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)10.7.9.0/25
network10.7.9.0/25
broadcast10.7.9.127
first host10.7.9.1
last host10.7.9.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.7.9.0/25
address00001010.00000111.00001001.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000111.00001001.00000000
broadcast00001010.00000111.00001001.01111111
green = network part, grey = host part
hex0x0a070900
decimal168233216
reverse dns0.9.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:900

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.9.0/3210.7.9.0 – 10.7.9.010.7.9.0
210.7.9.1/3210.7.9.1 – 10.7.9.110.7.9.1
310.7.9.2/3210.7.9.2 – 10.7.9.210.7.9.2
410.7.9.3/3210.7.9.3 – 10.7.9.310.7.9.3
510.7.9.4/3210.7.9.4 – 10.7.9.410.7.9.4
610.7.9.5/3210.7.9.5 – 10.7.9.510.7.9.5
710.7.9.6/3210.7.9.6 – 10.7.9.610.7.9.6
810.7.9.7/3210.7.9.7 – 10.7.9.710.7.9.7
910.7.9.8/3210.7.9.8 – 10.7.9.810.7.9.8
1010.7.9.9/3210.7.9.9 – 10.7.9.910.7.9.9
1110.7.9.10/3210.7.9.10 – 10.7.9.1010.7.9.10
1210.7.9.11/3210.7.9.11 – 10.7.9.1110.7.9.11
1310.7.9.12/3210.7.9.12 – 10.7.9.1210.7.9.12
1410.7.9.13/3210.7.9.13 – 10.7.9.1310.7.9.13
1510.7.9.14/3210.7.9.14 – 10.7.9.1410.7.9.14
1610.7.9.15/3210.7.9.15 – 10.7.9.1510.7.9.15
1710.7.9.16/3210.7.9.16 – 10.7.9.1610.7.9.16
1810.7.9.17/3210.7.9.17 – 10.7.9.1710.7.9.17
1910.7.9.18/3210.7.9.18 – 10.7.9.1810.7.9.18
2010.7.9.19/3210.7.9.19 – 10.7.9.1910.7.9.19
2110.7.9.20/3210.7.9.20 – 10.7.9.2010.7.9.20
2210.7.9.21/3210.7.9.21 – 10.7.9.2110.7.9.21
2310.7.9.22/3210.7.9.22 – 10.7.9.2210.7.9.22
2410.7.9.23/3210.7.9.23 – 10.7.9.2310.7.9.23
2510.7.9.24/3210.7.9.24 – 10.7.9.2410.7.9.24
2610.7.9.25/3210.7.9.25 – 10.7.9.2510.7.9.25
2710.7.9.26/3210.7.9.26 – 10.7.9.2610.7.9.26
2810.7.9.27/3210.7.9.27 – 10.7.9.2710.7.9.27
2910.7.9.28/3210.7.9.28 – 10.7.9.2810.7.9.28
3010.7.9.29/3210.7.9.29 – 10.7.9.2910.7.9.29
3110.7.9.30/3210.7.9.30 – 10.7.9.3010.7.9.30
3210.7.9.31/3210.7.9.31 – 10.7.9.3110.7.9.31
3310.7.9.32/3210.7.9.32 – 10.7.9.3210.7.9.32
3410.7.9.33/3210.7.9.33 – 10.7.9.3310.7.9.33
3510.7.9.34/3210.7.9.34 – 10.7.9.3410.7.9.34
3610.7.9.35/3210.7.9.35 – 10.7.9.3510.7.9.35
3710.7.9.36/3210.7.9.36 – 10.7.9.3610.7.9.36
