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)10.167.138.0/25
network10.167.138.0/25
broadcast10.167.138.127
first host10.167.138.1
last host10.167.138.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.138.0/25
address00001010.10100111.10001010.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.10001010.00000000
broadcast00001010.10100111.10001010.01111111
green = network part, grey = host part
hex0x0aa78a00
decimal178752000
reverse dns0.138.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:8a00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.138.0/3210.167.138.0 – 10.167.138.010.167.138.0
210.167.138.1/3210.167.138.1 – 10.167.138.110.167.138.1
310.167.138.2/3210.167.138.2 – 10.167.138.210.167.138.2
410.167.138.3/3210.167.138.3 – 10.167.138.310.167.138.3
510.167.138.4/3210.167.138.4 – 10.167.138.410.167.138.4
610.167.138.5/3210.167.138.5 – 10.167.138.510.167.138.5
710.167.138.6/3210.167.138.6 – 10.167.138.610.167.138.6
810.167.138.7/3210.167.138.7 – 10.167.138.710.167.138.7
910.167.138.8/3210.167.138.8 – 10.167.138.810.167.138.8
1010.167.138.9/3210.167.138.9 – 10.167.138.910.167.138.9
1110.167.138.10/3210.167.138.10 – 10.167.138.1010.167.138.10
1210.167.138.11/3210.167.138.11 – 10.167.138.1110.167.138.11
1310.167.138.12/3210.167.138.12 – 10.167.138.1210.167.138.12
1410.167.138.13/3210.167.138.13 – 10.167.138.1310.167.138.13
1510.167.138.14/3210.167.138.14 – 10.167.138.1410.167.138.14
1610.167.138.15/3210.167.138.15 – 10.167.138.1510.167.138.15
1710.167.138.16/3210.167.138.16 – 10.167.138.1610.167.138.16
1810.167.138.17/3210.167.138.17 – 10.167.138.1710.167.138.17
1910.167.138.18/3210.167.138.18 – 10.167.138.1810.167.138.18
2010.167.138.19/3210.167.138.19 – 10.167.138.1910.167.138.19
2110.167.138.20/3210.167.138.20 – 10.167.138.2010.167.138.20
2210.167.138.21/3210.167.138.21 – 10.167.138.2110.167.138.21
2310.167.138.22/3210.167.138.22 – 10.167.138.2210.167.138.22
2410.167.138.23/3210.167.138.23 – 10.167.138.2310.167.138.23
2510.167.138.24/3210.167.138.24 – 10.167.138.2410.167.138.24
2610.167.138.25/3210.167.138.25 – 10.167.138.2510.167.138.25
2710.167.138.26/3210.167.138.26 – 10.167.138.2610.167.138.26
2810.167.138.27/3210.167.138.27 – 10.167.138.2710.167.138.27
2910.167.138.28/3210.167.138.28 – 10.167.138.2810.167.138.28
3010.167.138.29/3210.167.138.29 – 10.167.138.2910.167.138.29
3110.167.138.30/3210.167.138.30 – 10.167.138.3010.167.138.30
3210.167.138.31/3210.167.138.31 – 10.167.138.3110.167.138.31
3310.167.138.32/3210.167.138.32 – 10.167.138.3210.167.138.32
3410.167.138.33/3210.167.138.33 – 10.167.138.3310.167.138.33
3510.167.138.34/3210.167.138.34 – 10.167.138.3410.167.138.34
3610.167.138.35/3210.167.138.35 – 10.167.138.3510.167.138.35
3710.167.138.36/3210.167.138.36 – 10.167.138.3610.167.138.36
3810.167.138.37/3210.167.138.37 – 10.167.138.3710.167.138.37
