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)10.71.7.0/25
network10.71.7.0/25
broadcast10.71.7.127
first host10.71.7.1
last host10.71.7.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.71.7.0/25
address00001010.01000111.00000111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01000111.00000111.00000000
broadcast00001010.01000111.00000111.01111111
green = network part, grey = host part
hex0x0a470700
decimal172427008
reverse dns0.7.71.10.in-addr.arpa
ipv4-mapped::ffff:a47:700

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.71.7.0/3210.71.7.0 – 10.71.7.010.71.7.0
210.71.7.1/3210.71.7.1 – 10.71.7.110.71.7.1
310.71.7.2/3210.71.7.2 – 10.71.7.210.71.7.2
410.71.7.3/3210.71.7.3 – 10.71.7.310.71.7.3
510.71.7.4/3210.71.7.4 – 10.71.7.410.71.7.4
610.71.7.5/3210.71.7.5 – 10.71.7.510.71.7.5
710.71.7.6/3210.71.7.6 – 10.71.7.610.71.7.6
810.71.7.7/3210.71.7.7 – 10.71.7.710.71.7.7
910.71.7.8/3210.71.7.8 – 10.71.7.810.71.7.8
1010.71.7.9/3210.71.7.9 – 10.71.7.910.71.7.9
1110.71.7.10/3210.71.7.10 – 10.71.7.1010.71.7.10
1210.71.7.11/3210.71.7.11 – 10.71.7.1110.71.7.11
1310.71.7.12/3210.71.7.12 – 10.71.7.1210.71.7.12
1410.71.7.13/3210.71.7.13 – 10.71.7.1310.71.7.13
1510.71.7.14/3210.71.7.14 – 10.71.7.1410.71.7.14
1610.71.7.15/3210.71.7.15 – 10.71.7.1510.71.7.15
1710.71.7.16/3210.71.7.16 – 10.71.7.1610.71.7.16
1810.71.7.17/3210.71.7.17 – 10.71.7.1710.71.7.17
1910.71.7.18/3210.71.7.18 – 10.71.7.1810.71.7.18
2010.71.7.19/3210.71.7.19 – 10.71.7.1910.71.7.19
2110.71.7.20/3210.71.7.20 – 10.71.7.2010.71.7.20
2210.71.7.21/3210.71.7.21 – 10.71.7.2110.71.7.21
2310.71.7.22/3210.71.7.22 – 10.71.7.2210.71.7.22
2410.71.7.23/3210.71.7.23 – 10.71.7.2310.71.7.23
2510.71.7.24/3210.71.7.24 – 10.71.7.2410.71.7.24
2610.71.7.25/3210.71.7.25 – 10.71.7.2510.71.7.25
2710.71.7.26/3210.71.7.26 – 10.71.7.2610.71.7.26
2810.71.7.27/3210.71.7.27 – 10.71.7.2710.71.7.27
2910.71.7.28/3210.71.7.28 – 10.71.7.2810.71.7.28
3010.71.7.29/3210.71.7.29 – 10.71.7.2910.71.7.29
3110.71.7.30/3210.71.7.30 – 10.71.7.3010.71.7.30
3210.71.7.31/3210.71.7.31 – 10.71.7.3110.71.7.31
3310.71.7.32/3210.71.7.32 – 10.71.7.3210.71.7.32
3410.71.7.33/3210.71.7.33 – 10.71.7.3310.71.7.33
3510.71.7.34/3210.71.7.34 – 10.71.7.3410.71.7.34
3610.71.7.35/3210.71.7.35 – 10.71.7.3510.71.7.35
3710.71.7.36/3210.71.7.36 – 10.71.7.3610.71.7.36
