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)10.2.78.0/25
network10.2.78.0/25
broadcast10.2.78.127
first host10.2.78.1
last host10.2.78.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.78.0/25
address00001010.00000010.01001110.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.01001110.00000000
broadcast00001010.00000010.01001110.01111111
green = network part, grey = host part
hex0x0a024e00
decimal167923200
reverse dns0.78.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:4e00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.78.0/3210.2.78.0 – 10.2.78.010.2.78.0
210.2.78.1/3210.2.78.1 – 10.2.78.110.2.78.1
310.2.78.2/3210.2.78.2 – 10.2.78.210.2.78.2
410.2.78.3/3210.2.78.3 – 10.2.78.310.2.78.3
510.2.78.4/3210.2.78.4 – 10.2.78.410.2.78.4
610.2.78.5/3210.2.78.5 – 10.2.78.510.2.78.5
710.2.78.6/3210.2.78.6 – 10.2.78.610.2.78.6
810.2.78.7/3210.2.78.7 – 10.2.78.710.2.78.7
910.2.78.8/3210.2.78.8 – 10.2.78.810.2.78.8
1010.2.78.9/3210.2.78.9 – 10.2.78.910.2.78.9
1110.2.78.10/3210.2.78.10 – 10.2.78.1010.2.78.10
1210.2.78.11/3210.2.78.11 – 10.2.78.1110.2.78.11
1310.2.78.12/3210.2.78.12 – 10.2.78.1210.2.78.12
1410.2.78.13/3210.2.78.13 – 10.2.78.1310.2.78.13
1510.2.78.14/3210.2.78.14 – 10.2.78.1410.2.78.14
1610.2.78.15/3210.2.78.15 – 10.2.78.1510.2.78.15
1710.2.78.16/3210.2.78.16 – 10.2.78.1610.2.78.16
1810.2.78.17/3210.2.78.17 – 10.2.78.1710.2.78.17
1910.2.78.18/3210.2.78.18 – 10.2.78.1810.2.78.18
2010.2.78.19/3210.2.78.19 – 10.2.78.1910.2.78.19
2110.2.78.20/3210.2.78.20 – 10.2.78.2010.2.78.20
2210.2.78.21/3210.2.78.21 – 10.2.78.2110.2.78.21
2310.2.78.22/3210.2.78.22 – 10.2.78.2210.2.78.22
2410.2.78.23/3210.2.78.23 – 10.2.78.2310.2.78.23
2510.2.78.24/3210.2.78.24 – 10.2.78.2410.2.78.24
2610.2.78.25/3210.2.78.25 – 10.2.78.2510.2.78.25
2710.2.78.26/3210.2.78.26 – 10.2.78.2610.2.78.26
2810.2.78.27/3210.2.78.27 – 10.2.78.2710.2.78.27
2910.2.78.28/3210.2.78.28 – 10.2.78.2810.2.78.28
3010.2.78.29/3210.2.78.29 – 10.2.78.2910.2.78.29
3110.2.78.30/3210.2.78.30 – 10.2.78.3010.2.78.30
3210.2.78.31/3210.2.78.31 – 10.2.78.3110.2.78.31
3310.2.78.32/3210.2.78.32 – 10.2.78.3210.2.78.32
3410.2.78.33/3210.2.78.33 – 10.2.78.3310.2.78.33
3510.2.78.34/3210.2.78.34 – 10.2.78.3410.2.78.34
3610.2.78.35/3210.2.78.35 – 10.2.78.3510.2.78.35
3710.2.78.36/3210.2.78.36 – 10.2.78.3610.2.78.36
