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)10.78.85.0/25
network10.78.85.0/25
broadcast10.78.85.127
first host10.78.85.1
last host10.78.85.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.85.0/25
address00001010.01001110.01010101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.01010101.00000000
broadcast00001010.01001110.01010101.01111111
green = network part, grey = host part
hex0x0a4e5500
decimal172905728
reverse dns0.85.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:5500

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.85.0/3210.78.85.0 – 10.78.85.010.78.85.0
210.78.85.1/3210.78.85.1 – 10.78.85.110.78.85.1
310.78.85.2/3210.78.85.2 – 10.78.85.210.78.85.2
410.78.85.3/3210.78.85.3 – 10.78.85.310.78.85.3
510.78.85.4/3210.78.85.4 – 10.78.85.410.78.85.4
610.78.85.5/3210.78.85.5 – 10.78.85.510.78.85.5
710.78.85.6/3210.78.85.6 – 10.78.85.610.78.85.6
810.78.85.7/3210.78.85.7 – 10.78.85.710.78.85.7
910.78.85.8/3210.78.85.8 – 10.78.85.810.78.85.8
1010.78.85.9/3210.78.85.9 – 10.78.85.910.78.85.9
1110.78.85.10/3210.78.85.10 – 10.78.85.1010.78.85.10
1210.78.85.11/3210.78.85.11 – 10.78.85.1110.78.85.11
1310.78.85.12/3210.78.85.12 – 10.78.85.1210.78.85.12
1410.78.85.13/3210.78.85.13 – 10.78.85.1310.78.85.13
1510.78.85.14/3210.78.85.14 – 10.78.85.1410.78.85.14
1610.78.85.15/3210.78.85.15 – 10.78.85.1510.78.85.15
1710.78.85.16/3210.78.85.16 – 10.78.85.1610.78.85.16
1810.78.85.17/3210.78.85.17 – 10.78.85.1710.78.85.17
1910.78.85.18/3210.78.85.18 – 10.78.85.1810.78.85.18
2010.78.85.19/3210.78.85.19 – 10.78.85.1910.78.85.19
2110.78.85.20/3210.78.85.20 – 10.78.85.2010.78.85.20
2210.78.85.21/3210.78.85.21 – 10.78.85.2110.78.85.21
2310.78.85.22/3210.78.85.22 – 10.78.85.2210.78.85.22
2410.78.85.23/3210.78.85.23 – 10.78.85.2310.78.85.23
2510.78.85.24/3210.78.85.24 – 10.78.85.2410.78.85.24
2610.78.85.25/3210.78.85.25 – 10.78.85.2510.78.85.25
2710.78.85.26/3210.78.85.26 – 10.78.85.2610.78.85.26
2810.78.85.27/3210.78.85.27 – 10.78.85.2710.78.85.27
2910.78.85.28/3210.78.85.28 – 10.78.85.2810.78.85.28
3010.78.85.29/3210.78.85.29 – 10.78.85.2910.78.85.29
3110.78.85.30/3210.78.85.30 – 10.78.85.3010.78.85.30
3210.78.85.31/3210.78.85.31 – 10.78.85.3110.78.85.31
3310.78.85.32/3210.78.85.32 – 10.78.85.3210.78.85.32
3410.78.85.33/3210.78.85.33 – 10.78.85.3310.78.85.33
3510.78.85.34/3210.78.85.34 – 10.78.85.3410.78.85.34
3610.78.85.35/3210.78.85.35 – 10.78.85.3510.78.85.35
3710.78.85.36/3210.78.85.36 – 10.78.85.3610.78.85.36
3810.78.85.37/3210.78.85.37 – 10.78.85.3710.78.85.37
