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)10.231.87.0/25
network10.231.87.0/25
broadcast10.231.87.127
first host10.231.87.1
last host10.231.87.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.231.87.0/25
address00001010.11100111.01010111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.11100111.01010111.00000000
broadcast00001010.11100111.01010111.01111111
green = network part, grey = host part
hex0x0ae75700
decimal182933248
reverse dns0.87.231.10.in-addr.arpa
ipv4-mapped::ffff:ae7:5700

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.231.87.0/3210.231.87.0 – 10.231.87.010.231.87.0
210.231.87.1/3210.231.87.1 – 10.231.87.110.231.87.1
310.231.87.2/3210.231.87.2 – 10.231.87.210.231.87.2
410.231.87.3/3210.231.87.3 – 10.231.87.310.231.87.3
510.231.87.4/3210.231.87.4 – 10.231.87.410.231.87.4
610.231.87.5/3210.231.87.5 – 10.231.87.510.231.87.5
710.231.87.6/3210.231.87.6 – 10.231.87.610.231.87.6
810.231.87.7/3210.231.87.7 – 10.231.87.710.231.87.7
910.231.87.8/3210.231.87.8 – 10.231.87.810.231.87.8
1010.231.87.9/3210.231.87.9 – 10.231.87.910.231.87.9
1110.231.87.10/3210.231.87.10 – 10.231.87.1010.231.87.10
1210.231.87.11/3210.231.87.11 – 10.231.87.1110.231.87.11
1310.231.87.12/3210.231.87.12 – 10.231.87.1210.231.87.12
1410.231.87.13/3210.231.87.13 – 10.231.87.1310.231.87.13
1510.231.87.14/3210.231.87.14 – 10.231.87.1410.231.87.14
1610.231.87.15/3210.231.87.15 – 10.231.87.1510.231.87.15
1710.231.87.16/3210.231.87.16 – 10.231.87.1610.231.87.16
1810.231.87.17/3210.231.87.17 – 10.231.87.1710.231.87.17
1910.231.87.18/3210.231.87.18 – 10.231.87.1810.231.87.18
2010.231.87.19/3210.231.87.19 – 10.231.87.1910.231.87.19
2110.231.87.20/3210.231.87.20 – 10.231.87.2010.231.87.20
2210.231.87.21/3210.231.87.21 – 10.231.87.2110.231.87.21
2310.231.87.22/3210.231.87.22 – 10.231.87.2210.231.87.22
2410.231.87.23/3210.231.87.23 – 10.231.87.2310.231.87.23
2510.231.87.24/3210.231.87.24 – 10.231.87.2410.231.87.24
2610.231.87.25/3210.231.87.25 – 10.231.87.2510.231.87.25
2710.231.87.26/3210.231.87.26 – 10.231.87.2610.231.87.26
2810.231.87.27/3210.231.87.27 – 10.231.87.2710.231.87.27
2910.231.87.28/3210.231.87.28 – 10.231.87.2810.231.87.28
3010.231.87.29/3210.231.87.29 – 10.231.87.2910.231.87.29
3110.231.87.30/3210.231.87.30 – 10.231.87.3010.231.87.30
3210.231.87.31/3210.231.87.31 – 10.231.87.3110.231.87.31
3310.231.87.32/3210.231.87.32 – 10.231.87.3210.231.87.32
3410.231.87.33/3210.231.87.33 – 10.231.87.3310.231.87.33
3510.231.87.34/3210.231.87.34 – 10.231.87.3410.231.87.34
3610.231.87.35/3210.231.87.35 – 10.231.87.3510.231.87.35
3710.231.87.36/3210.231.87.36 – 10.231.87.3610.231.87.36
3810.231.87.37/3210.231.87.37 – 10.231.87.3710.231.87.37
