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)10.2.109.0/25
network10.2.109.0/25
broadcast10.2.109.127
first host10.2.109.1
last host10.2.109.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.109.0/25
address00001010.00000010.01101101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.01101101.00000000
broadcast00001010.00000010.01101101.01111111
green = network part, grey = host part
hex0x0a026d00
decimal167931136
reverse dns0.109.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:6d00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.109.0/3210.2.109.0 – 10.2.109.010.2.109.0
210.2.109.1/3210.2.109.1 – 10.2.109.110.2.109.1
310.2.109.2/3210.2.109.2 – 10.2.109.210.2.109.2
410.2.109.3/3210.2.109.3 – 10.2.109.310.2.109.3
510.2.109.4/3210.2.109.4 – 10.2.109.410.2.109.4
610.2.109.5/3210.2.109.5 – 10.2.109.510.2.109.5
710.2.109.6/3210.2.109.6 – 10.2.109.610.2.109.6
810.2.109.7/3210.2.109.7 – 10.2.109.710.2.109.7
910.2.109.8/3210.2.109.8 – 10.2.109.810.2.109.8
1010.2.109.9/3210.2.109.9 – 10.2.109.910.2.109.9
1110.2.109.10/3210.2.109.10 – 10.2.109.1010.2.109.10
1210.2.109.11/3210.2.109.11 – 10.2.109.1110.2.109.11
1310.2.109.12/3210.2.109.12 – 10.2.109.1210.2.109.12
1410.2.109.13/3210.2.109.13 – 10.2.109.1310.2.109.13
1510.2.109.14/3210.2.109.14 – 10.2.109.1410.2.109.14
1610.2.109.15/3210.2.109.15 – 10.2.109.1510.2.109.15
1710.2.109.16/3210.2.109.16 – 10.2.109.1610.2.109.16
1810.2.109.17/3210.2.109.17 – 10.2.109.1710.2.109.17
1910.2.109.18/3210.2.109.18 – 10.2.109.1810.2.109.18
2010.2.109.19/3210.2.109.19 – 10.2.109.1910.2.109.19
2110.2.109.20/3210.2.109.20 – 10.2.109.2010.2.109.20
2210.2.109.21/3210.2.109.21 – 10.2.109.2110.2.109.21
2310.2.109.22/3210.2.109.22 – 10.2.109.2210.2.109.22
2410.2.109.23/3210.2.109.23 – 10.2.109.2310.2.109.23
2510.2.109.24/3210.2.109.24 – 10.2.109.2410.2.109.24
2610.2.109.25/3210.2.109.25 – 10.2.109.2510.2.109.25
2710.2.109.26/3210.2.109.26 – 10.2.109.2610.2.109.26
2810.2.109.27/3210.2.109.27 – 10.2.109.2710.2.109.27
2910.2.109.28/3210.2.109.28 – 10.2.109.2810.2.109.28
3010.2.109.29/3210.2.109.29 – 10.2.109.2910.2.109.29
3110.2.109.30/3210.2.109.30 – 10.2.109.3010.2.109.30
3210.2.109.31/3210.2.109.31 – 10.2.109.3110.2.109.31
3310.2.109.32/3210.2.109.32 – 10.2.109.3210.2.109.32
3410.2.109.33/3210.2.109.33 – 10.2.109.3310.2.109.33
3510.2.109.34/3210.2.109.34 – 10.2.109.3410.2.109.34
3610.2.109.35/3210.2.109.35 – 10.2.109.3510.2.109.35
3710.2.109.36/3210.2.109.36 – 10.2.109.3610.2.109.36
3810.2.109.37/3210.2.109.37 – 10.2.109.3710.2.109.37
3910.2.109.38/3210.2.109.38 – 10.2.109.3810.2.109.38
4010.2.109.39/3210.2.109.39 – 10.2.109.3910.2.109.39
4110.2.109.40/3210.2.109.40 – 10.2.109.4010.2.109.40
4210.2.109.41/3210.2.109.41 – 10.2.109.4110.2.109.41
4310.2.109.42/3210.2.109.42 – 10.2.109.4210.2.109.42
4410.2.109.43/3210.2.109.43 – 10.2.109.4310.2.109.43
4510.2.109.44/3210.2.109.44 – 10.2.109.4410.2.109.44
4610.2.109.45/3210.2.109.45 – 10.2.109.4510.2.109.45
4710.2.109.46/3210.2.109.46 – 10.2.109.4610.2.109.46
4810.2.109.47/3210.2.109.47 – 10.2.109.4710.2.109.47
4910.2.109.48/3210.2.109.48 – 10.2.109.4810.2.109.48
5010.2.109.49/3210.2.109.49 – 10.2.109.4910.2.109.49
5110.2.109.50/3210.2.109.50 – 10.2.109.5010.2.109.50
5210.2.109.51/3210.2.109.51 – 10.2.109.5110.2.109.51
5310.2.109.52/3210.2.109.52 – 10.2.109.5210.2.109.52
5410.2.109.53/3210.2.109.53 – 10.2.109.5310.2.109.53
5510.2.109.54/3210.2.109.54 – 10.2.109.5410.2.109.54
5610.2.109.55/3210.2.109.55 – 10.2.109.5510.2.109.55
5710.2.109.56/3210.2.109.56 – 10.2.109.5610.2.109.56
5810.2.109.57/3210.2.109.57 – 10.2.109.5710.2.109.57
5910.2.109.58/3210.2.109.58 – 10.2.109.5810.2.109.58
6010.2.109.59/3210.2.109.59 – 10.2.109.5910.2.109.59
6110.2.109.60/3210.2.109.60 – 10.2.109.6010.2.109.60
