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)10.4.239.0/25
network10.4.239.0/25
broadcast10.4.239.127
first host10.4.239.1
last host10.4.239.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.4.239.0/25
address00001010.00000100.11101111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000100.11101111.00000000
broadcast00001010.00000100.11101111.01111111
green = network part, grey = host part
hex0x0a04ef00
decimal168095488
reverse dns0.239.4.10.in-addr.arpa
ipv4-mapped::ffff:a04:ef00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.4.239.0/3210.4.239.0 – 10.4.239.010.4.239.0
210.4.239.1/3210.4.239.1 – 10.4.239.110.4.239.1
310.4.239.2/3210.4.239.2 – 10.4.239.210.4.239.2
410.4.239.3/3210.4.239.3 – 10.4.239.310.4.239.3
510.4.239.4/3210.4.239.4 – 10.4.239.410.4.239.4
610.4.239.5/3210.4.239.5 – 10.4.239.510.4.239.5
710.4.239.6/3210.4.239.6 – 10.4.239.610.4.239.6
810.4.239.7/3210.4.239.7 – 10.4.239.710.4.239.7
910.4.239.8/3210.4.239.8 – 10.4.239.810.4.239.8
1010.4.239.9/3210.4.239.9 – 10.4.239.910.4.239.9
1110.4.239.10/3210.4.239.10 – 10.4.239.1010.4.239.10
1210.4.239.11/3210.4.239.11 – 10.4.239.1110.4.239.11
1310.4.239.12/3210.4.239.12 – 10.4.239.1210.4.239.12
1410.4.239.13/3210.4.239.13 – 10.4.239.1310.4.239.13
1510.4.239.14/3210.4.239.14 – 10.4.239.1410.4.239.14
1610.4.239.15/3210.4.239.15 – 10.4.239.1510.4.239.15
1710.4.239.16/3210.4.239.16 – 10.4.239.1610.4.239.16
1810.4.239.17/3210.4.239.17 – 10.4.239.1710.4.239.17
1910.4.239.18/3210.4.239.18 – 10.4.239.1810.4.239.18
2010.4.239.19/3210.4.239.19 – 10.4.239.1910.4.239.19
2110.4.239.20/3210.4.239.20 – 10.4.239.2010.4.239.20
2210.4.239.21/3210.4.239.21 – 10.4.239.2110.4.239.21
2310.4.239.22/3210.4.239.22 – 10.4.239.2210.4.239.22
2410.4.239.23/3210.4.239.23 – 10.4.239.2310.4.239.23
2510.4.239.24/3210.4.239.24 – 10.4.239.2410.4.239.24
2610.4.239.25/3210.4.239.25 – 10.4.239.2510.4.239.25
2710.4.239.26/3210.4.239.26 – 10.4.239.2610.4.239.26
2810.4.239.27/3210.4.239.27 – 10.4.239.2710.4.239.27
2910.4.239.28/3210.4.239.28 – 10.4.239.2810.4.239.28
3010.4.239.29/3210.4.239.29 – 10.4.239.2910.4.239.29
3110.4.239.30/3210.4.239.30 – 10.4.239.3010.4.239.30
3210.4.239.31/3210.4.239.31 – 10.4.239.3110.4.239.31
3310.4.239.32/3210.4.239.32 – 10.4.239.3210.4.239.32
3410.4.239.33/3210.4.239.33 – 10.4.239.3310.4.239.33
3510.4.239.34/3210.4.239.34 – 10.4.239.3410.4.239.34
3610.4.239.35/3210.4.239.35 – 10.4.239.3510.4.239.35
3710.4.239.36/3210.4.239.36 – 10.4.239.3610.4.239.36
3810.4.239.37/3210.4.239.37 – 10.4.239.3710.4.239.37
