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)10.3.57.0/25
network10.3.57.0/25
broadcast10.3.57.127
first host10.3.57.1
last host10.3.57.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.3.57.0/25
address00001010.00000011.00111001.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000011.00111001.00000000
broadcast00001010.00000011.00111001.01111111
green = network part, grey = host part
hex0x0a033900
decimal167983360
reverse dns0.57.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:3900

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.57.0/3210.3.57.0 – 10.3.57.010.3.57.0
210.3.57.1/3210.3.57.1 – 10.3.57.110.3.57.1
310.3.57.2/3210.3.57.2 – 10.3.57.210.3.57.2
410.3.57.3/3210.3.57.3 – 10.3.57.310.3.57.3
510.3.57.4/3210.3.57.4 – 10.3.57.410.3.57.4
610.3.57.5/3210.3.57.5 – 10.3.57.510.3.57.5
710.3.57.6/3210.3.57.6 – 10.3.57.610.3.57.6
810.3.57.7/3210.3.57.7 – 10.3.57.710.3.57.7
910.3.57.8/3210.3.57.8 – 10.3.57.810.3.57.8
1010.3.57.9/3210.3.57.9 – 10.3.57.910.3.57.9
1110.3.57.10/3210.3.57.10 – 10.3.57.1010.3.57.10
1210.3.57.11/3210.3.57.11 – 10.3.57.1110.3.57.11
1310.3.57.12/3210.3.57.12 – 10.3.57.1210.3.57.12
1410.3.57.13/3210.3.57.13 – 10.3.57.1310.3.57.13
1510.3.57.14/3210.3.57.14 – 10.3.57.1410.3.57.14
1610.3.57.15/3210.3.57.15 – 10.3.57.1510.3.57.15
1710.3.57.16/3210.3.57.16 – 10.3.57.1610.3.57.16
1810.3.57.17/3210.3.57.17 – 10.3.57.1710.3.57.17
1910.3.57.18/3210.3.57.18 – 10.3.57.1810.3.57.18
2010.3.57.19/3210.3.57.19 – 10.3.57.1910.3.57.19
2110.3.57.20/3210.3.57.20 – 10.3.57.2010.3.57.20
2210.3.57.21/3210.3.57.21 – 10.3.57.2110.3.57.21
2310.3.57.22/3210.3.57.22 – 10.3.57.2210.3.57.22
2410.3.57.23/3210.3.57.23 – 10.3.57.2310.3.57.23
2510.3.57.24/3210.3.57.24 – 10.3.57.2410.3.57.24
2610.3.57.25/3210.3.57.25 – 10.3.57.2510.3.57.25
2710.3.57.26/3210.3.57.26 – 10.3.57.2610.3.57.26
2810.3.57.27/3210.3.57.27 – 10.3.57.2710.3.57.27
2910.3.57.28/3210.3.57.28 – 10.3.57.2810.3.57.28
3010.3.57.29/3210.3.57.29 – 10.3.57.2910.3.57.29
3110.3.57.30/3210.3.57.30 – 10.3.57.3010.3.57.30
3210.3.57.31/3210.3.57.31 – 10.3.57.3110.3.57.31
3310.3.57.32/3210.3.57.32 – 10.3.57.3210.3.57.32
3410.3.57.33/3210.3.57.33 – 10.3.57.3310.3.57.33
3510.3.57.34/3210.3.57.34 – 10.3.57.3410.3.57.34
3610.3.57.35/3210.3.57.35 – 10.3.57.3510.3.57.35
3710.3.57.36/3210.3.57.36 – 10.3.57.3610.3.57.36
