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)10.71.111.0/25
network10.71.111.0/25
broadcast10.71.111.127
first host10.71.111.1
last host10.71.111.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.71.111.0/25
address00001010.01000111.01101111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01000111.01101111.00000000
broadcast00001010.01000111.01101111.01111111
green = network part, grey = host part
hex0x0a476f00
decimal172453632
reverse dns0.111.71.10.in-addr.arpa
ipv4-mapped::ffff:a47:6f00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.71.111.0/3210.71.111.0 – 10.71.111.010.71.111.0
210.71.111.1/3210.71.111.1 – 10.71.111.110.71.111.1
310.71.111.2/3210.71.111.2 – 10.71.111.210.71.111.2
410.71.111.3/3210.71.111.3 – 10.71.111.310.71.111.3
510.71.111.4/3210.71.111.4 – 10.71.111.410.71.111.4
610.71.111.5/3210.71.111.5 – 10.71.111.510.71.111.5
710.71.111.6/3210.71.111.6 – 10.71.111.610.71.111.6
810.71.111.7/3210.71.111.7 – 10.71.111.710.71.111.7
910.71.111.8/3210.71.111.8 – 10.71.111.810.71.111.8
1010.71.111.9/3210.71.111.9 – 10.71.111.910.71.111.9
1110.71.111.10/3210.71.111.10 – 10.71.111.1010.71.111.10
1210.71.111.11/3210.71.111.11 – 10.71.111.1110.71.111.11
1310.71.111.12/3210.71.111.12 – 10.71.111.1210.71.111.12
1410.71.111.13/3210.71.111.13 – 10.71.111.1310.71.111.13
1510.71.111.14/3210.71.111.14 – 10.71.111.1410.71.111.14
1610.71.111.15/3210.71.111.15 – 10.71.111.1510.71.111.15
1710.71.111.16/3210.71.111.16 – 10.71.111.1610.71.111.16
1810.71.111.17/3210.71.111.17 – 10.71.111.1710.71.111.17
1910.71.111.18/3210.71.111.18 – 10.71.111.1810.71.111.18
2010.71.111.19/3210.71.111.19 – 10.71.111.1910.71.111.19
2110.71.111.20/3210.71.111.20 – 10.71.111.2010.71.111.20
2210.71.111.21/3210.71.111.21 – 10.71.111.2110.71.111.21
2310.71.111.22/3210.71.111.22 – 10.71.111.2210.71.111.22
2410.71.111.23/3210.71.111.23 – 10.71.111.2310.71.111.23
2510.71.111.24/3210.71.111.24 – 10.71.111.2410.71.111.24
2610.71.111.25/3210.71.111.25 – 10.71.111.2510.71.111.25
2710.71.111.26/3210.71.111.26 – 10.71.111.2610.71.111.26
2810.71.111.27/3210.71.111.27 – 10.71.111.2710.71.111.27
2910.71.111.28/3210.71.111.28 – 10.71.111.2810.71.111.28
3010.71.111.29/3210.71.111.29 – 10.71.111.2910.71.111.29
3110.71.111.30/3210.71.111.30 – 10.71.111.3010.71.111.30
3210.71.111.31/3210.71.111.31 – 10.71.111.3110.71.111.31
3310.71.111.32/3210.71.111.32 – 10.71.111.3210.71.111.32
3410.71.111.33/3210.71.111.33 – 10.71.111.3310.71.111.33
3510.71.111.34/3210.71.111.34 – 10.71.111.3410.71.111.34
3610.71.111.35/3210.71.111.35 – 10.71.111.3510.71.111.35
3710.71.111.36/3210.71.111.36 – 10.71.111.3610.71.111.36
3810.71.111.37/3210.71.111.37 – 10.71.111.3710.71.111.37
