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)10.78.25.0/25
network10.78.25.0/25
broadcast10.78.25.127
first host10.78.25.1
last host10.78.25.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.25.0/25
address00001010.01001110.00011001.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.00011001.00000000
broadcast00001010.01001110.00011001.01111111
green = network part, grey = host part
hex0x0a4e1900
decimal172890368
reverse dns0.25.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:1900

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.25.0/3210.78.25.0 – 10.78.25.010.78.25.0
210.78.25.1/3210.78.25.1 – 10.78.25.110.78.25.1
310.78.25.2/3210.78.25.2 – 10.78.25.210.78.25.2
410.78.25.3/3210.78.25.3 – 10.78.25.310.78.25.3
510.78.25.4/3210.78.25.4 – 10.78.25.410.78.25.4
610.78.25.5/3210.78.25.5 – 10.78.25.510.78.25.5
710.78.25.6/3210.78.25.6 – 10.78.25.610.78.25.6
810.78.25.7/3210.78.25.7 – 10.78.25.710.78.25.7
910.78.25.8/3210.78.25.8 – 10.78.25.810.78.25.8
1010.78.25.9/3210.78.25.9 – 10.78.25.910.78.25.9
1110.78.25.10/3210.78.25.10 – 10.78.25.1010.78.25.10
1210.78.25.11/3210.78.25.11 – 10.78.25.1110.78.25.11
1310.78.25.12/3210.78.25.12 – 10.78.25.1210.78.25.12
1410.78.25.13/3210.78.25.13 – 10.78.25.1310.78.25.13
1510.78.25.14/3210.78.25.14 – 10.78.25.1410.78.25.14
1610.78.25.15/3210.78.25.15 – 10.78.25.1510.78.25.15
1710.78.25.16/3210.78.25.16 – 10.78.25.1610.78.25.16
1810.78.25.17/3210.78.25.17 – 10.78.25.1710.78.25.17
1910.78.25.18/3210.78.25.18 – 10.78.25.1810.78.25.18
2010.78.25.19/3210.78.25.19 – 10.78.25.1910.78.25.19
2110.78.25.20/3210.78.25.20 – 10.78.25.2010.78.25.20
2210.78.25.21/3210.78.25.21 – 10.78.25.2110.78.25.21
2310.78.25.22/3210.78.25.22 – 10.78.25.2210.78.25.22
2410.78.25.23/3210.78.25.23 – 10.78.25.2310.78.25.23
2510.78.25.24/3210.78.25.24 – 10.78.25.2410.78.25.24
2610.78.25.25/3210.78.25.25 – 10.78.25.2510.78.25.25
2710.78.25.26/3210.78.25.26 – 10.78.25.2610.78.25.26
2810.78.25.27/3210.78.25.27 – 10.78.25.2710.78.25.27
2910.78.25.28/3210.78.25.28 – 10.78.25.2810.78.25.28
3010.78.25.29/3210.78.25.29 – 10.78.25.2910.78.25.29
3110.78.25.30/3210.78.25.30 – 10.78.25.3010.78.25.30
3210.78.25.31/3210.78.25.31 – 10.78.25.3110.78.25.31
3310.78.25.32/3210.78.25.32 – 10.78.25.3210.78.25.32
3410.78.25.33/3210.78.25.33 – 10.78.25.3310.78.25.33
3510.78.25.34/3210.78.25.34 – 10.78.25.3410.78.25.34
3610.78.25.35/3210.78.25.35 – 10.78.25.3510.78.25.35
3710.78.25.36/3210.78.25.36 – 10.78.25.3610.78.25.36
3810.78.25.37/3210.78.25.37 – 10.78.25.3710.78.25.37
