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)10.90.5.0/25
network10.90.5.0/25
broadcast10.90.5.127
first host10.90.5.1
last host10.90.5.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.90.5.0/25
address00001010.01011010.00000101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01011010.00000101.00000000
broadcast00001010.01011010.00000101.01111111
green = network part, grey = host part
hex0x0a5a0500
decimal173671680
reverse dns0.5.90.10.in-addr.arpa
ipv4-mapped::ffff:a5a:500

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.90.5.0/3210.90.5.0 – 10.90.5.010.90.5.0
210.90.5.1/3210.90.5.1 – 10.90.5.110.90.5.1
310.90.5.2/3210.90.5.2 – 10.90.5.210.90.5.2
410.90.5.3/3210.90.5.3 – 10.90.5.310.90.5.3
510.90.5.4/3210.90.5.4 – 10.90.5.410.90.5.4
610.90.5.5/3210.90.5.5 – 10.90.5.510.90.5.5
710.90.5.6/3210.90.5.6 – 10.90.5.610.90.5.6
810.90.5.7/3210.90.5.7 – 10.90.5.710.90.5.7
910.90.5.8/3210.90.5.8 – 10.90.5.810.90.5.8
1010.90.5.9/3210.90.5.9 – 10.90.5.910.90.5.9
1110.90.5.10/3210.90.5.10 – 10.90.5.1010.90.5.10
1210.90.5.11/3210.90.5.11 – 10.90.5.1110.90.5.11
1310.90.5.12/3210.90.5.12 – 10.90.5.1210.90.5.12
1410.90.5.13/3210.90.5.13 – 10.90.5.1310.90.5.13
1510.90.5.14/3210.90.5.14 – 10.90.5.1410.90.5.14
1610.90.5.15/3210.90.5.15 – 10.90.5.1510.90.5.15
1710.90.5.16/3210.90.5.16 – 10.90.5.1610.90.5.16
1810.90.5.17/3210.90.5.17 – 10.90.5.1710.90.5.17
1910.90.5.18/3210.90.5.18 – 10.90.5.1810.90.5.18
2010.90.5.19/3210.90.5.19 – 10.90.5.1910.90.5.19
2110.90.5.20/3210.90.5.20 – 10.90.5.2010.90.5.20
2210.90.5.21/3210.90.5.21 – 10.90.5.2110.90.5.21
2310.90.5.22/3210.90.5.22 – 10.90.5.2210.90.5.22
2410.90.5.23/3210.90.5.23 – 10.90.5.2310.90.5.23
2510.90.5.24/3210.90.5.24 – 10.90.5.2410.90.5.24
2610.90.5.25/3210.90.5.25 – 10.90.5.2510.90.5.25
2710.90.5.26/3210.90.5.26 – 10.90.5.2610.90.5.26
2810.90.5.27/3210.90.5.27 – 10.90.5.2710.90.5.27
2910.90.5.28/3210.90.5.28 – 10.90.5.2810.90.5.28
3010.90.5.29/3210.90.5.29 – 10.90.5.2910.90.5.29
3110.90.5.30/3210.90.5.30 – 10.90.5.3010.90.5.30
3210.90.5.31/3210.90.5.31 – 10.90.5.3110.90.5.31
3310.90.5.32/3210.90.5.32 – 10.90.5.3210.90.5.32
3410.90.5.33/3210.90.5.33 – 10.90.5.3310.90.5.33
3510.90.5.34/3210.90.5.34 – 10.90.5.3410.90.5.34
3610.90.5.35/3210.90.5.35 – 10.90.5.3510.90.5.35
3710.90.5.36/3210.90.5.36 – 10.90.5.3610.90.5.36
