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)10.76.255.0/25
network10.76.255.0/25
broadcast10.76.255.127
first host10.76.255.1
last host10.76.255.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.76.255.0/25
address00001010.01001100.11111111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001100.11111111.00000000
broadcast00001010.01001100.11111111.01111111
green = network part, grey = host part
hex0x0a4cff00
decimal172818176
reverse dns0.255.76.10.in-addr.arpa
ipv4-mapped::ffff:a4c:ff00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.76.255.0/3210.76.255.0 – 10.76.255.010.76.255.0
210.76.255.1/3210.76.255.1 – 10.76.255.110.76.255.1
310.76.255.2/3210.76.255.2 – 10.76.255.210.76.255.2
410.76.255.3/3210.76.255.3 – 10.76.255.310.76.255.3
510.76.255.4/3210.76.255.4 – 10.76.255.410.76.255.4
610.76.255.5/3210.76.255.5 – 10.76.255.510.76.255.5
710.76.255.6/3210.76.255.6 – 10.76.255.610.76.255.6
810.76.255.7/3210.76.255.7 – 10.76.255.710.76.255.7
910.76.255.8/3210.76.255.8 – 10.76.255.810.76.255.8
1010.76.255.9/3210.76.255.9 – 10.76.255.910.76.255.9
1110.76.255.10/3210.76.255.10 – 10.76.255.1010.76.255.10
1210.76.255.11/3210.76.255.11 – 10.76.255.1110.76.255.11
1310.76.255.12/3210.76.255.12 – 10.76.255.1210.76.255.12
1410.76.255.13/3210.76.255.13 – 10.76.255.1310.76.255.13
1510.76.255.14/3210.76.255.14 – 10.76.255.1410.76.255.14
1610.76.255.15/3210.76.255.15 – 10.76.255.1510.76.255.15
1710.76.255.16/3210.76.255.16 – 10.76.255.1610.76.255.16
1810.76.255.17/3210.76.255.17 – 10.76.255.1710.76.255.17
1910.76.255.18/3210.76.255.18 – 10.76.255.1810.76.255.18
2010.76.255.19/3210.76.255.19 – 10.76.255.1910.76.255.19
2110.76.255.20/3210.76.255.20 – 10.76.255.2010.76.255.20
2210.76.255.21/3210.76.255.21 – 10.76.255.2110.76.255.21
2310.76.255.22/3210.76.255.22 – 10.76.255.2210.76.255.22
2410.76.255.23/3210.76.255.23 – 10.76.255.2310.76.255.23
2510.76.255.24/3210.76.255.24 – 10.76.255.2410.76.255.24
2610.76.255.25/3210.76.255.25 – 10.76.255.2510.76.255.25
2710.76.255.26/3210.76.255.26 – 10.76.255.2610.76.255.26
2810.76.255.27/3210.76.255.27 – 10.76.255.2710.76.255.27
2910.76.255.28/3210.76.255.28 – 10.76.255.2810.76.255.28
3010.76.255.29/3210.76.255.29 – 10.76.255.2910.76.255.29
3110.76.255.30/3210.76.255.30 – 10.76.255.3010.76.255.30
3210.76.255.31/3210.76.255.31 – 10.76.255.3110.76.255.31
3310.76.255.32/3210.76.255.32 – 10.76.255.3210.76.255.32
3410.76.255.33/3210.76.255.33 – 10.76.255.3310.76.255.33
3510.76.255.34/3210.76.255.34 – 10.76.255.3410.76.255.34
3610.76.255.35/3210.76.255.35 – 10.76.255.3510.76.255.35
3710.76.255.36/3210.76.255.36 – 10.76.255.3610.76.255.36
3810.76.255.37/3210.76.255.37 – 10.76.255.3710.76.255.37
