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)10.2.185.0/25
network10.2.185.0/25
broadcast10.2.185.127
first host10.2.185.1
last host10.2.185.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.185.0/25
address00001010.00000010.10111001.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.10111001.00000000
broadcast00001010.00000010.10111001.01111111
green = network part, grey = host part
hex0x0a02b900
decimal167950592
reverse dns0.185.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:b900

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.185.0/3210.2.185.0 – 10.2.185.010.2.185.0
210.2.185.1/3210.2.185.1 – 10.2.185.110.2.185.1
310.2.185.2/3210.2.185.2 – 10.2.185.210.2.185.2
410.2.185.3/3210.2.185.3 – 10.2.185.310.2.185.3
510.2.185.4/3210.2.185.4 – 10.2.185.410.2.185.4
610.2.185.5/3210.2.185.5 – 10.2.185.510.2.185.5
710.2.185.6/3210.2.185.6 – 10.2.185.610.2.185.6
810.2.185.7/3210.2.185.7 – 10.2.185.710.2.185.7
910.2.185.8/3210.2.185.8 – 10.2.185.810.2.185.8
1010.2.185.9/3210.2.185.9 – 10.2.185.910.2.185.9
1110.2.185.10/3210.2.185.10 – 10.2.185.1010.2.185.10
1210.2.185.11/3210.2.185.11 – 10.2.185.1110.2.185.11
1310.2.185.12/3210.2.185.12 – 10.2.185.1210.2.185.12
1410.2.185.13/3210.2.185.13 – 10.2.185.1310.2.185.13
1510.2.185.14/3210.2.185.14 – 10.2.185.1410.2.185.14
1610.2.185.15/3210.2.185.15 – 10.2.185.1510.2.185.15
1710.2.185.16/3210.2.185.16 – 10.2.185.1610.2.185.16
1810.2.185.17/3210.2.185.17 – 10.2.185.1710.2.185.17
1910.2.185.18/3210.2.185.18 – 10.2.185.1810.2.185.18
2010.2.185.19/3210.2.185.19 – 10.2.185.1910.2.185.19
2110.2.185.20/3210.2.185.20 – 10.2.185.2010.2.185.20
2210.2.185.21/3210.2.185.21 – 10.2.185.2110.2.185.21
2310.2.185.22/3210.2.185.22 – 10.2.185.2210.2.185.22
2410.2.185.23/3210.2.185.23 – 10.2.185.2310.2.185.23
2510.2.185.24/3210.2.185.24 – 10.2.185.2410.2.185.24
2610.2.185.25/3210.2.185.25 – 10.2.185.2510.2.185.25
2710.2.185.26/3210.2.185.26 – 10.2.185.2610.2.185.26
2810.2.185.27/3210.2.185.27 – 10.2.185.2710.2.185.27
2910.2.185.28/3210.2.185.28 – 10.2.185.2810.2.185.28
3010.2.185.29/3210.2.185.29 – 10.2.185.2910.2.185.29
3110.2.185.30/3210.2.185.30 – 10.2.185.3010.2.185.30
3210.2.185.31/3210.2.185.31 – 10.2.185.3110.2.185.31
3310.2.185.32/3210.2.185.32 – 10.2.185.3210.2.185.32
3410.2.185.33/3210.2.185.33 – 10.2.185.3310.2.185.33
3510.2.185.34/3210.2.185.34 – 10.2.185.3410.2.185.34
3610.2.185.35/3210.2.185.35 – 10.2.185.3510.2.185.35
3710.2.185.36/3210.2.185.36 – 10.2.185.3610.2.185.36
