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
private IP (RFC 1918)10.201.131.0/25
network10.201.131.0/25
broadcast10.201.131.127
first host10.201.131.1
last host10.201.131.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.201.131.0/25
address00001010.11001001.10000011.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.11001001.10000011.00000000
broadcast00001010.11001001.10000011.01111111
green = network part, grey = host part
hex0x0ac98300
decimal180978432
reverse dns0.131.201.10.in-addr.arpa
ipv4-mapped::ffff:ac9:8300

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.201.131.0/3210.201.131.0 – 10.201.131.010.201.131.0
210.201.131.1/3210.201.131.1 – 10.201.131.110.201.131.1
310.201.131.2/3210.201.131.2 – 10.201.131.210.201.131.2
410.201.131.3/3210.201.131.3 – 10.201.131.310.201.131.3
510.201.131.4/3210.201.131.4 – 10.201.131.410.201.131.4
610.201.131.5/3210.201.131.5 – 10.201.131.510.201.131.5
710.201.131.6/3210.201.131.6 – 10.201.131.610.201.131.6
810.201.131.7/3210.201.131.7 – 10.201.131.710.201.131.7
910.201.131.8/3210.201.131.8 – 10.201.131.810.201.131.8
1010.201.131.9/3210.201.131.9 – 10.201.131.910.201.131.9
1110.201.131.10/3210.201.131.10 – 10.201.131.1010.201.131.10
1210.201.131.11/3210.201.131.11 – 10.201.131.1110.201.131.11
1310.201.131.12/3210.201.131.12 – 10.201.131.1210.201.131.12
1410.201.131.13/3210.201.131.13 – 10.201.131.1310.201.131.13
1510.201.131.14/3210.201.131.14 – 10.201.131.1410.201.131.14
1610.201.131.15/3210.201.131.15 – 10.201.131.1510.201.131.15
1710.201.131.16/3210.201.131.16 – 10.201.131.1610.201.131.16
1810.201.131.17/3210.201.131.17 – 10.201.131.1710.201.131.17
1910.201.131.18/3210.201.131.18 – 10.201.131.1810.201.131.18
2010.201.131.19/3210.201.131.19 – 10.201.131.1910.201.131.19
2110.201.131.20/3210.201.131.20 – 10.201.131.2010.201.131.20
2210.201.131.21/3210.201.131.21 – 10.201.131.2110.201.131.21
2310.201.131.22/3210.201.131.22 – 10.201.131.2210.201.131.22
2410.201.131.23/3210.201.131.23 – 10.201.131.2310.201.131.23
2510.201.131.24/3210.201.131.24 – 10.201.131.2410.201.131.24
2610.201.131.25/3210.201.131.25 – 10.201.131.2510.201.131.25
2710.201.131.26/3210.201.131.26 – 10.201.131.2610.201.131.26
2810.201.131.27/3210.201.131.27 – 10.201.131.2710.201.131.27
2910.201.131.28/3210.201.131.28 – 10.201.131.2810.201.131.28
3010.201.131.29/3210.201.131.29 – 10.201.131.2910.201.131.29
3110.201.131.30/3210.201.131.30 – 10.201.131.3010.201.131.30
3210.201.131.31/3210.201.131.31 – 10.201.131.3110.201.131.31
3310.201.131.32/3210.201.131.32 – 10.201.131.3210.201.131.32
3410.201.131.33/3210.201.131.33 – 10.201.131.3310.201.131.33
3510.201.131.34/3210.201.131.34 – 10.201.131.3410.201.131.34
3610.201.131.35/3210.201.131.35 – 10.201.131.3510.201.131.35
3710.201.131.36/3210.201.131.36 – 10.201.131.3610.201.131.36
3810.201.131.37/3210.201.131.37 – 10.201.131.3710.201.131.37