3910.4.239.38/3210.4.239.38 – 10.4.239.3810.4.239.38
4010.4.239.39/3210.4.239.39 – 10.4.239.3910.4.239.39
4110.4.239.40/3210.4.239.40 – 10.4.239.4010.4.239.40
4210.4.239.41/3210.4.239.41 – 10.4.239.4110.4.239.41
4310.4.239.42/3210.4.239.42 – 10.4.239.4210.4.239.42
4410.4.239.43/3210.4.239.43 – 10.4.239.4310.4.239.43
4510.4.239.44/3210.4.239.44 – 10.4.239.4410.4.239.44
4610.4.239.45/3210.4.239.45 – 10.4.239.4510.4.239.45
4710.4.239.46/3210.4.239.46 – 10.4.239.4610.4.239.46
4810.4.239.47/3210.4.239.47 – 10.4.239.4710.4.239.47
4910.4.239.48/3210.4.239.48 – 10.4.239.4810.4.239.48
5010.4.239.49/3210.4.239.49 – 10.4.239.4910.4.239.49
5110.4.239.50/3210.4.239.50 – 10.4.239.5010.4.239.50
5210.4.239.51/3210.4.239.51 – 10.4.239.5110.4.239.51
5310.4.239.52/3210.4.239.52 – 10.4.239.5210.4.239.52
5410.4.239.53/3210.4.239.53 – 10.4.239.5310.4.239.53
5510.4.239.54/3210.4.239.54 – 10.4.239.5410.4.239.54
5610.4.239.55/3210.4.239.55 – 10.4.239.5510.4.239.55
5710.4.239.56/3210.4.239.56 – 10.4.239.5610.4.239.56
5810.4.239.57/3210.4.239.57 – 10.4.239.5710.4.239.57
5910.4.239.58/3210.4.239.58 – 10.4.239.5810.4.239.58
6010.4.239.59/3210.4.239.59 – 10.4.239.5910.4.239.59
6110.4.239.60/3210.4.239.60 – 10.4.239.6010.4.239.60
6210.4.239.61/3210.4.239.61 – 10.4.239.6110.4.239.61
6310.4.239.62/3210.4.239.62 – 10.4.239.6210.4.239.62
6410.4.239.63/3210.4.239.63 – 10.4.239.6310.4.239.63
6510.4.239.64/3210.4.239.64 – 10.4.239.6410.4.239.64
6610.4.239.65/3210.4.239.65 – 10.4.239.6510.4.239.65
6710.4.239.66/3210.4.239.66 – 10.4.239.6610.4.239.66
6810.4.239.67/3210.4.239.67 – 10.4.239.6710.4.239.67
6910.4.239.68/3210.4.239.68 – 10.4.239.6810.4.239.68
7010.4.239.69/3210.4.239.69 – 10.4.239.6910.4.239.69
7110.4.239.70/3210.4.239.70 – 10.4.239.7010.4.239.70
7210.4.239.71/3210.4.239.71 – 10.4.239.7110.4.239.71
7310.4.239.72/3210.4.239.72 – 10.4.239.7210.4.239.72
7410.4.239.73/3210.4.239.73 – 10.4.239.7310.4.239.73
7510.4.239.74/3210.4.239.74 – 10.4.239.7410.4.239.74
7610.4.239.75/3210.4.239.75 – 10.4.239.7510.4.239.75
7710.4.239.76/3210.4.239.76 – 10.4.239.7610.4.239.76
7810.4.239.77/3210.4.239.77 – 10.4.239.7710.4.239.77
7910.4.239.78/3210.4.239.78 – 10.4.239.7810.4.239.78
8010.4.239.79/3210.4.239.79 – 10.4.239.7910.4.239.79
8110.4.239.80/3210.4.239.80 – 10.4.239.8010.4.239.80
8210.4.239.81/3210.4.239.81 – 10.4.239.8110.4.239.81
8310.4.239.82/3210.4.239.82 – 10.4.239.8210.4.239.82
8410.4.239.83/3210.4.239.83 – 10.4.239.8310.4.239.83
8510.4.239.84/3210.4.239.84 – 10.4.239.8410.4.239.84