3810.7.9.37/3210.7.9.37 – 10.7.9.3710.7.9.37
3910.7.9.38/3210.7.9.38 – 10.7.9.3810.7.9.38
4010.7.9.39/3210.7.9.39 – 10.7.9.3910.7.9.39
4110.7.9.40/3210.7.9.40 – 10.7.9.4010.7.9.40
4210.7.9.41/3210.7.9.41 – 10.7.9.4110.7.9.41
4310.7.9.42/3210.7.9.42 – 10.7.9.4210.7.9.42
4410.7.9.43/3210.7.9.43 – 10.7.9.4310.7.9.43
4510.7.9.44/3210.7.9.44 – 10.7.9.4410.7.9.44
4610.7.9.45/3210.7.9.45 – 10.7.9.4510.7.9.45
4710.7.9.46/3210.7.9.46 – 10.7.9.4610.7.9.46
4810.7.9.47/3210.7.9.47 – 10.7.9.4710.7.9.47
4910.7.9.48/3210.7.9.48 – 10.7.9.4810.7.9.48
5010.7.9.49/3210.7.9.49 – 10.7.9.4910.7.9.49
5110.7.9.50/3210.7.9.50 – 10.7.9.5010.7.9.50
5210.7.9.51/3210.7.9.51 – 10.7.9.5110.7.9.51
5310.7.9.52/3210.7.9.52 – 10.7.9.5210.7.9.52
5410.7.9.53/3210.7.9.53 – 10.7.9.5310.7.9.53
5510.7.9.54/3210.7.9.54 – 10.7.9.5410.7.9.54
5610.7.9.55/3210.7.9.55 – 10.7.9.5510.7.9.55
5710.7.9.56/3210.7.9.56 – 10.7.9.5610.7.9.56
5810.7.9.57/3210.7.9.57 – 10.7.9.5710.7.9.57
5910.7.9.58/3210.7.9.58 – 10.7.9.5810.7.9.58
6010.7.9.59/3210.7.9.59 – 10.7.9.5910.7.9.59
6110.7.9.60/3210.7.9.60 – 10.7.9.6010.7.9.60
6210.7.9.61/3210.7.9.61 – 10.7.9.6110.7.9.61
6310.7.9.62/3210.7.9.62 – 10.7.9.6210.7.9.62
6410.7.9.63/3210.7.9.63 – 10.7.9.6310.7.9.63
6510.7.9.64/3210.7.9.64 – 10.7.9.6410.7.9.64
6610.7.9.65/3210.7.9.65 – 10.7.9.6510.7.9.65
6710.7.9.66/3210.7.9.66 – 10.7.9.6610.7.9.66
6810.7.9.67/3210.7.9.67 – 10.7.9.6710.7.9.67
6910.7.9.68/3210.7.9.68 – 10.7.9.6810.7.9.68
7010.7.9.69/3210.7.9.69 – 10.7.9.6910.7.9.69
7110.7.9.70/3210.7.9.70 – 10.7.9.7010.7.9.70
7210.7.9.71/3210.7.9.71 – 10.7.9.7110.7.9.71
7310.7.9.72/3210.7.9.72 – 10.7.9.7210.7.9.72
7410.7.9.73/3210.7.9.73 – 10.7.9.7310.7.9.73
7510.7.9.74/3210.7.9.74 – 10.7.9.7410.7.9.74
7610.7.9.75/3210.7.9.75 – 10.7.9.7510.7.9.75
7710.7.9.76/3210.7.9.76 – 10.7.9.7610.7.9.76
7810.7.9.77/3210.7.9.77 – 10.7.9.7710.7.9.77
7910.7.9.78/3210.7.9.78 – 10.7.9.7810.7.9.78
8010.7.9.79/3210.7.9.79 – 10.7.9.7910.7.9.79
8110.7.9.80/3210.7.9.80 – 10.7.9.8010.7.9.80
8210.7.9.81/3210.7.9.81 – 10.7.9.8110.7.9.81
8310.7.9.82/3210.7.9.82 – 10.7.9.8210.7.9.82
8410.7.9.83/3210.7.9.83 – 10.7.9.8310.7.9.83
8510.7.9.84/3210.7.9.84 – 10.7.9.8410.7.9.84