3910.78.85.38/3210.78.85.38 – 10.78.85.3810.78.85.38
4010.78.85.39/3210.78.85.39 – 10.78.85.3910.78.85.39
4110.78.85.40/3210.78.85.40 – 10.78.85.4010.78.85.40
4210.78.85.41/3210.78.85.41 – 10.78.85.4110.78.85.41
4310.78.85.42/3210.78.85.42 – 10.78.85.4210.78.85.42
4410.78.85.43/3210.78.85.43 – 10.78.85.4310.78.85.43
4510.78.85.44/3210.78.85.44 – 10.78.85.4410.78.85.44
4610.78.85.45/3210.78.85.45 – 10.78.85.4510.78.85.45
4710.78.85.46/3210.78.85.46 – 10.78.85.4610.78.85.46
4810.78.85.47/3210.78.85.47 – 10.78.85.4710.78.85.47
4910.78.85.48/3210.78.85.48 – 10.78.85.4810.78.85.48
5010.78.85.49/3210.78.85.49 – 10.78.85.4910.78.85.49
5110.78.85.50/3210.78.85.50 – 10.78.85.5010.78.85.50
5210.78.85.51/3210.78.85.51 – 10.78.85.5110.78.85.51
5310.78.85.52/3210.78.85.52 – 10.78.85.5210.78.85.52
5410.78.85.53/3210.78.85.53 – 10.78.85.5310.78.85.53
5510.78.85.54/3210.78.85.54 – 10.78.85.5410.78.85.54
5610.78.85.55/3210.78.85.55 – 10.78.85.5510.78.85.55
5710.78.85.56/3210.78.85.56 – 10.78.85.5610.78.85.56
5810.78.85.57/3210.78.85.57 – 10.78.85.5710.78.85.57
5910.78.85.58/3210.78.85.58 – 10.78.85.5810.78.85.58
6010.78.85.59/3210.78.85.59 – 10.78.85.5910.78.85.59
6110.78.85.60/3210.78.85.60 – 10.78.85.6010.78.85.60
6210.78.85.61/3210.78.85.61 – 10.78.85.6110.78.85.61
6310.78.85.62/3210.78.85.62 – 10.78.85.6210.78.85.62
6410.78.85.63/3210.78.85.63 – 10.78.85.6310.78.85.63
6510.78.85.64/3210.78.85.64 – 10.78.85.6410.78.85.64
6610.78.85.65/3210.78.85.65 – 10.78.85.6510.78.85.65
6710.78.85.66/3210.78.85.66 – 10.78.85.6610.78.85.66
6810.78.85.67/3210.78.85.67 – 10.78.85.6710.78.85.67
6910.78.85.68/3210.78.85.68 – 10.78.85.6810.78.85.68
7010.78.85.69/3210.78.85.69 – 10.78.85.6910.78.85.69
7110.78.85.70/3210.78.85.70 – 10.78.85.7010.78.85.70
7210.78.85.71/3210.78.85.71 – 10.78.85.7110.78.85.71
7310.78.85.72/3210.78.85.72 – 10.78.85.7210.78.85.72
7410.78.85.73/3210.78.85.73 – 10.78.85.7310.78.85.73
7510.78.85.74/3210.78.85.74 – 10.78.85.7410.78.85.74
7610.78.85.75/3210.78.85.75 – 10.78.85.7510.78.85.75
7710.78.85.76/3210.78.85.76 – 10.78.85.7610.78.85.76
7810.78.85.77/3210.78.85.77 – 10.78.85.7710.78.85.77
7910.78.85.78/3210.78.85.78 – 10.78.85.7810.78.85.78
8010.78.85.79/3210.78.85.79 – 10.78.85.7910.78.85.79
8110.78.85.80/3210.78.85.80 – 10.78.85.8010.78.85.80
8210.78.85.81/3210.78.85.81 – 10.78.85.8110.78.85.81
8310.78.85.82/3210.78.85.82 – 10.78.85.8210.78.85.82
8410.78.85.83/3210.78.85.83 – 10.78.85.8310.78.85.83
8510.78.85.84/3210.78.85.84 – 10.78.85.8410.78.85.84
