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)10.76.40.0/25
network10.76.40.0/25
broadcast10.76.40.127
first host10.76.40.1
last host10.76.40.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.76.40.0/25
address00001010.01001100.00101000.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001100.00101000.00000000
broadcast00001010.01001100.00101000.01111111
green = network part, grey = host part
hex0x0a4c2800
decimal172763136
reverse dns0.40.76.10.in-addr.arpa
ipv4-mapped::ffff:a4c:2800

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.76.40.0/3210.76.40.0 – 10.76.40.010.76.40.0
210.76.40.1/3210.76.40.1 – 10.76.40.110.76.40.1
310.76.40.2/3210.76.40.2 – 10.76.40.210.76.40.2
410.76.40.3/3210.76.40.3 – 10.76.40.310.76.40.3
510.76.40.4/3210.76.40.4 – 10.76.40.410.76.40.4
610.76.40.5/3210.76.40.5 – 10.76.40.510.76.40.5
710.76.40.6/3210.76.40.6 – 10.76.40.610.76.40.6
810.76.40.7/3210.76.40.7 – 10.76.40.710.76.40.7
910.76.40.8/3210.76.40.8 – 10.76.40.810.76.40.8
1010.76.40.9/3210.76.40.9 – 10.76.40.910.76.40.9
1110.76.40.10/3210.76.40.10 – 10.76.40.1010.76.40.10
1210.76.40.11/3210.76.40.11 – 10.76.40.1110.76.40.11
1310.76.40.12/3210.76.40.12 – 10.76.40.1210.76.40.12
1410.76.40.13/3210.76.40.13 – 10.76.40.1310.76.40.13
1510.76.40.14/3210.76.40.14 – 10.76.40.1410.76.40.14
1610.76.40.15/3210.76.40.15 – 10.76.40.1510.76.40.15
1710.76.40.16/3210.76.40.16 – 10.76.40.1610.76.40.16
1810.76.40.17/3210.76.40.17 – 10.76.40.1710.76.40.17
1910.76.40.18/3210.76.40.18 – 10.76.40.1810.76.40.18
2010.76.40.19/3210.76.40.19 – 10.76.40.1910.76.40.19
2110.76.40.20/3210.76.40.20 – 10.76.40.2010.76.40.20
2210.76.40.21/3210.76.40.21 – 10.76.40.2110.76.40.21
2310.76.40.22/3210.76.40.22 – 10.76.40.2210.76.40.22
2410.76.40.23/3210.76.40.23 – 10.76.40.2310.76.40.23
2510.76.40.24/3210.76.40.24 – 10.76.40.2410.76.40.24
2610.76.40.25/3210.76.40.25 – 10.76.40.2510.76.40.25
2710.76.40.26/3210.76.40.26 – 10.76.40.2610.76.40.26
2810.76.40.27/3210.76.40.27 – 10.76.40.2710.76.40.27
2910.76.40.28/3210.76.40.28 – 10.76.40.2810.76.40.28
3010.76.40.29/3210.76.40.29 – 10.76.40.2910.76.40.29
3110.76.40.30/3210.76.40.30 – 10.76.40.3010.76.40.30
3210.76.40.31/3210.76.40.31 – 10.76.40.3110.76.40.31
3310.76.40.32/3210.76.40.32 – 10.76.40.3210.76.40.32
3410.76.40.33/3210.76.40.33 – 10.76.40.3310.76.40.33
3510.76.40.34/3210.76.40.34 – 10.76.40.3410.76.40.34
3610.76.40.35/3210.76.40.35 – 10.76.40.3510.76.40.35
3710.76.40.36/3210.76.40.36 – 10.76.40.3610.76.40.36
3810.76.40.37/3210.76.40.37 – 10.76.40.3710.76.40.37