3910.201.131.38/3210.201.131.38 – 10.201.131.3810.201.131.38
4010.201.131.39/3210.201.131.39 – 10.201.131.3910.201.131.39
4110.201.131.40/3210.201.131.40 – 10.201.131.4010.201.131.40
4210.201.131.41/3210.201.131.41 – 10.201.131.4110.201.131.41
4310.201.131.42/3210.201.131.42 – 10.201.131.4210.201.131.42
4410.201.131.43/3210.201.131.43 – 10.201.131.4310.201.131.43
4510.201.131.44/3210.201.131.44 – 10.201.131.4410.201.131.44
4610.201.131.45/3210.201.131.45 – 10.201.131.4510.201.131.45
4710.201.131.46/3210.201.131.46 – 10.201.131.4610.201.131.46
4810.201.131.47/3210.201.131.47 – 10.201.131.4710.201.131.47
4910.201.131.48/3210.201.131.48 – 10.201.131.4810.201.131.48
5010.201.131.49/3210.201.131.49 – 10.201.131.4910.201.131.49
5110.201.131.50/3210.201.131.50 – 10.201.131.5010.201.131.50
5210.201.131.51/3210.201.131.51 – 10.201.131.5110.201.131.51
5310.201.131.52/3210.201.131.52 – 10.201.131.5210.201.131.52
5410.201.131.53/3210.201.131.53 – 10.201.131.5310.201.131.53
5510.201.131.54/3210.201.131.54 – 10.201.131.5410.201.131.54
5610.201.131.55/3210.201.131.55 – 10.201.131.5510.201.131.55
5710.201.131.56/3210.201.131.56 – 10.201.131.5610.201.131.56
5810.201.131.57/3210.201.131.57 – 10.201.131.5710.201.131.57
5910.201.131.58/3210.201.131.58 – 10.201.131.5810.201.131.58
6010.201.131.59/3210.201.131.59 – 10.201.131.5910.201.131.59
6110.201.131.60/3210.201.131.60 – 10.201.131.6010.201.131.60
6210.201.131.61/3210.201.131.61 – 10.201.131.6110.201.131.61
6310.201.131.62/3210.201.131.62 – 10.201.131.6210.201.131.62
6410.201.131.63/3210.201.131.63 – 10.201.131.6310.201.131.63
6510.201.131.64/3210.201.131.64 – 10.201.131.6410.201.131.64
6610.201.131.65/3210.201.131.65 – 10.201.131.6510.201.131.65
6710.201.131.66/3210.201.131.66 – 10.201.131.6610.201.131.66
6810.201.131.67/3210.201.131.67 – 10.201.131.6710.201.131.67
6910.201.131.68/3210.201.131.68 – 10.201.131.6810.201.131.68
7010.201.131.69/3210.201.131.69 – 10.201.131.6910.201.131.69
7110.201.131.70/3210.201.131.70 – 10.201.131.7010.201.131.70
7210.201.131.71/3210.201.131.71 – 10.201.131.7110.201.131.71
7310.201.131.72/3210.201.131.72 – 10.201.131.7210.201.131.72
7410.201.131.73/3210.201.131.73 – 10.201.131.7310.201.131.73
7510.201.131.74/3210.201.131.74 – 10.201.131.7410.201.131.74
7610.201.131.75/3210.201.131.75 – 10.201.131.7510.201.131.75
7710.201.131.76/3210.201.131.76 – 10.201.131.7610.201.131.76
7810.201.131.77/3210.201.131.77 – 10.201.131.7710.201.131.77
7910.201.131.78/3210.201.131.78 – 10.201.131.7810.201.131.78
8010.201.131.79/3210.201.131.79 – 10.201.131.7910.201.131.79
8110.201.131.80/3210.201.131.80 – 10.201.131.8010.201.131.80
8210.201.131.81/3210.201.131.81 – 10.201.131.8110.201.131.81
8310.201.131.82/3210.201.131.82 – 10.201.131.8210.201.131.82
8410.201.131.83/3210.201.131.83 – 10.201.131.8310.201.131.83
8510.201.131.84/3210.201.131.84 – 10.201.131.8410.201.131.84