8610.78.85.85/3210.78.85.85 – 10.78.85.8510.78.85.85
8710.78.85.86/3210.78.85.86 – 10.78.85.8610.78.85.86
8810.78.85.87/3210.78.85.87 – 10.78.85.8710.78.85.87
8910.78.85.88/3210.78.85.88 – 10.78.85.8810.78.85.88
9010.78.85.89/3210.78.85.89 – 10.78.85.8910.78.85.89
9110.78.85.90/3210.78.85.90 – 10.78.85.9010.78.85.90
9210.78.85.91/3210.78.85.91 – 10.78.85.9110.78.85.91
9310.78.85.92/3210.78.85.92 – 10.78.85.9210.78.85.92
9410.78.85.93/3210.78.85.93 – 10.78.85.9310.78.85.93
9510.78.85.94/3210.78.85.94 – 10.78.85.9410.78.85.94
9610.78.85.95/3210.78.85.95 – 10.78.85.9510.78.85.95
9710.78.85.96/3210.78.85.96 – 10.78.85.9610.78.85.96
9810.78.85.97/3210.78.85.97 – 10.78.85.9710.78.85.97
9910.78.85.98/3210.78.85.98 – 10.78.85.9810.78.85.98
10010.78.85.99/3210.78.85.99 – 10.78.85.9910.78.85.99
10110.78.85.100/3210.78.85.100 – 10.78.85.10010.78.85.100
10210.78.85.101/3210.78.85.101 – 10.78.85.10110.78.85.101
10310.78.85.102/3210.78.85.102 – 10.78.85.10210.78.85.102
10410.78.85.103/3210.78.85.103 – 10.78.85.10310.78.85.103
10510.78.85.104/3210.78.85.104 – 10.78.85.10410.78.85.104
10610.78.85.105/3210.78.85.105 – 10.78.85.10510.78.85.105
10710.78.85.106/3210.78.85.106 – 10.78.85.10610.78.85.106
10810.78.85.107/3210.78.85.107 – 10.78.85.10710.78.85.107
10910.78.85.108/3210.78.85.108 – 10.78.85.10810.78.85.108
11010.78.85.109/3210.78.85.109 – 10.78.85.10910.78.85.109
11110.78.85.110/3210.78.85.110 – 10.78.85.11010.78.85.110
11210.78.85.111/3210.78.85.111 – 10.78.85.11110.78.85.111
11310.78.85.112/3210.78.85.112 – 10.78.85.11210.78.85.112
11410.78.85.113/3210.78.85.113 – 10.78.85.11310.78.85.113
11510.78.85.114/3210.78.85.114 – 10.78.85.11410.78.85.114
11610.78.85.115/3210.78.85.115 – 10.78.85.11510.78.85.115
11710.78.85.116/3210.78.85.116 – 10.78.85.11610.78.85.116
11810.78.85.117/3210.78.85.117 – 10.78.85.11710.78.85.117
11910.78.85.118/3210.78.85.118 – 10.78.85.11810.78.85.118
12010.78.85.119/3210.78.85.119 – 10.78.85.11910.78.85.119
12110.78.85.120/3210.78.85.120 – 10.78.85.12010.78.85.120
12210.78.85.121/3210.78.85.121 – 10.78.85.12110.78.85.121
12310.78.85.122/3210.78.85.122 – 10.78.85.12210.78.85.122
12410.78.85.123/3210.78.85.123 – 10.78.85.12310.78.85.123
12510.78.85.124/3210.78.85.124 – 10.78.85.12410.78.85.124
12610.78.85.125/3210.78.85.125 – 10.78.85.12510.78.85.125
12710.78.85.126/3210.78.85.126 – 10.78.85.12610.78.85.126
12810.78.85.127/3210.78.85.127 – 10.78.85.12710.78.85.127
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 →