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)10.166.36.0/25
network10.166.36.0/25
broadcast10.166.36.127
first host10.166.36.1
last host10.166.36.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.166.36.0/25
address00001010.10100110.00100100.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100110.00100100.00000000
broadcast00001010.10100110.00100100.01111111
green = network part, grey = host part
hex0x0aa62400
decimal178660352
reverse dns0.36.166.10.in-addr.arpa
ipv4-mapped::ffff:aa6:2400

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.166.36.0/3210.166.36.0 – 10.166.36.010.166.36.0
210.166.36.1/3210.166.36.1 – 10.166.36.110.166.36.1
310.166.36.2/3210.166.36.2 – 10.166.36.210.166.36.2
410.166.36.3/3210.166.36.3 – 10.166.36.310.166.36.3
510.166.36.4/3210.166.36.4 – 10.166.36.410.166.36.4
610.166.36.5/3210.166.36.5 – 10.166.36.510.166.36.5
710.166.36.6/3210.166.36.6 – 10.166.36.610.166.36.6
810.166.36.7/3210.166.36.7 – 10.166.36.710.166.36.7
910.166.36.8/3210.166.36.8 – 10.166.36.810.166.36.8
1010.166.36.9/3210.166.36.9 – 10.166.36.910.166.36.9
1110.166.36.10/3210.166.36.10 – 10.166.36.1010.166.36.10
1210.166.36.11/3210.166.36.11 – 10.166.36.1110.166.36.11
1310.166.36.12/3210.166.36.12 – 10.166.36.1210.166.36.12
1410.166.36.13/3210.166.36.13 – 10.166.36.1310.166.36.13
1510.166.36.14/3210.166.36.14 – 10.166.36.1410.166.36.14
1610.166.36.15/3210.166.36.15 – 10.166.36.1510.166.36.15
1710.166.36.16/3210.166.36.16 – 10.166.36.1610.166.36.16
1810.166.36.17/3210.166.36.17 – 10.166.36.1710.166.36.17
1910.166.36.18/3210.166.36.18 – 10.166.36.1810.166.36.18
2010.166.36.19/3210.166.36.19 – 10.166.36.1910.166.36.19
2110.166.36.20/3210.166.36.20 – 10.166.36.2010.166.36.20
2210.166.36.21/3210.166.36.21 – 10.166.36.2110.166.36.21
2310.166.36.22/3210.166.36.22 – 10.166.36.2210.166.36.22
2410.166.36.23/3210.166.36.23 – 10.166.36.2310.166.36.23
2510.166.36.24/3210.166.36.24 – 10.166.36.2410.166.36.24
2610.166.36.25/3210.166.36.25 – 10.166.36.2510.166.36.25
2710.166.36.26/3210.166.36.26 – 10.166.36.2610.166.36.26
2810.166.36.27/3210.166.36.27 – 10.166.36.2710.166.36.27
2910.166.36.28/3210.166.36.28 – 10.166.36.2810.166.36.28
3010.166.36.29/3210.166.36.29 – 10.166.36.2910.166.36.29
3110.166.36.30/3210.166.36.30 – 10.166.36.3010.166.36.30
3210.166.36.31/3210.166.36.31 – 10.166.36.3110.166.36.31
3310.166.36.32/3210.166.36.32 – 10.166.36.3210.166.36.32
3410.166.36.33/3210.166.36.33 – 10.166.36.3310.166.36.33
3510.166.36.34/3210.166.36.34 – 10.166.36.3410.166.36.34
3610.166.36.35/3210.166.36.35 – 10.166.36.3510.166.36.35
3710.166.36.36/3210.166.36.36 – 10.166.36.3610.166.36.36
3810.166.36.37/3210.166.36.37 – 10.166.36.3710.166.36.37
