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)10.78.30.0/25
network10.78.30.0/25
broadcast10.78.30.127
first host10.78.30.1
last host10.78.30.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.30.0/25
address00001010.01001110.00011110.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.00011110.00000000
broadcast00001010.01001110.00011110.01111111
green = network part, grey = host part
hex0x0a4e1e00
decimal172891648
reverse dns0.30.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:1e00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.30.0/3210.78.30.0 – 10.78.30.010.78.30.0
210.78.30.1/3210.78.30.1 – 10.78.30.110.78.30.1
310.78.30.2/3210.78.30.2 – 10.78.30.210.78.30.2
410.78.30.3/3210.78.30.3 – 10.78.30.310.78.30.3
510.78.30.4/3210.78.30.4 – 10.78.30.410.78.30.4
610.78.30.5/3210.78.30.5 – 10.78.30.510.78.30.5
710.78.30.6/3210.78.30.6 – 10.78.30.610.78.30.6
810.78.30.7/3210.78.30.7 – 10.78.30.710.78.30.7
910.78.30.8/3210.78.30.8 – 10.78.30.810.78.30.8
1010.78.30.9/3210.78.30.9 – 10.78.30.910.78.30.9
1110.78.30.10/3210.78.30.10 – 10.78.30.1010.78.30.10
1210.78.30.11/3210.78.30.11 – 10.78.30.1110.78.30.11
1310.78.30.12/3210.78.30.12 – 10.78.30.1210.78.30.12
1410.78.30.13/3210.78.30.13 – 10.78.30.1310.78.30.13
1510.78.30.14/3210.78.30.14 – 10.78.30.1410.78.30.14
1610.78.30.15/3210.78.30.15 – 10.78.30.1510.78.30.15
1710.78.30.16/3210.78.30.16 – 10.78.30.1610.78.30.16
1810.78.30.17/3210.78.30.17 – 10.78.30.1710.78.30.17
1910.78.30.18/3210.78.30.18 – 10.78.30.1810.78.30.18
2010.78.30.19/3210.78.30.19 – 10.78.30.1910.78.30.19
2110.78.30.20/3210.78.30.20 – 10.78.30.2010.78.30.20
2210.78.30.21/3210.78.30.21 – 10.78.30.2110.78.30.21
2310.78.30.22/3210.78.30.22 – 10.78.30.2210.78.30.22
2410.78.30.23/3210.78.30.23 – 10.78.30.2310.78.30.23
2510.78.30.24/3210.78.30.24 – 10.78.30.2410.78.30.24
2610.78.30.25/3210.78.30.25 – 10.78.30.2510.78.30.25
2710.78.30.26/3210.78.30.26 – 10.78.30.2610.78.30.26
2810.78.30.27/3210.78.30.27 – 10.78.30.2710.78.30.27
2910.78.30.28/3210.78.30.28 – 10.78.30.2810.78.30.28
3010.78.30.29/3210.78.30.29 – 10.78.30.2910.78.30.29
3110.78.30.30/3210.78.30.30 – 10.78.30.3010.78.30.30
3210.78.30.31/3210.78.30.31 – 10.78.30.3110.78.30.31
3310.78.30.32/3210.78.30.32 – 10.78.30.3210.78.30.32
3410.78.30.33/3210.78.30.33 – 10.78.30.3310.78.30.33
3510.78.30.34/3210.78.30.34 – 10.78.30.3410.78.30.34
3610.78.30.35/3210.78.30.35 – 10.78.30.3510.78.30.35
3710.78.30.36/3210.78.30.36 – 10.78.30.3610.78.30.36
3810.78.30.37/3210.78.30.37 – 10.78.30.3710.78.30.37
