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)10.0.43.0/25
network10.0.43.0/25
broadcast10.0.43.127
first host10.0.43.1
last host10.0.43.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.0.43.0/25
address00001010.00000000.00101011.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000000.00101011.00000000
broadcast00001010.00000000.00101011.01111111
green = network part, grey = host part
hex0x0a002b00
decimal167783168
reverse dns0.43.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:2b00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.43.0/3210.0.43.0 – 10.0.43.010.0.43.0
210.0.43.1/3210.0.43.1 – 10.0.43.110.0.43.1
310.0.43.2/3210.0.43.2 – 10.0.43.210.0.43.2
410.0.43.3/3210.0.43.3 – 10.0.43.310.0.43.3
510.0.43.4/3210.0.43.4 – 10.0.43.410.0.43.4
610.0.43.5/3210.0.43.5 – 10.0.43.510.0.43.5
710.0.43.6/3210.0.43.6 – 10.0.43.610.0.43.6
810.0.43.7/3210.0.43.7 – 10.0.43.710.0.43.7
910.0.43.8/3210.0.43.8 – 10.0.43.810.0.43.8
1010.0.43.9/3210.0.43.9 – 10.0.43.910.0.43.9
1110.0.43.10/3210.0.43.10 – 10.0.43.1010.0.43.10
1210.0.43.11/3210.0.43.11 – 10.0.43.1110.0.43.11
1310.0.43.12/3210.0.43.12 – 10.0.43.1210.0.43.12
1410.0.43.13/3210.0.43.13 – 10.0.43.1310.0.43.13
1510.0.43.14/3210.0.43.14 – 10.0.43.1410.0.43.14
1610.0.43.15/3210.0.43.15 – 10.0.43.1510.0.43.15
1710.0.43.16/3210.0.43.16 – 10.0.43.1610.0.43.16
1810.0.43.17/3210.0.43.17 – 10.0.43.1710.0.43.17
1910.0.43.18/3210.0.43.18 – 10.0.43.1810.0.43.18
2010.0.43.19/3210.0.43.19 – 10.0.43.1910.0.43.19
2110.0.43.20/3210.0.43.20 – 10.0.43.2010.0.43.20
2210.0.43.21/3210.0.43.21 – 10.0.43.2110.0.43.21
2310.0.43.22/3210.0.43.22 – 10.0.43.2210.0.43.22
2410.0.43.23/3210.0.43.23 – 10.0.43.2310.0.43.23
2510.0.43.24/3210.0.43.24 – 10.0.43.2410.0.43.24
2610.0.43.25/3210.0.43.25 – 10.0.43.2510.0.43.25
2710.0.43.26/3210.0.43.26 – 10.0.43.2610.0.43.26
2810.0.43.27/3210.0.43.27 – 10.0.43.2710.0.43.27
2910.0.43.28/3210.0.43.28 – 10.0.43.2810.0.43.28
3010.0.43.29/3210.0.43.29 – 10.0.43.2910.0.43.29
3110.0.43.30/3210.0.43.30 – 10.0.43.3010.0.43.30
3210.0.43.31/3210.0.43.31 – 10.0.43.3110.0.43.31
3310.0.43.32/3210.0.43.32 – 10.0.43.3210.0.43.32
3410.0.43.33/3210.0.43.33 – 10.0.43.3310.0.43.33
3510.0.43.34/3210.0.43.34 – 10.0.43.3410.0.43.34
3610.0.43.35/3210.0.43.35 – 10.0.43.3510.0.43.35
3710.0.43.36/3210.0.43.36 – 10.0.43.3610.0.43.36
