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)10.3.139.0/25
network10.3.139.0/25
broadcast10.3.139.127
first host10.3.139.1
last host10.3.139.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.3.139.0/25
address00001010.00000011.10001011.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000011.10001011.00000000
broadcast00001010.00000011.10001011.01111111
green = network part, grey = host part
hex0x0a038b00
decimal168004352
reverse dns0.139.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:8b00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.139.0/3210.3.139.0 – 10.3.139.010.3.139.0
210.3.139.1/3210.3.139.1 – 10.3.139.110.3.139.1
310.3.139.2/3210.3.139.2 – 10.3.139.210.3.139.2
410.3.139.3/3210.3.139.3 – 10.3.139.310.3.139.3
510.3.139.4/3210.3.139.4 – 10.3.139.410.3.139.4
610.3.139.5/3210.3.139.5 – 10.3.139.510.3.139.5
710.3.139.6/3210.3.139.6 – 10.3.139.610.3.139.6
810.3.139.7/3210.3.139.7 – 10.3.139.710.3.139.7
910.3.139.8/3210.3.139.8 – 10.3.139.810.3.139.8
1010.3.139.9/3210.3.139.9 – 10.3.139.910.3.139.9
1110.3.139.10/3210.3.139.10 – 10.3.139.1010.3.139.10
1210.3.139.11/3210.3.139.11 – 10.3.139.1110.3.139.11
1310.3.139.12/3210.3.139.12 – 10.3.139.1210.3.139.12
1410.3.139.13/3210.3.139.13 – 10.3.139.1310.3.139.13
1510.3.139.14/3210.3.139.14 – 10.3.139.1410.3.139.14
1610.3.139.15/3210.3.139.15 – 10.3.139.1510.3.139.15
1710.3.139.16/3210.3.139.16 – 10.3.139.1610.3.139.16
1810.3.139.17/3210.3.139.17 – 10.3.139.1710.3.139.17
1910.3.139.18/3210.3.139.18 – 10.3.139.1810.3.139.18
2010.3.139.19/3210.3.139.19 – 10.3.139.1910.3.139.19
2110.3.139.20/3210.3.139.20 – 10.3.139.2010.3.139.20
2210.3.139.21/3210.3.139.21 – 10.3.139.2110.3.139.21
2310.3.139.22/3210.3.139.22 – 10.3.139.2210.3.139.22
2410.3.139.23/3210.3.139.23 – 10.3.139.2310.3.139.23
2510.3.139.24/3210.3.139.24 – 10.3.139.2410.3.139.24
2610.3.139.25/3210.3.139.25 – 10.3.139.2510.3.139.25
2710.3.139.26/3210.3.139.26 – 10.3.139.2610.3.139.26
2810.3.139.27/3210.3.139.27 – 10.3.139.2710.3.139.27
2910.3.139.28/3210.3.139.28 – 10.3.139.2810.3.139.28
3010.3.139.29/3210.3.139.29 – 10.3.139.2910.3.139.29
3110.3.139.30/3210.3.139.30 – 10.3.139.3010.3.139.30
3210.3.139.31/3210.3.139.31 – 10.3.139.3110.3.139.31
3310.3.139.32/3210.3.139.32 – 10.3.139.3210.3.139.32
3410.3.139.33/3210.3.139.33 – 10.3.139.3310.3.139.33
3510.3.139.34/3210.3.139.34 – 10.3.139.3410.3.139.34
3610.3.139.35/3210.3.139.35 – 10.3.139.3510.3.139.35
3710.3.139.36/3210.3.139.36 – 10.3.139.3610.3.139.36