6210.2.109.61/3210.2.109.61 – 10.2.109.6110.2.109.61
6310.2.109.62/3210.2.109.62 – 10.2.109.6210.2.109.62
6410.2.109.63/3210.2.109.63 – 10.2.109.6310.2.109.63
6510.2.109.64/3210.2.109.64 – 10.2.109.6410.2.109.64
6610.2.109.65/3210.2.109.65 – 10.2.109.6510.2.109.65
6710.2.109.66/3210.2.109.66 – 10.2.109.6610.2.109.66
6810.2.109.67/3210.2.109.67 – 10.2.109.6710.2.109.67
6910.2.109.68/3210.2.109.68 – 10.2.109.6810.2.109.68
7010.2.109.69/3210.2.109.69 – 10.2.109.6910.2.109.69
7110.2.109.70/3210.2.109.70 – 10.2.109.7010.2.109.70
7210.2.109.71/3210.2.109.71 – 10.2.109.7110.2.109.71
7310.2.109.72/3210.2.109.72 – 10.2.109.7210.2.109.72
7410.2.109.73/3210.2.109.73 – 10.2.109.7310.2.109.73
7510.2.109.74/3210.2.109.74 – 10.2.109.7410.2.109.74
7610.2.109.75/3210.2.109.75 – 10.2.109.7510.2.109.75
7710.2.109.76/3210.2.109.76 – 10.2.109.7610.2.109.76
7810.2.109.77/3210.2.109.77 – 10.2.109.7710.2.109.77
7910.2.109.78/3210.2.109.78 – 10.2.109.7810.2.109.78
8010.2.109.79/3210.2.109.79 – 10.2.109.7910.2.109.79
8110.2.109.80/3210.2.109.80 – 10.2.109.8010.2.109.80
8210.2.109.81/3210.2.109.81 – 10.2.109.8110.2.109.81
8310.2.109.82/3210.2.109.82 – 10.2.109.8210.2.109.82
8410.2.109.83/3210.2.109.83 – 10.2.109.8310.2.109.83
8510.2.109.84/3210.2.109.84 – 10.2.109.8410.2.109.84
8610.2.109.85/3210.2.109.85 – 10.2.109.8510.2.109.85
8710.2.109.86/3210.2.109.86 – 10.2.109.8610.2.109.86
8810.2.109.87/3210.2.109.87 – 10.2.109.8710.2.109.87
8910.2.109.88/3210.2.109.88 – 10.2.109.8810.2.109.88
9010.2.109.89/3210.2.109.89 – 10.2.109.8910.2.109.89
9110.2.109.90/3210.2.109.90 – 10.2.109.9010.2.109.90
9210.2.109.91/3210.2.109.91 – 10.2.109.9110.2.109.91
9310.2.109.92/3210.2.109.92 – 10.2.109.9210.2.109.92
9410.2.109.93/3210.2.109.93 – 10.2.109.9310.2.109.93
9510.2.109.94/3210.2.109.94 – 10.2.109.9410.2.109.94
9610.2.109.95/3210.2.109.95 – 10.2.109.9510.2.109.95
9710.2.109.96/3210.2.109.96 – 10.2.109.9610.2.109.96
9810.2.109.97/3210.2.109.97 – 10.2.109.9710.2.109.97
9910.2.109.98/3210.2.109.98 – 10.2.109.9810.2.109.98
10010.2.109.99/3210.2.109.99 – 10.2.109.9910.2.109.99
10110.2.109.100/3210.2.109.100 – 10.2.109.10010.2.109.100
10210.2.109.101/3210.2.109.101 – 10.2.109.10110.2.109.101
10310.2.109.102/3210.2.109.102 – 10.2.109.10210.2.109.102
10410.2.109.103/3210.2.109.103 – 10.2.109.10310.2.109.103
10510.2.109.104/3210.2.109.104 – 10.2.109.10410.2.109.104
10610.2.109.105/3210.2.109.105 – 10.2.109.10510.2.109.105
10710.2.109.106/3210.2.109.106 – 10.2.109.10610.2.109.106
10810.2.109.107/3210.2.109.107 – 10.2.109.10710.2.109.107
10910.2.109.108/3210.2.109.108 – 10.2.109.10810.2.109.108
11010.2.109.109/3210.2.109.109 – 10.2.109.10910.2.109.109
11110.2.109.110/3210.2.109.110 – 10.2.109.11010.2.109.110
11210.2.109.111/3210.2.109.111 – 10.2.109.11110.2.109.111
11310.2.109.112/3210.2.109.112 – 10.2.109.11210.2.109.112
11410.2.109.113/3210.2.109.113 – 10.2.109.11310.2.109.113
11510.2.109.114/3210.2.109.114 – 10.2.109.11410.2.109.114
11610.2.109.115/3210.2.109.115 – 10.2.109.11510.2.109.115
11710.2.109.116/3210.2.109.116 – 10.2.109.11610.2.109.116
11810.2.109.117/3210.2.109.117 – 10.2.109.11710.2.109.117
11910.2.109.118/3210.2.109.118 – 10.2.109.11810.2.109.118
12010.2.109.119/3210.2.109.119 – 10.2.109.11910.2.109.119
12110.2.109.120/3210.2.109.120 – 10.2.109.12010.2.109.120
12210.2.109.121/3210.2.109.121 – 10.2.109.12110.2.109.121
12310.2.109.122/3210.2.109.122 – 10.2.109.12210.2.109.122
12410.2.109.123/3210.2.109.123 – 10.2.109.12310.2.109.123
12510.2.109.124/3210.2.109.124 – 10.2.109.12410.2.109.124
12610.2.109.125/3210.2.109.125 – 10.2.109.12510.2.109.125
12710.2.109.126/3210.2.109.126 – 10.2.109.12610.2.109.126
12810.2.109.127/3210.2.109.127 – 10.2.109.12710.2.109.127
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 →