.46 – 10.167.72.4610.167.72.46
4810.167.72.47/3210.167.72.47 – 10.167.72.4710.167.72.47
4910.167.72.48/3210.167.72.48 – 10.167.72.4810.167.72.48
5010.167.72.49/3210.167.72.49 – 10.167.72.4910.167.72.49
5110.167.72.50/3210.167.72.50 – 10.167.72.5010.167.72.50
5210.167.72.51/3210.167.72.51 – 10.167.72.5110.167.72.51
5310.167.72.52/3210.167.72.52 – 10.167.72.5210.167.72.52
5410.167.72.53/3210.167.72.53 – 10.167.72.5310.167.72.53
5510.167.72.54/3210.167.72.54 – 10.167.72.5410.167.72.54
5610.167.72.55/3210.167.72.55 – 10.167.72.5510.167.72.55
5710.167.72.56/3210.167.72.56 – 10.167.72.5610.167.72.56
5810.167.72.57/3210.167.72.57 – 10.167.72.5710.167.72.57
5910.167.72.58/3210.167.72.58 – 10.167.72.5810.167.72.58
6010.167.72.59/3210.167.72.59 – 10.167.72.5910.167.72.59
6110.167.72.60/3210.167.72.60 – 10.167.72.6010.167.72.60
6210.167.72.61/3210.167.72.61 – 10.167.72.6110.167.72.61
6310.167.72.62/3210.167.72.62 – 10.167.72.6210.167.72.62
6410.167.72.63/3210.167.72.63 – 10.167.72.6310.167.72.63
6510.167.72.64/3210.167.72.64 – 10.167.72.6410.167.72.64
6610.167.72.65/3210.167.72.65 – 10.167.72.6510.167.72.65
6710.167.72.66/3210.167.72.66 – 10.167.72.6610.167.72.66
6810.167.72.67/3210.167.72.67 – 10.167.72.6710.167.72.67
6910.167.72.68/3210.167.72.68 – 10.167.72.6810.167.72.68
7010.167.72.69/3210.167.72.69 – 10.167.72.6910.167.72.69
7110.167.72.70/3210.167.72.70 – 10.167.72.7010.167.72.70
7210.167.72.71/3210.167.72.71 – 10.167.72.7110.167.72.71
7310.167.72.72/3210.167.72.72 – 10.167.72.7210.167.72.72
7410.167.72.73/3210.167.72.73 – 10.167.72.7310.167.72.73
7510.167.72.74/3210.167.72.74 – 10.167.72.7410.167.72.74
7610.167.72.75/3210.167.72.75 – 10.167.72.7510.167.72.75
7710.167.72.76/3210.167.72.76 – 10.167.72.7610.167.72.76
7810.167.72.77/3210.167.72.77 – 10.167.72.7710.167.72.77
7910.167.72.78/3210.167.72.78 – 10.167.72.7810.167.72.78
8010.167.72.79/3210.167.72.79 – 10.167.72.7910.167.72.79
8110.167.72.80/3210.167.72.80 – 10.167.72.8010.167.72.80
8210.167.72.81/3210.167.72.81 – 10.167.72.8110.167.72.81
8310.167.72.82/3210.167.72.82 – 10.167.72.8210.167.72.82
8410.167.72.83/3210.167.72.83 – 10.167.72.8310.167.72.83
8510.167.72.84/3210.167.72.84 – 10.167.72.8410.167.72.84
8610.167.72.85/3210.167.72.85 – 10.167.72.8510.167.72.85
8710.167.72.86/3210.167.72.86 – 10.167.72.8610.167.72.86
8810.167.72.87/3210.167.72.87 – 10.167.72.8710.167.72.87
8910.167.72.88/3210.167.72.88 – 10.167.72.8810.167.72.88
9010.167.72.89/3210.167.72.89 – 10.167.72.8910.167.72.89
9110.167.72.90/3210.167.72.90 – 10.167.72.9010.167.72.90
9210.167.72.91/3210.167.72.91 – 10.167.72.9110.167.72.91
9310.167.72.92/3210.167.72.92 – 10.167.72.9210.167.72.92
9410.167.72.93/3210.167.72.93 – 10.167.72.9310.167.72.93
9510.167.72.94/3210.167.72.94 – 10.167.72.9410.167.72.94
9610.167.72.95/3210.167.72.95 – 10.167.72.9510.167.72.95
9710.167.72.96/3210.167.72.96 – 10.167.72.9610.167.72.96
9810.167.72.97/3210.167.72.97 – 10.167.72.9710.167.72.97
9910.167.72.98/3210.167.72.98 – 10.167.72.9810.167.72.98
10010.167.72.99/3210.167.72.99 – 10.167.72.9910.167.72.99
10110.167.72.100/3210.167.72.100 – 10.167.72.10010.167.72.100
10210.167.72.101/3210.167.72.101 – 10.167.72.10110.167.72.101
10310.167.72.102/3210.167.72.102 – 10.167.72.10210.167.72.102
10410.167.72.103/3210.167.72.103 – 10.167.72.10310.167.72.103
10510.167.72.104/3210.167.72.104 – 10.167.72.10410.167.72.104
10610.167.72.105/3210.167.72.105 – 10.167.72.10510.167.72.105
10710.167.72.106/3210.167.72.106 – 10.167.72.10610.167.72.106
10810.167.72.107/3210.167.72.107 – 10.167.72.10710.167.72.107
10910.167.72.108/3210.167.72.108 – 10.167.72.10810.167.72.108
11010.167.72.109/3210.167.72.109 – 10.167.72.10910.167.72.109
11110.167.72.110/3210.167.72.110 – 10.167.72.11010.167.72.110
11210.167.72.111/3210.167.72.111 – 10.167.72.11110.167.72.111
11310.167.72.112/3210.167.72.112 – 10.167.72.11210.167.72.112
11410.167.72.113/3210.167.72.113 – 10.167.72.11310.167.72.113
11510.167.72.114/3210.167.72.114 – 10.167.72.11410.167.72.114
11610.167.72.115/3210.167.72.115 – 10.167.72.11510.167.72.115
11710.167.72.116/3210.167.72.116 – 10.167.72.11610.167.72.116
11810.167.72.117/3210.167.72.117 – 10.167.72.11710.167.72.117
11910.167.72.118/3210.167.72.118 – 10.167.72.11810.167.72.118
12010.167.72.119/3210.167.72.119 – 10.167.72.11910.167.72.119
12110.167.72.120/3210.167.72.120 – 10.167.72.12010.167.72.120
12210.167.72.121/3210.167.72.121 – 10.167.72.12110.167.72.121
12310.167.72.122/3210.167.72.122 – 10.167.72.12210.167.72.122
12410.167.72.123/3210.167.72.123 – 10.167.72.12310.167.72.123
12510.167.72.124/3210.167.72.124 – 10.167.72.12410.167.72.124
12610.167.72.125/3210.167.72.125 – 10.167.72.12510.167.72.125
12710.167.72.126/3210.167.72.126 – 10.167.72.12610.167.72.126
12810.167.72.127/3210.167.72.127 – 10.167.72.12710.167.72.127
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 →