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)10.2.127.0/25
network10.2.127.0/25
broadcast10.2.127.127
first host10.2.127.1
last host10.2.127.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.127.0/25
address00001010.00000010.01111111.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.01111111.00000000
broadcast00001010.00000010.01111111.01111111
green = network part, grey = host part
hex0x0a027f00
decimal167935744
reverse dns0.127.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:7f00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.127.0/3210.2.127.0 – 10.2.127.010.2.127.0
210.2.127.1/3210.2.127.1 – 10.2.127.110.2.127.1
310.2.127.2/3210.2.127.2 – 10.2.127.210.2.127.2
410.2.127.3/3210.2.127.3 – 10.2.127.310.2.127.3
510.2.127.4/3210.2.127.4 – 10.2.127.410.2.127.4
610.2.127.5/3210.2.127.5 – 10.2.127.510.2.127.5
710.2.127.6/3210.2.127.6 – 10.2.127.610.2.127.6
810.2.127.7/3210.2.127.7 – 10.2.127.710.2.127.7
910.2.127.8/3210.2.127.8 – 10.2.127.810.2.127.8
1010.2.127.9/3210.2.127.9 – 10.2.127.910.2.127.9
1110.2.127.10/3210.2.127.10 – 10.2.127.1010.2.127.10
1210.2.127.11/3210.2.127.11 – 10.2.127.1110.2.127.11
1310.2.127.12/3210.2.127.12 – 10.2.127.1210.2.127.12
1410.2.127.13/3210.2.127.13 – 10.2.127.1310.2.127.13
1510.2.127.14/3210.2.127.14 – 10.2.127.1410.2.127.14
1610.2.127.15/3210.2.127.15 – 10.2.127.1510.2.127.15
1710.2.127.16/3210.2.127.16 – 10.2.127.1610.2.127.16
1810.2.127.17/3210.2.127.17 – 10.2.127.1710.2.127.17
1910.2.127.18/3210.2.127.18 – 10.2.127.1810.2.127.18
2010.2.127.19/3210.2.127.19 – 10.2.127.1910.2.127.19
2110.2.127.20/3210.2.127.20 – 10.2.127.2010.2.127.20
2210.2.127.21/3210.2.127.21 – 10.2.127.2110.2.127.21
2310.2.127.22/3210.2.127.22 – 10.2.127.2210.2.127.22
2410.2.127.23/3210.2.127.23 – 10.2.127.2310.2.127.23
2510.2.127.24/3210.2.127.24 – 10.2.127.2410.2.127.24
2610.2.127.25/3210.2.127.25 – 10.2.127.2510.2.127.25
2710.2.127.26/3210.2.127.26 – 10.2.127.2610.2.127.26
2810.2.127.27/3210.2.127.27 – 10.2.127.2710.2.127.27
2910.2.127.28/3210.2.127.28 – 10.2.127.2810.2.127.28
3010.2.127.29/3210.2.127.29 – 10.2.127.2910.2.127.29
3110.2.127.30/3210.2.127.30 – 10.2.127.3010.2.127.30
3210.2.127.31/3210.2.127.31 – 10.2.127.3110.2.127.31
3310.2.127.32/3210.2.127.32 – 10.2.127.3210.2.127.32
3410.2.127.33/3210.2.127.33 – 10.2.127.3310.2.127.33
3510.2.127.34/3210.2.127.34 – 10.2.127.3410.2.127.34
3610.2.127.35/3210.2.127.35 – 10.2.127.3510.2.127.35
3710.2.127.36/3210.2.127.36 – 10.2.127.3610.2.127.36
3810.2.127.37/3210.2.127.37 – 10.2.127.3710.2.127.37