3810.71.7.37/3210.71.7.37 – 10.71.7.3710.71.7.37
3910.71.7.38/3210.71.7.38 – 10.71.7.3810.71.7.38
4010.71.7.39/3210.71.7.39 – 10.71.7.3910.71.7.39
4110.71.7.40/3210.71.7.40 – 10.71.7.4010.71.7.40
4210.71.7.41/3210.71.7.41 – 10.71.7.4110.71.7.41
4310.71.7.42/3210.71.7.42 – 10.71.7.4210.71.7.42
4410.71.7.43/3210.71.7.43 – 10.71.7.4310.71.7.43
4510.71.7.44/3210.71.7.44 – 10.71.7.4410.71.7.44
4610.71.7.45/3210.71.7.45 – 10.71.7.4510.71.7.45
4710.71.7.46/3210.71.7.46 – 10.71.7.4610.71.7.46
4810.71.7.47/3210.71.7.47 – 10.71.7.4710.71.7.47
4910.71.7.48/3210.71.7.48 – 10.71.7.4810.71.7.48
5010.71.7.49/3210.71.7.49 – 10.71.7.4910.71.7.49
5110.71.7.50/3210.71.7.50 – 10.71.7.5010.71.7.50
5210.71.7.51/3210.71.7.51 – 10.71.7.5110.71.7.51
5310.71.7.52/3210.71.7.52 – 10.71.7.5210.71.7.52
5410.71.7.53/3210.71.7.53 – 10.71.7.5310.71.7.53
5510.71.7.54/3210.71.7.54 – 10.71.7.5410.71.7.54
5610.71.7.55/3210.71.7.55 – 10.71.7.5510.71.7.55
5710.71.7.56/3210.71.7.56 – 10.71.7.5610.71.7.56
5810.71.7.57/3210.71.7.57 – 10.71.7.5710.71.7.57
5910.71.7.58/3210.71.7.58 – 10.71.7.5810.71.7.58
6010.71.7.59/3210.71.7.59 – 10.71.7.5910.71.7.59
6110.71.7.60/3210.71.7.60 – 10.71.7.6010.71.7.60
6210.71.7.61/3210.71.7.61 – 10.71.7.6110.71.7.61
6310.71.7.62/3210.71.7.62 – 10.71.7.6210.71.7.62
6410.71.7.63/3210.71.7.63 – 10.71.7.6310.71.7.63
6510.71.7.64/3210.71.7.64 – 10.71.7.6410.71.7.64
6610.71.7.65/3210.71.7.65 – 10.71.7.6510.71.7.65
6710.71.7.66/3210.71.7.66 – 10.71.7.6610.71.7.66
6810.71.7.67/3210.71.7.67 – 10.71.7.6710.71.7.67
6910.71.7.68/3210.71.7.68 – 10.71.7.6810.71.7.68
7010.71.7.69/3210.71.7.69 – 10.71.7.6910.71.7.69
7110.71.7.70/3210.71.7.70 – 10.71.7.7010.71.7.70
7210.71.7.71/3210.71.7.71 – 10.71.7.7110.71.7.71
7310.71.7.72/3210.71.7.72 – 10.71.7.7210.71.7.72
7410.71.7.73/3210.71.7.73 – 10.71.7.7310.71.7.73
7510.71.7.74/3210.71.7.74 – 10.71.7.7410.71.7.74
7610.71.7.75/3210.71.7.75 – 10.71.7.7510.71.7.75
7710.71.7.76/3210.71.7.76 – 10.71.7.7610.71.7.76
7810.71.7.77/3210.71.7.77 – 10.71.7.7710.71.7.77
7910.71.7.78/3210.71.7.78 – 10.71.7.7810.71.7.78
8010.71.7.79/3210.71.7.79 – 10.71.7.7910.71.7.79
8110.71.7.80/3210.71.7.80 – 10.71.7.8010.71.7.80
8210.71.7.81/3210.71.7.81 – 10.71.7.8110.71.7.81
8310.71.7.82/3210.71.7.82 – 10.71.7.8210.71.7.82
8410.71.7.83/3210.71.7.83 – 10.71.7.8310.71.7.83
8510.71.7.84/3210.71.7.84 – 10.71.7.8410.71.7.84