3910.71.111.38/3210.71.111.38 – 10.71.111.3810.71.111.38
4010.71.111.39/3210.71.111.39 – 10.71.111.3910.71.111.39
4110.71.111.40/3210.71.111.40 – 10.71.111.4010.71.111.40
4210.71.111.41/3210.71.111.41 – 10.71.111.4110.71.111.41
4310.71.111.42/3210.71.111.42 – 10.71.111.4210.71.111.42
4410.71.111.43/3210.71.111.43 – 10.71.111.4310.71.111.43
4510.71.111.44/3210.71.111.44 – 10.71.111.4410.71.111.44
4610.71.111.45/3210.71.111.45 – 10.71.111.4510.71.111.45
4710.71.111.46/3210.71.111.46 – 10.71.111.4610.71.111.46
4810.71.111.47/3210.71.111.47 – 10.71.111.4710.71.111.47
4910.71.111.48/3210.71.111.48 – 10.71.111.4810.71.111.48
5010.71.111.49/3210.71.111.49 – 10.71.111.4910.71.111.49
5110.71.111.50/3210.71.111.50 – 10.71.111.5010.71.111.50
5210.71.111.51/3210.71.111.51 – 10.71.111.5110.71.111.51
5310.71.111.52/3210.71.111.52 – 10.71.111.5210.71.111.52
5410.71.111.53/3210.71.111.53 – 10.71.111.5310.71.111.53
5510.71.111.54/3210.71.111.54 – 10.71.111.5410.71.111.54
5610.71.111.55/3210.71.111.55 – 10.71.111.5510.71.111.55
5710.71.111.56/3210.71.111.56 – 10.71.111.5610.71.111.56
5810.71.111.57/3210.71.111.57 – 10.71.111.5710.71.111.57
5910.71.111.58/3210.71.111.58 – 10.71.111.5810.71.111.58
6010.71.111.59/3210.71.111.59 – 10.71.111.5910.71.111.59
6110.71.111.60/3210.71.111.60 – 10.71.111.6010.71.111.60
6210.71.111.61/3210.71.111.61 – 10.71.111.6110.71.111.61
6310.71.111.62/3210.71.111.62 – 10.71.111.6210.71.111.62
6410.71.111.63/3210.71.111.63 – 10.71.111.6310.71.111.63
6510.71.111.64/3210.71.111.64 – 10.71.111.6410.71.111.64
6610.71.111.65/3210.71.111.65 – 10.71.111.6510.71.111.65
6710.71.111.66/3210.71.111.66 – 10.71.111.6610.71.111.66
6810.71.111.67/3210.71.111.67 – 10.71.111.6710.71.111.67
6910.71.111.68/3210.71.111.68 – 10.71.111.6810.71.111.68
7010.71.111.69/3210.71.111.69 – 10.71.111.6910.71.111.69
7110.71.111.70/3210.71.111.70 – 10.71.111.7010.71.111.70
7210.71.111.71/3210.71.111.71 – 10.71.111.7110.71.111.71
7310.71.111.72/3210.71.111.72 – 10.71.111.7210.71.111.72
7410.71.111.73/3210.71.111.73 – 10.71.111.7310.71.111.73
7510.71.111.74/3210.71.111.74 – 10.71.111.7410.71.111.74
7610.71.111.75/3210.71.111.75 – 10.71.111.7510.71.111.75
7710.71.111.76/3210.71.111.76 – 10.71.111.7610.71.111.76
7810.71.111.77/3210.71.111.77 – 10.71.111.7710.71.111.77
7910.71.111.78/3210.71.111.78 – 10.71.111.7810.71.111.78
8010.71.111.79/3210.71.111.79 – 10.71.111.7910.71.111.79
8110.71.111.80/3210.71.111.80 – 10.71.111.8010.71.111.80
8210.71.111.81/3210.71.111.81 – 10.71.111.8110.71.111.81
8310.71.111.82/3210.71.111.82 – 10.71.111.8210.71.111.82
8410.71.111.83/3210.71.111.83 – 10.71.111.8310.71.111.83
8510.71.111.84/3210.71.111.84 – 10.71.111.8410.71.111.84
