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)10.2.33.0/25
network10.2.33.0/25
broadcast10.2.33.127
first host10.2.33.1
last host10.2.33.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.33.0/25
address00001010.00000010.00100001.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00100001.00000000
broadcast00001010.00000010.00100001.01111111
green = network part, grey = host part
hex0x0a022100
decimal167911680
reverse dns0.33.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:2100

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.33.0/3210.2.33.0 – 10.2.33.010.2.33.0
210.2.33.1/3210.2.33.1 – 10.2.33.110.2.33.1
310.2.33.2/3210.2.33.2 – 10.2.33.210.2.33.2
410.2.33.3/3210.2.33.3 – 10.2.33.310.2.33.3
510.2.33.4/3210.2.33.4 – 10.2.33.410.2.33.4
610.2.33.5/3210.2.33.5 – 10.2.33.510.2.33.5
710.2.33.6/3210.2.33.6 – 10.2.33.610.2.33.6
810.2.33.7/3210.2.33.7 – 10.2.33.710.2.33.7
910.2.33.8/3210.2.33.8 – 10.2.33.810.2.33.8
1010.2.33.9/3210.2.33.9 – 10.2.33.910.2.33.9
1110.2.33.10/3210.2.33.10 – 10.2.33.1010.2.33.10
1210.2.33.11/3210.2.33.11 – 10.2.33.1110.2.33.11
1310.2.33.12/3210.2.33.12 – 10.2.33.1210.2.33.12
1410.2.33.13/3210.2.33.13 – 10.2.33.1310.2.33.13
1510.2.33.14/3210.2.33.14 – 10.2.33.1410.2.33.14
1610.2.33.15/3210.2.33.15 – 10.2.33.1510.2.33.15
1710.2.33.16/3210.2.33.16 – 10.2.33.1610.2.33.16
1810.2.33.17/3210.2.33.17 – 10.2.33.1710.2.33.17
1910.2.33.18/3210.2.33.18 – 10.2.33.1810.2.33.18
2010.2.33.19/3210.2.33.19 – 10.2.33.1910.2.33.19
2110.2.33.20/3210.2.33.20 – 10.2.33.2010.2.33.20
2210.2.33.21/3210.2.33.21 – 10.2.33.2110.2.33.21
2310.2.33.22/3210.2.33.22 – 10.2.33.2210.2.33.22
2410.2.33.23/3210.2.33.23 – 10.2.33.2310.2.33.23
2510.2.33.24/3210.2.33.24 – 10.2.33.2410.2.33.24
2610.2.33.25/3210.2.33.25 – 10.2.33.2510.2.33.25
2710.2.33.26/3210.2.33.26 – 10.2.33.2610.2.33.26
2810.2.33.27/3210.2.33.27 – 10.2.33.2710.2.33.27
2910.2.33.28/3210.2.33.28 – 10.2.33.2810.2.33.28
3010.2.33.29/3210.2.33.29 – 10.2.33.2910.2.33.29
3110.2.33.30/3210.2.33.30 – 10.2.33.3010.2.33.30
3210.2.33.31/3210.2.33.31 – 10.2.33.3110.2.33.31
3310.2.33.32/3210.2.33.32 – 10.2.33.3210.2.33.32
3410.2.33.33/3210.2.33.33 – 10.2.33.3310.2.33.33
3510.2.33.34/3210.2.33.34 – 10.2.33.3410.2.33.34
3610.2.33.35/3210.2.33.35 – 10.2.33.3510.2.33.35
3710.2.33.36/3210.2.33.36 – 10.2.33.3610.2.33.36
3810.2.33.37/3210.2.33.37 – 10.2.33.3710.2.33.37
3910.2.33.38/3210.2.33.38 – 10.2.33.3810.2.33.38
4010.2.33.39/3210.2.33.39 – 10.2.33.3910.2.33.39
4110.2.33.40/3210.2.33.40 – 10.2.33.4010.2.33.40
4210.2.33.41/3210.2.33.41 – 10.2.33.4110.2.33.41
4310.2.33.42/3210.2.33.42 – 10.2.33.4210.2.33.42
4410.2.33.43/3210.2.33.43 – 10.2.33.4310.2.33.43
4510.2.33.44/3210.2.33.44 – 10.2.33.4410.2.33.44
4610.2.33.45/3210.2.33.45 – 10.2.33.4510.2.33.45
4710.2.33.46/3210.2.33.46 – 10.2.33.4610.2.33.46
4810.2.33.47/3210.2.33.47 – 10.2.33.4710.2.33.47
4910.2.33.48/3210.2.33.48 – 10.2.33.4810.2.33.48
5010.2.33.49/3210.2.33.49 – 10.2.33.4910.2.33.49
5110.2.33.50/3210.2.33.50 – 10.2.33.5010.2.33.50
5210.2.33.51/3210.2.33.51 – 10.2.33.5110.2.33.51
5310.2.33.52/3210.2.33.52 – 10.2.33.5210.2.33.52
5410.2.33.53/3210.2.33.53 – 10.2.33.5310.2.33.53
5510.2.33.54/3210.2.33.54 – 10.2.33.5410.2.33.54
5610.2.33.55/3210.2.33.55 – 10.2.33.5510.2.33.55
5710.2.33.56/3210.2.33.56 – 10.2.33.5610.2.33.56
5810.2.33.57/3210.2.33.57 – 10.2.33.5710.2.33.57
5910.2.33.58/3210.2.33.58 – 10.2.33.5810.2.33.58
6010.2.33.59/3210.2.33.59 – 10.2.33.5910.2.33.59
6110.2.33.60/3210.2.33.60 – 10.2.33.6010.2.33.60
