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)10.2.28.0/25
network10.2.28.0/25
broadcast10.2.28.127
first host10.2.28.1
last host10.2.28.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.28.0/25
address00001010.00000010.00011100.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00011100.00000000
broadcast00001010.00000010.00011100.01111111
green = network part, grey = host part
hex0x0a021c00
decimal167910400
reverse dns0.28.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:1c00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.28.0/3210.2.28.0 – 10.2.28.010.2.28.0
210.2.28.1/3210.2.28.1 – 10.2.28.110.2.28.1
310.2.28.2/3210.2.28.2 – 10.2.28.210.2.28.2
410.2.28.3/3210.2.28.3 – 10.2.28.310.2.28.3
510.2.28.4/3210.2.28.4 – 10.2.28.410.2.28.4
610.2.28.5/3210.2.28.5 – 10.2.28.510.2.28.5
710.2.28.6/3210.2.28.6 – 10.2.28.610.2.28.6
810.2.28.7/3210.2.28.7 – 10.2.28.710.2.28.7
910.2.28.8/3210.2.28.8 – 10.2.28.810.2.28.8
1010.2.28.9/3210.2.28.9 – 10.2.28.910.2.28.9
1110.2.28.10/3210.2.28.10 – 10.2.28.1010.2.28.10
1210.2.28.11/3210.2.28.11 – 10.2.28.1110.2.28.11
1310.2.28.12/3210.2.28.12 – 10.2.28.1210.2.28.12
1410.2.28.13/3210.2.28.13 – 10.2.28.1310.2.28.13
1510.2.28.14/3210.2.28.14 – 10.2.28.1410.2.28.14
1610.2.28.15/3210.2.28.15 – 10.2.28.1510.2.28.15
1710.2.28.16/3210.2.28.16 – 10.2.28.1610.2.28.16
1810.2.28.17/3210.2.28.17 – 10.2.28.1710.2.28.17
1910.2.28.18/3210.2.28.18 – 10.2.28.1810.2.28.18
2010.2.28.19/3210.2.28.19 – 10.2.28.1910.2.28.19
2110.2.28.20/3210.2.28.20 – 10.2.28.2010.2.28.20
2210.2.28.21/3210.2.28.21 – 10.2.28.2110.2.28.21
2310.2.28.22/3210.2.28.22 – 10.2.28.2210.2.28.22
2410.2.28.23/3210.2.28.23 – 10.2.28.2310.2.28.23
2510.2.28.24/3210.2.28.24 – 10.2.28.2410.2.28.24
2610.2.28.25/3210.2.28.25 – 10.2.28.2510.2.28.25
2710.2.28.26/3210.2.28.26 – 10.2.28.2610.2.28.26
2810.2.28.27/3210.2.28.27 – 10.2.28.2710.2.28.27
2910.2.28.28/3210.2.28.28 – 10.2.28.2810.2.28.28
3010.2.28.29/3210.2.28.29 – 10.2.28.2910.2.28.29
3110.2.28.30/3210.2.28.30 – 10.2.28.3010.2.28.30
3210.2.28.31/3210.2.28.31 – 10.2.28.3110.2.28.31
3310.2.28.32/3210.2.28.32 – 10.2.28.3210.2.28.32
3410.2.28.33/3210.2.28.33 – 10.2.28.3310.2.28.33
3510.2.28.34/3210.2.28.34 – 10.2.28.3410.2.28.34
3610.2.28.35/3210.2.28.35 – 10.2.28.3510.2.28.35
3710.2.28.36/3210.2.28.36 – 10.2.28.3610.2.28.36
3810.2.28.37/3210.2.28.37 – 10.2.28.3710.2.28.37
3910.2.28.38/3210.2.28.38 – 10.2.28.3810.2.28.38
4010.2.28.39/3210.2.28.39 – 10.2.28.3910.2.28.39
4110.2.28.40/3210.2.28.40 – 10.2.28.4010.2.28.40
4210.2.28.41/3210.2.28.41 – 10.2.28.4110.2.28.41
4310.2.28.42/3210.2.28.42 – 10.2.28.4210.2.28.42
4410.2.28.43/3210.2.28.43 – 10.2.28.4310.2.28.43
4510.2.28.44/3210.2.28.44 – 10.2.28.4410.2.28.44
4610.2.28.45/3210.2.28.45 – 10.2.28.4510.2.28.45
4710.2.28.46/3210.2.28.46 – 10.2.28.4610.2.28.46
4810.2.28.47/3210.2.28.47 – 10.2.28.4710.2.28.47
4910.2.28.48/3210.2.28.48 – 10.2.28.4810.2.28.48
5010.2.28.49/3210.2.28.49 – 10.2.28.4910.2.28.49
5110.2.28.50/3210.2.28.50 – 10.2.28.5010.2.28.50
5210.2.28.51/3210.2.28.51 – 10.2.28.5110.2.28.51
5310.2.28.52/3210.2.28.52 – 10.2.28.5210.2.28.52
5410.2.28.53/3210.2.28.53 – 10.2.28.5310.2.28.53
5510.2.28.54/3210.2.28.54 – 10.2.28.5410.2.28.54
5610.2.28.55/3210.2.28.55 – 10.2.28.5510.2.28.55
5710.2.28.56/3210.2.28.56 – 10.2.28.5610.2.28.56
5810.2.28.57/3210.2.28.57 – 10.2.28.5710.2.28.57
5910.2.28.58/3210.2.28.58 – 10.2.28.5810.2.28.58
6010.2.28.59/3210.2.28.59 – 10.2.28.5910.2.28.59
6110.2.28.60/3210.2.28.60 – 10.2.28.6010.2.28.60