3810.2.185.37/3210.2.185.37 – 10.2.185.3710.2.185.37
3910.2.185.38/3210.2.185.38 – 10.2.185.3810.2.185.38
4010.2.185.39/3210.2.185.39 – 10.2.185.3910.2.185.39
4110.2.185.40/3210.2.185.40 – 10.2.185.4010.2.185.40
4210.2.185.41/3210.2.185.41 – 10.2.185.4110.2.185.41
4310.2.185.42/3210.2.185.42 – 10.2.185.4210.2.185.42
4410.2.185.43/3210.2.185.43 – 10.2.185.4310.2.185.43
4510.2.185.44/3210.2.185.44 – 10.2.185.4410.2.185.44
4610.2.185.45/3210.2.185.45 – 10.2.185.4510.2.185.45
4710.2.185.46/3210.2.185.46 – 10.2.185.4610.2.185.46
4810.2.185.47/3210.2.185.47 – 10.2.185.4710.2.185.47
4910.2.185.48/3210.2.185.48 – 10.2.185.4810.2.185.48
5010.2.185.49/3210.2.185.49 – 10.2.185.4910.2.185.49
5110.2.185.50/3210.2.185.50 – 10.2.185.5010.2.185.50
5210.2.185.51/3210.2.185.51 – 10.2.185.5110.2.185.51
5310.2.185.52/3210.2.185.52 – 10.2.185.5210.2.185.52
5410.2.185.53/3210.2.185.53 – 10.2.185.5310.2.185.53
5510.2.185.54/3210.2.185.54 – 10.2.185.5410.2.185.54
5610.2.185.55/3210.2.185.55 – 10.2.185.5510.2.185.55
5710.2.185.56/3210.2.185.56 – 10.2.185.5610.2.185.56
5810.2.185.57/3210.2.185.57 – 10.2.185.5710.2.185.57
5910.2.185.58/3210.2.185.58 – 10.2.185.5810.2.185.58
6010.2.185.59/3210.2.185.59 – 10.2.185.5910.2.185.59
6110.2.185.60/3210.2.185.60 – 10.2.185.6010.2.185.60
6210.2.185.61/3210.2.185.61 – 10.2.185.6110.2.185.61
6310.2.185.62/3210.2.185.62 – 10.2.185.6210.2.185.62
6410.2.185.63/3210.2.185.63 – 10.2.185.6310.2.185.63
6510.2.185.64/3210.2.185.64 – 10.2.185.6410.2.185.64
6610.2.185.65/3210.2.185.65 – 10.2.185.6510.2.185.65
6710.2.185.66/3210.2.185.66 – 10.2.185.6610.2.185.66
6810.2.185.67/3210.2.185.67 – 10.2.185.6710.2.185.67
6910.2.185.68/3210.2.185.68 – 10.2.185.6810.2.185.68
7010.2.185.69/3210.2.185.69 – 10.2.185.6910.2.185.69
7110.2.185.70/3210.2.185.70 – 10.2.185.7010.2.185.70
7210.2.185.71/3210.2.185.71 – 10.2.185.7110.2.185.71
7310.2.185.72/3210.2.185.72 – 10.2.185.7210.2.185.72
7410.2.185.73/3210.2.185.73 – 10.2.185.7310.2.185.73
7510.2.185.74/3210.2.185.74 – 10.2.185.7410.2.185.74
7610.2.185.75/3210.2.185.75 – 10.2.185.7510.2.185.75
7710.2.185.76/3210.2.185.76 – 10.2.185.7610.2.185.76
7810.2.185.77/3210.2.185.77 – 10.2.185.7710.2.185.77
7910.2.185.78/3210.2.185.78 – 10.2.185.7810.2.185.78
8010.2.185.79/3210.2.185.79 – 10.2.185.7910.2.185.79
8110.2.185.80/3210.2.185.80 – 10.2.185.8010.2.185.80
8210.2.185.81/3210.2.185.81 – 10.2.185.8110.2.185.81
8310.2.185.82/3210.2.185.82 – 10.2.185.8210.2.185.82
8410.2.185.83/3210.2.185.83 – 10.2.185.8310.2.185.83
8510.2.185.84/3210.2.185.84 – 10.2.185.8410.2.185.84