3910.76.40.38/3210.76.40.38 – 10.76.40.3810.76.40.38
4010.76.40.39/3210.76.40.39 – 10.76.40.3910.76.40.39
4110.76.40.40/3210.76.40.40 – 10.76.40.4010.76.40.40
4210.76.40.41/3210.76.40.41 – 10.76.40.4110.76.40.41
4310.76.40.42/3210.76.40.42 – 10.76.40.4210.76.40.42
4410.76.40.43/3210.76.40.43 – 10.76.40.4310.76.40.43
4510.76.40.44/3210.76.40.44 – 10.76.40.4410.76.40.44
4610.76.40.45/3210.76.40.45 – 10.76.40.4510.76.40.45
4710.76.40.46/3210.76.40.46 – 10.76.40.4610.76.40.46
4810.76.40.47/3210.76.40.47 – 10.76.40.4710.76.40.47
4910.76.40.48/3210.76.40.48 – 10.76.40.4810.76.40.48
5010.76.40.49/3210.76.40.49 – 10.76.40.4910.76.40.49
5110.76.40.50/3210.76.40.50 – 10.76.40.5010.76.40.50
5210.76.40.51/3210.76.40.51 – 10.76.40.5110.76.40.51
5310.76.40.52/3210.76.40.52 – 10.76.40.5210.76.40.52
5410.76.40.53/3210.76.40.53 – 10.76.40.5310.76.40.53
5510.76.40.54/3210.76.40.54 – 10.76.40.5410.76.40.54
5610.76.40.55/3210.76.40.55 – 10.76.40.5510.76.40.55
5710.76.40.56/3210.76.40.56 – 10.76.40.5610.76.40.56
5810.76.40.57/3210.76.40.57 – 10.76.40.5710.76.40.57
5910.76.40.58/3210.76.40.58 – 10.76.40.5810.76.40.58
6010.76.40.59/3210.76.40.59 – 10.76.40.5910.76.40.59
6110.76.40.60/3210.76.40.60 – 10.76.40.6010.76.40.60
6210.76.40.61/3210.76.40.61 – 10.76.40.6110.76.40.61
6310.76.40.62/3210.76.40.62 – 10.76.40.6210.76.40.62
6410.76.40.63/3210.76.40.63 – 10.76.40.6310.76.40.63
6510.76.40.64/3210.76.40.64 – 10.76.40.6410.76.40.64
6610.76.40.65/3210.76.40.65 – 10.76.40.6510.76.40.65
6710.76.40.66/3210.76.40.66 – 10.76.40.6610.76.40.66
6810.76.40.67/3210.76.40.67 – 10.76.40.6710.76.40.67
6910.76.40.68/3210.76.40.68 – 10.76.40.6810.76.40.68
7010.76.40.69/3210.76.40.69 – 10.76.40.6910.76.40.69
7110.76.40.70/3210.76.40.70 – 10.76.40.7010.76.40.70
7210.76.40.71/3210.76.40.71 – 10.76.40.7110.76.40.71
7310.76.40.72/3210.76.40.72 – 10.76.40.7210.76.40.72
7410.76.40.73/3210.76.40.73 – 10.76.40.7310.76.40.73
7510.76.40.74/3210.76.40.74 – 10.76.40.7410.76.40.74
7610.76.40.75/3210.76.40.75 – 10.76.40.7510.76.40.75
7710.76.40.76/3210.76.40.76 – 10.76.40.7610.76.40.76
7810.76.40.77/3210.76.40.77 – 10.76.40.7710.76.40.77
7910.76.40.78/3210.76.40.78 – 10.76.40.7810.76.40.78
8010.76.40.79/3210.76.40.79 – 10.76.40.7910.76.40.79
8110.76.40.80/3210.76.40.80 – 10.76.40.8010.76.40.80
8210.76.40.81/3210.76.40.81 – 10.76.40.8110.76.40.81
8310.76.40.82/3210.76.40.82 – 10.76.40.8210.76.40.82
8410.76.40.83/3210.76.40.83 – 10.76.40.8310.76.40.83
8510.76.40.84/3210.76.40.84 – 10.76.40.8410.76.40.84
