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)10.2.164.0/25
network10.2.164.0/25
broadcast10.2.164.127
first host10.2.164.1
last host10.2.164.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.164.0/25
address00001010.00000010.10100100.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.10100100.00000000
broadcast00001010.00000010.10100100.01111111
green = network part, grey = host part
hex0x0a02a400
decimal167945216
reverse dns0.164.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:a400

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.164.0/3210.2.164.0 – 10.2.164.010.2.164.0
210.2.164.1/3210.2.164.1 – 10.2.164.110.2.164.1
310.2.164.2/3210.2.164.2 – 10.2.164.210.2.164.2
410.2.164.3/3210.2.164.3 – 10.2.164.310.2.164.3
510.2.164.4/3210.2.164.4 – 10.2.164.410.2.164.4
610.2.164.5/3210.2.164.5 – 10.2.164.510.2.164.5
710.2.164.6/3210.2.164.6 – 10.2.164.610.2.164.6
810.2.164.7/3210.2.164.7 – 10.2.164.710.2.164.7
910.2.164.8/3210.2.164.8 – 10.2.164.810.2.164.8
1010.2.164.9/3210.2.164.9 – 10.2.164.910.2.164.9
1110.2.164.10/3210.2.164.10 – 10.2.164.1010.2.164.10
1210.2.164.11/3210.2.164.11 – 10.2.164.1110.2.164.11
1310.2.164.12/3210.2.164.12 – 10.2.164.1210.2.164.12
1410.2.164.13/3210.2.164.13 – 10.2.164.1310.2.164.13
1510.2.164.14/3210.2.164.14 – 10.2.164.1410.2.164.14
1610.2.164.15/3210.2.164.15 – 10.2.164.1510.2.164.15
1710.2.164.16/3210.2.164.16 – 10.2.164.1610.2.164.16
1810.2.164.17/3210.2.164.17 – 10.2.164.1710.2.164.17
1910.2.164.18/3210.2.164.18 – 10.2.164.1810.2.164.18
2010.2.164.19/3210.2.164.19 – 10.2.164.1910.2.164.19
2110.2.164.20/3210.2.164.20 – 10.2.164.2010.2.164.20
2210.2.164.21/3210.2.164.21 – 10.2.164.2110.2.164.21
2310.2.164.22/3210.2.164.22 – 10.2.164.2210.2.164.22
2410.2.164.23/3210.2.164.23 – 10.2.164.2310.2.164.23
2510.2.164.24/3210.2.164.24 – 10.2.164.2410.2.164.24
2610.2.164.25/3210.2.164.25 – 10.2.164.2510.2.164.25
2710.2.164.26/3210.2.164.26 – 10.2.164.2610.2.164.26
2810.2.164.27/3210.2.164.27 – 10.2.164.2710.2.164.27
2910.2.164.28/3210.2.164.28 – 10.2.164.2810.2.164.28
3010.2.164.29/3210.2.164.29 – 10.2.164.2910.2.164.29
3110.2.164.30/3210.2.164.30 – 10.2.164.3010.2.164.30
3210.2.164.31/3210.2.164.31 – 10.2.164.3110.2.164.31
3310.2.164.32/3210.2.164.32 – 10.2.164.3210.2.164.32
3410.2.164.33/3210.2.164.33 – 10.2.164.3310.2.164.33
3510.2.164.34/3210.2.164.34 – 10.2.164.3410.2.164.34
3610.2.164.35/3210.2.164.35 – 10.2.164.3510.2.164.35
3710.2.164.36/3210.2.164.36 – 10.2.164.3610.2.164.36