3910.78.25.38/3210.78.25.38 – 10.78.25.3810.78.25.38
4010.78.25.39/3210.78.25.39 – 10.78.25.3910.78.25.39
4110.78.25.40/3210.78.25.40 – 10.78.25.4010.78.25.40
4210.78.25.41/3210.78.25.41 – 10.78.25.4110.78.25.41
4310.78.25.42/3210.78.25.42 – 10.78.25.4210.78.25.42
4410.78.25.43/3210.78.25.43 – 10.78.25.4310.78.25.43
4510.78.25.44/3210.78.25.44 – 10.78.25.4410.78.25.44
4610.78.25.45/3210.78.25.45 – 10.78.25.4510.78.25.45
4710.78.25.46/3210.78.25.46 – 10.78.25.4610.78.25.46
4810.78.25.47/3210.78.25.47 – 10.78.25.4710.78.25.47
4910.78.25.48/3210.78.25.48 – 10.78.25.4810.78.25.48
5010.78.25.49/3210.78.25.49 – 10.78.25.4910.78.25.49
5110.78.25.50/3210.78.25.50 – 10.78.25.5010.78.25.50
5210.78.25.51/3210.78.25.51 – 10.78.25.5110.78.25.51
5310.78.25.52/3210.78.25.52 – 10.78.25.5210.78.25.52
5410.78.25.53/3210.78.25.53 – 10.78.25.5310.78.25.53
5510.78.25.54/3210.78.25.54 – 10.78.25.5410.78.25.54
5610.78.25.55/3210.78.25.55 – 10.78.25.5510.78.25.55
5710.78.25.56/3210.78.25.56 – 10.78.25.5610.78.25.56
5810.78.25.57/3210.78.25.57 – 10.78.25.5710.78.25.57
5910.78.25.58/3210.78.25.58 – 10.78.25.5810.78.25.58
6010.78.25.59/3210.78.25.59 – 10.78.25.5910.78.25.59
6110.78.25.60/3210.78.25.60 – 10.78.25.6010.78.25.60
6210.78.25.61/3210.78.25.61 – 10.78.25.6110.78.25.61
6310.78.25.62/3210.78.25.62 – 10.78.25.6210.78.25.62
6410.78.25.63/3210.78.25.63 – 10.78.25.6310.78.25.63
6510.78.25.64/3210.78.25.64 – 10.78.25.6410.78.25.64
6610.78.25.65/3210.78.25.65 – 10.78.25.6510.78.25.65
6710.78.25.66/3210.78.25.66 – 10.78.25.6610.78.25.66
6810.78.25.67/3210.78.25.67 – 10.78.25.6710.78.25.67
6910.78.25.68/3210.78.25.68 – 10.78.25.6810.78.25.68
7010.78.25.69/3210.78.25.69 – 10.78.25.6910.78.25.69
7110.78.25.70/3210.78.25.70 – 10.78.25.7010.78.25.70
7210.78.25.71/3210.78.25.71 – 10.78.25.7110.78.25.71
7310.78.25.72/3210.78.25.72 – 10.78.25.7210.78.25.72
7410.78.25.73/3210.78.25.73 – 10.78.25.7310.78.25.73
7510.78.25.74/3210.78.25.74 – 10.78.25.7410.78.25.74
7610.78.25.75/3210.78.25.75 – 10.78.25.7510.78.25.75
7710.78.25.76/3210.78.25.76 – 10.78.25.7610.78.25.76
7810.78.25.77/3210.78.25.77 – 10.78.25.7710.78.25.77
7910.78.25.78/3210.78.25.78 – 10.78.25.7810.78.25.78
8010.78.25.79/3210.78.25.79 – 10.78.25.7910.78.25.79
8110.78.25.80/3210.78.25.80 – 10.78.25.8010.78.25.80
8210.78.25.81/3210.78.25.81 – 10.78.25.8110.78.25.81
8310.78.25.82/3210.78.25.82 – 10.78.25.8210.78.25.82
8410.78.25.83/3210.78.25.83 – 10.78.25.8310.78.25.83
8510.78.25.84/3210.78.25.84 – 10.78.25.8410.78.25.84
