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)10.35.45.0/25
network10.35.45.0/25
broadcast10.35.45.127
first host10.35.45.1
last host10.35.45.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.35.45.0/25
address00001010.00100011.00101101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00100011.00101101.00000000
broadcast00001010.00100011.00101101.01111111
green = network part, grey = host part
hex0x0a232d00
decimal170077440
reverse dns0.45.35.10.in-addr.arpa
ipv4-mapped::ffff:a23:2d00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.35.45.0/3210.35.45.0 – 10.35.45.010.35.45.0
210.35.45.1/3210.35.45.1 – 10.35.45.110.35.45.1
310.35.45.2/3210.35.45.2 – 10.35.45.210.35.45.2
410.35.45.3/3210.35.45.3 – 10.35.45.310.35.45.3
510.35.45.4/3210.35.45.4 – 10.35.45.410.35.45.4
610.35.45.5/3210.35.45.5 – 10.35.45.510.35.45.5
710.35.45.6/3210.35.45.6 – 10.35.45.610.35.45.6
810.35.45.7/3210.35.45.7 – 10.35.45.710.35.45.7
910.35.45.8/3210.35.45.8 – 10.35.45.810.35.45.8
1010.35.45.9/3210.35.45.9 – 10.35.45.910.35.45.9
1110.35.45.10/3210.35.45.10 – 10.35.45.1010.35.45.10
1210.35.45.11/3210.35.45.11 – 10.35.45.1110.35.45.11
1310.35.45.12/3210.35.45.12 – 10.35.45.1210.35.45.12
1410.35.45.13/3210.35.45.13 – 10.35.45.1310.35.45.13
1510.35.45.14/3210.35.45.14 – 10.35.45.1410.35.45.14
1610.35.45.15/3210.35.45.15 – 10.35.45.1510.35.45.15
1710.35.45.16/3210.35.45.16 – 10.35.45.1610.35.45.16
1810.35.45.17/3210.35.45.17 – 10.35.45.1710.35.45.17
1910.35.45.18/3210.35.45.18 – 10.35.45.1810.35.45.18
2010.35.45.19/3210.35.45.19 – 10.35.45.1910.35.45.19
2110.35.45.20/3210.35.45.20 – 10.35.45.2010.35.45.20
2210.35.45.21/3210.35.45.21 – 10.35.45.2110.35.45.21
2310.35.45.22/3210.35.45.22 – 10.35.45.2210.35.45.22
2410.35.45.23/3210.35.45.23 – 10.35.45.2310.35.45.23
2510.35.45.24/3210.35.45.24 – 10.35.45.2410.35.45.24
2610.35.45.25/3210.35.45.25 – 10.35.45.2510.35.45.25
2710.35.45.26/3210.35.45.26 – 10.35.45.2610.35.45.26
2810.35.45.27/3210.35.45.27 – 10.35.45.2710.35.45.27
2910.35.45.28/3210.35.45.28 – 10.35.45.2810.35.45.28
3010.35.45.29/3210.35.45.29 – 10.35.45.2910.35.45.29
3110.35.45.30/3210.35.45.30 – 10.35.45.3010.35.45.30
3210.35.45.31/3210.35.45.31 – 10.35.45.3110.35.45.31
3310.35.45.32/3210.35.45.32 – 10.35.45.3210.35.45.32
3410.35.45.33/3210.35.45.33 – 10.35.45.3310.35.45.33
3510.35.45.34/3210.35.45.34 – 10.35.45.3410.35.45.34
3610.35.45.35/3210.35.45.35 – 10.35.45.3510.35.45.35
3710.35.45.36/3210.35.45.36 – 10.35.45.3610.35.45.36
3810.35.45.37/3210.35.45.37 – 10.35.45.3710.35.45.37
