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)10.7.231.0/25
network10.7.231.0/25
broadcast10.7.231.127
first host10.7.231.1
last host10.7.231.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.7.231.0/25
address00001010.00000111.11100111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000111.11100111.00000000
broadcast00001010.00000111.11100111.01111111
green = network part, grey = host part
hex0x0a07e700
decimal168290048
reverse dns0.231.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:e700

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.231.0/3210.7.231.0 – 10.7.231.010.7.231.0
210.7.231.1/3210.7.231.1 – 10.7.231.110.7.231.1
310.7.231.2/3210.7.231.2 – 10.7.231.210.7.231.2
410.7.231.3/3210.7.231.3 – 10.7.231.310.7.231.3
510.7.231.4/3210.7.231.4 – 10.7.231.410.7.231.4
610.7.231.5/3210.7.231.5 – 10.7.231.510.7.231.5
710.7.231.6/3210.7.231.6 – 10.7.231.610.7.231.6
810.7.231.7/3210.7.231.7 – 10.7.231.710.7.231.7
910.7.231.8/3210.7.231.8 – 10.7.231.810.7.231.8
1010.7.231.9/3210.7.231.9 – 10.7.231.910.7.231.9
1110.7.231.10/3210.7.231.10 – 10.7.231.1010.7.231.10
1210.7.231.11/3210.7.231.11 – 10.7.231.1110.7.231.11
1310.7.231.12/3210.7.231.12 – 10.7.231.1210.7.231.12
1410.7.231.13/3210.7.231.13 – 10.7.231.1310.7.231.13
1510.7.231.14/3210.7.231.14 – 10.7.231.1410.7.231.14
1610.7.231.15/3210.7.231.15 – 10.7.231.1510.7.231.15
1710.7.231.16/3210.7.231.16 – 10.7.231.1610.7.231.16
1810.7.231.17/3210.7.231.17 – 10.7.231.1710.7.231.17
1910.7.231.18/3210.7.231.18 – 10.7.231.1810.7.231.18
2010.7.231.19/3210.7.231.19 – 10.7.231.1910.7.231.19
2110.7.231.20/3210.7.231.20 – 10.7.231.2010.7.231.20
2210.7.231.21/3210.7.231.21 – 10.7.231.2110.7.231.21
2310.7.231.22/3210.7.231.22 – 10.7.231.2210.7.231.22
2410.7.231.23/3210.7.231.23 – 10.7.231.2310.7.231.23
2510.7.231.24/3210.7.231.24 – 10.7.231.2410.7.231.24
2610.7.231.25/3210.7.231.25 – 10.7.231.2510.7.231.25
2710.7.231.26/3210.7.231.26 – 10.7.231.2610.7.231.26
2810.7.231.27/3210.7.231.27 – 10.7.231.2710.7.231.27
2910.7.231.28/3210.7.231.28 – 10.7.231.2810.7.231.28
3010.7.231.29/3210.7.231.29 – 10.7.231.2910.7.231.29
3110.7.231.30/3210.7.231.30 – 10.7.231.3010.7.231.30
3210.7.231.31/3210.7.231.31 – 10.7.231.3110.7.231.31
3310.7.231.32/3210.7.231.32 – 10.7.231.3210.7.231.32
3410.7.231.33/3210.7.231.33 – 10.7.231.3310.7.231.33
3510.7.231.34/3210.7.231.34 – 10.7.231.3410.7.231.34
3610.7.231.35/3210.7.231.35 – 10.7.231.3510.7.231.35
3710.7.231.36/3210.7.231.36 – 10.7.231.3610.7.231.36
