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)10.167.125.0/25
network10.167.125.0/25
broadcast10.167.125.127
first host10.167.125.1
last host10.167.125.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.125.0/25
address00001010.10100111.01111101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.01111101.00000000
broadcast00001010.10100111.01111101.01111111
green = network part, grey = host part
hex0x0aa77d00
decimal178748672
reverse dns0.125.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:7d00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.125.0/3210.167.125.0 – 10.167.125.010.167.125.0
210.167.125.1/3210.167.125.1 – 10.167.125.110.167.125.1
310.167.125.2/3210.167.125.2 – 10.167.125.210.167.125.2
410.167.125.3/3210.167.125.3 – 10.167.125.310.167.125.3
510.167.125.4/3210.167.125.4 – 10.167.125.410.167.125.4
610.167.125.5/3210.167.125.5 – 10.167.125.510.167.125.5
710.167.125.6/3210.167.125.6 – 10.167.125.610.167.125.6
810.167.125.7/3210.167.125.7 – 10.167.125.710.167.125.7
910.167.125.8/3210.167.125.8 – 10.167.125.810.167.125.8
1010.167.125.9/3210.167.125.9 – 10.167.125.910.167.125.9
1110.167.125.10/3210.167.125.10 – 10.167.125.1010.167.125.10
1210.167.125.11/3210.167.125.11 – 10.167.125.1110.167.125.11
1310.167.125.12/3210.167.125.12 – 10.167.125.1210.167.125.12
1410.167.125.13/3210.167.125.13 – 10.167.125.1310.167.125.13
1510.167.125.14/3210.167.125.14 – 10.167.125.1410.167.125.14
1610.167.125.15/3210.167.125.15 – 10.167.125.1510.167.125.15
1710.167.125.16/3210.167.125.16 – 10.167.125.1610.167.125.16
1810.167.125.17/3210.167.125.17 – 10.167.125.1710.167.125.17
1910.167.125.18/3210.167.125.18 – 10.167.125.1810.167.125.18
2010.167.125.19/3210.167.125.19 – 10.167.125.1910.167.125.19
2110.167.125.20/3210.167.125.20 – 10.167.125.2010.167.125.20
2210.167.125.21/3210.167.125.21 – 10.167.125.2110.167.125.21
2310.167.125.22/3210.167.125.22 – 10.167.125.2210.167.125.22
2410.167.125.23/3210.167.125.23 – 10.167.125.2310.167.125.23
2510.167.125.24/3210.167.125.24 – 10.167.125.2410.167.125.24
2610.167.125.25/3210.167.125.25 – 10.167.125.2510.167.125.25
2710.167.125.26/3210.167.125.26 – 10.167.125.2610.167.125.26
2810.167.125.27/3210.167.125.27 – 10.167.125.2710.167.125.27
2910.167.125.28/3210.167.125.28 – 10.167.125.2810.167.125.28
3010.167.125.29/3210.167.125.29 – 10.167.125.2910.167.125.29
3110.167.125.30/3210.167.125.30 – 10.167.125.3010.167.125.30
3210.167.125.31/3210.167.125.31 – 10.167.125.3110.167.125.31
3310.167.125.32/3210.167.125.32 – 10.167.125.3210.167.125.32
3410.167.125.33/3210.167.125.33 – 10.167.125.3310.167.125.33
3510.167.125.34/3210.167.125.34 – 10.167.125.3410.167.125.34
3610.167.125.35/3210.167.125.35 – 10.167.125.3510.167.125.35
3710.167.125.36/3210.167.125.36 – 10.167.125.3610.167.125.36
3810.167.125.37/3210.167.125.37 – 10.167.125.3710.167.125.37
