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)10.71.232.0/25
network10.71.232.0/25
broadcast10.71.232.127
first host10.71.232.1
last host10.71.232.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.71.232.0/25
address00001010.01000111.11101000.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01000111.11101000.00000000
broadcast00001010.01000111.11101000.01111111
green = network part, grey = host part
hex0x0a47e800
decimal172484608
reverse dns0.232.71.10.in-addr.arpa
ipv4-mapped::ffff:a47:e800

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.71.232.0/3210.71.232.0 – 10.71.232.010.71.232.0
210.71.232.1/3210.71.232.1 – 10.71.232.110.71.232.1
310.71.232.2/3210.71.232.2 – 10.71.232.210.71.232.2
410.71.232.3/3210.71.232.3 – 10.71.232.310.71.232.3
510.71.232.4/3210.71.232.4 – 10.71.232.410.71.232.4
610.71.232.5/3210.71.232.5 – 10.71.232.510.71.232.5
710.71.232.6/3210.71.232.6 – 10.71.232.610.71.232.6
810.71.232.7/3210.71.232.7 – 10.71.232.710.71.232.7
910.71.232.8/3210.71.232.8 – 10.71.232.810.71.232.8
1010.71.232.9/3210.71.232.9 – 10.71.232.910.71.232.9
1110.71.232.10/3210.71.232.10 – 10.71.232.1010.71.232.10
1210.71.232.11/3210.71.232.11 – 10.71.232.1110.71.232.11
1310.71.232.12/3210.71.232.12 – 10.71.232.1210.71.232.12
1410.71.232.13/3210.71.232.13 – 10.71.232.1310.71.232.13
1510.71.232.14/3210.71.232.14 – 10.71.232.1410.71.232.14
1610.71.232.15/3210.71.232.15 – 10.71.232.1510.71.232.15
1710.71.232.16/3210.71.232.16 – 10.71.232.1610.71.232.16
1810.71.232.17/3210.71.232.17 – 10.71.232.1710.71.232.17
1910.71.232.18/3210.71.232.18 – 10.71.232.1810.71.232.18
2010.71.232.19/3210.71.232.19 – 10.71.232.1910.71.232.19
2110.71.232.20/3210.71.232.20 – 10.71.232.2010.71.232.20
2210.71.232.21/3210.71.232.21 – 10.71.232.2110.71.232.21
2310.71.232.22/3210.71.232.22 – 10.71.232.2210.71.232.22
2410.71.232.23/3210.71.232.23 – 10.71.232.2310.71.232.23
2510.71.232.24/3210.71.232.24 – 10.71.232.2410.71.232.24
2610.71.232.25/3210.71.232.25 – 10.71.232.2510.71.232.25
2710.71.232.26/3210.71.232.26 – 10.71.232.2610.71.232.26
2810.71.232.27/3210.71.232.27 – 10.71.232.2710.71.232.27
2910.71.232.28/3210.71.232.28 – 10.71.232.2810.71.232.28
3010.71.232.29/3210.71.232.29 – 10.71.232.2910.71.232.29
3110.71.232.30/3210.71.232.30 – 10.71.232.3010.71.232.30
3210.71.232.31/3210.71.232.31 – 10.71.232.3110.71.232.31
3310.71.232.32/3210.71.232.32 – 10.71.232.3210.71.232.32
3410.71.232.33/3210.71.232.33 – 10.71.232.3310.71.232.33
3510.71.232.34/3210.71.232.34 – 10.71.232.3410.71.232.34
3610.71.232.35/3210.71.232.35 – 10.71.232.3510.71.232.35
3710.71.232.36/3210.71.232.36 – 10.71.232.3610.71.232.36
3810.71.232.37/3210.71.232.37 – 10.71.232.3710.71.232.37
