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)10.7.63.0/25
network10.7.63.0/25
broadcast10.7.63.127
first host10.7.63.1
last host10.7.63.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.7.63.0/25
address00001010.00000111.00111111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000111.00111111.00000000
broadcast00001010.00000111.00111111.01111111
green = network part, grey = host part
hex0x0a073f00
decimal168247040
reverse dns0.63.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:3f00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.63.0/3210.7.63.0 – 10.7.63.010.7.63.0
210.7.63.1/3210.7.63.1 – 10.7.63.110.7.63.1
310.7.63.2/3210.7.63.2 – 10.7.63.210.7.63.2
410.7.63.3/3210.7.63.3 – 10.7.63.310.7.63.3
510.7.63.4/3210.7.63.4 – 10.7.63.410.7.63.4
610.7.63.5/3210.7.63.5 – 10.7.63.510.7.63.5
710.7.63.6/3210.7.63.6 – 10.7.63.610.7.63.6
810.7.63.7/3210.7.63.7 – 10.7.63.710.7.63.7
910.7.63.8/3210.7.63.8 – 10.7.63.810.7.63.8
1010.7.63.9/3210.7.63.9 – 10.7.63.910.7.63.9
1110.7.63.10/3210.7.63.10 – 10.7.63.1010.7.63.10
1210.7.63.11/3210.7.63.11 – 10.7.63.1110.7.63.11
1310.7.63.12/3210.7.63.12 – 10.7.63.1210.7.63.12
1410.7.63.13/3210.7.63.13 – 10.7.63.1310.7.63.13
1510.7.63.14/3210.7.63.14 – 10.7.63.1410.7.63.14
1610.7.63.15/3210.7.63.15 – 10.7.63.1510.7.63.15
1710.7.63.16/3210.7.63.16 – 10.7.63.1610.7.63.16
1810.7.63.17/3210.7.63.17 – 10.7.63.1710.7.63.17
1910.7.63.18/3210.7.63.18 – 10.7.63.1810.7.63.18
2010.7.63.19/3210.7.63.19 – 10.7.63.1910.7.63.19
2110.7.63.20/3210.7.63.20 – 10.7.63.2010.7.63.20
2210.7.63.21/3210.7.63.21 – 10.7.63.2110.7.63.21
2310.7.63.22/3210.7.63.22 – 10.7.63.2210.7.63.22
2410.7.63.23/3210.7.63.23 – 10.7.63.2310.7.63.23
2510.7.63.24/3210.7.63.24 – 10.7.63.2410.7.63.24
2610.7.63.25/3210.7.63.25 – 10.7.63.2510.7.63.25
2710.7.63.26/3210.7.63.26 – 10.7.63.2610.7.63.26
2810.7.63.27/3210.7.63.27 – 10.7.63.2710.7.63.27
2910.7.63.28/3210.7.63.28 – 10.7.63.2810.7.63.28
3010.7.63.29/3210.7.63.29 – 10.7.63.2910.7.63.29
3110.7.63.30/3210.7.63.30 – 10.7.63.3010.7.63.30
3210.7.63.31/3210.7.63.31 – 10.7.63.3110.7.63.31
3310.7.63.32/3210.7.63.32 – 10.7.63.3210.7.63.32
3410.7.63.33/3210.7.63.33 – 10.7.63.3310.7.63.33
3510.7.63.34/3210.7.63.34 – 10.7.63.3410.7.63.34
3610.7.63.35/3210.7.63.35 – 10.7.63.3510.7.63.35
3710.7.63.36/3210.7.63.36 – 10.7.63.3610.7.63.36