3810.3.57.37/3210.3.57.37 – 10.3.57.3710.3.57.37
3910.3.57.38/3210.3.57.38 – 10.3.57.3810.3.57.38
4010.3.57.39/3210.3.57.39 – 10.3.57.3910.3.57.39
4110.3.57.40/3210.3.57.40 – 10.3.57.4010.3.57.40
4210.3.57.41/3210.3.57.41 – 10.3.57.4110.3.57.41
4310.3.57.42/3210.3.57.42 – 10.3.57.4210.3.57.42
4410.3.57.43/3210.3.57.43 – 10.3.57.4310.3.57.43
4510.3.57.44/3210.3.57.44 – 10.3.57.4410.3.57.44
4610.3.57.45/3210.3.57.45 – 10.3.57.4510.3.57.45
4710.3.57.46/3210.3.57.46 – 10.3.57.4610.3.57.46
4810.3.57.47/3210.3.57.47 – 10.3.57.4710.3.57.47
4910.3.57.48/3210.3.57.48 – 10.3.57.4810.3.57.48
5010.3.57.49/3210.3.57.49 – 10.3.57.4910.3.57.49
5110.3.57.50/3210.3.57.50 – 10.3.57.5010.3.57.50
5210.3.57.51/3210.3.57.51 – 10.3.57.5110.3.57.51
5310.3.57.52/3210.3.57.52 – 10.3.57.5210.3.57.52
5410.3.57.53/3210.3.57.53 – 10.3.57.5310.3.57.53
5510.3.57.54/3210.3.57.54 – 10.3.57.5410.3.57.54
5610.3.57.55/3210.3.57.55 – 10.3.57.5510.3.57.55
5710.3.57.56/3210.3.57.56 – 10.3.57.5610.3.57.56
5810.3.57.57/3210.3.57.57 – 10.3.57.5710.3.57.57
5910.3.57.58/3210.3.57.58 – 10.3.57.5810.3.57.58
6010.3.57.59/3210.3.57.59 – 10.3.57.5910.3.57.59
6110.3.57.60/3210.3.57.60 – 10.3.57.6010.3.57.60
6210.3.57.61/3210.3.57.61 – 10.3.57.6110.3.57.61
6310.3.57.62/3210.3.57.62 – 10.3.57.6210.3.57.62
6410.3.57.63/3210.3.57.63 – 10.3.57.6310.3.57.63
6510.3.57.64/3210.3.57.64 – 10.3.57.6410.3.57.64
6610.3.57.65/3210.3.57.65 – 10.3.57.6510.3.57.65
6710.3.57.66/3210.3.57.66 – 10.3.57.6610.3.57.66
6810.3.57.67/3210.3.57.67 – 10.3.57.6710.3.57.67
6910.3.57.68/3210.3.57.68 – 10.3.57.6810.3.57.68
7010.3.57.69/3210.3.57.69 – 10.3.57.6910.3.57.69
7110.3.57.70/3210.3.57.70 – 10.3.57.7010.3.57.70
7210.3.57.71/3210.3.57.71 – 10.3.57.7110.3.57.71
7310.3.57.72/3210.3.57.72 – 10.3.57.7210.3.57.72
7410.3.57.73/3210.3.57.73 – 10.3.57.7310.3.57.73
7510.3.57.74/3210.3.57.74 – 10.3.57.7410.3.57.74
7610.3.57.75/3210.3.57.75 – 10.3.57.7510.3.57.75
7710.3.57.76/3210.3.57.76 – 10.3.57.7610.3.57.76
7810.3.57.77/3210.3.57.77 – 10.3.57.7710.3.57.77
7910.3.57.78/3210.3.57.78 – 10.3.57.7810.3.57.78
8010.3.57.79/3210.3.57.79 – 10.3.57.7910.3.57.79
8110.3.57.80/3210.3.57.80 – 10.3.57.8010.3.57.80
8210.3.57.81/3210.3.57.81 – 10.3.57.8110.3.57.81
8310.3.57.82/3210.3.57.82 – 10.3.57.8210.3.57.82
8410.3.57.83/3210.3.57.83 – 10.3.57.8310.3.57.83
8510.3.57.84/3210.3.57.84 – 10.3.57.8410.3.57.84