8610.71.111.85/3210.71.111.85 – 10.71.111.8510.71.111.85
8710.71.111.86/3210.71.111.86 – 10.71.111.8610.71.111.86
8810.71.111.87/3210.71.111.87 – 10.71.111.8710.71.111.87
8910.71.111.88/3210.71.111.88 – 10.71.111.8810.71.111.88
9010.71.111.89/3210.71.111.89 – 10.71.111.8910.71.111.89
9110.71.111.90/3210.71.111.90 – 10.71.111.9010.71.111.90
9210.71.111.91/3210.71.111.91 – 10.71.111.9110.71.111.91
9310.71.111.92/3210.71.111.92 – 10.71.111.9210.71.111.92
9410.71.111.93/3210.71.111.93 – 10.71.111.9310.71.111.93
9510.71.111.94/3210.71.111.94 – 10.71.111.9410.71.111.94
9610.71.111.95/3210.71.111.95 – 10.71.111.9510.71.111.95
9710.71.111.96/3210.71.111.96 – 10.71.111.9610.71.111.96
9810.71.111.97/3210.71.111.97 – 10.71.111.9710.71.111.97
9910.71.111.98/3210.71.111.98 – 10.71.111.9810.71.111.98
10010.71.111.99/3210.71.111.99 – 10.71.111.9910.71.111.99
10110.71.111.100/3210.71.111.100 – 10.71.111.10010.71.111.100
10210.71.111.101/3210.71.111.101 – 10.71.111.10110.71.111.101
10310.71.111.102/3210.71.111.102 – 10.71.111.10210.71.111.102
10410.71.111.103/3210.71.111.103 – 10.71.111.10310.71.111.103
10510.71.111.104/3210.71.111.104 – 10.71.111.10410.71.111.104
10610.71.111.105/3210.71.111.105 – 10.71.111.10510.71.111.105
10710.71.111.106/3210.71.111.106 – 10.71.111.10610.71.111.106
10810.71.111.107/3210.71.111.107 – 10.71.111.10710.71.111.107
10910.71.111.108/3210.71.111.108 – 10.71.111.10810.71.111.108
11010.71.111.109/3210.71.111.109 – 10.71.111.10910.71.111.109
11110.71.111.110/3210.71.111.110 – 10.71.111.11010.71.111.110
11210.71.111.111/3210.71.111.111 – 10.71.111.11110.71.111.111
11310.71.111.112/3210.71.111.112 – 10.71.111.11210.71.111.112
11410.71.111.113/3210.71.111.113 – 10.71.111.11310.71.111.113
11510.71.111.114/3210.71.111.114 – 10.71.111.11410.71.111.114
11610.71.111.115/3210.71.111.115 – 10.71.111.11510.71.111.115
11710.71.111.116/3210.71.111.116 – 10.71.111.11610.71.111.116
11810.71.111.117/3210.71.111.117 – 10.71.111.11710.71.111.117
11910.71.111.118/3210.71.111.118 – 10.71.111.11810.71.111.118
12010.71.111.119/3210.71.111.119 – 10.71.111.11910.71.111.119
12110.71.111.120/3210.71.111.120 – 10.71.111.12010.71.111.120
12210.71.111.121/3210.71.111.121 – 10.71.111.12110.71.111.121
12310.71.111.122/3210.71.111.122 – 10.71.111.12210.71.111.122
12410.71.111.123/3210.71.111.123 – 10.71.111.12310.71.111.123
12510.71.111.124/3210.71.111.124 – 10.71.111.12410.71.111.124
12610.71.111.125/3210.71.111.125 – 10.71.111.12510.71.111.125
12710.71.111.126/3210.71.111.126 – 10.71.111.12610.71.111.126
12810.71.111.127/3210.71.111.127 – 10.71.111.12710.71.111.127
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 →