3810.7.231.37/3210.7.231.37 – 10.7.231.3710.7.231.37
3910.7.231.38/3210.7.231.38 – 10.7.231.3810.7.231.38
4010.7.231.39/3210.7.231.39 – 10.7.231.3910.7.231.39
4110.7.231.40/3210.7.231.40 – 10.7.231.4010.7.231.40
4210.7.231.41/3210.7.231.41 – 10.7.231.4110.7.231.41
4310.7.231.42/3210.7.231.42 – 10.7.231.4210.7.231.42
4410.7.231.43/3210.7.231.43 – 10.7.231.4310.7.231.43
4510.7.231.44/3210.7.231.44 – 10.7.231.4410.7.231.44
4610.7.231.45/3210.7.231.45 – 10.7.231.4510.7.231.45
4710.7.231.46/3210.7.231.46 – 10.7.231.4610.7.231.46
4810.7.231.47/3210.7.231.47 – 10.7.231.4710.7.231.47
4910.7.231.48/3210.7.231.48 – 10.7.231.4810.7.231.48
5010.7.231.49/3210.7.231.49 – 10.7.231.4910.7.231.49
5110.7.231.50/3210.7.231.50 – 10.7.231.5010.7.231.50
5210.7.231.51/3210.7.231.51 – 10.7.231.5110.7.231.51
5310.7.231.52/3210.7.231.52 – 10.7.231.5210.7.231.52
5410.7.231.53/3210.7.231.53 – 10.7.231.5310.7.231.53
5510.7.231.54/3210.7.231.54 – 10.7.231.5410.7.231.54
5610.7.231.55/3210.7.231.55 – 10.7.231.5510.7.231.55
5710.7.231.56/3210.7.231.56 – 10.7.231.5610.7.231.56
5810.7.231.57/3210.7.231.57 – 10.7.231.5710.7.231.57
5910.7.231.58/3210.7.231.58 – 10.7.231.5810.7.231.58
6010.7.231.59/3210.7.231.59 – 10.7.231.5910.7.231.59
6110.7.231.60/3210.7.231.60 – 10.7.231.6010.7.231.60
6210.7.231.61/3210.7.231.61 – 10.7.231.6110.7.231.61
6310.7.231.62/3210.7.231.62 – 10.7.231.6210.7.231.62
6410.7.231.63/3210.7.231.63 – 10.7.231.6310.7.231.63
6510.7.231.64/3210.7.231.64 – 10.7.231.6410.7.231.64
6610.7.231.65/3210.7.231.65 – 10.7.231.6510.7.231.65
6710.7.231.66/3210.7.231.66 – 10.7.231.6610.7.231.66
6810.7.231.67/3210.7.231.67 – 10.7.231.6710.7.231.67
6910.7.231.68/3210.7.231.68 – 10.7.231.6810.7.231.68
7010.7.231.69/3210.7.231.69 – 10.7.231.6910.7.231.69
7110.7.231.70/3210.7.231.70 – 10.7.231.7010.7.231.70
7210.7.231.71/3210.7.231.71 – 10.7.231.7110.7.231.71
7310.7.231.72/3210.7.231.72 – 10.7.231.7210.7.231.72
7410.7.231.73/3210.7.231.73 – 10.7.231.7310.7.231.73
7510.7.231.74/3210.7.231.74 – 10.7.231.7410.7.231.74
7610.7.231.75/3210.7.231.75 – 10.7.231.7510.7.231.75
7710.7.231.76/3210.7.231.76 – 10.7.231.7610.7.231.76
7810.7.231.77/3210.7.231.77 – 10.7.231.7710.7.231.77
7910.7.231.78/3210.7.231.78 – 10.7.231.7810.7.231.78
8010.7.231.79/3210.7.231.79 – 10.7.231.7910.7.231.79
8110.7.231.80/3210.7.231.80 – 10.7.231.8010.7.231.80
8210.7.231.81/3210.7.231.81 – 10.7.231.8110.7.231.81
8310.7.231.82/3210.7.231.82 – 10.7.231.8210.7.231.82
8410.7.231.83/3210.7.231.83 – 10.7.231.8310.7.231.83
8510.7.231.84/3210.7.231.84 – 10.7.231.8410.7.231.84
