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)10.2.50.0/25
network10.2.50.0/25
broadcast10.2.50.127
first host10.2.50.1
last host10.2.50.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.50.0/25
address00001010.00000010.00110010.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00110010.00000000
broadcast00001010.00000010.00110010.01111111
green = network part, grey = host part
hex0x0a023200
decimal167916032
reverse dns0.50.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:3200

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.50.0/3210.2.50.0 – 10.2.50.010.2.50.0
210.2.50.1/3210.2.50.1 – 10.2.50.110.2.50.1
310.2.50.2/3210.2.50.2 – 10.2.50.210.2.50.2
410.2.50.3/3210.2.50.3 – 10.2.50.310.2.50.3
510.2.50.4/3210.2.50.4 – 10.2.50.410.2.50.4
610.2.50.5/3210.2.50.5 – 10.2.50.510.2.50.5
710.2.50.6/3210.2.50.6 – 10.2.50.610.2.50.6
810.2.50.7/3210.2.50.7 – 10.2.50.710.2.50.7
910.2.50.8/3210.2.50.8 – 10.2.50.810.2.50.8
1010.2.50.9/3210.2.50.9 – 10.2.50.910.2.50.9
1110.2.50.10/3210.2.50.10 – 10.2.50.1010.2.50.10
1210.2.50.11/3210.2.50.11 – 10.2.50.1110.2.50.11
1310.2.50.12/3210.2.50.12 – 10.2.50.1210.2.50.12
1410.2.50.13/3210.2.50.13 – 10.2.50.1310.2.50.13
1510.2.50.14/3210.2.50.14 – 10.2.50.1410.2.50.14
1610.2.50.15/3210.2.50.15 – 10.2.50.1510.2.50.15
1710.2.50.16/3210.2.50.16 – 10.2.50.1610.2.50.16
1810.2.50.17/3210.2.50.17 – 10.2.50.1710.2.50.17
1910.2.50.18/3210.2.50.18 – 10.2.50.1810.2.50.18
2010.2.50.19/3210.2.50.19 – 10.2.50.1910.2.50.19
2110.2.50.20/3210.2.50.20 – 10.2.50.2010.2.50.20
2210.2.50.21/3210.2.50.21 – 10.2.50.2110.2.50.21
2310.2.50.22/3210.2.50.22 – 10.2.50.2210.2.50.22
2410.2.50.23/3210.2.50.23 – 10.2.50.2310.2.50.23
2510.2.50.24/3210.2.50.24 – 10.2.50.2410.2.50.24
2610.2.50.25/3210.2.50.25 – 10.2.50.2510.2.50.25
2710.2.50.26/3210.2.50.26 – 10.2.50.2610.2.50.26
2810.2.50.27/3210.2.50.27 – 10.2.50.2710.2.50.27
2910.2.50.28/3210.2.50.28 – 10.2.50.2810.2.50.28
3010.2.50.29/3210.2.50.29 – 10.2.50.2910.2.50.29
3110.2.50.30/3210.2.50.30 – 10.2.50.3010.2.50.30
3210.2.50.31/3210.2.50.31 – 10.2.50.3110.2.50.31
3310.2.50.32/3210.2.50.32 – 10.2.50.3210.2.50.32
3410.2.50.33/3210.2.50.33 – 10.2.50.3310.2.50.33
3510.2.50.34/3210.2.50.34 – 10.2.50.3410.2.50.34
3610.2.50.35/3210.2.50.35 – 10.2.50.3510.2.50.35
3710.2.50.36/3210.2.50.36 – 10.2.50.3610.2.50.36
3810.2.50.37/3210.2.50.37 – 10.2.50.3710.2.50.37
3910.2.50.38/3210.2.50.38 – 10.2.50.3810.2.50.38
4010.2.50.39/3210.2.50.39 – 10.2.50.3910.2.50.39
4110.2.50.40/3210.2.50.40 – 10.2.50.4010.2.50.40
4210.2.50.41/3210.2.50.41 – 10.2.50.4110.2.50.41
4310.2.50.42/3210.2.50.42 – 10.2.50.4210.2.50.42
4410.2.50.43/3210.2.50.43 – 10.2.50.4310.2.50.43
4510.2.50.44/3210.2.50.44 – 10.2.50.4410.2.50.44
4610.2.50.45/3210.2.50.45 – 10.2.50.4510.2.50.45
4710.2.50.46/3210.2.50.46 – 10.2.50.4610.2.50.46
4810.2.50.47/3210.2.50.47 – 10.2.50.4710.2.50.47
4910.2.50.48/3210.2.50.48 – 10.2.50.4810.2.50.48
5010.2.50.49/3210.2.50.49 – 10.2.50.4910.2.50.49
5110.2.50.50/3210.2.50.50 – 10.2.50.5010.2.50.50
5210.2.50.51/3210.2.50.51 – 10.2.50.5110.2.50.51
5310.2.50.52/3210.2.50.52 – 10.2.50.5210.2.50.52
5410.2.50.53/3210.2.50.53 – 10.2.50.5310.2.50.53
5510.2.50.54/3210.2.50.54 – 10.2.50.5410.2.50.54
5610.2.50.55/3210.2.50.55 – 10.2.50.5510.2.50.55
5710.2.50.56/3210.2.50.56 – 10.2.50.5610.2.50.56
5810.2.50.57/3210.2.50.57 – 10.2.50.5710.2.50.57
5910.2.50.58/3210.2.50.58 – 10.2.50.5810.2.50.58
6010.2.50.59/3210.2.50.59 – 10.2.50.5910.2.50.59
6110.2.50.60/3210.2.50.60 – 10.2.50.6010.2.50.60