3810.90.5.37/3210.90.5.37 – 10.90.5.3710.90.5.37
3910.90.5.38/3210.90.5.38 – 10.90.5.3810.90.5.38
4010.90.5.39/3210.90.5.39 – 10.90.5.3910.90.5.39
4110.90.5.40/3210.90.5.40 – 10.90.5.4010.90.5.40
4210.90.5.41/3210.90.5.41 – 10.90.5.4110.90.5.41
4310.90.5.42/3210.90.5.42 – 10.90.5.4210.90.5.42
4410.90.5.43/3210.90.5.43 – 10.90.5.4310.90.5.43
4510.90.5.44/3210.90.5.44 – 10.90.5.4410.90.5.44
4610.90.5.45/3210.90.5.45 – 10.90.5.4510.90.5.45
4710.90.5.46/3210.90.5.46 – 10.90.5.4610.90.5.46
4810.90.5.47/3210.90.5.47 – 10.90.5.4710.90.5.47
4910.90.5.48/3210.90.5.48 – 10.90.5.4810.90.5.48
5010.90.5.49/3210.90.5.49 – 10.90.5.4910.90.5.49
5110.90.5.50/3210.90.5.50 – 10.90.5.5010.90.5.50
5210.90.5.51/3210.90.5.51 – 10.90.5.5110.90.5.51
5310.90.5.52/3210.90.5.52 – 10.90.5.5210.90.5.52
5410.90.5.53/3210.90.5.53 – 10.90.5.5310.90.5.53
5510.90.5.54/3210.90.5.54 – 10.90.5.5410.90.5.54
5610.90.5.55/3210.90.5.55 – 10.90.5.5510.90.5.55
5710.90.5.56/3210.90.5.56 – 10.90.5.5610.90.5.56
5810.90.5.57/3210.90.5.57 – 10.90.5.5710.90.5.57
5910.90.5.58/3210.90.5.58 – 10.90.5.5810.90.5.58
6010.90.5.59/3210.90.5.59 – 10.90.5.5910.90.5.59
6110.90.5.60/3210.90.5.60 – 10.90.5.6010.90.5.60
6210.90.5.61/3210.90.5.61 – 10.90.5.6110.90.5.61
6310.90.5.62/3210.90.5.62 – 10.90.5.6210.90.5.62
6410.90.5.63/3210.90.5.63 – 10.90.5.6310.90.5.63
6510.90.5.64/3210.90.5.64 – 10.90.5.6410.90.5.64
6610.90.5.65/3210.90.5.65 – 10.90.5.6510.90.5.65
6710.90.5.66/3210.90.5.66 – 10.90.5.6610.90.5.66
6810.90.5.67/3210.90.5.67 – 10.90.5.6710.90.5.67
6910.90.5.68/3210.90.5.68 – 10.90.5.6810.90.5.68
7010.90.5.69/3210.90.5.69 – 10.90.5.6910.90.5.69
7110.90.5.70/3210.90.5.70 – 10.90.5.7010.90.5.70
7210.90.5.71/3210.90.5.71 – 10.90.5.7110.90.5.71
7310.90.5.72/3210.90.5.72 – 10.90.5.7210.90.5.72
7410.90.5.73/3210.90.5.73 – 10.90.5.7310.90.5.73
7510.90.5.74/3210.90.5.74 – 10.90.5.7410.90.5.74
7610.90.5.75/3210.90.5.75 – 10.90.5.7510.90.5.75
7710.90.5.76/3210.90.5.76 – 10.90.5.7610.90.5.76
7810.90.5.77/3210.90.5.77 – 10.90.5.7710.90.5.77
7910.90.5.78/3210.90.5.78 – 10.90.5.7810.90.5.78
8010.90.5.79/3210.90.5.79 – 10.90.5.7910.90.5.79
8110.90.5.80/3210.90.5.80 – 10.90.5.8010.90.5.80
8210.90.5.81/3210.90.5.81 – 10.90.5.8110.90.5.81
8310.90.5.82/3210.90.5.82 – 10.90.5.8210.90.5.82
8410.90.5.83/3210.90.5.83 – 10.90.5.8310.90.5.83
8510.90.5.84/3210.90.5.84 – 10.90.5.8410.90.5.84