3910.231.87.38/3210.231.87.38 – 10.231.87.3810.231.87.38
4010.231.87.39/3210.231.87.39 – 10.231.87.3910.231.87.39
4110.231.87.40/3210.231.87.40 – 10.231.87.4010.231.87.40
4210.231.87.41/3210.231.87.41 – 10.231.87.4110.231.87.41
4310.231.87.42/3210.231.87.42 – 10.231.87.4210.231.87.42
4410.231.87.43/3210.231.87.43 – 10.231.87.4310.231.87.43
4510.231.87.44/3210.231.87.44 – 10.231.87.4410.231.87.44
4610.231.87.45/3210.231.87.45 – 10.231.87.4510.231.87.45
4710.231.87.46/3210.231.87.46 – 10.231.87.4610.231.87.46
4810.231.87.47/3210.231.87.47 – 10.231.87.4710.231.87.47
4910.231.87.48/3210.231.87.48 – 10.231.87.4810.231.87.48
5010.231.87.49/3210.231.87.49 – 10.231.87.4910.231.87.49
5110.231.87.50/3210.231.87.50 – 10.231.87.5010.231.87.50
5210.231.87.51/3210.231.87.51 – 10.231.87.5110.231.87.51
5310.231.87.52/3210.231.87.52 – 10.231.87.5210.231.87.52
5410.231.87.53/3210.231.87.53 – 10.231.87.5310.231.87.53
5510.231.87.54/3210.231.87.54 – 10.231.87.5410.231.87.54
5610.231.87.55/3210.231.87.55 – 10.231.87.5510.231.87.55
5710.231.87.56/3210.231.87.56 – 10.231.87.5610.231.87.56
5810.231.87.57/3210.231.87.57 – 10.231.87.5710.231.87.57
5910.231.87.58/3210.231.87.58 – 10.231.87.5810.231.87.58
6010.231.87.59/3210.231.87.59 – 10.231.87.5910.231.87.59
6110.231.87.60/3210.231.87.60 – 10.231.87.6010.231.87.60
6210.231.87.61/3210.231.87.61 – 10.231.87.6110.231.87.61
6310.231.87.62/3210.231.87.62 – 10.231.87.6210.231.87.62
6410.231.87.63/3210.231.87.63 – 10.231.87.6310.231.87.63
6510.231.87.64/3210.231.87.64 – 10.231.87.6410.231.87.64
6610.231.87.65/3210.231.87.65 – 10.231.87.6510.231.87.65
6710.231.87.66/3210.231.87.66 – 10.231.87.6610.231.87.66
6810.231.87.67/3210.231.87.67 – 10.231.87.6710.231.87.67
6910.231.87.68/3210.231.87.68 – 10.231.87.6810.231.87.68
7010.231.87.69/3210.231.87.69 – 10.231.87.6910.231.87.69
7110.231.87.70/3210.231.87.70 – 10.231.87.7010.231.87.70
7210.231.87.71/3210.231.87.71 – 10.231.87.7110.231.87.71
7310.231.87.72/3210.231.87.72 – 10.231.87.7210.231.87.72
7410.231.87.73/3210.231.87.73 – 10.231.87.7310.231.87.73
7510.231.87.74/3210.231.87.74 – 10.231.87.7410.231.87.74
7610.231.87.75/3210.231.87.75 – 10.231.87.7510.231.87.75
7710.231.87.76/3210.231.87.76 – 10.231.87.7610.231.87.76
7810.231.87.77/3210.231.87.77 – 10.231.87.7710.231.87.77
7910.231.87.78/3210.231.87.78 – 10.231.87.7810.231.87.78
8010.231.87.79/3210.231.87.79 – 10.231.87.7910.231.87.79
8110.231.87.80/3210.231.87.80 – 10.231.87.8010.231.87.80
8210.231.87.81/3210.231.87.81 – 10.231.87.8110.231.87.81
8310.231.87.82/3210.231.87.82 – 10.231.87.8210.231.87.82
8410.231.87.83/3210.231.87.83 – 10.231.87.8310.231.87.83
8510.231.87.84/3210.231.87.84 – 10.231.87.8410.231.87.84