3910.71.232.38/3210.71.232.38 – 10.71.232.3810.71.232.38
4010.71.232.39/3210.71.232.39 – 10.71.232.3910.71.232.39
4110.71.232.40/3210.71.232.40 – 10.71.232.4010.71.232.40
4210.71.232.41/3210.71.232.41 – 10.71.232.4110.71.232.41
4310.71.232.42/3210.71.232.42 – 10.71.232.4210.71.232.42
4410.71.232.43/3210.71.232.43 – 10.71.232.4310.71.232.43
4510.71.232.44/3210.71.232.44 – 10.71.232.4410.71.232.44
4610.71.232.45/3210.71.232.45 – 10.71.232.4510.71.232.45
4710.71.232.46/3210.71.232.46 – 10.71.232.4610.71.232.46
4810.71.232.47/3210.71.232.47 – 10.71.232.4710.71.232.47
4910.71.232.48/3210.71.232.48 – 10.71.232.4810.71.232.48
5010.71.232.49/3210.71.232.49 – 10.71.232.4910.71.232.49
5110.71.232.50/3210.71.232.50 – 10.71.232.5010.71.232.50
5210.71.232.51/3210.71.232.51 – 10.71.232.5110.71.232.51
5310.71.232.52/3210.71.232.52 – 10.71.232.5210.71.232.52
5410.71.232.53/3210.71.232.53 – 10.71.232.5310.71.232.53
5510.71.232.54/3210.71.232.54 – 10.71.232.5410.71.232.54
5610.71.232.55/3210.71.232.55 – 10.71.232.5510.71.232.55
5710.71.232.56/3210.71.232.56 – 10.71.232.5610.71.232.56
5810.71.232.57/3210.71.232.57 – 10.71.232.5710.71.232.57
5910.71.232.58/3210.71.232.58 – 10.71.232.5810.71.232.58
6010.71.232.59/3210.71.232.59 – 10.71.232.5910.71.232.59
6110.71.232.60/3210.71.232.60 – 10.71.232.6010.71.232.60
6210.71.232.61/3210.71.232.61 – 10.71.232.6110.71.232.61
6310.71.232.62/3210.71.232.62 – 10.71.232.6210.71.232.62
6410.71.232.63/3210.71.232.63 – 10.71.232.6310.71.232.63
6510.71.232.64/3210.71.232.64 – 10.71.232.6410.71.232.64
6610.71.232.65/3210.71.232.65 – 10.71.232.6510.71.232.65
6710.71.232.66/3210.71.232.66 – 10.71.232.6610.71.232.66
6810.71.232.67/3210.71.232.67 – 10.71.232.6710.71.232.67
6910.71.232.68/3210.71.232.68 – 10.71.232.6810.71.232.68
7010.71.232.69/3210.71.232.69 – 10.71.232.6910.71.232.69
7110.71.232.70/3210.71.232.70 – 10.71.232.7010.71.232.70
7210.71.232.71/3210.71.232.71 – 10.71.232.7110.71.232.71
7310.71.232.72/3210.71.232.72 – 10.71.232.7210.71.232.72
7410.71.232.73/3210.71.232.73 – 10.71.232.7310.71.232.73
7510.71.232.74/3210.71.232.74 – 10.71.232.7410.71.232.74
7610.71.232.75/3210.71.232.75 – 10.71.232.7510.71.232.75
7710.71.232.76/3210.71.232.76 – 10.71.232.7610.71.232.76
7810.71.232.77/3210.71.232.77 – 10.71.232.7710.71.232.77
7910.71.232.78/3210.71.232.78 – 10.71.232.7810.71.232.78
8010.71.232.79/3210.71.232.79 – 10.71.232.7910.71.232.79
8110.71.232.80/3210.71.232.80 – 10.71.232.8010.71.232.80
8210.71.232.81/3210.71.232.81 – 10.71.232.8110.71.232.81
8310.71.232.82/3210.71.232.82 – 10.71.232.8210.71.232.82
8410.71.232.83/3210.71.232.83 – 10.71.232.8310.71.232.83
8510.71.232.84/3210.71.232.84 – 10.71.232.8410.71.232.84