8610.71.7.85/3210.71.7.85 – 10.71.7.8510.71.7.85
8710.71.7.86/3210.71.7.86 – 10.71.7.8610.71.7.86
8810.71.7.87/3210.71.7.87 – 10.71.7.8710.71.7.87
8910.71.7.88/3210.71.7.88 – 10.71.7.8810.71.7.88
9010.71.7.89/3210.71.7.89 – 10.71.7.8910.71.7.89
9110.71.7.90/3210.71.7.90 – 10.71.7.9010.71.7.90
9210.71.7.91/3210.71.7.91 – 10.71.7.9110.71.7.91
9310.71.7.92/3210.71.7.92 – 10.71.7.9210.71.7.92
9410.71.7.93/3210.71.7.93 – 10.71.7.9310.71.7.93
9510.71.7.94/3210.71.7.94 – 10.71.7.9410.71.7.94
9610.71.7.95/3210.71.7.95 – 10.71.7.9510.71.7.95
9710.71.7.96/3210.71.7.96 – 10.71.7.9610.71.7.96
9810.71.7.97/3210.71.7.97 – 10.71.7.9710.71.7.97
9910.71.7.98/3210.71.7.98 – 10.71.7.9810.71.7.98
10010.71.7.99/3210.71.7.99 – 10.71.7.9910.71.7.99
10110.71.7.100/3210.71.7.100 – 10.71.7.10010.71.7.100
10210.71.7.101/3210.71.7.101 – 10.71.7.10110.71.7.101
10310.71.7.102/3210.71.7.102 – 10.71.7.10210.71.7.102
10410.71.7.103/3210.71.7.103 – 10.71.7.10310.71.7.103
10510.71.7.104/3210.71.7.104 – 10.71.7.10410.71.7.104
10610.71.7.105/3210.71.7.105 – 10.71.7.10510.71.7.105
10710.71.7.106/3210.71.7.106 – 10.71.7.10610.71.7.106
10810.71.7.107/3210.71.7.107 – 10.71.7.10710.71.7.107
10910.71.7.108/3210.71.7.108 – 10.71.7.10810.71.7.108
11010.71.7.109/3210.71.7.109 – 10.71.7.10910.71.7.109
11110.71.7.110/3210.71.7.110 – 10.71.7.11010.71.7.110
11210.71.7.111/3210.71.7.111 – 10.71.7.11110.71.7.111
11310.71.7.112/3210.71.7.112 – 10.71.7.11210.71.7.112
11410.71.7.113/3210.71.7.113 – 10.71.7.11310.71.7.113
11510.71.7.114/3210.71.7.114 – 10.71.7.11410.71.7.114
11610.71.7.115/3210.71.7.115 – 10.71.7.11510.71.7.115
11710.71.7.116/3210.71.7.116 – 10.71.7.11610.71.7.116
11810.71.7.117/3210.71.7.117 – 10.71.7.11710.71.7.117
11910.71.7.118/3210.71.7.118 – 10.71.7.11810.71.7.118
12010.71.7.119/3210.71.7.119 – 10.71.7.11910.71.7.119
12110.71.7.120/3210.71.7.120 – 10.71.7.12010.71.7.120
12210.71.7.121/3210.71.7.121 – 10.71.7.12110.71.7.121
12310.71.7.122/3210.71.7.122 – 10.71.7.12210.71.7.122
12410.71.7.123/3210.71.7.123 – 10.71.7.12310.71.7.123
12510.71.7.124/3210.71.7.124 – 10.71.7.12410.71.7.124
12610.71.7.125/3210.71.7.125 – 10.71.7.12510.71.7.125
12710.71.7.126/3210.71.7.126 – 10.71.7.12610.71.7.126
12810.71.7.127/3210.71.7.127 – 10.71.7.12710.71.7.127
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 →