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)10.2.27.0/25
network10.2.27.0/25
broadcast10.2.27.127
first host10.2.27.1
last host10.2.27.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.27.0/25
address00001010.00000010.00011011.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00011011.00000000
broadcast00001010.00000010.00011011.01111111
green = network part, grey = host part
hex0x0a021b00
decimal167910144
reverse dns0.27.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:1b00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.27.0/3210.2.27.0 – 10.2.27.010.2.27.0
210.2.27.1/3210.2.27.1 – 10.2.27.110.2.27.1
310.2.27.2/3210.2.27.2 – 10.2.27.210.2.27.2
410.2.27.3/3210.2.27.3 – 10.2.27.310.2.27.3
510.2.27.4/3210.2.27.4 – 10.2.27.410.2.27.4
610.2.27.5/3210.2.27.5 – 10.2.27.510.2.27.5
710.2.27.6/3210.2.27.6 – 10.2.27.610.2.27.6
810.2.27.7/3210.2.27.7 – 10.2.27.710.2.27.7
910.2.27.8/3210.2.27.8 – 10.2.27.810.2.27.8
1010.2.27.9/3210.2.27.9 – 10.2.27.910.2.27.9
1110.2.27.10/3210.2.27.10 – 10.2.27.1010.2.27.10
1210.2.27.11/3210.2.27.11 – 10.2.27.1110.2.27.11
1310.2.27.12/3210.2.27.12 – 10.2.27.1210.2.27.12
1410.2.27.13/3210.2.27.13 – 10.2.27.1310.2.27.13
1510.2.27.14/3210.2.27.14 – 10.2.27.1410.2.27.14
1610.2.27.15/3210.2.27.15 – 10.2.27.1510.2.27.15
1710.2.27.16/3210.2.27.16 – 10.2.27.1610.2.27.16
1810.2.27.17/3210.2.27.17 – 10.2.27.1710.2.27.17
1910.2.27.18/3210.2.27.18 – 10.2.27.1810.2.27.18
2010.2.27.19/3210.2.27.19 – 10.2.27.1910.2.27.19
2110.2.27.20/3210.2.27.20 – 10.2.27.2010.2.27.20
2210.2.27.21/3210.2.27.21 – 10.2.27.2110.2.27.21
2310.2.27.22/3210.2.27.22 – 10.2.27.2210.2.27.22
2410.2.27.23/3210.2.27.23 – 10.2.27.2310.2.27.23
2510.2.27.24/3210.2.27.24 – 10.2.27.2410.2.27.24
2610.2.27.25/3210.2.27.25 – 10.2.27.2510.2.27.25
2710.2.27.26/3210.2.27.26 – 10.2.27.2610.2.27.26
2810.2.27.27/3210.2.27.27 – 10.2.27.2710.2.27.27
2910.2.27.28/3210.2.27.28 – 10.2.27.2810.2.27.28
3010.2.27.29/3210.2.27.29 – 10.2.27.2910.2.27.29
3110.2.27.30/3210.2.27.30 – 10.2.27.3010.2.27.30
3210.2.27.31/3210.2.27.31 – 10.2.27.3110.2.27.31
3310.2.27.32/3210.2.27.32 – 10.2.27.3210.2.27.32
3410.2.27.33/3210.2.27.33 – 10.2.27.3310.2.27.33
3510.2.27.34/3210.2.27.34 – 10.2.27.3410.2.27.34
3610.2.27.35/3210.2.27.35 – 10.2.27.3510.2.27.35
3710.2.27.36/3210.2.27.36 – 10.2.27.3610.2.27.36
3810.2.27.37/3210.2.27.37 – 10.2.27.3710.2.27.37
3910.2.27.38/3210.2.27.38 – 10.2.27.3810.2.27.38
4010.2.27.39/3210.2.27.39 – 10.2.27.3910.2.27.39
4110.2.27.40/3210.2.27.40 – 10.2.27.4010.2.27.40
4210.2.27.41/3210.2.27.41 – 10.2.27.4110.2.27.41
4310.2.27.42/3210.2.27.42 – 10.2.27.4210.2.27.42
4410.2.27.43/3210.2.27.43 – 10.2.27.4310.2.27.43
4510.2.27.44/3210.2.27.44 – 10.2.27.4410.2.27.44
4610.2.27.45/3210.2.27.45 – 10.2.27.4510.2.27.45
4710.2.27.46/3210.2.27.46 – 10.2.27.4610.2.27.46
4810.2.27.47/3210.2.27.47 – 10.2.27.4710.2.27.47
4910.2.27.48/3210.2.27.48 – 10.2.27.4810.2.27.48
5010.2.27.49/3210.2.27.49 – 10.2.27.4910.2.27.49
5110.2.27.50/3210.2.27.50 – 10.2.27.5010.2.27.50
5210.2.27.51/3210.2.27.51 – 10.2.27.5110.2.27.51
5310.2.27.52/3210.2.27.52 – 10.2.27.5210.2.27.52
5410.2.27.53/3210.2.27.53 – 10.2.27.5310.2.27.53
5510.2.27.54/3210.2.27.54 – 10.2.27.5410.2.27.54
5610.2.27.55/3210.2.27.55 – 10.2.27.5510.2.27.55
5710.2.27.56/3210.2.27.56 – 10.2.27.5610.2.27.56
5810.2.27.57/3210.2.27.57 – 10.2.27.5710.2.27.57
5910.2.27.58/3210.2.27.58 – 10.2.27.5810.2.27.58
6010.2.27.59/3210.2.27.59 – 10.2.27.5910.2.27.59
6110.2.27.60/3210.2.27.60 – 10.2.27.6010.2.27.60