8610.3.57.85/3210.3.57.85 – 10.3.57.8510.3.57.85
8710.3.57.86/3210.3.57.86 – 10.3.57.8610.3.57.86
8810.3.57.87/3210.3.57.87 – 10.3.57.8710.3.57.87
8910.3.57.88/3210.3.57.88 – 10.3.57.8810.3.57.88
9010.3.57.89/3210.3.57.89 – 10.3.57.8910.3.57.89
9110.3.57.90/3210.3.57.90 – 10.3.57.9010.3.57.90
9210.3.57.91/3210.3.57.91 – 10.3.57.9110.3.57.91
9310.3.57.92/3210.3.57.92 – 10.3.57.9210.3.57.92
9410.3.57.93/3210.3.57.93 – 10.3.57.9310.3.57.93
9510.3.57.94/3210.3.57.94 – 10.3.57.9410.3.57.94
9610.3.57.95/3210.3.57.95 – 10.3.57.9510.3.57.95
9710.3.57.96/3210.3.57.96 – 10.3.57.9610.3.57.96
9810.3.57.97/3210.3.57.97 – 10.3.57.9710.3.57.97
9910.3.57.98/3210.3.57.98 – 10.3.57.9810.3.57.98
10010.3.57.99/3210.3.57.99 – 10.3.57.9910.3.57.99
10110.3.57.100/3210.3.57.100 – 10.3.57.10010.3.57.100
10210.3.57.101/3210.3.57.101 – 10.3.57.10110.3.57.101
10310.3.57.102/3210.3.57.102 – 10.3.57.10210.3.57.102
10410.3.57.103/3210.3.57.103 – 10.3.57.10310.3.57.103
10510.3.57.104/3210.3.57.104 – 10.3.57.10410.3.57.104
10610.3.57.105/3210.3.57.105 – 10.3.57.10510.3.57.105
10710.3.57.106/3210.3.57.106 – 10.3.57.10610.3.57.106
10810.3.57.107/3210.3.57.107 – 10.3.57.10710.3.57.107
10910.3.57.108/3210.3.57.108 – 10.3.57.10810.3.57.108
11010.3.57.109/3210.3.57.109 – 10.3.57.10910.3.57.109
11110.3.57.110/3210.3.57.110 – 10.3.57.11010.3.57.110
11210.3.57.111/3210.3.57.111 – 10.3.57.11110.3.57.111
11310.3.57.112/3210.3.57.112 – 10.3.57.11210.3.57.112
11410.3.57.113/3210.3.57.113 – 10.3.57.11310.3.57.113
11510.3.57.114/3210.3.57.114 – 10.3.57.11410.3.57.114
11610.3.57.115/3210.3.57.115 – 10.3.57.11510.3.57.115
11710.3.57.116/3210.3.57.116 – 10.3.57.11610.3.57.116
11810.3.57.117/3210.3.57.117 – 10.3.57.11710.3.57.117
11910.3.57.118/3210.3.57.118 – 10.3.57.11810.3.57.118
12010.3.57.119/3210.3.57.119 – 10.3.57.11910.3.57.119
12110.3.57.120/3210.3.57.120 – 10.3.57.12010.3.57.120
12210.3.57.121/3210.3.57.121 – 10.3.57.12110.3.57.121
12310.3.57.122/3210.3.57.122 – 10.3.57.12210.3.57.122
12410.3.57.123/3210.3.57.123 – 10.3.57.12310.3.57.123
12510.3.57.124/3210.3.57.124 – 10.3.57.12410.3.57.124
12610.3.57.125/3210.3.57.125 – 10.3.57.12510.3.57.125
12710.3.57.126/3210.3.57.126 – 10.3.57.12610.3.57.126
12810.3.57.127/3210.3.57.127 – 10.3.57.12710.3.57.127
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 →