3910.78.30.38/3210.78.30.38 – 10.78.30.3810.78.30.38
4010.78.30.39/3210.78.30.39 – 10.78.30.3910.78.30.39
4110.78.30.40/3210.78.30.40 – 10.78.30.4010.78.30.40
4210.78.30.41/3210.78.30.41 – 10.78.30.4110.78.30.41
4310.78.30.42/3210.78.30.42 – 10.78.30.4210.78.30.42
4410.78.30.43/3210.78.30.43 – 10.78.30.4310.78.30.43
4510.78.30.44/3210.78.30.44 – 10.78.30.4410.78.30.44
4610.78.30.45/3210.78.30.45 – 10.78.30.4510.78.30.45
4710.78.30.46/3210.78.30.46 – 10.78.30.4610.78.30.46
4810.78.30.47/3210.78.30.47 – 10.78.30.4710.78.30.47
4910.78.30.48/3210.78.30.48 – 10.78.30.4810.78.30.48
5010.78.30.49/3210.78.30.49 – 10.78.30.4910.78.30.49
5110.78.30.50/3210.78.30.50 – 10.78.30.5010.78.30.50
5210.78.30.51/3210.78.30.51 – 10.78.30.5110.78.30.51
5310.78.30.52/3210.78.30.52 – 10.78.30.5210.78.30.52
5410.78.30.53/3210.78.30.53 – 10.78.30.5310.78.30.53
5510.78.30.54/3210.78.30.54 – 10.78.30.5410.78.30.54
5610.78.30.55/3210.78.30.55 – 10.78.30.5510.78.30.55
5710.78.30.56/3210.78.30.56 – 10.78.30.5610.78.30.56
5810.78.30.57/3210.78.30.57 – 10.78.30.5710.78.30.57
5910.78.30.58/3210.78.30.58 – 10.78.30.5810.78.30.58
6010.78.30.59/3210.78.30.59 – 10.78.30.5910.78.30.59
6110.78.30.60/3210.78.30.60 – 10.78.30.6010.78.30.60
6210.78.30.61/3210.78.30.61 – 10.78.30.6110.78.30.61
6310.78.30.62/3210.78.30.62 – 10.78.30.6210.78.30.62
6410.78.30.63/3210.78.30.63 – 10.78.30.6310.78.30.63
6510.78.30.64/3210.78.30.64 – 10.78.30.6410.78.30.64
6610.78.30.65/3210.78.30.65 – 10.78.30.6510.78.30.65
6710.78.30.66/3210.78.30.66 – 10.78.30.6610.78.30.66
6810.78.30.67/3210.78.30.67 – 10.78.30.6710.78.30.67
6910.78.30.68/3210.78.30.68 – 10.78.30.6810.78.30.68
7010.78.30.69/3210.78.30.69 – 10.78.30.6910.78.30.69
7110.78.30.70/3210.78.30.70 – 10.78.30.7010.78.30.70
7210.78.30.71/3210.78.30.71 – 10.78.30.7110.78.30.71
7310.78.30.72/3210.78.30.72 – 10.78.30.7210.78.30.72
7410.78.30.73/3210.78.30.73 – 10.78.30.7310.78.30.73
7510.78.30.74/3210.78.30.74 – 10.78.30.7410.78.30.74
7610.78.30.75/3210.78.30.75 – 10.78.30.7510.78.30.75
7710.78.30.76/3210.78.30.76 – 10.78.30.7610.78.30.76
7810.78.30.77/3210.78.30.77 – 10.78.30.7710.78.30.77
7910.78.30.78/3210.78.30.78 – 10.78.30.7810.78.30.78
8010.78.30.79/3210.78.30.79 – 10.78.30.7910.78.30.79
8110.78.30.80/3210.78.30.80 – 10.78.30.8010.78.30.80
8210.78.30.81/3210.78.30.81 – 10.78.30.8110.78.30.81
8310.78.30.82/3210.78.30.82 – 10.78.30.8210.78.30.82
8410.78.30.83/3210.78.30.83 – 10.78.30.8310.78.30.83
8510.78.30.84/3210.78.30.84 – 10.78.30.8410.78.30.84
