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)10.6.237.0/25
network10.6.237.0/25
broadcast10.6.237.127
first host10.6.237.1
last host10.6.237.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.6.237.0/25
address00001010.00000110.11101101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000110.11101101.00000000
broadcast00001010.00000110.11101101.01111111
green = network part, grey = host part
hex0x0a06ed00
decimal168226048
reverse dns0.237.6.10.in-addr.arpa
ipv4-mapped::ffff:a06:ed00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.6.237.0/3210.6.237.0 – 10.6.237.010.6.237.0
210.6.237.1/3210.6.237.1 – 10.6.237.110.6.237.1
310.6.237.2/3210.6.237.2 – 10.6.237.210.6.237.2
410.6.237.3/3210.6.237.3 – 10.6.237.310.6.237.3
510.6.237.4/3210.6.237.4 – 10.6.237.410.6.237.4
610.6.237.5/3210.6.237.5 – 10.6.237.510.6.237.5
710.6.237.6/3210.6.237.6 – 10.6.237.610.6.237.6
810.6.237.7/3210.6.237.7 – 10.6.237.710.6.237.7
910.6.237.8/3210.6.237.8 – 10.6.237.810.6.237.8
1010.6.237.9/3210.6.237.9 – 10.6.237.910.6.237.9
1110.6.237.10/3210.6.237.10 – 10.6.237.1010.6.237.10
1210.6.237.11/3210.6.237.11 – 10.6.237.1110.6.237.11
1310.6.237.12/3210.6.237.12 – 10.6.237.1210.6.237.12
1410.6.237.13/3210.6.237.13 – 10.6.237.1310.6.237.13
1510.6.237.14/3210.6.237.14 – 10.6.237.1410.6.237.14
1610.6.237.15/3210.6.237.15 – 10.6.237.1510.6.237.15
1710.6.237.16/3210.6.237.16 – 10.6.237.1610.6.237.16
1810.6.237.17/3210.6.237.17 – 10.6.237.1710.6.237.17
1910.6.237.18/3210.6.237.18 – 10.6.237.1810.6.237.18
2010.6.237.19/3210.6.237.19 – 10.6.237.1910.6.237.19
2110.6.237.20/3210.6.237.20 – 10.6.237.2010.6.237.20
2210.6.237.21/3210.6.237.21 – 10.6.237.2110.6.237.21
2310.6.237.22/3210.6.237.22 – 10.6.237.2210.6.237.22
2410.6.237.23/3210.6.237.23 – 10.6.237.2310.6.237.23
2510.6.237.24/3210.6.237.24 – 10.6.237.2410.6.237.24
2610.6.237.25/3210.6.237.25 – 10.6.237.2510.6.237.25
2710.6.237.26/3210.6.237.26 – 10.6.237.2610.6.237.26
2810.6.237.27/3210.6.237.27 – 10.6.237.2710.6.237.27
2910.6.237.28/3210.6.237.28 – 10.6.237.2810.6.237.28
3010.6.237.29/3210.6.237.29 – 10.6.237.2910.6.237.29
3110.6.237.30/3210.6.237.30 – 10.6.237.3010.6.237.30
3210.6.237.31/3210.6.237.31 – 10.6.237.3110.6.237.31
3310.6.237.32/3210.6.237.32 – 10.6.237.3210.6.237.32
3410.6.237.33/3210.6.237.33 – 10.6.237.3310.6.237.33
3510.6.237.34/3210.6.237.34 – 10.6.237.3410.6.237.34
3610.6.237.35/3210.6.237.35 – 10.6.237.3510.6.237.35
3710.6.237.36/3210.6.237.36 – 10.6.237.3610.6.237.36
3810.6.237.37/3210.6.237.37 – 10.6.237.3710.6.237.37