3810.7.63.37/3210.7.63.37 – 10.7.63.3710.7.63.37
3910.7.63.38/3210.7.63.38 – 10.7.63.3810.7.63.38
4010.7.63.39/3210.7.63.39 – 10.7.63.3910.7.63.39
4110.7.63.40/3210.7.63.40 – 10.7.63.4010.7.63.40
4210.7.63.41/3210.7.63.41 – 10.7.63.4110.7.63.41
4310.7.63.42/3210.7.63.42 – 10.7.63.4210.7.63.42
4410.7.63.43/3210.7.63.43 – 10.7.63.4310.7.63.43
4510.7.63.44/3210.7.63.44 – 10.7.63.4410.7.63.44
4610.7.63.45/3210.7.63.45 – 10.7.63.4510.7.63.45
4710.7.63.46/3210.7.63.46 – 10.7.63.4610.7.63.46
4810.7.63.47/3210.7.63.47 – 10.7.63.4710.7.63.47
4910.7.63.48/3210.7.63.48 – 10.7.63.4810.7.63.48
5010.7.63.49/3210.7.63.49 – 10.7.63.4910.7.63.49
5110.7.63.50/3210.7.63.50 – 10.7.63.5010.7.63.50
5210.7.63.51/3210.7.63.51 – 10.7.63.5110.7.63.51
5310.7.63.52/3210.7.63.52 – 10.7.63.5210.7.63.52
5410.7.63.53/3210.7.63.53 – 10.7.63.5310.7.63.53
5510.7.63.54/3210.7.63.54 – 10.7.63.5410.7.63.54
5610.7.63.55/3210.7.63.55 – 10.7.63.5510.7.63.55
5710.7.63.56/3210.7.63.56 – 10.7.63.5610.7.63.56
5810.7.63.57/3210.7.63.57 – 10.7.63.5710.7.63.57
5910.7.63.58/3210.7.63.58 – 10.7.63.5810.7.63.58
6010.7.63.59/3210.7.63.59 – 10.7.63.5910.7.63.59
6110.7.63.60/3210.7.63.60 – 10.7.63.6010.7.63.60
6210.7.63.61/3210.7.63.61 – 10.7.63.6110.7.63.61
6310.7.63.62/3210.7.63.62 – 10.7.63.6210.7.63.62
6410.7.63.63/3210.7.63.63 – 10.7.63.6310.7.63.63
6510.7.63.64/3210.7.63.64 – 10.7.63.6410.7.63.64
6610.7.63.65/3210.7.63.65 – 10.7.63.6510.7.63.65
6710.7.63.66/3210.7.63.66 – 10.7.63.6610.7.63.66
6810.7.63.67/3210.7.63.67 – 10.7.63.6710.7.63.67
6910.7.63.68/3210.7.63.68 – 10.7.63.6810.7.63.68
7010.7.63.69/3210.7.63.69 – 10.7.63.6910.7.63.69
7110.7.63.70/3210.7.63.70 – 10.7.63.7010.7.63.70
7210.7.63.71/3210.7.63.71 – 10.7.63.7110.7.63.71
7310.7.63.72/3210.7.63.72 – 10.7.63.7210.7.63.72
7410.7.63.73/3210.7.63.73 – 10.7.63.7310.7.63.73
7510.7.63.74/3210.7.63.74 – 10.7.63.7410.7.63.74
7610.7.63.75/3210.7.63.75 – 10.7.63.7510.7.63.75
7710.7.63.76/3210.7.63.76 – 10.7.63.7610.7.63.76
7810.7.63.77/3210.7.63.77 – 10.7.63.7710.7.63.77
7910.7.63.78/3210.7.63.78 – 10.7.63.7810.7.63.78
8010.7.63.79/3210.7.63.79 – 10.7.63.7910.7.63.79
8110.7.63.80/3210.7.63.80 – 10.7.63.8010.7.63.80
8210.7.63.81/3210.7.63.81 – 10.7.63.8110.7.63.81
8310.7.63.82/3210.7.63.82 – 10.7.63.8210.7.63.82
8410.7.63.83/3210.7.63.83 – 10.7.63.8310.7.63.83
8510.7.63.84/3210.7.63.84 – 10.7.63.8410.7.63.84