3810.2.78.37/3210.2.78.37 – 10.2.78.3710.2.78.37
3910.2.78.38/3210.2.78.38 – 10.2.78.3810.2.78.38
4010.2.78.39/3210.2.78.39 – 10.2.78.3910.2.78.39
4110.2.78.40/3210.2.78.40 – 10.2.78.4010.2.78.40
4210.2.78.41/3210.2.78.41 – 10.2.78.4110.2.78.41
4310.2.78.42/3210.2.78.42 – 10.2.78.4210.2.78.42
4410.2.78.43/3210.2.78.43 – 10.2.78.4310.2.78.43
4510.2.78.44/3210.2.78.44 – 10.2.78.4410.2.78.44
4610.2.78.45/3210.2.78.45 – 10.2.78.4510.2.78.45
4710.2.78.46/3210.2.78.46 – 10.2.78.4610.2.78.46
4810.2.78.47/3210.2.78.47 – 10.2.78.4710.2.78.47
4910.2.78.48/3210.2.78.48 – 10.2.78.4810.2.78.48
5010.2.78.49/3210.2.78.49 – 10.2.78.4910.2.78.49
5110.2.78.50/3210.2.78.50 – 10.2.78.5010.2.78.50
5210.2.78.51/3210.2.78.51 – 10.2.78.5110.2.78.51
5310.2.78.52/3210.2.78.52 – 10.2.78.5210.2.78.52
5410.2.78.53/3210.2.78.53 – 10.2.78.5310.2.78.53
5510.2.78.54/3210.2.78.54 – 10.2.78.5410.2.78.54
5610.2.78.55/3210.2.78.55 – 10.2.78.5510.2.78.55
5710.2.78.56/3210.2.78.56 – 10.2.78.5610.2.78.56
5810.2.78.57/3210.2.78.57 – 10.2.78.5710.2.78.57
5910.2.78.58/3210.2.78.58 – 10.2.78.5810.2.78.58
6010.2.78.59/3210.2.78.59 – 10.2.78.5910.2.78.59
6110.2.78.60/3210.2.78.60 – 10.2.78.6010.2.78.60
6210.2.78.61/3210.2.78.61 – 10.2.78.6110.2.78.61
6310.2.78.62/3210.2.78.62 – 10.2.78.6210.2.78.62
6410.2.78.63/3210.2.78.63 – 10.2.78.6310.2.78.63
6510.2.78.64/3210.2.78.64 – 10.2.78.6410.2.78.64
6610.2.78.65/3210.2.78.65 – 10.2.78.6510.2.78.65
6710.2.78.66/3210.2.78.66 – 10.2.78.6610.2.78.66
6810.2.78.67/3210.2.78.67 – 10.2.78.6710.2.78.67
6910.2.78.68/3210.2.78.68 – 10.2.78.6810.2.78.68
7010.2.78.69/3210.2.78.69 – 10.2.78.6910.2.78.69
7110.2.78.70/3210.2.78.70 – 10.2.78.7010.2.78.70
7210.2.78.71/3210.2.78.71 – 10.2.78.7110.2.78.71
7310.2.78.72/3210.2.78.72 – 10.2.78.7210.2.78.72
7410.2.78.73/3210.2.78.73 – 10.2.78.7310.2.78.73
7510.2.78.74/3210.2.78.74 – 10.2.78.7410.2.78.74
7610.2.78.75/3210.2.78.75 – 10.2.78.7510.2.78.75
7710.2.78.76/3210.2.78.76 – 10.2.78.7610.2.78.76
7810.2.78.77/3210.2.78.77 – 10.2.78.7710.2.78.77
7910.2.78.78/3210.2.78.78 – 10.2.78.7810.2.78.78
8010.2.78.79/3210.2.78.79 – 10.2.78.7910.2.78.79
8110.2.78.80/3210.2.78.80 – 10.2.78.8010.2.78.80
8210.2.78.81/3210.2.78.81 – 10.2.78.8110.2.78.81
8310.2.78.82/3210.2.78.82 – 10.2.78.8210.2.78.82
8410.2.78.83/3210.2.78.83 – 10.2.78.8310.2.78.83
8510.2.78.84/3210.2.78.84 – 10.2.78.8410.2.78.84