3910.6.237.38/3210.6.237.38 – 10.6.237.3810.6.237.38
4010.6.237.39/3210.6.237.39 – 10.6.237.3910.6.237.39
4110.6.237.40/3210.6.237.40 – 10.6.237.4010.6.237.40
4210.6.237.41/3210.6.237.41 – 10.6.237.4110.6.237.41
4310.6.237.42/3210.6.237.42 – 10.6.237.4210.6.237.42
4410.6.237.43/3210.6.237.43 – 10.6.237.4310.6.237.43
4510.6.237.44/3210.6.237.44 – 10.6.237.4410.6.237.44
4610.6.237.45/3210.6.237.45 – 10.6.237.4510.6.237.45
4710.6.237.46/3210.6.237.46 – 10.6.237.4610.6.237.46
4810.6.237.47/3210.6.237.47 – 10.6.237.4710.6.237.47
4910.6.237.48/3210.6.237.48 – 10.6.237.4810.6.237.48
5010.6.237.49/3210.6.237.49 – 10.6.237.4910.6.237.49
5110.6.237.50/3210.6.237.50 – 10.6.237.5010.6.237.50
5210.6.237.51/3210.6.237.51 – 10.6.237.5110.6.237.51
5310.6.237.52/3210.6.237.52 – 10.6.237.5210.6.237.52
5410.6.237.53/3210.6.237.53 – 10.6.237.5310.6.237.53
5510.6.237.54/3210.6.237.54 – 10.6.237.5410.6.237.54
5610.6.237.55/3210.6.237.55 – 10.6.237.5510.6.237.55
5710.6.237.56/3210.6.237.56 – 10.6.237.5610.6.237.56
5810.6.237.57/3210.6.237.57 – 10.6.237.5710.6.237.57
5910.6.237.58/3210.6.237.58 – 10.6.237.5810.6.237.58
6010.6.237.59/3210.6.237.59 – 10.6.237.5910.6.237.59
6110.6.237.60/3210.6.237.60 – 10.6.237.6010.6.237.60
6210.6.237.61/3210.6.237.61 – 10.6.237.6110.6.237.61
6310.6.237.62/3210.6.237.62 – 10.6.237.6210.6.237.62
6410.6.237.63/3210.6.237.63 – 10.6.237.6310.6.237.63
6510.6.237.64/3210.6.237.64 – 10.6.237.6410.6.237.64
6610.6.237.65/3210.6.237.65 – 10.6.237.6510.6.237.65
6710.6.237.66/3210.6.237.66 – 10.6.237.6610.6.237.66
6810.6.237.67/3210.6.237.67 – 10.6.237.6710.6.237.67
6910.6.237.68/3210.6.237.68 – 10.6.237.6810.6.237.68
7010.6.237.69/3210.6.237.69 – 10.6.237.6910.6.237.69
7110.6.237.70/3210.6.237.70 – 10.6.237.7010.6.237.70
7210.6.237.71/3210.6.237.71 – 10.6.237.7110.6.237.71
7310.6.237.72/3210.6.237.72 – 10.6.237.7210.6.237.72
7410.6.237.73/3210.6.237.73 – 10.6.237.7310.6.237.73
7510.6.237.74/3210.6.237.74 – 10.6.237.7410.6.237.74
7610.6.237.75/3210.6.237.75 – 10.6.237.7510.6.237.75
7710.6.237.76/3210.6.237.76 – 10.6.237.7610.6.237.76
7810.6.237.77/3210.6.237.77 – 10.6.237.7710.6.237.77
7910.6.237.78/3210.6.237.78 – 10.6.237.7810.6.237.78
8010.6.237.79/3210.6.237.79 – 10.6.237.7910.6.237.79
8110.6.237.80/3210.6.237.80 – 10.6.237.8010.6.237.80
8210.6.237.81/3210.6.237.81 – 10.6.237.8110.6.237.81
8310.6.237.82/3210.6.237.82 – 10.6.237.8210.6.237.82
8410.6.237.83/3210.6.237.83 – 10.6.237.8310.6.237.83
8510.6.237.84/3210.6.237.84 – 10.6.237.8410.6.237.84