3810.3.139.37/3210.3.139.37 – 10.3.139.3710.3.139.37
3910.3.139.38/3210.3.139.38 – 10.3.139.3810.3.139.38
4010.3.139.39/3210.3.139.39 – 10.3.139.3910.3.139.39
4110.3.139.40/3210.3.139.40 – 10.3.139.4010.3.139.40
4210.3.139.41/3210.3.139.41 – 10.3.139.4110.3.139.41
4310.3.139.42/3210.3.139.42 – 10.3.139.4210.3.139.42
4410.3.139.43/3210.3.139.43 – 10.3.139.4310.3.139.43
4510.3.139.44/3210.3.139.44 – 10.3.139.4410.3.139.44
4610.3.139.45/3210.3.139.45 – 10.3.139.4510.3.139.45
4710.3.139.46/3210.3.139.46 – 10.3.139.4610.3.139.46
4810.3.139.47/3210.3.139.47 – 10.3.139.4710.3.139.47
4910.3.139.48/3210.3.139.48 – 10.3.139.4810.3.139.48
5010.3.139.49/3210.3.139.49 – 10.3.139.4910.3.139.49
5110.3.139.50/3210.3.139.50 – 10.3.139.5010.3.139.50
5210.3.139.51/3210.3.139.51 – 10.3.139.5110.3.139.51
5310.3.139.52/3210.3.139.52 – 10.3.139.5210.3.139.52
5410.3.139.53/3210.3.139.53 – 10.3.139.5310.3.139.53
5510.3.139.54/3210.3.139.54 – 10.3.139.5410.3.139.54
5610.3.139.55/3210.3.139.55 – 10.3.139.5510.3.139.55
5710.3.139.56/3210.3.139.56 – 10.3.139.5610.3.139.56
5810.3.139.57/3210.3.139.57 – 10.3.139.5710.3.139.57
5910.3.139.58/3210.3.139.58 – 10.3.139.5810.3.139.58
6010.3.139.59/3210.3.139.59 – 10.3.139.5910.3.139.59
6110.3.139.60/3210.3.139.60 – 10.3.139.6010.3.139.60
6210.3.139.61/3210.3.139.61 – 10.3.139.6110.3.139.61
6310.3.139.62/3210.3.139.62 – 10.3.139.6210.3.139.62
6410.3.139.63/3210.3.139.63 – 10.3.139.6310.3.139.63
6510.3.139.64/3210.3.139.64 – 10.3.139.6410.3.139.64
6610.3.139.65/3210.3.139.65 – 10.3.139.6510.3.139.65
6710.3.139.66/3210.3.139.66 – 10.3.139.6610.3.139.66
6810.3.139.67/3210.3.139.67 – 10.3.139.6710.3.139.67
6910.3.139.68/3210.3.139.68 – 10.3.139.6810.3.139.68
7010.3.139.69/3210.3.139.69 – 10.3.139.6910.3.139.69
7110.3.139.70/3210.3.139.70 – 10.3.139.7010.3.139.70
7210.3.139.71/3210.3.139.71 – 10.3.139.7110.3.139.71
7310.3.139.72/3210.3.139.72 – 10.3.139.7210.3.139.72
7410.3.139.73/3210.3.139.73 – 10.3.139.7310.3.139.73
7510.3.139.74/3210.3.139.74 – 10.3.139.7410.3.139.74
7610.3.139.75/3210.3.139.75 – 10.3.139.7510.3.139.75
7710.3.139.76/3210.3.139.76 – 10.3.139.7610.3.139.76
7810.3.139.77/3210.3.139.77 – 10.3.139.7710.3.139.77
7910.3.139.78/3210.3.139.78 – 10.3.139.7810.3.139.78
8010.3.139.79/3210.3.139.79 – 10.3.139.7910.3.139.79
8110.3.139.80/3210.3.139.80 – 10.3.139.8010.3.139.80
8210.3.139.81/3210.3.139.81 – 10.3.139.8110.3.139.81
8310.3.139.82/3210.3.139.82 – 10.3.139.8210.3.139.82
8410.3.139.83/3210.3.139.83 – 10.3.139.8310.3.139.83
8510.3.139.84/3210.3.139.84 – 10.3.139.8410.3.139.84