3910.2.127.38/3210.2.127.38 – 10.2.127.3810.2.127.38
4010.2.127.39/3210.2.127.39 – 10.2.127.3910.2.127.39
4110.2.127.40/3210.2.127.40 – 10.2.127.4010.2.127.40
4210.2.127.41/3210.2.127.41 – 10.2.127.4110.2.127.41
4310.2.127.42/3210.2.127.42 – 10.2.127.4210.2.127.42
4410.2.127.43/3210.2.127.43 – 10.2.127.4310.2.127.43
4510.2.127.44/3210.2.127.44 – 10.2.127.4410.2.127.44
4610.2.127.45/3210.2.127.45 – 10.2.127.4510.2.127.45
4710.2.127.46/3210.2.127.46 – 10.2.127.4610.2.127.46
4810.2.127.47/3210.2.127.47 – 10.2.127.4710.2.127.47
4910.2.127.48/3210.2.127.48 – 10.2.127.4810.2.127.48
5010.2.127.49/3210.2.127.49 – 10.2.127.4910.2.127.49
5110.2.127.50/3210.2.127.50 – 10.2.127.5010.2.127.50
5210.2.127.51/3210.2.127.51 – 10.2.127.5110.2.127.51
5310.2.127.52/3210.2.127.52 – 10.2.127.5210.2.127.52
5410.2.127.53/3210.2.127.53 – 10.2.127.5310.2.127.53
5510.2.127.54/3210.2.127.54 – 10.2.127.5410.2.127.54
5610.2.127.55/3210.2.127.55 – 10.2.127.5510.2.127.55
5710.2.127.56/3210.2.127.56 – 10.2.127.5610.2.127.56
5810.2.127.57/3210.2.127.57 – 10.2.127.5710.2.127.57
5910.2.127.58/3210.2.127.58 – 10.2.127.5810.2.127.58
6010.2.127.59/3210.2.127.59 – 10.2.127.5910.2.127.59
6110.2.127.60/3210.2.127.60 – 10.2.127.6010.2.127.60
6210.2.127.61/3210.2.127.61 – 10.2.127.6110.2.127.61
6310.2.127.62/3210.2.127.62 – 10.2.127.6210.2.127.62
6410.2.127.63/3210.2.127.63 – 10.2.127.6310.2.127.63
6510.2.127.64/3210.2.127.64 – 10.2.127.6410.2.127.64
6610.2.127.65/3210.2.127.65 – 10.2.127.6510.2.127.65
6710.2.127.66/3210.2.127.66 – 10.2.127.6610.2.127.66
6810.2.127.67/3210.2.127.67 – 10.2.127.6710.2.127.67
6910.2.127.68/3210.2.127.68 – 10.2.127.6810.2.127.68
7010.2.127.69/3210.2.127.69 – 10.2.127.6910.2.127.69
7110.2.127.70/3210.2.127.70 – 10.2.127.7010.2.127.70
7210.2.127.71/3210.2.127.71 – 10.2.127.7110.2.127.71
7310.2.127.72/3210.2.127.72 – 10.2.127.7210.2.127.72
7410.2.127.73/3210.2.127.73 – 10.2.127.7310.2.127.73
7510.2.127.74/3210.2.127.74 – 10.2.127.7410.2.127.74
7610.2.127.75/3210.2.127.75 – 10.2.127.7510.2.127.75
7710.2.127.76/3210.2.127.76 – 10.2.127.7610.2.127.76
7810.2.127.77/3210.2.127.77 – 10.2.127.7710.2.127.77
7910.2.127.78/3210.2.127.78 – 10.2.127.7810.2.127.78
8010.2.127.79/3210.2.127.79 – 10.2.127.7910.2.127.79
8110.2.127.80/3210.2.127.80 – 10.2.127.8010.2.127.80
8210.2.127.81/3210.2.127.81 – 10.2.127.8110.2.127.81
8310.2.127.82/3210.2.127.82 – 10.2.127.8210.2.127.82
8410.2.127.83/3210.2.127.83 – 10.2.127.8310.2.127.83
8510.2.127.84/3210.2.127.84 – 10.2.127.8410.2.127.84