3810.2.164.37/3210.2.164.37 – 10.2.164.3710.2.164.37
3910.2.164.38/3210.2.164.38 – 10.2.164.3810.2.164.38
4010.2.164.39/3210.2.164.39 – 10.2.164.3910.2.164.39
4110.2.164.40/3210.2.164.40 – 10.2.164.4010.2.164.40
4210.2.164.41/3210.2.164.41 – 10.2.164.4110.2.164.41
4310.2.164.42/3210.2.164.42 – 10.2.164.4210.2.164.42
4410.2.164.43/3210.2.164.43 – 10.2.164.4310.2.164.43
4510.2.164.44/3210.2.164.44 – 10.2.164.4410.2.164.44
4610.2.164.45/3210.2.164.45 – 10.2.164.4510.2.164.45
4710.2.164.46/3210.2.164.46 – 10.2.164.4610.2.164.46
4810.2.164.47/3210.2.164.47 – 10.2.164.4710.2.164.47
4910.2.164.48/3210.2.164.48 – 10.2.164.4810.2.164.48
5010.2.164.49/3210.2.164.49 – 10.2.164.4910.2.164.49
5110.2.164.50/3210.2.164.50 – 10.2.164.5010.2.164.50
5210.2.164.51/3210.2.164.51 – 10.2.164.5110.2.164.51
5310.2.164.52/3210.2.164.52 – 10.2.164.5210.2.164.52
5410.2.164.53/3210.2.164.53 – 10.2.164.5310.2.164.53
5510.2.164.54/3210.2.164.54 – 10.2.164.5410.2.164.54
5610.2.164.55/3210.2.164.55 – 10.2.164.5510.2.164.55
5710.2.164.56/3210.2.164.56 – 10.2.164.5610.2.164.56
5810.2.164.57/3210.2.164.57 – 10.2.164.5710.2.164.57
5910.2.164.58/3210.2.164.58 – 10.2.164.5810.2.164.58
6010.2.164.59/3210.2.164.59 – 10.2.164.5910.2.164.59
6110.2.164.60/3210.2.164.60 – 10.2.164.6010.2.164.60
6210.2.164.61/3210.2.164.61 – 10.2.164.6110.2.164.61
6310.2.164.62/3210.2.164.62 – 10.2.164.6210.2.164.62
6410.2.164.63/3210.2.164.63 – 10.2.164.6310.2.164.63
6510.2.164.64/3210.2.164.64 – 10.2.164.6410.2.164.64
6610.2.164.65/3210.2.164.65 – 10.2.164.6510.2.164.65
6710.2.164.66/3210.2.164.66 – 10.2.164.6610.2.164.66
6810.2.164.67/3210.2.164.67 – 10.2.164.6710.2.164.67
6910.2.164.68/3210.2.164.68 – 10.2.164.6810.2.164.68
7010.2.164.69/3210.2.164.69 – 10.2.164.6910.2.164.69
7110.2.164.70/3210.2.164.70 – 10.2.164.7010.2.164.70
7210.2.164.71/3210.2.164.71 – 10.2.164.7110.2.164.71
7310.2.164.72/3210.2.164.72 – 10.2.164.7210.2.164.72
7410.2.164.73/3210.2.164.73 – 10.2.164.7310.2.164.73
7510.2.164.74/3210.2.164.74 – 10.2.164.7410.2.164.74
7610.2.164.75/3210.2.164.75 – 10.2.164.7510.2.164.75
7710.2.164.76/3210.2.164.76 – 10.2.164.7610.2.164.76
7810.2.164.77/3210.2.164.77 – 10.2.164.7710.2.164.77
7910.2.164.78/3210.2.164.78 – 10.2.164.7810.2.164.78
8010.2.164.79/3210.2.164.79 – 10.2.164.7910.2.164.79
8110.2.164.80/3210.2.164.80 – 10.2.164.8010.2.164.80
8210.2.164.81/3210.2.164.81 – 10.2.164.8110.2.164.81
8310.2.164.82/3210.2.164.82 – 10.2.164.8210.2.164.82
8410.2.164.83/3210.2.164.83 – 10.2.164.8310.2.164.83
8510.2.164.84/3210.2.164.84 – 10.2.164.8410.2.164.84