8610.4.239.85/3210.4.239.85 – 10.4.239.8510.4.239.85
8710.4.239.86/3210.4.239.86 – 10.4.239.8610.4.239.86
8810.4.239.87/3210.4.239.87 – 10.4.239.8710.4.239.87
8910.4.239.88/3210.4.239.88 – 10.4.239.8810.4.239.88
9010.4.239.89/3210.4.239.89 – 10.4.239.8910.4.239.89
9110.4.239.90/3210.4.239.90 – 10.4.239.9010.4.239.90
9210.4.239.91/3210.4.239.91 – 10.4.239.9110.4.239.91
9310.4.239.92/3210.4.239.92 – 10.4.239.9210.4.239.92
9410.4.239.93/3210.4.239.93 – 10.4.239.9310.4.239.93
9510.4.239.94/3210.4.239.94 – 10.4.239.9410.4.239.94
9610.4.239.95/3210.4.239.95 – 10.4.239.9510.4.239.95
9710.4.239.96/3210.4.239.96 – 10.4.239.9610.4.239.96
9810.4.239.97/3210.4.239.97 – 10.4.239.9710.4.239.97
9910.4.239.98/3210.4.239.98 – 10.4.239.9810.4.239.98
10010.4.239.99/3210.4.239.99 – 10.4.239.9910.4.239.99
10110.4.239.100/3210.4.239.100 – 10.4.239.10010.4.239.100
10210.4.239.101/3210.4.239.101 – 10.4.239.10110.4.239.101
10310.4.239.102/3210.4.239.102 – 10.4.239.10210.4.239.102
10410.4.239.103/3210.4.239.103 – 10.4.239.10310.4.239.103
10510.4.239.104/3210.4.239.104 – 10.4.239.10410.4.239.104
10610.4.239.105/3210.4.239.105 – 10.4.239.10510.4.239.105
10710.4.239.106/3210.4.239.106 – 10.4.239.10610.4.239.106
10810.4.239.107/3210.4.239.107 – 10.4.239.10710.4.239.107
10910.4.239.108/3210.4.239.108 – 10.4.239.10810.4.239.108
11010.4.239.109/3210.4.239.109 – 10.4.239.10910.4.239.109
11110.4.239.110/3210.4.239.110 – 10.4.239.11010.4.239.110
11210.4.239.111/3210.4.239.111 – 10.4.239.11110.4.239.111
11310.4.239.112/3210.4.239.112 – 10.4.239.11210.4.239.112
11410.4.239.113/3210.4.239.113 – 10.4.239.11310.4.239.113
11510.4.239.114/3210.4.239.114 – 10.4.239.11410.4.239.114
11610.4.239.115/3210.4.239.115 – 10.4.239.11510.4.239.115
11710.4.239.116/3210.4.239.116 – 10.4.239.11610.4.239.116
11810.4.239.117/3210.4.239.117 – 10.4.239.11710.4.239.117
11910.4.239.118/3210.4.239.118 – 10.4.239.11810.4.239.118
12010.4.239.119/3210.4.239.119 – 10.4.239.11910.4.239.119
12110.4.239.120/3210.4.239.120 – 10.4.239.12010.4.239.120
12210.4.239.121/3210.4.239.121 – 10.4.239.12110.4.239.121
12310.4.239.122/3210.4.239.122 – 10.4.239.12210.4.239.122
12410.4.239.123/3210.4.239.123 – 10.4.239.12310.4.239.123
12510.4.239.124/3210.4.239.124 – 10.4.239.12410.4.239.124
12610.4.239.125/3210.4.239.125 – 10.4.239.12510.4.239.125
12710.4.239.126/3210.4.239.126 – 10.4.239.12610.4.239.126
12810.4.239.127/3210.4.239.127 – 10.4.239.12710.4.239.127
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 →