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)10.2.55.0/25
network10.2.55.0/25
broadcast10.2.55.127
first host10.2.55.1
last host10.2.55.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.55.0/25
address00001010.00000010.00110111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00110111.00000000
broadcast00001010.00000010.00110111.01111111
green = network part, grey = host part
hex0x0a023700
decimal167917312
reverse dns0.55.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:3700

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.55.0/3210.2.55.0 – 10.2.55.010.2.55.0
210.2.55.1/3210.2.55.1 – 10.2.55.110.2.55.1
310.2.55.2/3210.2.55.2 – 10.2.55.210.2.55.2
410.2.55.3/3210.2.55.3 – 10.2.55.310.2.55.3
510.2.55.4/3210.2.55.4 – 10.2.55.410.2.55.4
610.2.55.5/3210.2.55.5 – 10.2.55.510.2.55.5
710.2.55.6/3210.2.55.6 – 10.2.55.610.2.55.6
810.2.55.7/3210.2.55.7 – 10.2.55.710.2.55.7
910.2.55.8/3210.2.55.8 – 10.2.55.810.2.55.8
1010.2.55.9/3210.2.55.9 – 10.2.55.910.2.55.9
1110.2.55.10/3210.2.55.10 – 10.2.55.1010.2.55.10
1210.2.55.11/3210.2.55.11 – 10.2.55.1110.2.55.11
1310.2.55.12/3210.2.55.12 – 10.2.55.1210.2.55.12
1410.2.55.13/3210.2.55.13 – 10.2.55.1310.2.55.13
1510.2.55.14/3210.2.55.14 – 10.2.55.1410.2.55.14
1610.2.55.15/3210.2.55.15 – 10.2.55.1510.2.55.15
1710.2.55.16/3210.2.55.16 – 10.2.55.1610.2.55.16
1810.2.55.17/3210.2.55.17 – 10.2.55.1710.2.55.17
1910.2.55.18/3210.2.55.18 – 10.2.55.1810.2.55.18
2010.2.55.19/3210.2.55.19 – 10.2.55.1910.2.55.19
2110.2.55.20/3210.2.55.20 – 10.2.55.2010.2.55.20
2210.2.55.21/3210.2.55.21 – 10.2.55.2110.2.55.21
2310.2.55.22/3210.2.55.22 – 10.2.55.2210.2.55.22
2410.2.55.23/3210.2.55.23 – 10.2.55.2310.2.55.23
2510.2.55.24/3210.2.55.24 – 10.2.55.2410.2.55.24
2610.2.55.25/3210.2.55.25 – 10.2.55.2510.2.55.25
2710.2.55.26/3210.2.55.26 – 10.2.55.2610.2.55.26
2810.2.55.27/3210.2.55.27 – 10.2.55.2710.2.55.27
2910.2.55.28/3210.2.55.28 – 10.2.55.2810.2.55.28
3010.2.55.29/3210.2.55.29 – 10.2.55.2910.2.55.29
3110.2.55.30/3210.2.55.30 – 10.2.55.3010.2.55.30
3210.2.55.31/3210.2.55.31 – 10.2.55.3110.2.55.31
3310.2.55.32/3210.2.55.32 – 10.2.55.3210.2.55.32
3410.2.55.33/3210.2.55.33 – 10.2.55.3310.2.55.33
3510.2.55.34/3210.2.55.34 – 10.2.55.3410.2.55.34
3610.2.55.35/3210.2.55.35 – 10.2.55.3510.2.55.35
3710.2.55.36/3210.2.55.36 – 10.2.55.3610.2.55.36
3810.2.55.37/3210.2.55.37 – 10.2.55.3710.2.55.37
3910.2.55.38/3210.2.55.38 – 10.2.55.3810.2.55.38
4010.2.55.39/3210.2.55.39 – 10.2.55.3910.2.55.39
4110.2.55.40/3210.2.55.40 – 10.2.55.4010.2.55.40
4210.2.55.41/3210.2.55.41 – 10.2.55.4110.2.55.41
4310.2.55.42/3210.2.55.42 – 10.2.55.4210.2.55.42
4410.2.55.43/3210.2.55.43 – 10.2.55.4310.2.55.43
4510.2.55.44/3210.2.55.44 – 10.2.55.4410.2.55.44
4610.2.55.45/3210.2.55.45 – 10.2.55.4510.2.55.45
4710.2.55.46/3210.2.55.46 – 10.2.55.4610.2.55.46
4810.2.55.47/3210.2.55.47 – 10.2.55.4710.2.55.47
4910.2.55.48/3210.2.55.48 – 10.2.55.4810.2.55.48
5010.2.55.49/3210.2.55.49 – 10.2.55.4910.2.55.49
5110.2.55.50/3210.2.55.50 – 10.2.55.5010.2.55.50
5210.2.55.51/3210.2.55.51 – 10.2.55.5110.2.55.51
5310.2.55.52/3210.2.55.52 – 10.2.55.5210.2.55.52
5410.2.55.53/3210.2.55.53 – 10.2.55.5310.2.55.53
5510.2.55.54/3210.2.55.54 – 10.2.55.5410.2.55.54
5610.2.55.55/3210.2.55.55 – 10.2.55.5510.2.55.55
5710.2.55.56/3210.2.55.56 – 10.2.55.5610.2.55.56
5810.2.55.57/3210.2.55.57 – 10.2.55.5710.2.55.57
5910.2.55.58/3210.2.55.58 – 10.2.55.5810.2.55.58
6010.2.55.59/3210.2.55.59 – 10.2.55.5910.2.55.59
6110.2.55.60/3210.2.55.60 – 10.2.55.6010.2.55.60