8610.71.232.85/3210.71.232.85 – 10.71.232.8510.71.232.85
8710.71.232.86/3210.71.232.86 – 10.71.232.8610.71.232.86
8810.71.232.87/3210.71.232.87 – 10.71.232.8710.71.232.87
8910.71.232.88/3210.71.232.88 – 10.71.232.8810.71.232.88
9010.71.232.89/3210.71.232.89 – 10.71.232.8910.71.232.89
9110.71.232.90/3210.71.232.90 – 10.71.232.9010.71.232.90
9210.71.232.91/3210.71.232.91 – 10.71.232.9110.71.232.91
9310.71.232.92/3210.71.232.92 – 10.71.232.9210.71.232.92
9410.71.232.93/3210.71.232.93 – 10.71.232.9310.71.232.93
9510.71.232.94/3210.71.232.94 – 10.71.232.9410.71.232.94
9610.71.232.95/3210.71.232.95 – 10.71.232.9510.71.232.95
9710.71.232.96/3210.71.232.96 – 10.71.232.9610.71.232.96
9810.71.232.97/3210.71.232.97 – 10.71.232.9710.71.232.97
9910.71.232.98/3210.71.232.98 – 10.71.232.9810.71.232.98
10010.71.232.99/3210.71.232.99 – 10.71.232.9910.71.232.99
10110.71.232.100/3210.71.232.100 – 10.71.232.10010.71.232.100
10210.71.232.101/3210.71.232.101 – 10.71.232.10110.71.232.101
10310.71.232.102/3210.71.232.102 – 10.71.232.10210.71.232.102
10410.71.232.103/3210.71.232.103 – 10.71.232.10310.71.232.103
10510.71.232.104/3210.71.232.104 – 10.71.232.10410.71.232.104
10610.71.232.105/3210.71.232.105 – 10.71.232.10510.71.232.105
10710.71.232.106/3210.71.232.106 – 10.71.232.10610.71.232.106
10810.71.232.107/3210.71.232.107 – 10.71.232.10710.71.232.107
10910.71.232.108/3210.71.232.108 – 10.71.232.10810.71.232.108
11010.71.232.109/3210.71.232.109 – 10.71.232.10910.71.232.109
11110.71.232.110/3210.71.232.110 – 10.71.232.11010.71.232.110
11210.71.232.111/3210.71.232.111 – 10.71.232.11110.71.232.111
11310.71.232.112/3210.71.232.112 – 10.71.232.11210.71.232.112
11410.71.232.113/3210.71.232.113 – 10.71.232.11310.71.232.113
11510.71.232.114/3210.71.232.114 – 10.71.232.11410.71.232.114
11610.71.232.115/3210.71.232.115 – 10.71.232.11510.71.232.115
11710.71.232.116/3210.71.232.116 – 10.71.232.11610.71.232.116
11810.71.232.117/3210.71.232.117 – 10.71.232.11710.71.232.117
11910.71.232.118/3210.71.232.118 – 10.71.232.11810.71.232.118
12010.71.232.119/3210.71.232.119 – 10.71.232.11910.71.232.119
12110.71.232.120/3210.71.232.120 – 10.71.232.12010.71.232.120
12210.71.232.121/3210.71.232.121 – 10.71.232.12110.71.232.121
12310.71.232.122/3210.71.232.122 – 10.71.232.12210.71.232.122
12410.71.232.123/3210.71.232.123 – 10.71.232.12310.71.232.123
12510.71.232.124/3210.71.232.124 – 10.71.232.12410.71.232.124
12610.71.232.125/3210.71.232.125 – 10.71.232.12510.71.232.125
12710.71.232.126/3210.71.232.126 – 10.71.232.12610.71.232.126
12810.71.232.127/3210.71.232.127 – 10.71.232.12710.71.232.127
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 →