3810.0.43.37/3210.0.43.37 – 10.0.43.3710.0.43.37
3910.0.43.38/3210.0.43.38 – 10.0.43.3810.0.43.38
4010.0.43.39/3210.0.43.39 – 10.0.43.3910.0.43.39
4110.0.43.40/3210.0.43.40 – 10.0.43.4010.0.43.40
4210.0.43.41/3210.0.43.41 – 10.0.43.4110.0.43.41
4310.0.43.42/3210.0.43.42 – 10.0.43.4210.0.43.42
4410.0.43.43/3210.0.43.43 – 10.0.43.4310.0.43.43
4510.0.43.44/3210.0.43.44 – 10.0.43.4410.0.43.44
4610.0.43.45/3210.0.43.45 – 10.0.43.4510.0.43.45
4710.0.43.46/3210.0.43.46 – 10.0.43.4610.0.43.46
4810.0.43.47/3210.0.43.47 – 10.0.43.4710.0.43.47
4910.0.43.48/3210.0.43.48 – 10.0.43.4810.0.43.48
5010.0.43.49/3210.0.43.49 – 10.0.43.4910.0.43.49
5110.0.43.50/3210.0.43.50 – 10.0.43.5010.0.43.50
5210.0.43.51/3210.0.43.51 – 10.0.43.5110.0.43.51
5310.0.43.52/3210.0.43.52 – 10.0.43.5210.0.43.52
5410.0.43.53/3210.0.43.53 – 10.0.43.5310.0.43.53
5510.0.43.54/3210.0.43.54 – 10.0.43.5410.0.43.54
5610.0.43.55/3210.0.43.55 – 10.0.43.5510.0.43.55
5710.0.43.56/3210.0.43.56 – 10.0.43.5610.0.43.56
5810.0.43.57/3210.0.43.57 – 10.0.43.5710.0.43.57
5910.0.43.58/3210.0.43.58 – 10.0.43.5810.0.43.58
6010.0.43.59/3210.0.43.59 – 10.0.43.5910.0.43.59
6110.0.43.60/3210.0.43.60 – 10.0.43.6010.0.43.60
6210.0.43.61/3210.0.43.61 – 10.0.43.6110.0.43.61
6310.0.43.62/3210.0.43.62 – 10.0.43.6210.0.43.62
6410.0.43.63/3210.0.43.63 – 10.0.43.6310.0.43.63
6510.0.43.64/3210.0.43.64 – 10.0.43.6410.0.43.64
6610.0.43.65/3210.0.43.65 – 10.0.43.6510.0.43.65
6710.0.43.66/3210.0.43.66 – 10.0.43.6610.0.43.66
6810.0.43.67/3210.0.43.67 – 10.0.43.6710.0.43.67
6910.0.43.68/3210.0.43.68 – 10.0.43.6810.0.43.68
7010.0.43.69/3210.0.43.69 – 10.0.43.6910.0.43.69
7110.0.43.70/3210.0.43.70 – 10.0.43.7010.0.43.70
7210.0.43.71/3210.0.43.71 – 10.0.43.7110.0.43.71
7310.0.43.72/3210.0.43.72 – 10.0.43.7210.0.43.72
7410.0.43.73/3210.0.43.73 – 10.0.43.7310.0.43.73
7510.0.43.74/3210.0.43.74 – 10.0.43.7410.0.43.74
7610.0.43.75/3210.0.43.75 – 10.0.43.7510.0.43.75
7710.0.43.76/3210.0.43.76 – 10.0.43.7610.0.43.76
7810.0.43.77/3210.0.43.77 – 10.0.43.7710.0.43.77
7910.0.43.78/3210.0.43.78 – 10.0.43.7810.0.43.78
8010.0.43.79/3210.0.43.79 – 10.0.43.7910.0.43.79
8110.0.43.80/3210.0.43.80 – 10.0.43.8010.0.43.80
8210.0.43.81/3210.0.43.81 – 10.0.43.8110.0.43.81
8310.0.43.82/3210.0.43.82 – 10.0.43.8210.0.43.82
8410.0.43.83/3210.0.43.83 – 10.0.43.8310.0.43.83
8510.0.43.84/3210.0.43.84 – 10.0.43.8410.0.43.84