3910.166.36.38/3210.166.36.38 – 10.166.36.3810.166.36.38
4010.166.36.39/3210.166.36.39 – 10.166.36.3910.166.36.39
4110.166.36.40/3210.166.36.40 – 10.166.36.4010.166.36.40
4210.166.36.41/3210.166.36.41 – 10.166.36.4110.166.36.41
4310.166.36.42/3210.166.36.42 – 10.166.36.4210.166.36.42
4410.166.36.43/3210.166.36.43 – 10.166.36.4310.166.36.43
4510.166.36.44/3210.166.36.44 – 10.166.36.4410.166.36.44
4610.166.36.45/3210.166.36.45 – 10.166.36.4510.166.36.45
4710.166.36.46/3210.166.36.46 – 10.166.36.4610.166.36.46
4810.166.36.47/3210.166.36.47 – 10.166.36.4710.166.36.47
4910.166.36.48/3210.166.36.48 – 10.166.36.4810.166.36.48
5010.166.36.49/3210.166.36.49 – 10.166.36.4910.166.36.49
5110.166.36.50/3210.166.36.50 – 10.166.36.5010.166.36.50
5210.166.36.51/3210.166.36.51 – 10.166.36.5110.166.36.51
5310.166.36.52/3210.166.36.52 – 10.166.36.5210.166.36.52
5410.166.36.53/3210.166.36.53 – 10.166.36.5310.166.36.53
5510.166.36.54/3210.166.36.54 – 10.166.36.5410.166.36.54
5610.166.36.55/3210.166.36.55 – 10.166.36.5510.166.36.55
5710.166.36.56/3210.166.36.56 – 10.166.36.5610.166.36.56
5810.166.36.57/3210.166.36.57 – 10.166.36.5710.166.36.57
5910.166.36.58/3210.166.36.58 – 10.166.36.5810.166.36.58
6010.166.36.59/3210.166.36.59 – 10.166.36.5910.166.36.59
6110.166.36.60/3210.166.36.60 – 10.166.36.6010.166.36.60
6210.166.36.61/3210.166.36.61 – 10.166.36.6110.166.36.61
6310.166.36.62/3210.166.36.62 – 10.166.36.6210.166.36.62
6410.166.36.63/3210.166.36.63 – 10.166.36.6310.166.36.63
6510.166.36.64/3210.166.36.64 – 10.166.36.6410.166.36.64
6610.166.36.65/3210.166.36.65 – 10.166.36.6510.166.36.65
6710.166.36.66/3210.166.36.66 – 10.166.36.6610.166.36.66
6810.166.36.67/3210.166.36.67 – 10.166.36.6710.166.36.67
6910.166.36.68/3210.166.36.68 – 10.166.36.6810.166.36.68
7010.166.36.69/3210.166.36.69 – 10.166.36.6910.166.36.69
7110.166.36.70/3210.166.36.70 – 10.166.36.7010.166.36.70
7210.166.36.71/3210.166.36.71 – 10.166.36.7110.166.36.71
7310.166.36.72/3210.166.36.72 – 10.166.36.7210.166.36.72
7410.166.36.73/3210.166.36.73 – 10.166.36.7310.166.36.73
7510.166.36.74/3210.166.36.74 – 10.166.36.7410.166.36.74
7610.166.36.75/3210.166.36.75 – 10.166.36.7510.166.36.75
7710.166.36.76/3210.166.36.76 – 10.166.36.7610.166.36.76
7810.166.36.77/3210.166.36.77 – 10.166.36.7710.166.36.77
7910.166.36.78/3210.166.36.78 – 10.166.36.7810.166.36.78
8010.166.36.79/3210.166.36.79 – 10.166.36.7910.166.36.79
8110.166.36.80/3210.166.36.80 – 10.166.36.8010.166.36.80
8210.166.36.81/3210.166.36.81 – 10.166.36.8110.166.36.81
8310.166.36.82/3210.166.36.82 – 10.166.36.8210.166.36.82
8410.166.36.83/3210.166.36.83 – 10.166.36.8310.166.36.83
8510.166.36.84/3210.166.36.84 – 10.166.36.8410.166.36.84