8610.90.5.85/3210.90.5.85 – 10.90.5.8510.90.5.85
8710.90.5.86/3210.90.5.86 – 10.90.5.8610.90.5.86
8810.90.5.87/3210.90.5.87 – 10.90.5.8710.90.5.87
8910.90.5.88/3210.90.5.88 – 10.90.5.8810.90.5.88
9010.90.5.89/3210.90.5.89 – 10.90.5.8910.90.5.89
9110.90.5.90/3210.90.5.90 – 10.90.5.9010.90.5.90
9210.90.5.91/3210.90.5.91 – 10.90.5.9110.90.5.91
9310.90.5.92/3210.90.5.92 – 10.90.5.9210.90.5.92
9410.90.5.93/3210.90.5.93 – 10.90.5.9310.90.5.93
9510.90.5.94/3210.90.5.94 – 10.90.5.9410.90.5.94
9610.90.5.95/3210.90.5.95 – 10.90.5.9510.90.5.95
9710.90.5.96/3210.90.5.96 – 10.90.5.9610.90.5.96
9810.90.5.97/3210.90.5.97 – 10.90.5.9710.90.5.97
9910.90.5.98/3210.90.5.98 – 10.90.5.9810.90.5.98
10010.90.5.99/3210.90.5.99 – 10.90.5.9910.90.5.99
10110.90.5.100/3210.90.5.100 – 10.90.5.10010.90.5.100
10210.90.5.101/3210.90.5.101 – 10.90.5.10110.90.5.101
10310.90.5.102/3210.90.5.102 – 10.90.5.10210.90.5.102
10410.90.5.103/3210.90.5.103 – 10.90.5.10310.90.5.103
10510.90.5.104/3210.90.5.104 – 10.90.5.10410.90.5.104
10610.90.5.105/3210.90.5.105 – 10.90.5.10510.90.5.105
10710.90.5.106/3210.90.5.106 – 10.90.5.10610.90.5.106
10810.90.5.107/3210.90.5.107 – 10.90.5.10710.90.5.107
10910.90.5.108/3210.90.5.108 – 10.90.5.10810.90.5.108
11010.90.5.109/3210.90.5.109 – 10.90.5.10910.90.5.109
11110.90.5.110/3210.90.5.110 – 10.90.5.11010.90.5.110
11210.90.5.111/3210.90.5.111 – 10.90.5.11110.90.5.111
11310.90.5.112/3210.90.5.112 – 10.90.5.11210.90.5.112
11410.90.5.113/3210.90.5.113 – 10.90.5.11310.90.5.113
11510.90.5.114/3210.90.5.114 – 10.90.5.11410.90.5.114
11610.90.5.115/3210.90.5.115 – 10.90.5.11510.90.5.115
11710.90.5.116/3210.90.5.116 – 10.90.5.11610.90.5.116
11810.90.5.117/3210.90.5.117 – 10.90.5.11710.90.5.117
11910.90.5.118/3210.90.5.118 – 10.90.5.11810.90.5.118
12010.90.5.119/3210.90.5.119 – 10.90.5.11910.90.5.119
12110.90.5.120/3210.90.5.120 – 10.90.5.12010.90.5.120
12210.90.5.121/3210.90.5.121 – 10.90.5.12110.90.5.121
12310.90.5.122/3210.90.5.122 – 10.90.5.12210.90.5.122
12410.90.5.123/3210.90.5.123 – 10.90.5.12310.90.5.123
12510.90.5.124/3210.90.5.124 – 10.90.5.12410.90.5.124
12610.90.5.125/3210.90.5.125 – 10.90.5.12510.90.5.125
12710.90.5.126/3210.90.5.126 – 10.90.5.12610.90.5.126
12810.90.5.127/3210.90.5.127 – 10.90.5.12710.90.5.127
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 →