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
private IP (RFC 1918)10.131.8.0/25
network10.131.8.0/25
broadcast10.131.8.127
first host10.131.8.1
last host10.131.8.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.131.8.0/25
address00001010.10000011.00001000.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10000011.00001000.00000000
broadcast00001010.10000011.00001000.01111111
green = network part, grey = host part
hex0x0a830800
decimal176359424
reverse dns0.8.131.10.in-addr.arpa
ipv4-mapped::ffff:a83:800

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.131.8.0/3210.131.8.0 – 10.131.8.010.131.8.0
210.131.8.1/3210.131.8.1 – 10.131.8.110.131.8.1
310.131.8.2/3210.131.8.2 – 10.131.8.210.131.8.2
410.131.8.3/3210.131.8.3 – 10.131.8.310.131.8.3
510.131.8.4/3210.131.8.4 – 10.131.8.410.131.8.4
610.131.8.5/3210.131.8.5 – 10.131.8.510.131.8.5
710.131.8.6/3210.131.8.6 – 10.131.8.610.131.8.6
810.131.8.7/3210.131.8.7 – 10.131.8.710.131.8.7
910.131.8.8/3210.131.8.8 – 10.131.8.810.131.8.8
1010.131.8.9/3210.131.8.9 – 10.131.8.910.131.8.9
1110.131.8.10/3210.131.8.10 – 10.131.8.1010.131.8.10
1210.131.8.11/3210.131.8.11 – 10.131.8.1110.131.8.11
1310.131.8.12/3210.131.8.12 – 10.131.8.1210.131.8.12
1410.131.8.13/3210.131.8.13 – 10.131.8.1310.131.8.13
1510.131.8.14/3210.131.8.14 – 10.131.8.1410.131.8.14
1610.131.8.15/3210.131.8.15 – 10.131.8.1510.131.8.15
1710.131.8.16/3210.131.8.16 – 10.131.8.1610.131.8.16
1810.131.8.17/3210.131.8.17 – 10.131.8.1710.131.8.17
1910.131.8.18/3210.131.8.18 – 10.131.8.1810.131.8.18
2010.131.8.19/3210.131.8.19 – 10.131.8.1910.131.8.19
2110.131.8.20/3210.131.8.20 – 10.131.8.2010.131.8.20
2210.131.8.21/3210.131.8.21 – 10.131.8.2110.131.8.21
2310.131.8.22/3210.131.8.22 – 10.131.8.2210.131.8.22
2410.131.8.23/3210.131.8.23 – 10.131.8.2310.131.8.23
2510.131.8.24/3210.131.8.24 – 10.131.8.2410.131.8.24
2610.131.8.25/3210.131.8.25 – 10.131.8.2510.131.8.25
2710.131.8.26/3210.131.8.26 – 10.131.8.2610.131.8.26
2810.131.8.27/3210.131.8.27 – 10.131.8.2710.131.8.27
2910.131.8.28/3210.131.8.28 – 10.131.8.2810.131.8.28
3010.131.8.29/3210.131.8.29 – 10.131.8.2910.131.8.29
3110.131.8.30/3210.131.8.30 – 10.131.8.3010.131.8.30
3210.131.8.31/3210.131.8.31 – 10.131.8.3110.131.8.31
3310.131.8.32/3210.131.8.32 – 10.131.8.3210.131.8.32
3410.131.8.33/3210.131.8.33 – 10.131.8.3310.131.8.33
3510.131.8.34/3210.131.8.34 – 10.131.8.3410.131.8.34
3610.131.8.35/3210.131.8.35 – 10.131.8.3510.131.8.35
3710.131.8.36/3210.131.8.36 – 10.131.8.3610.131.8.36