8610.3.139.85/3210.3.139.85 – 10.3.139.8510.3.139.85
8710.3.139.86/3210.3.139.86 – 10.3.139.8610.3.139.86
8810.3.139.87/3210.3.139.87 – 10.3.139.8710.3.139.87
8910.3.139.88/3210.3.139.88 – 10.3.139.8810.3.139.88
9010.3.139.89/3210.3.139.89 – 10.3.139.8910.3.139.89
9110.3.139.90/3210.3.139.90 – 10.3.139.9010.3.139.90
9210.3.139.91/3210.3.139.91 – 10.3.139.9110.3.139.91
9310.3.139.92/3210.3.139.92 – 10.3.139.9210.3.139.92
9410.3.139.93/3210.3.139.93 – 10.3.139.9310.3.139.93
9510.3.139.94/3210.3.139.94 – 10.3.139.9410.3.139.94
9610.3.139.95/3210.3.139.95 – 10.3.139.9510.3.139.95
9710.3.139.96/3210.3.139.96 – 10.3.139.9610.3.139.96
9810.3.139.97/3210.3.139.97 – 10.3.139.9710.3.139.97
9910.3.139.98/3210.3.139.98 – 10.3.139.9810.3.139.98
10010.3.139.99/3210.3.139.99 – 10.3.139.9910.3.139.99
10110.3.139.100/3210.3.139.100 – 10.3.139.10010.3.139.100
10210.3.139.101/3210.3.139.101 – 10.3.139.10110.3.139.101
10310.3.139.102/3210.3.139.102 – 10.3.139.10210.3.139.102
10410.3.139.103/3210.3.139.103 – 10.3.139.10310.3.139.103
10510.3.139.104/3210.3.139.104 – 10.3.139.10410.3.139.104
10610.3.139.105/3210.3.139.105 – 10.3.139.10510.3.139.105
10710.3.139.106/3210.3.139.106 – 10.3.139.10610.3.139.106
10810.3.139.107/3210.3.139.107 – 10.3.139.10710.3.139.107
10910.3.139.108/3210.3.139.108 – 10.3.139.10810.3.139.108
11010.3.139.109/3210.3.139.109 – 10.3.139.10910.3.139.109
11110.3.139.110/3210.3.139.110 – 10.3.139.11010.3.139.110
11210.3.139.111/3210.3.139.111 – 10.3.139.11110.3.139.111
11310.3.139.112/3210.3.139.112 – 10.3.139.11210.3.139.112
11410.3.139.113/3210.3.139.113 – 10.3.139.11310.3.139.113
11510.3.139.114/3210.3.139.114 – 10.3.139.11410.3.139.114
11610.3.139.115/3210.3.139.115 – 10.3.139.11510.3.139.115
11710.3.139.116/3210.3.139.116 – 10.3.139.11610.3.139.116
11810.3.139.117/3210.3.139.117 – 10.3.139.11710.3.139.117
11910.3.139.118/3210.3.139.118 – 10.3.139.11810.3.139.118
12010.3.139.119/3210.3.139.119 – 10.3.139.11910.3.139.119
12110.3.139.120/3210.3.139.120 – 10.3.139.12010.3.139.120
12210.3.139.121/3210.3.139.121 – 10.3.139.12110.3.139.121
12310.3.139.122/3210.3.139.122 – 10.3.139.12210.3.139.122
12410.3.139.123/3210.3.139.123 – 10.3.139.12310.3.139.123
12510.3.139.124/3210.3.139.124 – 10.3.139.12410.3.139.124
12610.3.139.125/3210.3.139.125 – 10.3.139.12510.3.139.125
12710.3.139.126/3210.3.139.126 – 10.3.139.12610.3.139.126
12810.3.139.127/3210.3.139.127 – 10.3.139.12710.3.139.127
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 →