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)10.2.104.0/25
network10.2.104.0/25
broadcast10.2.104.127
first host10.2.104.1
last host10.2.104.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.104.0/25
address00001010.00000010.01101000.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.01101000.00000000
broadcast00001010.00000010.01101000.01111111
green = network part, grey = host part
hex0x0a026800
decimal167929856
reverse dns0.104.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:6800

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.104.0/3210.2.104.0 – 10.2.104.010.2.104.0
210.2.104.1/3210.2.104.1 – 10.2.104.110.2.104.1
310.2.104.2/3210.2.104.2 – 10.2.104.210.2.104.2
410.2.104.3/3210.2.104.3 – 10.2.104.310.2.104.3
510.2.104.4/3210.2.104.4 – 10.2.104.410.2.104.4
610.2.104.5/3210.2.104.5 – 10.2.104.510.2.104.5
710.2.104.6/3210.2.104.6 – 10.2.104.610.2.104.6
810.2.104.7/3210.2.104.7 – 10.2.104.710.2.104.7
910.2.104.8/3210.2.104.8 – 10.2.104.810.2.104.8
1010.2.104.9/3210.2.104.9 – 10.2.104.910.2.104.9
1110.2.104.10/3210.2.104.10 – 10.2.104.1010.2.104.10
1210.2.104.11/3210.2.104.11 – 10.2.104.1110.2.104.11
1310.2.104.12/3210.2.104.12 – 10.2.104.1210.2.104.12
1410.2.104.13/3210.2.104.13 – 10.2.104.1310.2.104.13
1510.2.104.14/3210.2.104.14 – 10.2.104.1410.2.104.14
1610.2.104.15/3210.2.104.15 – 10.2.104.1510.2.104.15
1710.2.104.16/3210.2.104.16 – 10.2.104.1610.2.104.16
1810.2.104.17/3210.2.104.17 – 10.2.104.1710.2.104.17
1910.2.104.18/3210.2.104.18 – 10.2.104.1810.2.104.18
2010.2.104.19/3210.2.104.19 – 10.2.104.1910.2.104.19
2110.2.104.20/3210.2.104.20 – 10.2.104.2010.2.104.20
2210.2.104.21/3210.2.104.21 – 10.2.104.2110.2.104.21
2310.2.104.22/3210.2.104.22 – 10.2.104.2210.2.104.22
2410.2.104.23/3210.2.104.23 – 10.2.104.2310.2.104.23
2510.2.104.24/3210.2.104.24 – 10.2.104.2410.2.104.24
2610.2.104.25/3210.2.104.25 – 10.2.104.2510.2.104.25
2710.2.104.26/3210.2.104.26 – 10.2.104.2610.2.104.26
2810.2.104.27/3210.2.104.27 – 10.2.104.2710.2.104.27
2910.2.104.28/3210.2.104.28 – 10.2.104.2810.2.104.28
3010.2.104.29/3210.2.104.29 – 10.2.104.2910.2.104.29
3110.2.104.30/3210.2.104.30 – 10.2.104.3010.2.104.30
3210.2.104.31/3210.2.104.31 – 10.2.104.3110.2.104.31
3310.2.104.32/3210.2.104.32 – 10.2.104.3210.2.104.32
3410.2.104.33/3210.2.104.33 – 10.2.104.3310.2.104.33
3510.2.104.34/3210.2.104.34 – 10.2.104.3410.2.104.34
3610.2.104.35/3210.2.104.35 – 10.2.104.3510.2.104.35
3710.2.104.36/3210.2.104.36 – 10.2.104.3610.2.104.36
3810.2.104.37/3210.2.104.37 – 10.2.104.3710.2.104.37
3910.2.104.38/3210.2.104.38 – 10.2.104.3810.2.104.38
4010.2.104.39/3210.2.104.39 – 10.2.104.3910.2.104.39
4110.2.104.40/3210.2.104.40 – 10.2.104.4010.2.104.40
4210.2.104.41/3210.2.104.41 – 10.2.104.4110.2.104.41
4310.2.104.42/3210.2.104.42 – 10.2.104.4210.2.104.42
4410.2.104.43/3210.2.104.43 – 10.2.104.4310.2.104.43
4510.2.104.44/3210.2.104.44 – 10.2.104.4410.2.104.44
4610.2.104.45/3210.2.104.45 – 10.2.104.4510.2.104.45
4710.2.104.46/3210.2.104.46 – 10.2.104.4610.2.104.46
4810.2.104.47/3210.2.104.47 – 10.2.104.4710.2.104.47
4910.2.104.48/3210.2.104.48 – 10.2.104.4810.2.104.48
5010.2.104.49/3210.2.104.49 – 10.2.104.4910.2.104.49
5110.2.104.50/3210.2.104.50 – 10.2.104.5010.2.104.50
5210.2.104.51/3210.2.104.51 – 10.2.104.5110.2.104.51
5310.2.104.52/3210.2.104.52 – 10.2.104.5210.2.104.52
5410.2.104.53/3210.2.104.53 – 10.2.104.5310.2.104.53
5510.2.104.54/3210.2.104.54 – 10.2.104.5410.2.104.54
5610.2.104.55/3210.2.104.55 – 10.2.104.5510.2.104.55
5710.2.104.56/3210.2.104.56 – 10.2.104.5610.2.104.56
5810.2.104.57/3210.2.104.57 – 10.2.104.5710.2.104.57
5910.2.104.58/3210.2.104.58 – 10.2.104.5810.2.104.58
6010.2.104.59/3210.2.104.59 – 10.2.104.5910.2.104.59
6110.2.104.60/3210.2.104.60 – 10.2.104.6010.2.104.60