8610.2.78.85/3210.2.78.85 – 10.2.78.8510.2.78.85
8710.2.78.86/3210.2.78.86 – 10.2.78.8610.2.78.86
8810.2.78.87/3210.2.78.87 – 10.2.78.8710.2.78.87
8910.2.78.88/3210.2.78.88 – 10.2.78.8810.2.78.88
9010.2.78.89/3210.2.78.89 – 10.2.78.8910.2.78.89
9110.2.78.90/3210.2.78.90 – 10.2.78.9010.2.78.90
9210.2.78.91/3210.2.78.91 – 10.2.78.9110.2.78.91
9310.2.78.92/3210.2.78.92 – 10.2.78.9210.2.78.92
9410.2.78.93/3210.2.78.93 – 10.2.78.9310.2.78.93
9510.2.78.94/3210.2.78.94 – 10.2.78.9410.2.78.94
9610.2.78.95/3210.2.78.95 – 10.2.78.9510.2.78.95
9710.2.78.96/3210.2.78.96 – 10.2.78.9610.2.78.96
9810.2.78.97/3210.2.78.97 – 10.2.78.9710.2.78.97
9910.2.78.98/3210.2.78.98 – 10.2.78.9810.2.78.98
10010.2.78.99/3210.2.78.99 – 10.2.78.9910.2.78.99
10110.2.78.100/3210.2.78.100 – 10.2.78.10010.2.78.100
10210.2.78.101/3210.2.78.101 – 10.2.78.10110.2.78.101
10310.2.78.102/3210.2.78.102 – 10.2.78.10210.2.78.102
10410.2.78.103/3210.2.78.103 – 10.2.78.10310.2.78.103
10510.2.78.104/3210.2.78.104 – 10.2.78.10410.2.78.104
10610.2.78.105/3210.2.78.105 – 10.2.78.10510.2.78.105
10710.2.78.106/3210.2.78.106 – 10.2.78.10610.2.78.106
10810.2.78.107/3210.2.78.107 – 10.2.78.10710.2.78.107
10910.2.78.108/3210.2.78.108 – 10.2.78.10810.2.78.108
11010.2.78.109/3210.2.78.109 – 10.2.78.10910.2.78.109
11110.2.78.110/3210.2.78.110 – 10.2.78.11010.2.78.110
11210.2.78.111/3210.2.78.111 – 10.2.78.11110.2.78.111
11310.2.78.112/3210.2.78.112 – 10.2.78.11210.2.78.112
11410.2.78.113/3210.2.78.113 – 10.2.78.11310.2.78.113
11510.2.78.114/3210.2.78.114 – 10.2.78.11410.2.78.114
11610.2.78.115/3210.2.78.115 – 10.2.78.11510.2.78.115
11710.2.78.116/3210.2.78.116 – 10.2.78.11610.2.78.116
11810.2.78.117/3210.2.78.117 – 10.2.78.11710.2.78.117
11910.2.78.118/3210.2.78.118 – 10.2.78.11810.2.78.118
12010.2.78.119/3210.2.78.119 – 10.2.78.11910.2.78.119
12110.2.78.120/3210.2.78.120 – 10.2.78.12010.2.78.120
12210.2.78.121/3210.2.78.121 – 10.2.78.12110.2.78.121
12310.2.78.122/3210.2.78.122 – 10.2.78.12210.2.78.122
12410.2.78.123/3210.2.78.123 – 10.2.78.12310.2.78.123
12510.2.78.124/3210.2.78.124 – 10.2.78.12410.2.78.124
12610.2.78.125/3210.2.78.125 – 10.2.78.12510.2.78.125
12710.2.78.126/3210.2.78.126 – 10.2.78.12610.2.78.126
12810.2.78.127/3210.2.78.127 – 10.2.78.12710.2.78.127
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 →