3910.76.255.38/3210.76.255.38 – 10.76.255.3810.76.255.38
4010.76.255.39/3210.76.255.39 – 10.76.255.3910.76.255.39
4110.76.255.40/3210.76.255.40 – 10.76.255.4010.76.255.40
4210.76.255.41/3210.76.255.41 – 10.76.255.4110.76.255.41
4310.76.255.42/3210.76.255.42 – 10.76.255.4210.76.255.42
4410.76.255.43/3210.76.255.43 – 10.76.255.4310.76.255.43
4510.76.255.44/3210.76.255.44 – 10.76.255.4410.76.255.44
4610.76.255.45/3210.76.255.45 – 10.76.255.4510.76.255.45
4710.76.255.46/3210.76.255.46 – 10.76.255.4610.76.255.46
4810.76.255.47/3210.76.255.47 – 10.76.255.4710.76.255.47
4910.76.255.48/3210.76.255.48 – 10.76.255.4810.76.255.48
5010.76.255.49/3210.76.255.49 – 10.76.255.4910.76.255.49
5110.76.255.50/3210.76.255.50 – 10.76.255.5010.76.255.50
5210.76.255.51/3210.76.255.51 – 10.76.255.5110.76.255.51
5310.76.255.52/3210.76.255.52 – 10.76.255.5210.76.255.52
5410.76.255.53/3210.76.255.53 – 10.76.255.5310.76.255.53
5510.76.255.54/3210.76.255.54 – 10.76.255.5410.76.255.54
5610.76.255.55/3210.76.255.55 – 10.76.255.5510.76.255.55
5710.76.255.56/3210.76.255.56 – 10.76.255.5610.76.255.56
5810.76.255.57/3210.76.255.57 – 10.76.255.5710.76.255.57
5910.76.255.58/3210.76.255.58 – 10.76.255.5810.76.255.58
6010.76.255.59/3210.76.255.59 – 10.76.255.5910.76.255.59
6110.76.255.60/3210.76.255.60 – 10.76.255.6010.76.255.60
6210.76.255.61/3210.76.255.61 – 10.76.255.6110.76.255.61
6310.76.255.62/3210.76.255.62 – 10.76.255.6210.76.255.62
6410.76.255.63/3210.76.255.63 – 10.76.255.6310.76.255.63
6510.76.255.64/3210.76.255.64 – 10.76.255.6410.76.255.64
6610.76.255.65/3210.76.255.65 – 10.76.255.6510.76.255.65
6710.76.255.66/3210.76.255.66 – 10.76.255.6610.76.255.66
6810.76.255.67/3210.76.255.67 – 10.76.255.6710.76.255.67
6910.76.255.68/3210.76.255.68 – 10.76.255.6810.76.255.68
7010.76.255.69/3210.76.255.69 – 10.76.255.6910.76.255.69
7110.76.255.70/3210.76.255.70 – 10.76.255.7010.76.255.70
7210.76.255.71/3210.76.255.71 – 10.76.255.7110.76.255.71
7310.76.255.72/3210.76.255.72 – 10.76.255.7210.76.255.72
7410.76.255.73/3210.76.255.73 – 10.76.255.7310.76.255.73
7510.76.255.74/3210.76.255.74 – 10.76.255.7410.76.255.74
7610.76.255.75/3210.76.255.75 – 10.76.255.7510.76.255.75
7710.76.255.76/3210.76.255.76 – 10.76.255.7610.76.255.76
7810.76.255.77/3210.76.255.77 – 10.76.255.7710.76.255.77
7910.76.255.78/3210.76.255.78 – 10.76.255.7810.76.255.78
8010.76.255.79/3210.76.255.79 – 10.76.255.7910.76.255.79
8110.76.255.80/3210.76.255.80 – 10.76.255.8010.76.255.80
8210.76.255.81/3210.76.255.81 – 10.76.255.8110.76.255.81
8310.76.255.82/3210.76.255.82 – 10.76.255.8210.76.255.82
8410.76.255.83/3210.76.255.83 – 10.76.255.8310.76.255.83
8510.76.255.84/3210.76.255.84 – 10.76.255.8410.76.255.84