6210.2.33.61/3210.2.33.61 – 10.2.33.6110.2.33.61
6310.2.33.62/3210.2.33.62 – 10.2.33.6210.2.33.62
6410.2.33.63/3210.2.33.63 – 10.2.33.6310.2.33.63
6510.2.33.64/3210.2.33.64 – 10.2.33.6410.2.33.64
6610.2.33.65/3210.2.33.65 – 10.2.33.6510.2.33.65
6710.2.33.66/3210.2.33.66 – 10.2.33.6610.2.33.66
6810.2.33.67/3210.2.33.67 – 10.2.33.6710.2.33.67
6910.2.33.68/3210.2.33.68 – 10.2.33.6810.2.33.68
7010.2.33.69/3210.2.33.69 – 10.2.33.6910.2.33.69
7110.2.33.70/3210.2.33.70 – 10.2.33.7010.2.33.70
7210.2.33.71/3210.2.33.71 – 10.2.33.7110.2.33.71
7310.2.33.72/3210.2.33.72 – 10.2.33.7210.2.33.72
7410.2.33.73/3210.2.33.73 – 10.2.33.7310.2.33.73
7510.2.33.74/3210.2.33.74 – 10.2.33.7410.2.33.74
7610.2.33.75/3210.2.33.75 – 10.2.33.7510.2.33.75
7710.2.33.76/3210.2.33.76 – 10.2.33.7610.2.33.76
7810.2.33.77/3210.2.33.77 – 10.2.33.7710.2.33.77
7910.2.33.78/3210.2.33.78 – 10.2.33.7810.2.33.78
8010.2.33.79/3210.2.33.79 – 10.2.33.7910.2.33.79
8110.2.33.80/3210.2.33.80 – 10.2.33.8010.2.33.80
8210.2.33.81/3210.2.33.81 – 10.2.33.8110.2.33.81
8310.2.33.82/3210.2.33.82 – 10.2.33.8210.2.33.82
8410.2.33.83/3210.2.33.83 – 10.2.33.8310.2.33.83
8510.2.33.84/3210.2.33.84 – 10.2.33.8410.2.33.84
8610.2.33.85/3210.2.33.85 – 10.2.33.8510.2.33.85
8710.2.33.86/3210.2.33.86 – 10.2.33.8610.2.33.86
8810.2.33.87/3210.2.33.87 – 10.2.33.8710.2.33.87
8910.2.33.88/3210.2.33.88 – 10.2.33.8810.2.33.88
9010.2.33.89/3210.2.33.89 – 10.2.33.8910.2.33.89
9110.2.33.90/3210.2.33.90 – 10.2.33.9010.2.33.90
9210.2.33.91/3210.2.33.91 – 10.2.33.9110.2.33.91
9310.2.33.92/3210.2.33.92 – 10.2.33.9210.2.33.92
9410.2.33.93/3210.2.33.93 – 10.2.33.9310.2.33.93
9510.2.33.94/3210.2.33.94 – 10.2.33.9410.2.33.94
9610.2.33.95/3210.2.33.95 – 10.2.33.9510.2.33.95
9710.2.33.96/3210.2.33.96 – 10.2.33.9610.2.33.96
9810.2.33.97/3210.2.33.97 – 10.2.33.9710.2.33.97
9910.2.33.98/3210.2.33.98 – 10.2.33.9810.2.33.98
10010.2.33.99/3210.2.33.99 – 10.2.33.9910.2.33.99
10110.2.33.100/3210.2.33.100 – 10.2.33.10010.2.33.100
10210.2.33.101/3210.2.33.101 – 10.2.33.10110.2.33.101
10310.2.33.102/3210.2.33.102 – 10.2.33.10210.2.33.102
10410.2.33.103/3210.2.33.103 – 10.2.33.10310.2.33.103
10510.2.33.104/3210.2.33.104 – 10.2.33.10410.2.33.104
10610.2.33.105/3210.2.33.105 – 10.2.33.10510.2.33.105
10710.2.33.106/3210.2.33.106 – 10.2.33.10610.2.33.106
10810.2.33.107/3210.2.33.107 – 10.2.33.10710.2.33.107
10910.2.33.108/3210.2.33.108 – 10.2.33.10810.2.33.108
11010.2.33.109/3210.2.33.109 – 10.2.33.10910.2.33.109
11110.2.33.110/3210.2.33.110 – 10.2.33.11010.2.33.110
11210.2.33.111/3210.2.33.111 – 10.2.33.11110.2.33.111
11310.2.33.112/3210.2.33.112 – 10.2.33.11210.2.33.112
11410.2.33.113/3210.2.33.113 – 10.2.33.11310.2.33.113
11510.2.33.114/3210.2.33.114 – 10.2.33.11410.2.33.114
11610.2.33.115/3210.2.33.115 – 10.2.33.11510.2.33.115
11710.2.33.116/3210.2.33.116 – 10.2.33.11610.2.33.116
11810.2.33.117/3210.2.33.117 – 10.2.33.11710.2.33.117
11910.2.33.118/3210.2.33.118 – 10.2.33.11810.2.33.118
12010.2.33.119/3210.2.33.119 – 10.2.33.11910.2.33.119
12110.2.33.120/3210.2.33.120 – 10.2.33.12010.2.33.120
12210.2.33.121/3210.2.33.121 – 10.2.33.12110.2.33.121
12310.2.33.122/3210.2.33.122 – 10.2.33.12210.2.33.122
12410.2.33.123/3210.2.33.123 – 10.2.33.12310.2.33.123
12510.2.33.124/3210.2.33.124 – 10.2.33.12410.2.33.124
12610.2.33.125/3210.2.33.125 – 10.2.33.12510.2.33.125
12710.2.33.126/3210.2.33.126 – 10.2.33.12610.2.33.126
12810.2.33.127/3210.2.33.127 – 10.2.33.12710.2.33.127
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 →