8610.2.127.85/3210.2.127.85 – 10.2.127.8510.2.127.85
8710.2.127.86/3210.2.127.86 – 10.2.127.8610.2.127.86
8810.2.127.87/3210.2.127.87 – 10.2.127.8710.2.127.87
8910.2.127.88/3210.2.127.88 – 10.2.127.8810.2.127.88
9010.2.127.89/3210.2.127.89 – 10.2.127.8910.2.127.89
9110.2.127.90/3210.2.127.90 – 10.2.127.9010.2.127.90
9210.2.127.91/3210.2.127.91 – 10.2.127.9110.2.127.91
9310.2.127.92/3210.2.127.92 – 10.2.127.9210.2.127.92
9410.2.127.93/3210.2.127.93 – 10.2.127.9310.2.127.93
9510.2.127.94/3210.2.127.94 – 10.2.127.9410.2.127.94
9610.2.127.95/3210.2.127.95 – 10.2.127.9510.2.127.95
9710.2.127.96/3210.2.127.96 – 10.2.127.9610.2.127.96
9810.2.127.97/3210.2.127.97 – 10.2.127.9710.2.127.97
9910.2.127.98/3210.2.127.98 – 10.2.127.9810.2.127.98
10010.2.127.99/3210.2.127.99 – 10.2.127.9910.2.127.99
10110.2.127.100/3210.2.127.100 – 10.2.127.10010.2.127.100
10210.2.127.101/3210.2.127.101 – 10.2.127.10110.2.127.101
10310.2.127.102/3210.2.127.102 – 10.2.127.10210.2.127.102
10410.2.127.103/3210.2.127.103 – 10.2.127.10310.2.127.103
10510.2.127.104/3210.2.127.104 – 10.2.127.10410.2.127.104
10610.2.127.105/3210.2.127.105 – 10.2.127.10510.2.127.105
10710.2.127.106/3210.2.127.106 – 10.2.127.10610.2.127.106
10810.2.127.107/3210.2.127.107 – 10.2.127.10710.2.127.107
10910.2.127.108/3210.2.127.108 – 10.2.127.10810.2.127.108
11010.2.127.109/3210.2.127.109 – 10.2.127.10910.2.127.109
11110.2.127.110/3210.2.127.110 – 10.2.127.11010.2.127.110
11210.2.127.111/3210.2.127.111 – 10.2.127.11110.2.127.111
11310.2.127.112/3210.2.127.112 – 10.2.127.11210.2.127.112
11410.2.127.113/3210.2.127.113 – 10.2.127.11310.2.127.113
11510.2.127.114/3210.2.127.114 – 10.2.127.11410.2.127.114
11610.2.127.115/3210.2.127.115 – 10.2.127.11510.2.127.115
11710.2.127.116/3210.2.127.116 – 10.2.127.11610.2.127.116
11810.2.127.117/3210.2.127.117 – 10.2.127.11710.2.127.117
11910.2.127.118/3210.2.127.118 – 10.2.127.11810.2.127.118
12010.2.127.119/3210.2.127.119 – 10.2.127.11910.2.127.119
12110.2.127.120/3210.2.127.120 – 10.2.127.12010.2.127.120
12210.2.127.121/3210.2.127.121 – 10.2.127.12110.2.127.121
12310.2.127.122/3210.2.127.122 – 10.2.127.12210.2.127.122
12410.2.127.123/3210.2.127.123 – 10.2.127.12310.2.127.123
12510.2.127.124/3210.2.127.124 – 10.2.127.12410.2.127.124
12610.2.127.125/3210.2.127.125 – 10.2.127.12510.2.127.125
12710.2.127.126/3210.2.127.126 – 10.2.127.12610.2.127.126
12810.2.127.127/3210.2.127.127 – 10.2.127.12710.2.127.127
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 →