3910.167.138.38/3210.167.138.38 – 10.167.138.3810.167.138.38
4010.167.138.39/3210.167.138.39 – 10.167.138.3910.167.138.39
4110.167.138.40/3210.167.138.40 – 10.167.138.4010.167.138.40
4210.167.138.41/3210.167.138.41 – 10.167.138.4110.167.138.41
4310.167.138.42/3210.167.138.42 – 10.167.138.4210.167.138.42
4410.167.138.43/3210.167.138.43 – 10.167.138.4310.167.138.43
4510.167.138.44/3210.167.138.44 – 10.167.138.4410.167.138.44
4610.167.138.45/3210.167.138.45 – 10.167.138.4510.167.138.45
4710.167.138.46/3210.167.138.46 – 10.167.138.4610.167.138.46
4810.167.138.47/3210.167.138.47 – 10.167.138.4710.167.138.47
4910.167.138.48/3210.167.138.48 – 10.167.138.4810.167.138.48
5010.167.138.49/3210.167.138.49 – 10.167.138.4910.167.138.49
5110.167.138.50/3210.167.138.50 – 10.167.138.5010.167.138.50
5210.167.138.51/3210.167.138.51 – 10.167.138.5110.167.138.51
5310.167.138.52/3210.167.138.52 – 10.167.138.5210.167.138.52
5410.167.138.53/3210.167.138.53 – 10.167.138.5310.167.138.53
5510.167.138.54/3210.167.138.54 – 10.167.138.5410.167.138.54
5610.167.138.55/3210.167.138.55 – 10.167.138.5510.167.138.55
5710.167.138.56/3210.167.138.56 – 10.167.138.5610.167.138.56
5810.167.138.57/3210.167.138.57 – 10.167.138.5710.167.138.57
5910.167.138.58/3210.167.138.58 – 10.167.138.5810.167.138.58
6010.167.138.59/3210.167.138.59 – 10.167.138.5910.167.138.59
6110.167.138.60/3210.167.138.60 – 10.167.138.6010.167.138.60
6210.167.138.61/3210.167.138.61 – 10.167.138.6110.167.138.61
6310.167.138.62/3210.167.138.62 – 10.167.138.6210.167.138.62
6410.167.138.63/3210.167.138.63 – 10.167.138.6310.167.138.63
6510.167.138.64/3210.167.138.64 – 10.167.138.6410.167.138.64
6610.167.138.65/3210.167.138.65 – 10.167.138.6510.167.138.65
6710.167.138.66/3210.167.138.66 – 10.167.138.6610.167.138.66
6810.167.138.67/3210.167.138.67 – 10.167.138.6710.167.138.67
6910.167.138.68/3210.167.138.68 – 10.167.138.6810.167.138.68
7010.167.138.69/3210.167.138.69 – 10.167.138.6910.167.138.69
7110.167.138.70/3210.167.138.70 – 10.167.138.7010.167.138.70
7210.167.138.71/3210.167.138.71 – 10.167.138.7110.167.138.71
7310.167.138.72/3210.167.138.72 – 10.167.138.7210.167.138.72
7410.167.138.73/3210.167.138.73 – 10.167.138.7310.167.138.73
7510.167.138.74/3210.167.138.74 – 10.167.138.7410.167.138.74
7610.167.138.75/3210.167.138.75 – 10.167.138.7510.167.138.75
7710.167.138.76/3210.167.138.76 – 10.167.138.7610.167.138.76
7810.167.138.77/3210.167.138.77 – 10.167.138.7710.167.138.77
7910.167.138.78/3210.167.138.78 – 10.167.138.7810.167.138.78
8010.167.138.79/3210.167.138.79 – 10.167.138.7910.167.138.79
8110.167.138.80/3210.167.138.80 – 10.167.138.8010.167.138.80
8210.167.138.81/3210.167.138.81 – 10.167.138.8110.167.138.81
8310.167.138.82/3210.167.138.82 – 10.167.138.8210.167.138.82
8410.167.138.83/3210.167.138.83 – 10.167.138.8310.167.138.83
8510.167.138.84/3210.167.138.84 – 10.167.138.8410.167.138.84