6210.2.55.61/3210.2.55.61 – 10.2.55.6110.2.55.61
6310.2.55.62/3210.2.55.62 – 10.2.55.6210.2.55.62
6410.2.55.63/3210.2.55.63 – 10.2.55.6310.2.55.63
6510.2.55.64/3210.2.55.64 – 10.2.55.6410.2.55.64
6610.2.55.65/3210.2.55.65 – 10.2.55.6510.2.55.65
6710.2.55.66/3210.2.55.66 – 10.2.55.6610.2.55.66
6810.2.55.67/3210.2.55.67 – 10.2.55.6710.2.55.67
6910.2.55.68/3210.2.55.68 – 10.2.55.6810.2.55.68
7010.2.55.69/3210.2.55.69 – 10.2.55.6910.2.55.69
7110.2.55.70/3210.2.55.70 – 10.2.55.7010.2.55.70
7210.2.55.71/3210.2.55.71 – 10.2.55.7110.2.55.71
7310.2.55.72/3210.2.55.72 – 10.2.55.7210.2.55.72
7410.2.55.73/3210.2.55.73 – 10.2.55.7310.2.55.73
7510.2.55.74/3210.2.55.74 – 10.2.55.7410.2.55.74
7610.2.55.75/3210.2.55.75 – 10.2.55.7510.2.55.75
7710.2.55.76/3210.2.55.76 – 10.2.55.7610.2.55.76
7810.2.55.77/3210.2.55.77 – 10.2.55.7710.2.55.77
7910.2.55.78/3210.2.55.78 – 10.2.55.7810.2.55.78
8010.2.55.79/3210.2.55.79 – 10.2.55.7910.2.55.79
8110.2.55.80/3210.2.55.80 – 10.2.55.8010.2.55.80
8210.2.55.81/3210.2.55.81 – 10.2.55.8110.2.55.81
8310.2.55.82/3210.2.55.82 – 10.2.55.8210.2.55.82
8410.2.55.83/3210.2.55.83 – 10.2.55.8310.2.55.83
8510.2.55.84/3210.2.55.84 – 10.2.55.8410.2.55.84
8610.2.55.85/3210.2.55.85 – 10.2.55.8510.2.55.85
8710.2.55.86/3210.2.55.86 – 10.2.55.8610.2.55.86
8810.2.55.87/3210.2.55.87 – 10.2.55.8710.2.55.87
8910.2.55.88/3210.2.55.88 – 10.2.55.8810.2.55.88
9010.2.55.89/3210.2.55.89 – 10.2.55.8910.2.55.89
9110.2.55.90/3210.2.55.90 – 10.2.55.9010.2.55.90
9210.2.55.91/3210.2.55.91 – 10.2.55.9110.2.55.91
9310.2.55.92/3210.2.55.92 – 10.2.55.9210.2.55.92
9410.2.55.93/3210.2.55.93 – 10.2.55.9310.2.55.93
9510.2.55.94/3210.2.55.94 – 10.2.55.9410.2.55.94
9610.2.55.95/3210.2.55.95 – 10.2.55.9510.2.55.95
9710.2.55.96/3210.2.55.96 – 10.2.55.9610.2.55.96
9810.2.55.97/3210.2.55.97 – 10.2.55.9710.2.55.97
9910.2.55.98/3210.2.55.98 – 10.2.55.9810.2.55.98
10010.2.55.99/3210.2.55.99 – 10.2.55.9910.2.55.99
10110.2.55.100/3210.2.55.100 – 10.2.55.10010.2.55.100
10210.2.55.101/3210.2.55.101 – 10.2.55.10110.2.55.101
10310.2.55.102/3210.2.55.102 – 10.2.55.10210.2.55.102
10410.2.55.103/3210.2.55.103 – 10.2.55.10310.2.55.103
10510.2.55.104/3210.2.55.104 – 10.2.55.10410.2.55.104
10610.2.55.105/3210.2.55.105 – 10.2.55.10510.2.55.105
10710.2.55.106/3210.2.55.106 – 10.2.55.10610.2.55.106
10810.2.55.107/3210.2.55.107 – 10.2.55.10710.2.55.107
10910.2.55.108/3210.2.55.108 – 10.2.55.10810.2.55.108
11010.2.55.109/3210.2.55.109 – 10.2.55.10910.2.55.109
11110.2.55.110/3210.2.55.110 – 10.2.55.11010.2.55.110
11210.2.55.111/3210.2.55.111 – 10.2.55.11110.2.55.111
11310.2.55.112/3210.2.55.112 – 10.2.55.11210.2.55.112
11410.2.55.113/3210.2.55.113 – 10.2.55.11310.2.55.113
11510.2.55.114/3210.2.55.114 – 10.2.55.11410.2.55.114
11610.2.55.115/3210.2.55.115 – 10.2.55.11510.2.55.115
11710.2.55.116/3210.2.55.116 – 10.2.55.11610.2.55.116
11810.2.55.117/3210.2.55.117 – 10.2.55.11710.2.55.117
11910.2.55.118/3210.2.55.118 – 10.2.55.11810.2.55.118
12010.2.55.119/3210.2.55.119 – 10.2.55.11910.2.55.119
12110.2.55.120/3210.2.55.120 – 10.2.55.12010.2.55.120
12210.2.55.121/3210.2.55.121 – 10.2.55.12110.2.55.121
12310.2.55.122/3210.2.55.122 – 10.2.55.12210.2.55.122
12410.2.55.123/3210.2.55.123 – 10.2.55.12310.2.55.123
12510.2.55.124/3210.2.55.124 – 10.2.55.12410.2.55.124
12610.2.55.125/3210.2.55.125 – 10.2.55.12510.2.55.125
12710.2.55.126/3210.2.55.126 – 10.2.55.12610.2.55.126
12810.2.55.127/3210.2.55.127 – 10.2.55.12710.2.55.127
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 →