8610.7.231.85/3210.7.231.85 – 10.7.231.8510.7.231.85
8710.7.231.86/3210.7.231.86 – 10.7.231.8610.7.231.86
8810.7.231.87/3210.7.231.87 – 10.7.231.8710.7.231.87
8910.7.231.88/3210.7.231.88 – 10.7.231.8810.7.231.88
9010.7.231.89/3210.7.231.89 – 10.7.231.8910.7.231.89
9110.7.231.90/3210.7.231.90 – 10.7.231.9010.7.231.90
9210.7.231.91/3210.7.231.91 – 10.7.231.9110.7.231.91
9310.7.231.92/3210.7.231.92 – 10.7.231.9210.7.231.92
9410.7.231.93/3210.7.231.93 – 10.7.231.9310.7.231.93
9510.7.231.94/3210.7.231.94 – 10.7.231.9410.7.231.94
9610.7.231.95/3210.7.231.95 – 10.7.231.9510.7.231.95
9710.7.231.96/3210.7.231.96 – 10.7.231.9610.7.231.96
9810.7.231.97/3210.7.231.97 – 10.7.231.9710.7.231.97
9910.7.231.98/3210.7.231.98 – 10.7.231.9810.7.231.98
10010.7.231.99/3210.7.231.99 – 10.7.231.9910.7.231.99
10110.7.231.100/3210.7.231.100 – 10.7.231.10010.7.231.100
10210.7.231.101/3210.7.231.101 – 10.7.231.10110.7.231.101
10310.7.231.102/3210.7.231.102 – 10.7.231.10210.7.231.102
10410.7.231.103/3210.7.231.103 – 10.7.231.10310.7.231.103
10510.7.231.104/3210.7.231.104 – 10.7.231.10410.7.231.104
10610.7.231.105/3210.7.231.105 – 10.7.231.10510.7.231.105
10710.7.231.106/3210.7.231.106 – 10.7.231.10610.7.231.106
10810.7.231.107/3210.7.231.107 – 10.7.231.10710.7.231.107
10910.7.231.108/3210.7.231.108 – 10.7.231.10810.7.231.108
11010.7.231.109/3210.7.231.109 – 10.7.231.10910.7.231.109
11110.7.231.110/3210.7.231.110 – 10.7.231.11010.7.231.110
11210.7.231.111/3210.7.231.111 – 10.7.231.11110.7.231.111
11310.7.231.112/3210.7.231.112 – 10.7.231.11210.7.231.112
11410.7.231.113/3210.7.231.113 – 10.7.231.11310.7.231.113
11510.7.231.114/3210.7.231.114 – 10.7.231.11410.7.231.114
11610.7.231.115/3210.7.231.115 – 10.7.231.11510.7.231.115
11710.7.231.116/3210.7.231.116 – 10.7.231.11610.7.231.116
11810.7.231.117/3210.7.231.117 – 10.7.231.11710.7.231.117
11910.7.231.118/3210.7.231.118 – 10.7.231.11810.7.231.118
12010.7.231.119/3210.7.231.119 – 10.7.231.11910.7.231.119
12110.7.231.120/3210.7.231.120 – 10.7.231.12010.7.231.120
12210.7.231.121/3210.7.231.121 – 10.7.231.12110.7.231.121
12310.7.231.122/3210.7.231.122 – 10.7.231.12210.7.231.122
12410.7.231.123/3210.7.231.123 – 10.7.231.12310.7.231.123
12510.7.231.124/3210.7.231.124 – 10.7.231.12410.7.231.124
12610.7.231.125/3210.7.231.125 – 10.7.231.12510.7.231.125
12710.7.231.126/3210.7.231.126 – 10.7.231.12610.7.231.126
12810.7.231.127/3210.7.231.127 – 10.7.231.12710.7.231.127
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 →