8610.166.36.85/3210.166.36.85 – 10.166.36.8510.166.36.85
8710.166.36.86/3210.166.36.86 – 10.166.36.8610.166.36.86
8810.166.36.87/3210.166.36.87 – 10.166.36.8710.166.36.87
8910.166.36.88/3210.166.36.88 – 10.166.36.8810.166.36.88
9010.166.36.89/3210.166.36.89 – 10.166.36.8910.166.36.89
9110.166.36.90/3210.166.36.90 – 10.166.36.9010.166.36.90
9210.166.36.91/3210.166.36.91 – 10.166.36.9110.166.36.91
9310.166.36.92/3210.166.36.92 – 10.166.36.9210.166.36.92
9410.166.36.93/3210.166.36.93 – 10.166.36.9310.166.36.93
9510.166.36.94/3210.166.36.94 – 10.166.36.9410.166.36.94
9610.166.36.95/3210.166.36.95 – 10.166.36.9510.166.36.95
9710.166.36.96/3210.166.36.96 – 10.166.36.9610.166.36.96
9810.166.36.97/3210.166.36.97 – 10.166.36.9710.166.36.97
9910.166.36.98/3210.166.36.98 – 10.166.36.9810.166.36.98
10010.166.36.99/3210.166.36.99 – 10.166.36.9910.166.36.99
10110.166.36.100/3210.166.36.100 – 10.166.36.10010.166.36.100
10210.166.36.101/3210.166.36.101 – 10.166.36.10110.166.36.101
10310.166.36.102/3210.166.36.102 – 10.166.36.10210.166.36.102
10410.166.36.103/3210.166.36.103 – 10.166.36.10310.166.36.103
10510.166.36.104/3210.166.36.104 – 10.166.36.10410.166.36.104
10610.166.36.105/3210.166.36.105 – 10.166.36.10510.166.36.105
10710.166.36.106/3210.166.36.106 – 10.166.36.10610.166.36.106
10810.166.36.107/3210.166.36.107 – 10.166.36.10710.166.36.107
10910.166.36.108/3210.166.36.108 – 10.166.36.10810.166.36.108
11010.166.36.109/3210.166.36.109 – 10.166.36.10910.166.36.109
11110.166.36.110/3210.166.36.110 – 10.166.36.11010.166.36.110
11210.166.36.111/3210.166.36.111 – 10.166.36.11110.166.36.111
11310.166.36.112/3210.166.36.112 – 10.166.36.11210.166.36.112
11410.166.36.113/3210.166.36.113 – 10.166.36.11310.166.36.113
11510.166.36.114/3210.166.36.114 – 10.166.36.11410.166.36.114
11610.166.36.115/3210.166.36.115 – 10.166.36.11510.166.36.115
11710.166.36.116/3210.166.36.116 – 10.166.36.11610.166.36.116
11810.166.36.117/3210.166.36.117 – 10.166.36.11710.166.36.117
11910.166.36.118/3210.166.36.118 – 10.166.36.11810.166.36.118
12010.166.36.119/3210.166.36.119 – 10.166.36.11910.166.36.119
12110.166.36.120/3210.166.36.120 – 10.166.36.12010.166.36.120
12210.166.36.121/3210.166.36.121 – 10.166.36.12110.166.36.121
12310.166.36.122/3210.166.36.122 – 10.166.36.12210.166.36.122
12410.166.36.123/3210.166.36.123 – 10.166.36.12310.166.36.123
12510.166.36.124/3210.166.36.124 – 10.166.36.12410.166.36.124
12610.166.36.125/3210.166.36.125 – 10.166.36.12510.166.36.125
12710.166.36.126/3210.166.36.126 – 10.166.36.12610.166.36.126
12810.166.36.127/3210.166.36.127 – 10.166.36.12710.166.36.127
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 →