8610.2.185.85/3210.2.185.85 – 10.2.185.8510.2.185.85
8710.2.185.86/3210.2.185.86 – 10.2.185.8610.2.185.86
8810.2.185.87/3210.2.185.87 – 10.2.185.8710.2.185.87
8910.2.185.88/3210.2.185.88 – 10.2.185.8810.2.185.88
9010.2.185.89/3210.2.185.89 – 10.2.185.8910.2.185.89
9110.2.185.90/3210.2.185.90 – 10.2.185.9010.2.185.90
9210.2.185.91/3210.2.185.91 – 10.2.185.9110.2.185.91
9310.2.185.92/3210.2.185.92 – 10.2.185.9210.2.185.92
9410.2.185.93/3210.2.185.93 – 10.2.185.9310.2.185.93
9510.2.185.94/3210.2.185.94 – 10.2.185.9410.2.185.94
9610.2.185.95/3210.2.185.95 – 10.2.185.9510.2.185.95
9710.2.185.96/3210.2.185.96 – 10.2.185.9610.2.185.96
9810.2.185.97/3210.2.185.97 – 10.2.185.9710.2.185.97
9910.2.185.98/3210.2.185.98 – 10.2.185.9810.2.185.98
10010.2.185.99/3210.2.185.99 – 10.2.185.9910.2.185.99
10110.2.185.100/3210.2.185.100 – 10.2.185.10010.2.185.100
10210.2.185.101/3210.2.185.101 – 10.2.185.10110.2.185.101
10310.2.185.102/3210.2.185.102 – 10.2.185.10210.2.185.102
10410.2.185.103/3210.2.185.103 – 10.2.185.10310.2.185.103
10510.2.185.104/3210.2.185.104 – 10.2.185.10410.2.185.104
10610.2.185.105/3210.2.185.105 – 10.2.185.10510.2.185.105
10710.2.185.106/3210.2.185.106 – 10.2.185.10610.2.185.106
10810.2.185.107/3210.2.185.107 – 10.2.185.10710.2.185.107
10910.2.185.108/3210.2.185.108 – 10.2.185.10810.2.185.108
11010.2.185.109/3210.2.185.109 – 10.2.185.10910.2.185.109
11110.2.185.110/3210.2.185.110 – 10.2.185.11010.2.185.110
11210.2.185.111/3210.2.185.111 – 10.2.185.11110.2.185.111
11310.2.185.112/3210.2.185.112 – 10.2.185.11210.2.185.112
11410.2.185.113/3210.2.185.113 – 10.2.185.11310.2.185.113
11510.2.185.114/3210.2.185.114 – 10.2.185.11410.2.185.114
11610.2.185.115/3210.2.185.115 – 10.2.185.11510.2.185.115
11710.2.185.116/3210.2.185.116 – 10.2.185.11610.2.185.116
11810.2.185.117/3210.2.185.117 – 10.2.185.11710.2.185.117
11910.2.185.118/3210.2.185.118 – 10.2.185.11810.2.185.118
12010.2.185.119/3210.2.185.119 – 10.2.185.11910.2.185.119
12110.2.185.120/3210.2.185.120 – 10.2.185.12010.2.185.120
12210.2.185.121/3210.2.185.121 – 10.2.185.12110.2.185.121
12310.2.185.122/3210.2.185.122 – 10.2.185.12210.2.185.122
12410.2.185.123/3210.2.185.123 – 10.2.185.12310.2.185.123
12510.2.185.124/3210.2.185.124 – 10.2.185.12410.2.185.124
12610.2.185.125/3210.2.185.125 – 10.2.185.12510.2.185.125
12710.2.185.126/3210.2.185.126 – 10.2.185.12610.2.185.126
12810.2.185.127/3210.2.185.127 – 10.2.185.12710.2.185.127
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 →