3910.35.45.38/3210.35.45.38 – 10.35.45.3810.35.45.38
4010.35.45.39/3210.35.45.39 – 10.35.45.3910.35.45.39
4110.35.45.40/3210.35.45.40 – 10.35.45.4010.35.45.40
4210.35.45.41/3210.35.45.41 – 10.35.45.4110.35.45.41
4310.35.45.42/3210.35.45.42 – 10.35.45.4210.35.45.42
4410.35.45.43/3210.35.45.43 – 10.35.45.4310.35.45.43
4510.35.45.44/3210.35.45.44 – 10.35.45.4410.35.45.44
4610.35.45.45/3210.35.45.45 – 10.35.45.4510.35.45.45
4710.35.45.46/3210.35.45.46 – 10.35.45.4610.35.45.46
4810.35.45.47/3210.35.45.47 – 10.35.45.4710.35.45.47
4910.35.45.48/3210.35.45.48 – 10.35.45.4810.35.45.48
5010.35.45.49/3210.35.45.49 – 10.35.45.4910.35.45.49
5110.35.45.50/3210.35.45.50 – 10.35.45.5010.35.45.50
5210.35.45.51/3210.35.45.51 – 10.35.45.5110.35.45.51
5310.35.45.52/3210.35.45.52 – 10.35.45.5210.35.45.52
5410.35.45.53/3210.35.45.53 – 10.35.45.5310.35.45.53
5510.35.45.54/3210.35.45.54 – 10.35.45.5410.35.45.54
5610.35.45.55/3210.35.45.55 – 10.35.45.5510.35.45.55
5710.35.45.56/3210.35.45.56 – 10.35.45.5610.35.45.56
5810.35.45.57/3210.35.45.57 – 10.35.45.5710.35.45.57
5910.35.45.58/3210.35.45.58 – 10.35.45.5810.35.45.58
6010.35.45.59/3210.35.45.59 – 10.35.45.5910.35.45.59
6110.35.45.60/3210.35.45.60 – 10.35.45.6010.35.45.60
6210.35.45.61/3210.35.45.61 – 10.35.45.6110.35.45.61
6310.35.45.62/3210.35.45.62 – 10.35.45.6210.35.45.62
6410.35.45.63/3210.35.45.63 – 10.35.45.6310.35.45.63
6510.35.45.64/3210.35.45.64 – 10.35.45.6410.35.45.64
6610.35.45.65/3210.35.45.65 – 10.35.45.6510.35.45.65
6710.35.45.66/3210.35.45.66 – 10.35.45.6610.35.45.66
6810.35.45.67/3210.35.45.67 – 10.35.45.6710.35.45.67
6910.35.45.68/3210.35.45.68 – 10.35.45.6810.35.45.68
7010.35.45.69/3210.35.45.69 – 10.35.45.6910.35.45.69
7110.35.45.70/3210.35.45.70 – 10.35.45.7010.35.45.70
7210.35.45.71/3210.35.45.71 – 10.35.45.7110.35.45.71
7310.35.45.72/3210.35.45.72 – 10.35.45.7210.35.45.72
7410.35.45.73/3210.35.45.73 – 10.35.45.7310.35.45.73
7510.35.45.74/3210.35.45.74 – 10.35.45.7410.35.45.74
7610.35.45.75/3210.35.45.75 – 10.35.45.7510.35.45.75
7710.35.45.76/3210.35.45.76 – 10.35.45.7610.35.45.76
7810.35.45.77/3210.35.45.77 – 10.35.45.7710.35.45.77
7910.35.45.78/3210.35.45.78 – 10.35.45.7810.35.45.78
8010.35.45.79/3210.35.45.79 – 10.35.45.7910.35.45.79
8110.35.45.80/3210.35.45.80 – 10.35.45.8010.35.45.80
8210.35.45.81/3210.35.45.81 – 10.35.45.8110.35.45.81
8310.35.45.82/3210.35.45.82 – 10.35.45.8210.35.45.82
8410.35.45.83/3210.35.45.83 – 10.35.45.8310.35.45.83
8510.35.45.84/3210.35.45.84 – 10.35.45.8410.35.45.84