8610.7.63.85/3210.7.63.85 – 10.7.63.8510.7.63.85
8710.7.63.86/3210.7.63.86 – 10.7.63.8610.7.63.86
8810.7.63.87/3210.7.63.87 – 10.7.63.8710.7.63.87
8910.7.63.88/3210.7.63.88 – 10.7.63.8810.7.63.88
9010.7.63.89/3210.7.63.89 – 10.7.63.8910.7.63.89
9110.7.63.90/3210.7.63.90 – 10.7.63.9010.7.63.90
9210.7.63.91/3210.7.63.91 – 10.7.63.9110.7.63.91
9310.7.63.92/3210.7.63.92 – 10.7.63.9210.7.63.92
9410.7.63.93/3210.7.63.93 – 10.7.63.9310.7.63.93
9510.7.63.94/3210.7.63.94 – 10.7.63.9410.7.63.94
9610.7.63.95/3210.7.63.95 – 10.7.63.9510.7.63.95
9710.7.63.96/3210.7.63.96 – 10.7.63.9610.7.63.96
9810.7.63.97/3210.7.63.97 – 10.7.63.9710.7.63.97
9910.7.63.98/3210.7.63.98 – 10.7.63.9810.7.63.98
10010.7.63.99/3210.7.63.99 – 10.7.63.9910.7.63.99
10110.7.63.100/3210.7.63.100 – 10.7.63.10010.7.63.100
10210.7.63.101/3210.7.63.101 – 10.7.63.10110.7.63.101
10310.7.63.102/3210.7.63.102 – 10.7.63.10210.7.63.102
10410.7.63.103/3210.7.63.103 – 10.7.63.10310.7.63.103
10510.7.63.104/3210.7.63.104 – 10.7.63.10410.7.63.104
10610.7.63.105/3210.7.63.105 – 10.7.63.10510.7.63.105
10710.7.63.106/3210.7.63.106 – 10.7.63.10610.7.63.106
10810.7.63.107/3210.7.63.107 – 10.7.63.10710.7.63.107
10910.7.63.108/3210.7.63.108 – 10.7.63.10810.7.63.108
11010.7.63.109/3210.7.63.109 – 10.7.63.10910.7.63.109
11110.7.63.110/3210.7.63.110 – 10.7.63.11010.7.63.110
11210.7.63.111/3210.7.63.111 – 10.7.63.11110.7.63.111
11310.7.63.112/3210.7.63.112 – 10.7.63.11210.7.63.112
11410.7.63.113/3210.7.63.113 – 10.7.63.11310.7.63.113
11510.7.63.114/3210.7.63.114 – 10.7.63.11410.7.63.114
11610.7.63.115/3210.7.63.115 – 10.7.63.11510.7.63.115
11710.7.63.116/3210.7.63.116 – 10.7.63.11610.7.63.116
11810.7.63.117/3210.7.63.117 – 10.7.63.11710.7.63.117
11910.7.63.118/3210.7.63.118 – 10.7.63.11810.7.63.118
12010.7.63.119/3210.7.63.119 – 10.7.63.11910.7.63.119
12110.7.63.120/3210.7.63.120 – 10.7.63.12010.7.63.120
12210.7.63.121/3210.7.63.121 – 10.7.63.12110.7.63.121
12310.7.63.122/3210.7.63.122 – 10.7.63.12210.7.63.122
12410.7.63.123/3210.7.63.123 – 10.7.63.12310.7.63.123
12510.7.63.124/3210.7.63.124 – 10.7.63.12410.7.63.124
12610.7.63.125/3210.7.63.125 – 10.7.63.12510.7.63.125
12710.7.63.126/3210.7.63.126 – 10.7.63.12610.7.63.126
12810.7.63.127/3210.7.63.127 – 10.7.63.12710.7.63.127
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 →