8610.231.87.85/3210.231.87.85 – 10.231.87.8510.231.87.85
8710.231.87.86/3210.231.87.86 – 10.231.87.8610.231.87.86
8810.231.87.87/3210.231.87.87 – 10.231.87.8710.231.87.87
8910.231.87.88/3210.231.87.88 – 10.231.87.8810.231.87.88
9010.231.87.89/3210.231.87.89 – 10.231.87.8910.231.87.89
9110.231.87.90/3210.231.87.90 – 10.231.87.9010.231.87.90
9210.231.87.91/3210.231.87.91 – 10.231.87.9110.231.87.91
9310.231.87.92/3210.231.87.92 – 10.231.87.9210.231.87.92
9410.231.87.93/3210.231.87.93 – 10.231.87.9310.231.87.93
9510.231.87.94/3210.231.87.94 – 10.231.87.9410.231.87.94
9610.231.87.95/3210.231.87.95 – 10.231.87.9510.231.87.95
9710.231.87.96/3210.231.87.96 – 10.231.87.9610.231.87.96
9810.231.87.97/3210.231.87.97 – 10.231.87.9710.231.87.97
9910.231.87.98/3210.231.87.98 – 10.231.87.9810.231.87.98
10010.231.87.99/3210.231.87.99 – 10.231.87.9910.231.87.99
10110.231.87.100/3210.231.87.100 – 10.231.87.10010.231.87.100
10210.231.87.101/3210.231.87.101 – 10.231.87.10110.231.87.101
10310.231.87.102/3210.231.87.102 – 10.231.87.10210.231.87.102
10410.231.87.103/3210.231.87.103 – 10.231.87.10310.231.87.103
10510.231.87.104/3210.231.87.104 – 10.231.87.10410.231.87.104
10610.231.87.105/3210.231.87.105 – 10.231.87.10510.231.87.105
10710.231.87.106/3210.231.87.106 – 10.231.87.10610.231.87.106
10810.231.87.107/3210.231.87.107 – 10.231.87.10710.231.87.107
10910.231.87.108/3210.231.87.108 – 10.231.87.10810.231.87.108
11010.231.87.109/3210.231.87.109 – 10.231.87.10910.231.87.109
11110.231.87.110/3210.231.87.110 – 10.231.87.11010.231.87.110
11210.231.87.111/3210.231.87.111 – 10.231.87.11110.231.87.111
11310.231.87.112/3210.231.87.112 – 10.231.87.11210.231.87.112
11410.231.87.113/3210.231.87.113 – 10.231.87.11310.231.87.113
11510.231.87.114/3210.231.87.114 – 10.231.87.11410.231.87.114
11610.231.87.115/3210.231.87.115 – 10.231.87.11510.231.87.115
11710.231.87.116/3210.231.87.116 – 10.231.87.11610.231.87.116
11810.231.87.117/3210.231.87.117 – 10.231.87.11710.231.87.117
11910.231.87.118/3210.231.87.118 – 10.231.87.11810.231.87.118
12010.231.87.119/3210.231.87.119 – 10.231.87.11910.231.87.119
12110.231.87.120/3210.231.87.120 – 10.231.87.12010.231.87.120
12210.231.87.121/3210.231.87.121 – 10.231.87.12110.231.87.121
12310.231.87.122/3210.231.87.122 – 10.231.87.12210.231.87.122
12410.231.87.123/3210.231.87.123 – 10.231.87.12310.231.87.123
12510.231.87.124/3210.231.87.124 – 10.231.87.12410.231.87.124
12610.231.87.125/3210.231.87.125 – 10.231.87.12510.231.87.125
12710.231.87.126/3210.231.87.126 – 10.231.87.12610.231.87.126
12810.231.87.127/3210.231.87.127 – 10.231.87.12710.231.87.127
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 →