3910.167.125.38/3210.167.125.38 – 10.167.125.3810.167.125.38
4010.167.125.39/3210.167.125.39 – 10.167.125.3910.167.125.39
4110.167.125.40/3210.167.125.40 – 10.167.125.4010.167.125.40
4210.167.125.41/3210.167.125.41 – 10.167.125.4110.167.125.41
4310.167.125.42/3210.167.125.42 – 10.167.125.4210.167.125.42
4410.167.125.43/3210.167.125.43 – 10.167.125.4310.167.125.43
4510.167.125.44/3210.167.125.44 – 10.167.125.4410.167.125.44
4610.167.125.45/3210.167.125.45 – 10.167.125.4510.167.125.45
4710.167.125.46/3210.167.125.46 – 10.167.125.4610.167.125.46
4810.167.125.47/3210.167.125.47 – 10.167.125.4710.167.125.47
4910.167.125.48/3210.167.125.48 – 10.167.125.4810.167.125.48
5010.167.125.49/3210.167.125.49 – 10.167.125.4910.167.125.49
5110.167.125.50/3210.167.125.50 – 10.167.125.5010.167.125.50
5210.167.125.51/3210.167.125.51 – 10.167.125.5110.167.125.51
5310.167.125.52/3210.167.125.52 – 10.167.125.5210.167.125.52
5410.167.125.53/3210.167.125.53 – 10.167.125.5310.167.125.53
5510.167.125.54/3210.167.125.54 – 10.167.125.5410.167.125.54
5610.167.125.55/3210.167.125.55 – 10.167.125.5510.167.125.55
5710.167.125.56/3210.167.125.56 – 10.167.125.5610.167.125.56
5810.167.125.57/3210.167.125.57 – 10.167.125.5710.167.125.57
5910.167.125.58/3210.167.125.58 – 10.167.125.5810.167.125.58
6010.167.125.59/3210.167.125.59 – 10.167.125.5910.167.125.59
6110.167.125.60/3210.167.125.60 – 10.167.125.6010.167.125.60
6210.167.125.61/3210.167.125.61 – 10.167.125.6110.167.125.61
6310.167.125.62/3210.167.125.62 – 10.167.125.6210.167.125.62
6410.167.125.63/3210.167.125.63 – 10.167.125.6310.167.125.63
6510.167.125.64/3210.167.125.64 – 10.167.125.6410.167.125.64
6610.167.125.65/3210.167.125.65 – 10.167.125.6510.167.125.65
6710.167.125.66/3210.167.125.66 – 10.167.125.6610.167.125.66
6810.167.125.67/3210.167.125.67 – 10.167.125.6710.167.125.67
6910.167.125.68/3210.167.125.68 – 10.167.125.6810.167.125.68
7010.167.125.69/3210.167.125.69 – 10.167.125.6910.167.125.69
7110.167.125.70/3210.167.125.70 – 10.167.125.7010.167.125.70
7210.167.125.71/3210.167.125.71 – 10.167.125.7110.167.125.71
7310.167.125.72/3210.167.125.72 – 10.167.125.7210.167.125.72
7410.167.125.73/3210.167.125.73 – 10.167.125.7310.167.125.73
7510.167.125.74/3210.167.125.74 – 10.167.125.7410.167.125.74
7610.167.125.75/3210.167.125.75 – 10.167.125.7510.167.125.75
7710.167.125.76/3210.167.125.76 – 10.167.125.7610.167.125.76
7810.167.125.77/3210.167.125.77 – 10.167.125.7710.167.125.77
7910.167.125.78/3210.167.125.78 – 10.167.125.7810.167.125.78
8010.167.125.79/3210.167.125.79 – 10.167.125.7910.167.125.79
8110.167.125.80/3210.167.125.80 – 10.167.125.8010.167.125.80
8210.167.125.81/3210.167.125.81 – 10.167.125.8110.167.125.81
8310.167.125.82/3210.167.125.82 – 10.167.125.8210.167.125.82
8410.167.125.83/3210.167.125.83 – 10.167.125.8310.167.125.83
8510.167.125.84/3210.167.125.84 – 10.167.125.8410.167.125.84