6210.2.27.61/3210.2.27.61 – 10.2.27.6110.2.27.61
6310.2.27.62/3210.2.27.62 – 10.2.27.6210.2.27.62
6410.2.27.63/3210.2.27.63 – 10.2.27.6310.2.27.63
6510.2.27.64/3210.2.27.64 – 10.2.27.6410.2.27.64
6610.2.27.65/3210.2.27.65 – 10.2.27.6510.2.27.65
6710.2.27.66/3210.2.27.66 – 10.2.27.6610.2.27.66
6810.2.27.67/3210.2.27.67 – 10.2.27.6710.2.27.67
6910.2.27.68/3210.2.27.68 – 10.2.27.6810.2.27.68
7010.2.27.69/3210.2.27.69 – 10.2.27.6910.2.27.69
7110.2.27.70/3210.2.27.70 – 10.2.27.7010.2.27.70
7210.2.27.71/3210.2.27.71 – 10.2.27.7110.2.27.71
7310.2.27.72/3210.2.27.72 – 10.2.27.7210.2.27.72
7410.2.27.73/3210.2.27.73 – 10.2.27.7310.2.27.73
7510.2.27.74/3210.2.27.74 – 10.2.27.7410.2.27.74
7610.2.27.75/3210.2.27.75 – 10.2.27.7510.2.27.75
7710.2.27.76/3210.2.27.76 – 10.2.27.7610.2.27.76
7810.2.27.77/3210.2.27.77 – 10.2.27.7710.2.27.77
7910.2.27.78/3210.2.27.78 – 10.2.27.7810.2.27.78
8010.2.27.79/3210.2.27.79 – 10.2.27.7910.2.27.79
8110.2.27.80/3210.2.27.80 – 10.2.27.8010.2.27.80
8210.2.27.81/3210.2.27.81 – 10.2.27.8110.2.27.81
8310.2.27.82/3210.2.27.82 – 10.2.27.8210.2.27.82
8410.2.27.83/3210.2.27.83 – 10.2.27.8310.2.27.83
8510.2.27.84/3210.2.27.84 – 10.2.27.8410.2.27.84
8610.2.27.85/3210.2.27.85 – 10.2.27.8510.2.27.85
8710.2.27.86/3210.2.27.86 – 10.2.27.8610.2.27.86
8810.2.27.87/3210.2.27.87 – 10.2.27.8710.2.27.87
8910.2.27.88/3210.2.27.88 – 10.2.27.8810.2.27.88
9010.2.27.89/3210.2.27.89 – 10.2.27.8910.2.27.89
9110.2.27.90/3210.2.27.90 – 10.2.27.9010.2.27.90
9210.2.27.91/3210.2.27.91 – 10.2.27.9110.2.27.91
9310.2.27.92/3210.2.27.92 – 10.2.27.9210.2.27.92
9410.2.27.93/3210.2.27.93 – 10.2.27.9310.2.27.93
9510.2.27.94/3210.2.27.94 – 10.2.27.9410.2.27.94
9610.2.27.95/3210.2.27.95 – 10.2.27.9510.2.27.95
9710.2.27.96/3210.2.27.96 – 10.2.27.9610.2.27.96
9810.2.27.97/3210.2.27.97 – 10.2.27.9710.2.27.97
9910.2.27.98/3210.2.27.98 – 10.2.27.9810.2.27.98
10010.2.27.99/3210.2.27.99 – 10.2.27.9910.2.27.99
10110.2.27.100/3210.2.27.100 – 10.2.27.10010.2.27.100
10210.2.27.101/3210.2.27.101 – 10.2.27.10110.2.27.101
10310.2.27.102/3210.2.27.102 – 10.2.27.10210.2.27.102
10410.2.27.103/3210.2.27.103 – 10.2.27.10310.2.27.103
10510.2.27.104/3210.2.27.104 – 10.2.27.10410.2.27.104
10610.2.27.105/3210.2.27.105 – 10.2.27.10510.2.27.105
10710.2.27.106/3210.2.27.106 – 10.2.27.10610.2.27.106
10810.2.27.107/3210.2.27.107 – 10.2.27.10710.2.27.107
10910.2.27.108/3210.2.27.108 – 10.2.27.10810.2.27.108
11010.2.27.109/3210.2.27.109 – 10.2.27.10910.2.27.109
11110.2.27.110/3210.2.27.110 – 10.2.27.11010.2.27.110
11210.2.27.111/3210.2.27.111 – 10.2.27.11110.2.27.111
11310.2.27.112/3210.2.27.112 – 10.2.27.11210.2.27.112
11410.2.27.113/3210.2.27.113 – 10.2.27.11310.2.27.113
11510.2.27.114/3210.2.27.114 – 10.2.27.11410.2.27.114
11610.2.27.115/3210.2.27.115 – 10.2.27.11510.2.27.115
11710.2.27.116/3210.2.27.116 – 10.2.27.11610.2.27.116
11810.2.27.117/3210.2.27.117 – 10.2.27.11710.2.27.117
11910.2.27.118/3210.2.27.118 – 10.2.27.11810.2.27.118
12010.2.27.119/3210.2.27.119 – 10.2.27.11910.2.27.119
12110.2.27.120/3210.2.27.120 – 10.2.27.12010.2.27.120
12210.2.27.121/3210.2.27.121 – 10.2.27.12110.2.27.121
12310.2.27.122/3210.2.27.122 – 10.2.27.12210.2.27.122
12410.2.27.123/3210.2.27.123 – 10.2.27.12310.2.27.123
12510.2.27.124/3210.2.27.124 – 10.2.27.12410.2.27.124
12610.2.27.125/3210.2.27.125 – 10.2.27.12510.2.27.125
12710.2.27.126/3210.2.27.126 – 10.2.27.12610.2.27.126
12810.2.27.127/3210.2.27.127 – 10.2.27.12710.2.27.127
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 →