3810.131.8.37/3210.131.8.37 – 10.131.8.3710.131.8.37
3910.131.8.38/3210.131.8.38 – 10.131.8.3810.131.8.38
4010.131.8.39/3210.131.8.39 – 10.131.8.3910.131.8.39
4110.131.8.40/3210.131.8.40 – 10.131.8.4010.131.8.40
4210.131.8.41/3210.131.8.41 – 10.131.8.4110.131.8.41
4310.131.8.42/3210.131.8.42 – 10.131.8.4210.131.8.42
4410.131.8.43/3210.131.8.43 – 10.131.8.4310.131.8.43
4510.131.8.44/3210.131.8.44 – 10.131.8.4410.131.8.44
4610.131.8.45/3210.131.8.45 – 10.131.8.4510.131.8.45
4710.131.8.46/3210.131.8.46 – 10.131.8.4610.131.8.46
4810.131.8.47/3210.131.8.47 – 10.131.8.4710.131.8.47
4910.131.8.48/3210.131.8.48 – 10.131.8.4810.131.8.48
5010.131.8.49/3210.131.8.49 – 10.131.8.4910.131.8.49
5110.131.8.50/3210.131.8.50 – 10.131.8.5010.131.8.50
5210.131.8.51/3210.131.8.51 – 10.131.8.5110.131.8.51
5310.131.8.52/3210.131.8.52 – 10.131.8.5210.131.8.52
5410.131.8.53/3210.131.8.53 – 10.131.8.5310.131.8.53
5510.131.8.54/3210.131.8.54 – 10.131.8.5410.131.8.54
5610.131.8.55/3210.131.8.55 – 10.131.8.5510.131.8.55
5710.131.8.56/3210.131.8.56 – 10.131.8.5610.131.8.56
5810.131.8.57/3210.131.8.57 – 10.131.8.5710.131.8.57
5910.131.8.58/3210.131.8.58 – 10.131.8.5810.131.8.58
6010.131.8.59/3210.131.8.59 – 10.131.8.5910.131.8.59
6110.131.8.60/3210.131.8.60 – 10.131.8.6010.131.8.60
6210.131.8.61/3210.131.8.61 – 10.131.8.6110.131.8.61
6310.131.8.62/3210.131.8.62 – 10.131.8.6210.131.8.62
6410.131.8.63/3210.131.8.63 – 10.131.8.6310.131.8.63
6510.131.8.64/3210.131.8.64 – 10.131.8.6410.131.8.64
6610.131.8.65/3210.131.8.65 – 10.131.8.6510.131.8.65
6710.131.8.66/3210.131.8.66 – 10.131.8.6610.131.8.66
6810.131.8.67/3210.131.8.67 – 10.131.8.6710.131.8.67
6910.131.8.68/3210.131.8.68 – 10.131.8.6810.131.8.68
7010.131.8.69/3210.131.8.69 – 10.131.8.6910.131.8.69
7110.131.8.70/3210.131.8.70 – 10.131.8.7010.131.8.70
7210.131.8.71/3210.131.8.71 – 10.131.8.7110.131.8.71
7310.131.8.72/3210.131.8.72 – 10.131.8.7210.131.8.72
7410.131.8.73/3210.131.8.73 – 10.131.8.7310.131.8.73
7510.131.8.74/3210.131.8.74 – 10.131.8.7410.131.8.74
7610.131.8.75/3210.131.8.75 – 10.131.8.7510.131.8.75
7710.131.8.76/3210.131.8.76 – 10.131.8.7610.131.8.76
7810.131.8.77/3210.131.8.77 – 10.131.8.7710.131.8.77
7910.131.8.78/3210.131.8.78 – 10.131.8.7810.131.8.78
8010.131.8.79/3210.131.8.79 – 10.131.8.7910.131.8.79
8110.131.8.80/3210.131.8.80 – 10.131.8.8010.131.8.80
8210.131.8.81/3210.131.8.81 – 10.131.8.8110.131.8.81
8310.131.8.82/3210.131.8.82 – 10.131.8.8210.131.8.82
8410.131.8.83/3210.131.8.83 – 10.131.8.8310.131.8.83