8610.201.131.85/3210.201.131.85 – 10.201.131.8510.201.131.85
8710.201.131.86/3210.201.131.86 – 10.201.131.8610.201.131.86
8810.201.131.87/3210.201.131.87 – 10.201.131.8710.201.131.87
8910.201.131.88/3210.201.131.88 – 10.201.131.8810.201.131.88
9010.201.131.89/3210.201.131.89 – 10.201.131.8910.201.131.89
9110.201.131.90/3210.201.131.90 – 10.201.131.9010.201.131.90
9210.201.131.91/3210.201.131.91 – 10.201.131.9110.201.131.91
9310.201.131.92/3210.201.131.92 – 10.201.131.9210.201.131.92
9410.201.131.93/3210.201.131.93 – 10.201.131.9310.201.131.93
9510.201.131.94/3210.201.131.94 – 10.201.131.9410.201.131.94
9610.201.131.95/3210.201.131.95 – 10.201.131.9510.201.131.95
9710.201.131.96/3210.201.131.96 – 10.201.131.9610.201.131.96
9810.201.131.97/3210.201.131.97 – 10.201.131.9710.201.131.97
9910.201.131.98/3210.201.131.98 – 10.201.131.9810.201.131.98
10010.201.131.99/3210.201.131.99 – 10.201.131.9910.201.131.99
10110.201.131.100/3210.201.131.100 – 10.201.131.10010.201.131.100
10210.201.131.101/3210.201.131.101 – 10.201.131.10110.201.131.101
10310.201.131.102/3210.201.131.102 – 10.201.131.10210.201.131.102
10410.201.131.103/3210.201.131.103 – 10.201.131.10310.201.131.103
10510.201.131.104/3210.201.131.104 – 10.201.131.10410.201.131.104
10610.201.131.105/3210.201.131.105 – 10.201.131.10510.201.131.105
10710.201.131.106/3210.201.131.106 – 10.201.131.10610.201.131.106
10810.201.131.107/3210.201.131.107 – 10.201.131.10710.201.131.107
10910.201.131.108/3210.201.131.108 – 10.201.131.10810.201.131.108
11010.201.131.109/3210.201.131.109 – 10.201.131.10910.201.131.109
11110.201.131.110/3210.201.131.110 – 10.201.131.11010.201.131.110
11210.201.131.111/3210.201.131.111 – 10.201.131.11110.201.131.111
11310.201.131.112/3210.201.131.112 – 10.201.131.11210.201.131.112
11410.201.131.113/3210.201.131.113 – 10.201.131.11310.201.131.113
11510.201.131.114/3210.201.131.114 – 10.201.131.11410.201.131.114
11610.201.131.115/3210.201.131.115 – 10.201.131.11510.201.131.115
11710.201.131.116/3210.201.131.116 – 10.201.131.11610.201.131.116
11810.201.131.117/3210.201.131.117 – 10.201.131.11710.201.131.117
11910.201.131.118/3210.201.131.118 – 10.201.131.11810.201.131.118
12010.201.131.119/3210.201.131.119 – 10.201.131.11910.201.131.119
12110.201.131.120/3210.201.131.120 – 10.201.131.12010.201.131.120
12210.201.131.121/3210.201.131.121 – 10.201.131.12110.201.131.121
12310.201.131.122/3210.201.131.122 – 10.201.131.12210.201.131.122
12410.201.131.123/3210.201.131.123 – 10.201.131.12310.201.131.123
12510.201.131.124/3210.201.131.124 – 10.201.131.12410.201.131.124
12610.201.131.125/3210.201.131.125 – 10.201.131.12510.201.131.125
12710.201.131.126/3210.201.131.126 – 10.201.131.12610.201.131.126
12810.201.131.127/3210.201.131.127 – 10.201.131.12710.201.131.127
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 →