8610.0.43.85/3210.0.43.85 – 10.0.43.8510.0.43.85
8710.0.43.86/3210.0.43.86 – 10.0.43.8610.0.43.86
8810.0.43.87/3210.0.43.87 – 10.0.43.8710.0.43.87
8910.0.43.88/3210.0.43.88 – 10.0.43.8810.0.43.88
9010.0.43.89/3210.0.43.89 – 10.0.43.8910.0.43.89
9110.0.43.90/3210.0.43.90 – 10.0.43.9010.0.43.90
9210.0.43.91/3210.0.43.91 – 10.0.43.9110.0.43.91
9310.0.43.92/3210.0.43.92 – 10.0.43.9210.0.43.92
9410.0.43.93/3210.0.43.93 – 10.0.43.9310.0.43.93
9510.0.43.94/3210.0.43.94 – 10.0.43.9410.0.43.94
9610.0.43.95/3210.0.43.95 – 10.0.43.9510.0.43.95
9710.0.43.96/3210.0.43.96 – 10.0.43.9610.0.43.96
9810.0.43.97/3210.0.43.97 – 10.0.43.9710.0.43.97
9910.0.43.98/3210.0.43.98 – 10.0.43.9810.0.43.98
10010.0.43.99/3210.0.43.99 – 10.0.43.9910.0.43.99
10110.0.43.100/3210.0.43.100 – 10.0.43.10010.0.43.100
10210.0.43.101/3210.0.43.101 – 10.0.43.10110.0.43.101
10310.0.43.102/3210.0.43.102 – 10.0.43.10210.0.43.102
10410.0.43.103/3210.0.43.103 – 10.0.43.10310.0.43.103
10510.0.43.104/3210.0.43.104 – 10.0.43.10410.0.43.104
10610.0.43.105/3210.0.43.105 – 10.0.43.10510.0.43.105
10710.0.43.106/3210.0.43.106 – 10.0.43.10610.0.43.106
10810.0.43.107/3210.0.43.107 – 10.0.43.10710.0.43.107
10910.0.43.108/3210.0.43.108 – 10.0.43.10810.0.43.108
11010.0.43.109/3210.0.43.109 – 10.0.43.10910.0.43.109
11110.0.43.110/3210.0.43.110 – 10.0.43.11010.0.43.110
11210.0.43.111/3210.0.43.111 – 10.0.43.11110.0.43.111
11310.0.43.112/3210.0.43.112 – 10.0.43.11210.0.43.112
11410.0.43.113/3210.0.43.113 – 10.0.43.11310.0.43.113
11510.0.43.114/3210.0.43.114 – 10.0.43.11410.0.43.114
11610.0.43.115/3210.0.43.115 – 10.0.43.11510.0.43.115
11710.0.43.116/3210.0.43.116 – 10.0.43.11610.0.43.116
11810.0.43.117/3210.0.43.117 – 10.0.43.11710.0.43.117
11910.0.43.118/3210.0.43.118 – 10.0.43.11810.0.43.118
12010.0.43.119/3210.0.43.119 – 10.0.43.11910.0.43.119
12110.0.43.120/3210.0.43.120 – 10.0.43.12010.0.43.120
12210.0.43.121/3210.0.43.121 – 10.0.43.12110.0.43.121
12310.0.43.122/3210.0.43.122 – 10.0.43.12210.0.43.122
12410.0.43.123/3210.0.43.123 – 10.0.43.12310.0.43.123
12510.0.43.124/3210.0.43.124 – 10.0.43.12410.0.43.124
12610.0.43.125/3210.0.43.125 – 10.0.43.12510.0.43.125
12710.0.43.126/3210.0.43.126 – 10.0.43.12610.0.43.126
12810.0.43.127/3210.0.43.127 – 10.0.43.12710.0.43.127
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 →