8610.167.125.85/3210.167.125.85 – 10.167.125.8510.167.125.85
8710.167.125.86/3210.167.125.86 – 10.167.125.8610.167.125.86
8810.167.125.87/3210.167.125.87 – 10.167.125.8710.167.125.87
8910.167.125.88/3210.167.125.88 – 10.167.125.8810.167.125.88
9010.167.125.89/3210.167.125.89 – 10.167.125.8910.167.125.89
9110.167.125.90/3210.167.125.90 – 10.167.125.9010.167.125.90
9210.167.125.91/3210.167.125.91 – 10.167.125.9110.167.125.91
9310.167.125.92/3210.167.125.92 – 10.167.125.9210.167.125.92
9410.167.125.93/3210.167.125.93 – 10.167.125.9310.167.125.93
9510.167.125.94/3210.167.125.94 – 10.167.125.9410.167.125.94
9610.167.125.95/3210.167.125.95 – 10.167.125.9510.167.125.95
9710.167.125.96/3210.167.125.96 – 10.167.125.9610.167.125.96
9810.167.125.97/3210.167.125.97 – 10.167.125.9710.167.125.97
9910.167.125.98/3210.167.125.98 – 10.167.125.9810.167.125.98
10010.167.125.99/3210.167.125.99 – 10.167.125.9910.167.125.99
10110.167.125.100/3210.167.125.100 – 10.167.125.10010.167.125.100
10210.167.125.101/3210.167.125.101 – 10.167.125.10110.167.125.101
10310.167.125.102/3210.167.125.102 – 10.167.125.10210.167.125.102
10410.167.125.103/3210.167.125.103 – 10.167.125.10310.167.125.103
10510.167.125.104/3210.167.125.104 – 10.167.125.10410.167.125.104
10610.167.125.105/3210.167.125.105 – 10.167.125.10510.167.125.105
10710.167.125.106/3210.167.125.106 – 10.167.125.10610.167.125.106
10810.167.125.107/3210.167.125.107 – 10.167.125.10710.167.125.107
10910.167.125.108/3210.167.125.108 – 10.167.125.10810.167.125.108
11010.167.125.109/3210.167.125.109 – 10.167.125.10910.167.125.109
11110.167.125.110/3210.167.125.110 – 10.167.125.11010.167.125.110
11210.167.125.111/3210.167.125.111 – 10.167.125.11110.167.125.111
11310.167.125.112/3210.167.125.112 – 10.167.125.11210.167.125.112
11410.167.125.113/3210.167.125.113 – 10.167.125.11310.167.125.113
11510.167.125.114/3210.167.125.114 – 10.167.125.11410.167.125.114
11610.167.125.115/3210.167.125.115 – 10.167.125.11510.167.125.115
11710.167.125.116/3210.167.125.116 – 10.167.125.11610.167.125.116
11810.167.125.117/3210.167.125.117 – 10.167.125.11710.167.125.117
11910.167.125.118/3210.167.125.118 – 10.167.125.11810.167.125.118
12010.167.125.119/3210.167.125.119 – 10.167.125.11910.167.125.119
12110.167.125.120/3210.167.125.120 – 10.167.125.12010.167.125.120
12210.167.125.121/3210.167.125.121 – 10.167.125.12110.167.125.121
12310.167.125.122/3210.167.125.122 – 10.167.125.12210.167.125.122
12410.167.125.123/3210.167.125.123 – 10.167.125.12310.167.125.123
12510.167.125.124/3210.167.125.124 – 10.167.125.12410.167.125.124
12610.167.125.125/3210.167.125.125 – 10.167.125.12510.167.125.125
12710.167.125.126/3210.167.125.126 – 10.167.125.12610.167.125.126
12810.167.125.127/3210.167.125.127 – 10.167.125.12710.167.125.127
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 →