8610.35.45.85/3210.35.45.85 – 10.35.45.8510.35.45.85
8710.35.45.86/3210.35.45.86 – 10.35.45.8610.35.45.86
8810.35.45.87/3210.35.45.87 – 10.35.45.8710.35.45.87
8910.35.45.88/3210.35.45.88 – 10.35.45.8810.35.45.88
9010.35.45.89/3210.35.45.89 – 10.35.45.8910.35.45.89
9110.35.45.90/3210.35.45.90 – 10.35.45.9010.35.45.90
9210.35.45.91/3210.35.45.91 – 10.35.45.9110.35.45.91
9310.35.45.92/3210.35.45.92 – 10.35.45.9210.35.45.92
9410.35.45.93/3210.35.45.93 – 10.35.45.9310.35.45.93
9510.35.45.94/3210.35.45.94 – 10.35.45.9410.35.45.94
9610.35.45.95/3210.35.45.95 – 10.35.45.9510.35.45.95
9710.35.45.96/3210.35.45.96 – 10.35.45.9610.35.45.96
9810.35.45.97/3210.35.45.97 – 10.35.45.9710.35.45.97
9910.35.45.98/3210.35.45.98 – 10.35.45.9810.35.45.98
10010.35.45.99/3210.35.45.99 – 10.35.45.9910.35.45.99
10110.35.45.100/3210.35.45.100 – 10.35.45.10010.35.45.100
10210.35.45.101/3210.35.45.101 – 10.35.45.10110.35.45.101
10310.35.45.102/3210.35.45.102 – 10.35.45.10210.35.45.102
10410.35.45.103/3210.35.45.103 – 10.35.45.10310.35.45.103
10510.35.45.104/3210.35.45.104 – 10.35.45.10410.35.45.104
10610.35.45.105/3210.35.45.105 – 10.35.45.10510.35.45.105
10710.35.45.106/3210.35.45.106 – 10.35.45.10610.35.45.106
10810.35.45.107/3210.35.45.107 – 10.35.45.10710.35.45.107
10910.35.45.108/3210.35.45.108 – 10.35.45.10810.35.45.108
11010.35.45.109/3210.35.45.109 – 10.35.45.10910.35.45.109
11110.35.45.110/3210.35.45.110 – 10.35.45.11010.35.45.110
11210.35.45.111/3210.35.45.111 – 10.35.45.11110.35.45.111
11310.35.45.112/3210.35.45.112 – 10.35.45.11210.35.45.112
11410.35.45.113/3210.35.45.113 – 10.35.45.11310.35.45.113
11510.35.45.114/3210.35.45.114 – 10.35.45.11410.35.45.114
11610.35.45.115/3210.35.45.115 – 10.35.45.11510.35.45.115
11710.35.45.116/3210.35.45.116 – 10.35.45.11610.35.45.116
11810.35.45.117/3210.35.45.117 – 10.35.45.11710.35.45.117
11910.35.45.118/3210.35.45.118 – 10.35.45.11810.35.45.118
12010.35.45.119/3210.35.45.119 – 10.35.45.11910.35.45.119
12110.35.45.120/3210.35.45.120 – 10.35.45.12010.35.45.120
12210.35.45.121/3210.35.45.121 – 10.35.45.12110.35.45.121
12310.35.45.122/3210.35.45.122 – 10.35.45.12210.35.45.122
12410.35.45.123/3210.35.45.123 – 10.35.45.12310.35.45.123
12510.35.45.124/3210.35.45.124 – 10.35.45.12410.35.45.124
12610.35.45.125/3210.35.45.125 – 10.35.45.12510.35.45.125
12710.35.45.126/3210.35.45.126 – 10.35.45.12610.35.45.126
12810.35.45.127/3210.35.45.127 – 10.35.45.12710.35.45.127
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 →