8610.6.237.85/3210.6.237.85 – 10.6.237.8510.6.237.85
8710.6.237.86/3210.6.237.86 – 10.6.237.8610.6.237.86
8810.6.237.87/3210.6.237.87 – 10.6.237.8710.6.237.87
8910.6.237.88/3210.6.237.88 – 10.6.237.8810.6.237.88
9010.6.237.89/3210.6.237.89 – 10.6.237.8910.6.237.89
9110.6.237.90/3210.6.237.90 – 10.6.237.9010.6.237.90
9210.6.237.91/3210.6.237.91 – 10.6.237.9110.6.237.91
9310.6.237.92/3210.6.237.92 – 10.6.237.9210.6.237.92
9410.6.237.93/3210.6.237.93 – 10.6.237.9310.6.237.93
9510.6.237.94/3210.6.237.94 – 10.6.237.9410.6.237.94
9610.6.237.95/3210.6.237.95 – 10.6.237.9510.6.237.95
9710.6.237.96/3210.6.237.96 – 10.6.237.9610.6.237.96
9810.6.237.97/3210.6.237.97 – 10.6.237.9710.6.237.97
9910.6.237.98/3210.6.237.98 – 10.6.237.9810.6.237.98
10010.6.237.99/3210.6.237.99 – 10.6.237.9910.6.237.99
10110.6.237.100/3210.6.237.100 – 10.6.237.10010.6.237.100
10210.6.237.101/3210.6.237.101 – 10.6.237.10110.6.237.101
10310.6.237.102/3210.6.237.102 – 10.6.237.10210.6.237.102
10410.6.237.103/3210.6.237.103 – 10.6.237.10310.6.237.103
10510.6.237.104/3210.6.237.104 – 10.6.237.10410.6.237.104
10610.6.237.105/3210.6.237.105 – 10.6.237.10510.6.237.105
10710.6.237.106/3210.6.237.106 – 10.6.237.10610.6.237.106
10810.6.237.107/3210.6.237.107 – 10.6.237.10710.6.237.107
10910.6.237.108/3210.6.237.108 – 10.6.237.10810.6.237.108
11010.6.237.109/3210.6.237.109 – 10.6.237.10910.6.237.109
11110.6.237.110/3210.6.237.110 – 10.6.237.11010.6.237.110
11210.6.237.111/3210.6.237.111 – 10.6.237.11110.6.237.111
11310.6.237.112/3210.6.237.112 – 10.6.237.11210.6.237.112
11410.6.237.113/3210.6.237.113 – 10.6.237.11310.6.237.113
11510.6.237.114/3210.6.237.114 – 10.6.237.11410.6.237.114
11610.6.237.115/3210.6.237.115 – 10.6.237.11510.6.237.115
11710.6.237.116/3210.6.237.116 – 10.6.237.11610.6.237.116
11810.6.237.117/3210.6.237.117 – 10.6.237.11710.6.237.117
11910.6.237.118/3210.6.237.118 – 10.6.237.11810.6.237.118
12010.6.237.119/3210.6.237.119 – 10.6.237.11910.6.237.119
12110.6.237.120/3210.6.237.120 – 10.6.237.12010.6.237.120
12210.6.237.121/3210.6.237.121 – 10.6.237.12110.6.237.121
12310.6.237.122/3210.6.237.122 – 10.6.237.12210.6.237.122
12410.6.237.123/3210.6.237.123 – 10.6.237.12310.6.237.123
12510.6.237.124/3210.6.237.124 – 10.6.237.12410.6.237.124
12610.6.237.125/3210.6.237.125 – 10.6.237.12510.6.237.125
12710.6.237.126/3210.6.237.126 – 10.6.237.12610.6.237.126
12810.6.237.127/3210.6.237.127 – 10.6.237.12710.6.237.127
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 →