6210.2.28.61/3210.2.28.61 – 10.2.28.6110.2.28.61
6310.2.28.62/3210.2.28.62 – 10.2.28.6210.2.28.62
6410.2.28.63/3210.2.28.63 – 10.2.28.6310.2.28.63
6510.2.28.64/3210.2.28.64 – 10.2.28.6410.2.28.64
6610.2.28.65/3210.2.28.65 – 10.2.28.6510.2.28.65
6710.2.28.66/3210.2.28.66 – 10.2.28.6610.2.28.66
6810.2.28.67/3210.2.28.67 – 10.2.28.6710.2.28.67
6910.2.28.68/3210.2.28.68 – 10.2.28.6810.2.28.68
7010.2.28.69/3210.2.28.69 – 10.2.28.6910.2.28.69
7110.2.28.70/3210.2.28.70 – 10.2.28.7010.2.28.70
7210.2.28.71/3210.2.28.71 – 10.2.28.7110.2.28.71
7310.2.28.72/3210.2.28.72 – 10.2.28.7210.2.28.72
7410.2.28.73/3210.2.28.73 – 10.2.28.7310.2.28.73
7510.2.28.74/3210.2.28.74 – 10.2.28.7410.2.28.74
7610.2.28.75/3210.2.28.75 – 10.2.28.7510.2.28.75
7710.2.28.76/3210.2.28.76 – 10.2.28.7610.2.28.76
7810.2.28.77/3210.2.28.77 – 10.2.28.7710.2.28.77
7910.2.28.78/3210.2.28.78 – 10.2.28.7810.2.28.78
8010.2.28.79/3210.2.28.79 – 10.2.28.7910.2.28.79
8110.2.28.80/3210.2.28.80 – 10.2.28.8010.2.28.80
8210.2.28.81/3210.2.28.81 – 10.2.28.8110.2.28.81
8310.2.28.82/3210.2.28.82 – 10.2.28.8210.2.28.82
8410.2.28.83/3210.2.28.83 – 10.2.28.8310.2.28.83
8510.2.28.84/3210.2.28.84 – 10.2.28.8410.2.28.84
8610.2.28.85/3210.2.28.85 – 10.2.28.8510.2.28.85
8710.2.28.86/3210.2.28.86 – 10.2.28.8610.2.28.86
8810.2.28.87/3210.2.28.87 – 10.2.28.8710.2.28.87
8910.2.28.88/3210.2.28.88 – 10.2.28.8810.2.28.88
9010.2.28.89/3210.2.28.89 – 10.2.28.8910.2.28.89
9110.2.28.90/3210.2.28.90 – 10.2.28.9010.2.28.90
9210.2.28.91/3210.2.28.91 – 10.2.28.9110.2.28.91
9310.2.28.92/3210.2.28.92 – 10.2.28.9210.2.28.92
9410.2.28.93/3210.2.28.93 – 10.2.28.9310.2.28.93
9510.2.28.94/3210.2.28.94 – 10.2.28.9410.2.28.94
9610.2.28.95/3210.2.28.95 – 10.2.28.9510.2.28.95
9710.2.28.96/3210.2.28.96 – 10.2.28.9610.2.28.96
9810.2.28.97/3210.2.28.97 – 10.2.28.9710.2.28.97
9910.2.28.98/3210.2.28.98 – 10.2.28.9810.2.28.98
10010.2.28.99/3210.2.28.99 – 10.2.28.9910.2.28.99
10110.2.28.100/3210.2.28.100 – 10.2.28.10010.2.28.100
10210.2.28.101/3210.2.28.101 – 10.2.28.10110.2.28.101
10310.2.28.102/3210.2.28.102 – 10.2.28.10210.2.28.102
10410.2.28.103/3210.2.28.103 – 10.2.28.10310.2.28.103
10510.2.28.104/3210.2.28.104 – 10.2.28.10410.2.28.104
10610.2.28.105/3210.2.28.105 – 10.2.28.10510.2.28.105
10710.2.28.106/3210.2.28.106 – 10.2.28.10610.2.28.106
10810.2.28.107/3210.2.28.107 – 10.2.28.10710.2.28.107
10910.2.28.108/3210.2.28.108 – 10.2.28.10810.2.28.108
11010.2.28.109/3210.2.28.109 – 10.2.28.10910.2.28.109
11110.2.28.110/3210.2.28.110 – 10.2.28.11010.2.28.110
11210.2.28.111/3210.2.28.111 – 10.2.28.11110.2.28.111
11310.2.28.112/3210.2.28.112 – 10.2.28.11210.2.28.112
11410.2.28.113/3210.2.28.113 – 10.2.28.11310.2.28.113
11510.2.28.114/3210.2.28.114 – 10.2.28.11410.2.28.114
11610.2.28.115/3210.2.28.115 – 10.2.28.11510.2.28.115
11710.2.28.116/3210.2.28.116 – 10.2.28.11610.2.28.116
11810.2.28.117/3210.2.28.117 – 10.2.28.11710.2.28.117
11910.2.28.118/3210.2.28.118 – 10.2.28.11810.2.28.118
12010.2.28.119/3210.2.28.119 – 10.2.28.11910.2.28.119
12110.2.28.120/3210.2.28.120 – 10.2.28.12010.2.28.120
12210.2.28.121/3210.2.28.121 – 10.2.28.12110.2.28.121
12310.2.28.122/3210.2.28.122 – 10.2.28.12210.2.28.122
12410.2.28.123/3210.2.28.123 – 10.2.28.12310.2.28.123
12510.2.28.124/3210.2.28.124 – 10.2.28.12410.2.28.124
12610.2.28.125/3210.2.28.125 – 10.2.28.12510.2.28.125
12710.2.28.126/3210.2.28.126 – 10.2.28.12610.2.28.126
12810.2.28.127/3210.2.28.127 – 10.2.28.12710.2.28.127
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 →