6210.2.104.61/3210.2.104.61 – 10.2.104.6110.2.104.61
6310.2.104.62/3210.2.104.62 – 10.2.104.6210.2.104.62
6410.2.104.63/3210.2.104.63 – 10.2.104.6310.2.104.63
6510.2.104.64/3210.2.104.64 – 10.2.104.6410.2.104.64
6610.2.104.65/3210.2.104.65 – 10.2.104.6510.2.104.65
6710.2.104.66/3210.2.104.66 – 10.2.104.6610.2.104.66
6810.2.104.67/3210.2.104.67 – 10.2.104.6710.2.104.67
6910.2.104.68/3210.2.104.68 – 10.2.104.6810.2.104.68
7010.2.104.69/3210.2.104.69 – 10.2.104.6910.2.104.69
7110.2.104.70/3210.2.104.70 – 10.2.104.7010.2.104.70
7210.2.104.71/3210.2.104.71 – 10.2.104.7110.2.104.71
7310.2.104.72/3210.2.104.72 – 10.2.104.7210.2.104.72
7410.2.104.73/3210.2.104.73 – 10.2.104.7310.2.104.73
7510.2.104.74/3210.2.104.74 – 10.2.104.7410.2.104.74
7610.2.104.75/3210.2.104.75 – 10.2.104.7510.2.104.75
7710.2.104.76/3210.2.104.76 – 10.2.104.7610.2.104.76
7810.2.104.77/3210.2.104.77 – 10.2.104.7710.2.104.77
7910.2.104.78/3210.2.104.78 – 10.2.104.7810.2.104.78
8010.2.104.79/3210.2.104.79 – 10.2.104.7910.2.104.79
8110.2.104.80/3210.2.104.80 – 10.2.104.8010.2.104.80
8210.2.104.81/3210.2.104.81 – 10.2.104.8110.2.104.81
8310.2.104.82/3210.2.104.82 – 10.2.104.8210.2.104.82
8410.2.104.83/3210.2.104.83 – 10.2.104.8310.2.104.83
8510.2.104.84/3210.2.104.84 – 10.2.104.8410.2.104.84
8610.2.104.85/3210.2.104.85 – 10.2.104.8510.2.104.85
8710.2.104.86/3210.2.104.86 – 10.2.104.8610.2.104.86
8810.2.104.87/3210.2.104.87 – 10.2.104.8710.2.104.87
8910.2.104.88/3210.2.104.88 – 10.2.104.8810.2.104.88
9010.2.104.89/3210.2.104.89 – 10.2.104.8910.2.104.89
9110.2.104.90/3210.2.104.90 – 10.2.104.9010.2.104.90
9210.2.104.91/3210.2.104.91 – 10.2.104.9110.2.104.91
9310.2.104.92/3210.2.104.92 – 10.2.104.9210.2.104.92
9410.2.104.93/3210.2.104.93 – 10.2.104.9310.2.104.93
9510.2.104.94/3210.2.104.94 – 10.2.104.9410.2.104.94
9610.2.104.95/3210.2.104.95 – 10.2.104.9510.2.104.95
9710.2.104.96/3210.2.104.96 – 10.2.104.9610.2.104.96
9810.2.104.97/3210.2.104.97 – 10.2.104.9710.2.104.97
9910.2.104.98/3210.2.104.98 – 10.2.104.9810.2.104.98
10010.2.104.99/3210.2.104.99 – 10.2.104.9910.2.104.99
10110.2.104.100/3210.2.104.100 – 10.2.104.10010.2.104.100
10210.2.104.101/3210.2.104.101 – 10.2.104.10110.2.104.101
10310.2.104.102/3210.2.104.102 – 10.2.104.10210.2.104.102
10410.2.104.103/3210.2.104.103 – 10.2.104.10310.2.104.103
10510.2.104.104/3210.2.104.104 – 10.2.104.10410.2.104.104
10610.2.104.105/3210.2.104.105 – 10.2.104.10510.2.104.105
10710.2.104.106/3210.2.104.106 – 10.2.104.10610.2.104.106
10810.2.104.107/3210.2.104.107 – 10.2.104.10710.2.104.107
10910.2.104.108/3210.2.104.108 – 10.2.104.10810.2.104.108
11010.2.104.109/3210.2.104.109 – 10.2.104.10910.2.104.109
11110.2.104.110/3210.2.104.110 – 10.2.104.11010.2.104.110
11210.2.104.111/3210.2.104.111 – 10.2.104.11110.2.104.111
11310.2.104.112/3210.2.104.112 – 10.2.104.11210.2.104.112
11410.2.104.113/3210.2.104.113 – 10.2.104.11310.2.104.113
11510.2.104.114/3210.2.104.114 – 10.2.104.11410.2.104.114
11610.2.104.115/3210.2.104.115 – 10.2.104.11510.2.104.115
11710.2.104.116/3210.2.104.116 – 10.2.104.11610.2.104.116
11810.2.104.117/3210.2.104.117 – 10.2.104.11710.2.104.117
11910.2.104.118/3210.2.104.118 – 10.2.104.11810.2.104.118
12010.2.104.119/3210.2.104.119 – 10.2.104.11910.2.104.119
12110.2.104.120/3210.2.104.120 – 10.2.104.12010.2.104.120
12210.2.104.121/3210.2.104.121 – 10.2.104.12110.2.104.121
12310.2.104.122/3210.2.104.122 – 10.2.104.12210.2.104.122
12410.2.104.123/3210.2.104.123 – 10.2.104.12310.2.104.123
12510.2.104.124/3210.2.104.124 – 10.2.104.12410.2.104.124
12610.2.104.125/3210.2.104.125 – 10.2.104.12510.2.104.125
12710.2.104.126/3210.2.104.126 – 10.2.104.12610.2.104.126
12810.2.104.127/3210.2.104.127 – 10.2.104.12710.2.104.127
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 →