8610.76.255.85/3210.76.255.85 – 10.76.255.8510.76.255.85
8710.76.255.86/3210.76.255.86 – 10.76.255.8610.76.255.86
8810.76.255.87/3210.76.255.87 – 10.76.255.8710.76.255.87
8910.76.255.88/3210.76.255.88 – 10.76.255.8810.76.255.88
9010.76.255.89/3210.76.255.89 – 10.76.255.8910.76.255.89
9110.76.255.90/3210.76.255.90 – 10.76.255.9010.76.255.90
9210.76.255.91/3210.76.255.91 – 10.76.255.9110.76.255.91
9310.76.255.92/3210.76.255.92 – 10.76.255.9210.76.255.92
9410.76.255.93/3210.76.255.93 – 10.76.255.9310.76.255.93
9510.76.255.94/3210.76.255.94 – 10.76.255.9410.76.255.94
9610.76.255.95/3210.76.255.95 – 10.76.255.9510.76.255.95
9710.76.255.96/3210.76.255.96 – 10.76.255.9610.76.255.96
9810.76.255.97/3210.76.255.97 – 10.76.255.9710.76.255.97
9910.76.255.98/3210.76.255.98 – 10.76.255.9810.76.255.98
10010.76.255.99/3210.76.255.99 – 10.76.255.9910.76.255.99
10110.76.255.100/3210.76.255.100 – 10.76.255.10010.76.255.100
10210.76.255.101/3210.76.255.101 – 10.76.255.10110.76.255.101
10310.76.255.102/3210.76.255.102 – 10.76.255.10210.76.255.102
10410.76.255.103/3210.76.255.103 – 10.76.255.10310.76.255.103
10510.76.255.104/3210.76.255.104 – 10.76.255.10410.76.255.104
10610.76.255.105/3210.76.255.105 – 10.76.255.10510.76.255.105
10710.76.255.106/3210.76.255.106 – 10.76.255.10610.76.255.106
10810.76.255.107/3210.76.255.107 – 10.76.255.10710.76.255.107
10910.76.255.108/3210.76.255.108 – 10.76.255.10810.76.255.108
11010.76.255.109/3210.76.255.109 – 10.76.255.10910.76.255.109
11110.76.255.110/3210.76.255.110 – 10.76.255.11010.76.255.110
11210.76.255.111/3210.76.255.111 – 10.76.255.11110.76.255.111
11310.76.255.112/3210.76.255.112 – 10.76.255.11210.76.255.112
11410.76.255.113/3210.76.255.113 – 10.76.255.11310.76.255.113
11510.76.255.114/3210.76.255.114 – 10.76.255.11410.76.255.114
11610.76.255.115/3210.76.255.115 – 10.76.255.11510.76.255.115
11710.76.255.116/3210.76.255.116 – 10.76.255.11610.76.255.116
11810.76.255.117/3210.76.255.117 – 10.76.255.11710.76.255.117
11910.76.255.118/3210.76.255.118 – 10.76.255.11810.76.255.118
12010.76.255.119/3210.76.255.119 – 10.76.255.11910.76.255.119
12110.76.255.120/3210.76.255.120 – 10.76.255.12010.76.255.120
12210.76.255.121/3210.76.255.121 – 10.76.255.12110.76.255.121
12310.76.255.122/3210.76.255.122 – 10.76.255.12210.76.255.122
12410.76.255.123/3210.76.255.123 – 10.76.255.12310.76.255.123
12510.76.255.124/3210.76.255.124 – 10.76.255.12410.76.255.124
12610.76.255.125/3210.76.255.125 – 10.76.255.12510.76.255.125
12710.76.255.126/3210.76.255.126 – 10.76.255.12610.76.255.126
12810.76.255.127/3210.76.255.127 – 10.76.255.12710.76.255.127
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 →