8610.78.25.85/3210.78.25.85 – 10.78.25.8510.78.25.85
8710.78.25.86/3210.78.25.86 – 10.78.25.8610.78.25.86
8810.78.25.87/3210.78.25.87 – 10.78.25.8710.78.25.87
8910.78.25.88/3210.78.25.88 – 10.78.25.8810.78.25.88
9010.78.25.89/3210.78.25.89 – 10.78.25.8910.78.25.89
9110.78.25.90/3210.78.25.90 – 10.78.25.9010.78.25.90
9210.78.25.91/3210.78.25.91 – 10.78.25.9110.78.25.91
9310.78.25.92/3210.78.25.92 – 10.78.25.9210.78.25.92
9410.78.25.93/3210.78.25.93 – 10.78.25.9310.78.25.93
9510.78.25.94/3210.78.25.94 – 10.78.25.9410.78.25.94
9610.78.25.95/3210.78.25.95 – 10.78.25.9510.78.25.95
9710.78.25.96/3210.78.25.96 – 10.78.25.9610.78.25.96
9810.78.25.97/3210.78.25.97 – 10.78.25.9710.78.25.97
9910.78.25.98/3210.78.25.98 – 10.78.25.9810.78.25.98
10010.78.25.99/3210.78.25.99 – 10.78.25.9910.78.25.99
10110.78.25.100/3210.78.25.100 – 10.78.25.10010.78.25.100
10210.78.25.101/3210.78.25.101 – 10.78.25.10110.78.25.101
10310.78.25.102/3210.78.25.102 – 10.78.25.10210.78.25.102
10410.78.25.103/3210.78.25.103 – 10.78.25.10310.78.25.103
10510.78.25.104/3210.78.25.104 – 10.78.25.10410.78.25.104
10610.78.25.105/3210.78.25.105 – 10.78.25.10510.78.25.105
10710.78.25.106/3210.78.25.106 – 10.78.25.10610.78.25.106
10810.78.25.107/3210.78.25.107 – 10.78.25.10710.78.25.107
10910.78.25.108/3210.78.25.108 – 10.78.25.10810.78.25.108
11010.78.25.109/3210.78.25.109 – 10.78.25.10910.78.25.109
11110.78.25.110/3210.78.25.110 – 10.78.25.11010.78.25.110
11210.78.25.111/3210.78.25.111 – 10.78.25.11110.78.25.111
11310.78.25.112/3210.78.25.112 – 10.78.25.11210.78.25.112
11410.78.25.113/3210.78.25.113 – 10.78.25.11310.78.25.113
11510.78.25.114/3210.78.25.114 – 10.78.25.11410.78.25.114
11610.78.25.115/3210.78.25.115 – 10.78.25.11510.78.25.115
11710.78.25.116/3210.78.25.116 – 10.78.25.11610.78.25.116
11810.78.25.117/3210.78.25.117 – 10.78.25.11710.78.25.117
11910.78.25.118/3210.78.25.118 – 10.78.25.11810.78.25.118
12010.78.25.119/3210.78.25.119 – 10.78.25.11910.78.25.119
12110.78.25.120/3210.78.25.120 – 10.78.25.12010.78.25.120
12210.78.25.121/3210.78.25.121 – 10.78.25.12110.78.25.121
12310.78.25.122/3210.78.25.122 – 10.78.25.12210.78.25.122
12410.78.25.123/3210.78.25.123 – 10.78.25.12310.78.25.123
12510.78.25.124/3210.78.25.124 – 10.78.25.12410.78.25.124
12610.78.25.125/3210.78.25.125 – 10.78.25.12510.78.25.125
12710.78.25.126/3210.78.25.126 – 10.78.25.12610.78.25.126
12810.78.25.127/3210.78.25.127 – 10.78.25.12710.78.25.127
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 →