6210.2.50.61/3210.2.50.61 – 10.2.50.6110.2.50.61
6310.2.50.62/3210.2.50.62 – 10.2.50.6210.2.50.62
6410.2.50.63/3210.2.50.63 – 10.2.50.6310.2.50.63
6510.2.50.64/3210.2.50.64 – 10.2.50.6410.2.50.64
6610.2.50.65/3210.2.50.65 – 10.2.50.6510.2.50.65
6710.2.50.66/3210.2.50.66 – 10.2.50.6610.2.50.66
6810.2.50.67/3210.2.50.67 – 10.2.50.6710.2.50.67
6910.2.50.68/3210.2.50.68 – 10.2.50.6810.2.50.68
7010.2.50.69/3210.2.50.69 – 10.2.50.6910.2.50.69
7110.2.50.70/3210.2.50.70 – 10.2.50.7010.2.50.70
7210.2.50.71/3210.2.50.71 – 10.2.50.7110.2.50.71
7310.2.50.72/3210.2.50.72 – 10.2.50.7210.2.50.72
7410.2.50.73/3210.2.50.73 – 10.2.50.7310.2.50.73
7510.2.50.74/3210.2.50.74 – 10.2.50.7410.2.50.74
7610.2.50.75/3210.2.50.75 – 10.2.50.7510.2.50.75
7710.2.50.76/3210.2.50.76 – 10.2.50.7610.2.50.76
7810.2.50.77/3210.2.50.77 – 10.2.50.7710.2.50.77
7910.2.50.78/3210.2.50.78 – 10.2.50.7810.2.50.78
8010.2.50.79/3210.2.50.79 – 10.2.50.7910.2.50.79
8110.2.50.80/3210.2.50.80 – 10.2.50.8010.2.50.80
8210.2.50.81/3210.2.50.81 – 10.2.50.8110.2.50.81
8310.2.50.82/3210.2.50.82 – 10.2.50.8210.2.50.82
8410.2.50.83/3210.2.50.83 – 10.2.50.8310.2.50.83
8510.2.50.84/3210.2.50.84 – 10.2.50.8410.2.50.84
8610.2.50.85/3210.2.50.85 – 10.2.50.8510.2.50.85
8710.2.50.86/3210.2.50.86 – 10.2.50.8610.2.50.86
8810.2.50.87/3210.2.50.87 – 10.2.50.8710.2.50.87
8910.2.50.88/3210.2.50.88 – 10.2.50.8810.2.50.88
9010.2.50.89/3210.2.50.89 – 10.2.50.8910.2.50.89
9110.2.50.90/3210.2.50.90 – 10.2.50.9010.2.50.90
9210.2.50.91/3210.2.50.91 – 10.2.50.9110.2.50.91
9310.2.50.92/3210.2.50.92 – 10.2.50.9210.2.50.92
9410.2.50.93/3210.2.50.93 – 10.2.50.9310.2.50.93
9510.2.50.94/3210.2.50.94 – 10.2.50.9410.2.50.94
9610.2.50.95/3210.2.50.95 – 10.2.50.9510.2.50.95
9710.2.50.96/3210.2.50.96 – 10.2.50.9610.2.50.96
9810.2.50.97/3210.2.50.97 – 10.2.50.9710.2.50.97
9910.2.50.98/3210.2.50.98 – 10.2.50.9810.2.50.98
10010.2.50.99/3210.2.50.99 – 10.2.50.9910.2.50.99
10110.2.50.100/3210.2.50.100 – 10.2.50.10010.2.50.100
10210.2.50.101/3210.2.50.101 – 10.2.50.10110.2.50.101
10310.2.50.102/3210.2.50.102 – 10.2.50.10210.2.50.102
10410.2.50.103/3210.2.50.103 – 10.2.50.10310.2.50.103
10510.2.50.104/3210.2.50.104 – 10.2.50.10410.2.50.104
10610.2.50.105/3210.2.50.105 – 10.2.50.10510.2.50.105
10710.2.50.106/3210.2.50.106 – 10.2.50.10610.2.50.106
10810.2.50.107/3210.2.50.107 – 10.2.50.10710.2.50.107
10910.2.50.108/3210.2.50.108 – 10.2.50.10810.2.50.108
11010.2.50.109/3210.2.50.109 – 10.2.50.10910.2.50.109
11110.2.50.110/3210.2.50.110 – 10.2.50.11010.2.50.110
11210.2.50.111/3210.2.50.111 – 10.2.50.11110.2.50.111
11310.2.50.112/3210.2.50.112 – 10.2.50.11210.2.50.112
11410.2.50.113/3210.2.50.113 – 10.2.50.11310.2.50.113
11510.2.50.114/3210.2.50.114 – 10.2.50.11410.2.50.114
11610.2.50.115/3210.2.50.115 – 10.2.50.11510.2.50.115
11710.2.50.116/3210.2.50.116 – 10.2.50.11610.2.50.116
11810.2.50.117/3210.2.50.117 – 10.2.50.11710.2.50.117
11910.2.50.118/3210.2.50.118 – 10.2.50.11810.2.50.118
12010.2.50.119/3210.2.50.119 – 10.2.50.11910.2.50.119
12110.2.50.120/3210.2.50.120 – 10.2.50.12010.2.50.120
12210.2.50.121/3210.2.50.121 – 10.2.50.12110.2.50.121
12310.2.50.122/3210.2.50.122 – 10.2.50.12210.2.50.122
12410.2.50.123/3210.2.50.123 – 10.2.50.12310.2.50.123
12510.2.50.124/3210.2.50.124 – 10.2.50.12410.2.50.124
12610.2.50.125/3210.2.50.125 – 10.2.50.12510.2.50.125
12710.2.50.126/3210.2.50.126 – 10.2.50.12610.2.50.126
12810.2.50.127/3210.2.50.127 – 10.2.50.12710.2.50.127
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 →