8610.7.9.85/3210.7.9.85 – 10.7.9.8510.7.9.85
8710.7.9.86/3210.7.9.86 – 10.7.9.8610.7.9.86
8810.7.9.87/3210.7.9.87 – 10.7.9.8710.7.9.87
8910.7.9.88/3210.7.9.88 – 10.7.9.8810.7.9.88
9010.7.9.89/3210.7.9.89 – 10.7.9.8910.7.9.89
9110.7.9.90/3210.7.9.90 – 10.7.9.9010.7.9.90
9210.7.9.91/3210.7.9.91 – 10.7.9.9110.7.9.91
9310.7.9.92/3210.7.9.92 – 10.7.9.9210.7.9.92
9410.7.9.93/3210.7.9.93 – 10.7.9.9310.7.9.93
9510.7.9.94/3210.7.9.94 – 10.7.9.9410.7.9.94
9610.7.9.95/3210.7.9.95 – 10.7.9.9510.7.9.95
9710.7.9.96/3210.7.9.96 – 10.7.9.9610.7.9.96
9810.7.9.97/3210.7.9.97 – 10.7.9.9710.7.9.97
9910.7.9.98/3210.7.9.98 – 10.7.9.9810.7.9.98
10010.7.9.99/3210.7.9.99 – 10.7.9.9910.7.9.99
10110.7.9.100/3210.7.9.100 – 10.7.9.10010.7.9.100
10210.7.9.101/3210.7.9.101 – 10.7.9.10110.7.9.101
10310.7.9.102/3210.7.9.102 – 10.7.9.10210.7.9.102
10410.7.9.103/3210.7.9.103 – 10.7.9.10310.7.9.103
10510.7.9.104/3210.7.9.104 – 10.7.9.10410.7.9.104
10610.7.9.105/3210.7.9.105 – 10.7.9.10510.7.9.105
10710.7.9.106/3210.7.9.106 – 10.7.9.10610.7.9.106
10810.7.9.107/3210.7.9.107 – 10.7.9.10710.7.9.107
10910.7.9.108/3210.7.9.108 – 10.7.9.10810.7.9.108
11010.7.9.109/3210.7.9.109 – 10.7.9.10910.7.9.109
11110.7.9.110/3210.7.9.110 – 10.7.9.11010.7.9.110
11210.7.9.111/3210.7.9.111 – 10.7.9.11110.7.9.111
11310.7.9.112/3210.7.9.112 – 10.7.9.11210.7.9.112
11410.7.9.113/3210.7.9.113 – 10.7.9.11310.7.9.113
11510.7.9.114/3210.7.9.114 – 10.7.9.11410.7.9.114
11610.7.9.115/3210.7.9.115 – 10.7.9.11510.7.9.115
11710.7.9.116/3210.7.9.116 – 10.7.9.11610.7.9.116
11810.7.9.117/3210.7.9.117 – 10.7.9.11710.7.9.117
11910.7.9.118/3210.7.9.118 – 10.7.9.11810.7.9.118
12010.7.9.119/3210.7.9.119 – 10.7.9.11910.7.9.119
12110.7.9.120/3210.7.9.120 – 10.7.9.12010.7.9.120
12210.7.9.121/3210.7.9.121 – 10.7.9.12110.7.9.121
12310.7.9.122/3210.7.9.122 – 10.7.9.12210.7.9.122
12410.7.9.123/3210.7.9.123 – 10.7.9.12310.7.9.123
12510.7.9.124/3210.7.9.124 – 10.7.9.12410.7.9.124
12610.7.9.125/3210.7.9.125 – 10.7.9.12510.7.9.125
12710.7.9.126/3210.7.9.126 – 10.7.9.12610.7.9.126
12810.7.9.127/3210.7.9.127 – 10.7.9.12710.7.9.127
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 →