8610.2.164.85/3210.2.164.85 – 10.2.164.8510.2.164.85
8710.2.164.86/3210.2.164.86 – 10.2.164.8610.2.164.86
8810.2.164.87/3210.2.164.87 – 10.2.164.8710.2.164.87
8910.2.164.88/3210.2.164.88 – 10.2.164.8810.2.164.88
9010.2.164.89/3210.2.164.89 – 10.2.164.8910.2.164.89
9110.2.164.90/3210.2.164.90 – 10.2.164.9010.2.164.90
9210.2.164.91/3210.2.164.91 – 10.2.164.9110.2.164.91
9310.2.164.92/3210.2.164.92 – 10.2.164.9210.2.164.92
9410.2.164.93/3210.2.164.93 – 10.2.164.9310.2.164.93
9510.2.164.94/3210.2.164.94 – 10.2.164.9410.2.164.94
9610.2.164.95/3210.2.164.95 – 10.2.164.9510.2.164.95
9710.2.164.96/3210.2.164.96 – 10.2.164.9610.2.164.96
9810.2.164.97/3210.2.164.97 – 10.2.164.9710.2.164.97
9910.2.164.98/3210.2.164.98 – 10.2.164.9810.2.164.98
10010.2.164.99/3210.2.164.99 – 10.2.164.9910.2.164.99
10110.2.164.100/3210.2.164.100 – 10.2.164.10010.2.164.100
10210.2.164.101/3210.2.164.101 – 10.2.164.10110.2.164.101
10310.2.164.102/3210.2.164.102 – 10.2.164.10210.2.164.102
10410.2.164.103/3210.2.164.103 – 10.2.164.10310.2.164.103
10510.2.164.104/3210.2.164.104 – 10.2.164.10410.2.164.104
10610.2.164.105/3210.2.164.105 – 10.2.164.10510.2.164.105
10710.2.164.106/3210.2.164.106 – 10.2.164.10610.2.164.106
10810.2.164.107/3210.2.164.107 – 10.2.164.10710.2.164.107
10910.2.164.108/3210.2.164.108 – 10.2.164.10810.2.164.108
11010.2.164.109/3210.2.164.109 – 10.2.164.10910.2.164.109
11110.2.164.110/3210.2.164.110 – 10.2.164.11010.2.164.110
11210.2.164.111/3210.2.164.111 – 10.2.164.11110.2.164.111
11310.2.164.112/3210.2.164.112 – 10.2.164.11210.2.164.112
11410.2.164.113/3210.2.164.113 – 10.2.164.11310.2.164.113
11510.2.164.114/3210.2.164.114 – 10.2.164.11410.2.164.114
11610.2.164.115/3210.2.164.115 – 10.2.164.11510.2.164.115
11710.2.164.116/3210.2.164.116 – 10.2.164.11610.2.164.116
11810.2.164.117/3210.2.164.117 – 10.2.164.11710.2.164.117
11910.2.164.118/3210.2.164.118 – 10.2.164.11810.2.164.118
12010.2.164.119/3210.2.164.119 – 10.2.164.11910.2.164.119
12110.2.164.120/3210.2.164.120 – 10.2.164.12010.2.164.120
12210.2.164.121/3210.2.164.121 – 10.2.164.12110.2.164.121
12310.2.164.122/3210.2.164.122 – 10.2.164.12210.2.164.122
12410.2.164.123/3210.2.164.123 – 10.2.164.12310.2.164.123
12510.2.164.124/3210.2.164.124 – 10.2.164.12410.2.164.124
12610.2.164.125/3210.2.164.125 – 10.2.164.12510.2.164.125
12710.2.164.126/3210.2.164.126 – 10.2.164.12610.2.164.126
12810.2.164.127/3210.2.164.127 – 10.2.164.12710.2.164.127
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 →