8510.131.8.84/3210.131.8.84 – 10.131.8.8410.131.8.84
8610.131.8.85/3210.131.8.85 – 10.131.8.8510.131.8.85
8710.131.8.86/3210.131.8.86 – 10.131.8.8610.131.8.86
8810.131.8.87/3210.131.8.87 – 10.131.8.8710.131.8.87
8910.131.8.88/3210.131.8.88 – 10.131.8.8810.131.8.88
9010.131.8.89/3210.131.8.89 – 10.131.8.8910.131.8.89
9110.131.8.90/3210.131.8.90 – 10.131.8.9010.131.8.90
9210.131.8.91/3210.131.8.91 – 10.131.8.9110.131.8.91
9310.131.8.92/3210.131.8.92 – 10.131.8.9210.131.8.92
9410.131.8.93/3210.131.8.93 – 10.131.8.9310.131.8.93
9510.131.8.94/3210.131.8.94 – 10.131.8.9410.131.8.94
9610.131.8.95/3210.131.8.95 – 10.131.8.9510.131.8.95
9710.131.8.96/3210.131.8.96 – 10.131.8.9610.131.8.96
9810.131.8.97/3210.131.8.97 – 10.131.8.9710.131.8.97
9910.131.8.98/3210.131.8.98 – 10.131.8.9810.131.8.98
10010.131.8.99/3210.131.8.99 – 10.131.8.9910.131.8.99
10110.131.8.100/3210.131.8.100 – 10.131.8.10010.131.8.100
10210.131.8.101/3210.131.8.101 – 10.131.8.10110.131.8.101
10310.131.8.102/3210.131.8.102 – 10.131.8.10210.131.8.102
10410.131.8.103/3210.131.8.103 – 10.131.8.10310.131.8.103
10510.131.8.104/3210.131.8.104 – 10.131.8.10410.131.8.104
10610.131.8.105/3210.131.8.105 – 10.131.8.10510.131.8.105
10710.131.8.106/3210.131.8.106 – 10.131.8.10610.131.8.106
10810.131.8.107/3210.131.8.107 – 10.131.8.10710.131.8.107
10910.131.8.108/3210.131.8.108 – 10.131.8.10810.131.8.108
11010.131.8.109/3210.131.8.109 – 10.131.8.10910.131.8.109
11110.131.8.110/3210.131.8.110 – 10.131.8.11010.131.8.110
11210.131.8.111/3210.131.8.111 – 10.131.8.11110.131.8.111
11310.131.8.112/3210.131.8.112 – 10.131.8.11210.131.8.112
11410.131.8.113/3210.131.8.113 – 10.131.8.11310.131.8.113
11510.131.8.114/3210.131.8.114 – 10.131.8.11410.131.8.114
11610.131.8.115/3210.131.8.115 – 10.131.8.11510.131.8.115
11710.131.8.116/3210.131.8.116 – 10.131.8.11610.131.8.116
11810.131.8.117/3210.131.8.117 – 10.131.8.11710.131.8.117
11910.131.8.118/3210.131.8.118 – 10.131.8.11810.131.8.118
12010.131.8.119/3210.131.8.119 – 10.131.8.11910.131.8.119
12110.131.8.120/3210.131.8.120 – 10.131.8.12010.131.8.120
12210.131.8.121/3210.131.8.121 – 10.131.8.12110.131.8.121
12310.131.8.122/3210.131.8.122 – 10.131.8.12210.131.8.122
12410.131.8.123/3210.131.8.123 – 10.131.8.12310.131.8.123
12510.131.8.124/3210.131.8.124 – 10.131.8.12410.131.8.124
12610.131.8.125/3210.131.8.125 – 10.131.8.12510.131.8.125
12710.131.8.126/3210.131.8.126 – 10.131.8.12610.131.8.126
12810.131.8.127/3210.131.8.127 – 10.131.8.12710.131.8.127
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 →