8610.78.30.85/3210.78.30.85 – 10.78.30.8510.78.30.85
8710.78.30.86/3210.78.30.86 – 10.78.30.8610.78.30.86
8810.78.30.87/3210.78.30.87 – 10.78.30.8710.78.30.87
8910.78.30.88/3210.78.30.88 – 10.78.30.8810.78.30.88
9010.78.30.89/3210.78.30.89 – 10.78.30.8910.78.30.89
9110.78.30.90/3210.78.30.90 – 10.78.30.9010.78.30.90
9210.78.30.91/3210.78.30.91 – 10.78.30.9110.78.30.91
9310.78.30.92/3210.78.30.92 – 10.78.30.9210.78.30.92
9410.78.30.93/3210.78.30.93 – 10.78.30.9310.78.30.93
9510.78.30.94/3210.78.30.94 – 10.78.30.9410.78.30.94
9610.78.30.95/3210.78.30.95 – 10.78.30.9510.78.30.95
9710.78.30.96/3210.78.30.96 – 10.78.30.9610.78.30.96
9810.78.30.97/3210.78.30.97 – 10.78.30.9710.78.30.97
9910.78.30.98/3210.78.30.98 – 10.78.30.9810.78.30.98
10010.78.30.99/3210.78.30.99 – 10.78.30.9910.78.30.99
10110.78.30.100/3210.78.30.100 – 10.78.30.10010.78.30.100
10210.78.30.101/3210.78.30.101 – 10.78.30.10110.78.30.101
10310.78.30.102/3210.78.30.102 – 10.78.30.10210.78.30.102
10410.78.30.103/3210.78.30.103 – 10.78.30.10310.78.30.103
10510.78.30.104/3210.78.30.104 – 10.78.30.10410.78.30.104
10610.78.30.105/3210.78.30.105 – 10.78.30.10510.78.30.105
10710.78.30.106/3210.78.30.106 – 10.78.30.10610.78.30.106
10810.78.30.107/3210.78.30.107 – 10.78.30.10710.78.30.107
10910.78.30.108/3210.78.30.108 – 10.78.30.10810.78.30.108
11010.78.30.109/3210.78.30.109 – 10.78.30.10910.78.30.109
11110.78.30.110/3210.78.30.110 – 10.78.30.11010.78.30.110
11210.78.30.111/3210.78.30.111 – 10.78.30.11110.78.30.111
11310.78.30.112/3210.78.30.112 – 10.78.30.11210.78.30.112
11410.78.30.113/3210.78.30.113 – 10.78.30.11310.78.30.113
11510.78.30.114/3210.78.30.114 – 10.78.30.11410.78.30.114
11610.78.30.115/3210.78.30.115 – 10.78.30.11510.78.30.115
11710.78.30.116/3210.78.30.116 – 10.78.30.11610.78.30.116
11810.78.30.117/3210.78.30.117 – 10.78.30.11710.78.30.117
11910.78.30.118/3210.78.30.118 – 10.78.30.11810.78.30.118
12010.78.30.119/3210.78.30.119 – 10.78.30.11910.78.30.119
12110.78.30.120/3210.78.30.120 – 10.78.30.12010.78.30.120
12210.78.30.121/3210.78.30.121 – 10.78.30.12110.78.30.121
12310.78.30.122/3210.78.30.122 – 10.78.30.12210.78.30.122
12410.78.30.123/3210.78.30.123 – 10.78.30.12310.78.30.123
12510.78.30.124/3210.78.30.124 – 10.78.30.12410.78.30.124
12610.78.30.125/3210.78.30.125 – 10.78.30.12510.78.30.125
12710.78.30.126/3210.78.30.126 – 10.78.30.12610.78.30.126
12810.78.30.127/3210.78.30.127 – 10.78.30.12710.78.30.127
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 →