8610.76.40.85/3210.76.40.85 – 10.76.40.8510.76.40.85
8710.76.40.86/3210.76.40.86 – 10.76.40.8610.76.40.86
8810.76.40.87/3210.76.40.87 – 10.76.40.8710.76.40.87
8910.76.40.88/3210.76.40.88 – 10.76.40.8810.76.40.88
9010.76.40.89/3210.76.40.89 – 10.76.40.8910.76.40.89
9110.76.40.90/3210.76.40.90 – 10.76.40.9010.76.40.90
9210.76.40.91/3210.76.40.91 – 10.76.40.9110.76.40.91
9310.76.40.92/3210.76.40.92 – 10.76.40.9210.76.40.92
9410.76.40.93/3210.76.40.93 – 10.76.40.9310.76.40.93
9510.76.40.94/3210.76.40.94 – 10.76.40.9410.76.40.94
9610.76.40.95/3210.76.40.95 – 10.76.40.9510.76.40.95
9710.76.40.96/3210.76.40.96 – 10.76.40.9610.76.40.96
9810.76.40.97/3210.76.40.97 – 10.76.40.9710.76.40.97
9910.76.40.98/3210.76.40.98 – 10.76.40.9810.76.40.98
10010.76.40.99/3210.76.40.99 – 10.76.40.9910.76.40.99
10110.76.40.100/3210.76.40.100 – 10.76.40.10010.76.40.100
10210.76.40.101/3210.76.40.101 – 10.76.40.10110.76.40.101
10310.76.40.102/3210.76.40.102 – 10.76.40.10210.76.40.102
10410.76.40.103/3210.76.40.103 – 10.76.40.10310.76.40.103
10510.76.40.104/3210.76.40.104 – 10.76.40.10410.76.40.104
10610.76.40.105/3210.76.40.105 – 10.76.40.10510.76.40.105
10710.76.40.106/3210.76.40.106 – 10.76.40.10610.76.40.106
10810.76.40.107/3210.76.40.107 – 10.76.40.10710.76.40.107
10910.76.40.108/3210.76.40.108 – 10.76.40.10810.76.40.108
11010.76.40.109/3210.76.40.109 – 10.76.40.10910.76.40.109
11110.76.40.110/3210.76.40.110 – 10.76.40.11010.76.40.110
11210.76.40.111/3210.76.40.111 – 10.76.40.11110.76.40.111
11310.76.40.112/3210.76.40.112 – 10.76.40.11210.76.40.112
11410.76.40.113/3210.76.40.113 – 10.76.40.11310.76.40.113
11510.76.40.114/3210.76.40.114 – 10.76.40.11410.76.40.114
11610.76.40.115/3210.76.40.115 – 10.76.40.11510.76.40.115
11710.76.40.116/3210.76.40.116 – 10.76.40.11610.76.40.116
11810.76.40.117/3210.76.40.117 – 10.76.40.11710.76.40.117
11910.76.40.118/3210.76.40.118 – 10.76.40.11810.76.40.118
12010.76.40.119/3210.76.40.119 – 10.76.40.11910.76.40.119
12110.76.40.120/3210.76.40.120 – 10.76.40.12010.76.40.120
12210.76.40.121/3210.76.40.121 – 10.76.40.12110.76.40.121
12310.76.40.122/3210.76.40.122 – 10.76.40.12210.76.40.122
12410.76.40.123/3210.76.40.123 – 10.76.40.12310.76.40.123
12510.76.40.124/3210.76.40.124 – 10.76.40.12410.76.40.124
12610.76.40.125/3210.76.40.125 – 10.76.40.12510.76.40.125
12710.76.40.126/3210.76.40.126 – 10.76.40.12610.76.40.126
12810.76.40.127/3210.76.40.127 – 10.76.40.12710.76.40.127
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 →