8610.167.138.85/3210.167.138.85 – 10.167.138.8510.167.138.85
8710.167.138.86/3210.167.138.86 – 10.167.138.8610.167.138.86
8810.167.138.87/3210.167.138.87 – 10.167.138.8710.167.138.87
8910.167.138.88/3210.167.138.88 – 10.167.138.8810.167.138.88
9010.167.138.89/3210.167.138.89 – 10.167.138.8910.167.138.89
9110.167.138.90/3210.167.138.90 – 10.167.138.9010.167.138.90
9210.167.138.91/3210.167.138.91 – 10.167.138.9110.167.138.91
9310.167.138.92/3210.167.138.92 – 10.167.138.9210.167.138.92
9410.167.138.93/3210.167.138.93 – 10.167.138.9310.167.138.93
9510.167.138.94/3210.167.138.94 – 10.167.138.9410.167.138.94
9610.167.138.95/3210.167.138.95 – 10.167.138.9510.167.138.95
9710.167.138.96/3210.167.138.96 – 10.167.138.9610.167.138.96
9810.167.138.97/3210.167.138.97 – 10.167.138.9710.167.138.97
9910.167.138.98/3210.167.138.98 – 10.167.138.9810.167.138.98
10010.167.138.99/3210.167.138.99 – 10.167.138.9910.167.138.99
10110.167.138.100/3210.167.138.100 – 10.167.138.10010.167.138.100
10210.167.138.101/3210.167.138.101 – 10.167.138.10110.167.138.101
10310.167.138.102/3210.167.138.102 – 10.167.138.10210.167.138.102
10410.167.138.103/3210.167.138.103 – 10.167.138.10310.167.138.103
10510.167.138.104/3210.167.138.104 – 10.167.138.10410.167.138.104
10610.167.138.105/3210.167.138.105 – 10.167.138.10510.167.138.105
10710.167.138.106/3210.167.138.106 – 10.167.138.10610.167.138.106
10810.167.138.107/3210.167.138.107 – 10.167.138.10710.167.138.107
10910.167.138.108/3210.167.138.108 – 10.167.138.10810.167.138.108
11010.167.138.109/3210.167.138.109 – 10.167.138.10910.167.138.109
11110.167.138.110/3210.167.138.110 – 10.167.138.11010.167.138.110
11210.167.138.111/3210.167.138.111 – 10.167.138.11110.167.138.111
11310.167.138.112/3210.167.138.112 – 10.167.138.11210.167.138.112
11410.167.138.113/3210.167.138.113 – 10.167.138.11310.167.138.113
11510.167.138.114/3210.167.138.114 – 10.167.138.11410.167.138.114
11610.167.138.115/3210.167.138.115 – 10.167.138.11510.167.138.115
11710.167.138.116/3210.167.138.116 – 10.167.138.11610.167.138.116
11810.167.138.117/3210.167.138.117 – 10.167.138.11710.167.138.117
11910.167.138.118/3210.167.138.118 – 10.167.138.11810.167.138.118
12010.167.138.119/3210.167.138.119 – 10.167.138.11910.167.138.119
12110.167.138.120/3210.167.138.120 – 10.167.138.12010.167.138.120
12210.167.138.121/3210.167.138.121 – 10.167.138.12110.167.138.121
12310.167.138.122/3210.167.138.122 – 10.167.138.12210.167.138.122
12410.167.138.123/3210.167.138.123 – 10.167.138.12310.167.138.123
12510.167.138.124/3210.167.138.124 – 10.167.138.12410.167.138.124
12610.167.138.125/3210.167.138.125 – 10.167.138.12510.167.138.125
12710.167.138.126/3210.167.138.126 – 10.167.138.12610.167.138.126
12810.167.138.127/3210.167.138.127 – 10.167.138.12710.167.138.127
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 →