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)10.45.253.0/25
network10.45.253.0/25
broadcast10.45.253.127
first host10.45.253.1
last host10.45.253.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.45.253.0/25
address00001010.00101101.11111101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00101101.11111101.00000000
broadcast00001010.00101101.11111101.01111111
green = network part, grey = host part
hex0x0a2dfd00
decimal170786048
reverse dns0.253.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:fd00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.45.253.0/3210.45.253.0 – 10.45.253.010.45.253.0
210.45.253.1/3210.45.253.1 – 10.45.253.110.45.253.1
310.45.253.2/3210.45.253.2 – 10.45.253.210.45.253.2
410.45.253.3/3210.45.253.3 – 10.45.253.310.45.253.3
510.45.253.4/3210.45.253.4 – 10.45.253.410.45.253.4
610.45.253.5/3210.45.253.5 – 10.45.253.510.45.253.5
710.45.253.6/3210.45.253.6 – 10.45.253.610.45.253.6
810.45.253.7/3210.45.253.7 – 10.45.253.710.45.253.7
910.45.253.8/3210.45.253.8 – 10.45.253.810.45.253.8
1010.45.253.9/3210.45.253.9 – 10.45.253.910.45.253.9
1110.45.253.10/3210.45.253.10 – 10.45.253.1010.45.253.10
1210.45.253.11/3210.45.253.11 – 10.45.253.1110.45.253.11
1310.45.253.12/3210.45.253.12 – 10.45.253.1210.45.253.12
1410.45.253.13/3210.45.253.13 – 10.45.253.1310.45.253.13
1510.45.253.14/3210.45.253.14 – 10.45.253.1410.45.253.14
1610.45.253.15/3210.45.253.15 – 10.45.253.1510.45.253.15
1710.45.253.16/3210.45.253.16 – 10.45.253.1610.45.253.16
1810.45.253.17/3210.45.253.17 – 10.45.253.1710.45.253.17
1910.45.253.18/3210.45.253.18 – 10.45.253.1810.45.253.18
2010.45.253.19/3210.45.253.19 – 10.45.253.1910.45.253.19
2110.45.253.20/3210.45.253.20 – 10.45.253.2010.45.253.20
2210.45.253.21/3210.45.253.21 – 10.45.253.2110.45.253.21
2310.45.253.22/3210.45.253.22 – 10.45.253.2210.45.253.22
2410.45.253.23/3210.45.253.23 – 10.45.253.2310.45.253.23
2510.45.253.24/3210.45.253.24 – 10.45.253.2410.45.253.24
2610.45.253.25/3210.45.253.25 – 10.45.253.2510.45.253.25
2710.45.253.26/3210.45.253.26 – 10.45.253.2610.45.253.26
2810.45.253.27/3210.45.253.27 – 10.45.253.2710.45.253.27
2910.45.253.28/3210.45.253.28 – 10.45.253.2810.45.253.28
3010.45.253.29/3210.45.253.29 – 10.45.253.2910.45.253.29
3110.45.253.30/3210.45.253.30 – 10.45.253.3010.45.253.30
3210.45.253.31/3210.45.253.31 – 10.45.253.3110.45.253.31
3310.45.253.32/3210.45.253.32 – 10.45.253.3210.45.253.32
3410.45.253.33/3210.45.253.33 – 10.45.253.3310.45.253.33
3510.45.253.34/3210.45.253.34 – 10.45.253.3410.45.253.34
3610.45.253.35/3210.45.253.35 – 10.45.253.3510.45.253.35
3710.45.253.36/3210.45.253.36 – 10.45.253.3610.45.253.36
3810.45.253.37/3210.45.253.37 – 10.45.253.3710.45.253.37
3910.45.253.38/3210.45.253.38 – 10.45.253.3810.45.253.38
4010.45.253.39/3210.45.253.39 – 10.45.253.3910.45.253.39
4110.45.253.40/3210.45.253.40 – 10.45.253.4010.45.253.40
4210.45.253.41/3210.45.253.41 – 10.45.253.4110.45.253.41
4310.45.253.42/3210.45.253.42 – 10.45.253.4210.45.253.42
4410.45.253.43/3210.45.253.43 – 10.45.253.4310.45.253.43
4510.45.253.44/3210.45.253.44 – 10.45.253.4410.45.253.44
4610.45.253.45/3210.45.253.45 – 10.45.253.4510.45.253.45
4710.45.253.46/3210.45.253.46 – 10.45.253.4610.45.253.46
4810.45.253.47/3210.45.253.47 – 10.45.253.4710.45.253.47
4910.45.253.48/3210.45.253.48 – 10.45.253.4810.45.253.48
5010.45.253.49/3210.45.253.49 – 10.45.253.4910.45.253.49
5110.45.253.50/3210.45.253.50 – 10.45.253.5010.45.253.50
5210.45.253.51/3210.45.253.51 – 10.45.253.5110.45.253.51
5310.45.253.52/3210.45.253.52 – 10.45.253.5210.45.253.52
5410.45.253.53/3210.45.253.53 – 10.45.253.5310.45.253.53
5510.45.253.54/3210.45.253.54 – 10.45.253.5410.45.253.54
5610.45.253.55/3210.45.253.55 – 10.45.253.5510.45.253.55
5710.45.253.56/3210.45.253.56 – 10.45.253.5610.45.253.56
5810.45.253.57/3210.45.253.57 – 10.45.253.5710.45.253.57
5910.45.253.58/3210.45.253.58 – 10.45.253.5810.45.253.58
6010.45.253.59/3210.45.253.59 – 10.45.253.5910.45.253.59
6110.45.253.60/3210.45.253.60 – 10.45.253.6010.45.253.60
6210.45.253.61/3210.45.253.61 – 10.45.253.6110.45.253.61
6310.45.253.62/3210.45.253.62 – 10.45.253.6210.45.253.62
6410.45.253.63/3210.45.253.63 – 10.45.253.6310.45.253.63
6510.45.253.64/3210.45.253.64 – 10.45.253.6410.45.253.64
6610.45.253.65/3210.45.253.65 – 10.45.253.6510.45.253.65
6710.45.253.66/3210.45.253.66 – 10.45.253.6610.45.253.66
6810.45.253.67/3210.45.253.67 – 10.45.253.6710.45.253.67
6910.45.253.68/3210.45.253.68 – 10.45.253.6810.45.253.68
7010.45.253.69/3210.45.253.69 – 10.45.253.6910.45.253.69
7110.45.253.70/3210.45.253.70 – 10.45.253.7010.45.253.70
7210.45.253.71/3210.45.253.71 – 10.45.253.7110.45.253.71
7310.45.253.72/3210.45.253.72 – 10.45.253.7210.45.253.72
7410.45.253.73/3210.45.253.73 – 10.45.253.7310.45.253.73
7510.45.253.74/3210.45.253.74 – 10.45.253.7410.45.253.74
7610.45.253.75/3210.45.253.75 – 10.45.253.7510.45.253.75
7710.45.253.76/3210.45.253.76 – 10.45.253.7610.45.253.76
7810.45.253.77/3210.45.253.77 – 10.45.253.7710.45.253.77
7910.45.253.78/3210.45.253.78 – 10.45.253.7810.45.253.78
8010.45.253.79/3210.45.253.79 – 10.45.253.7910.45.253.79
8110.45.253.80/3210.45.253.80 – 10.45.253.8010.45.253.80
8210.45.253.81/3210.45.253.81 – 10.45.253.8110.45.253.81
8310.45.253.82/3210.45.253.82 – 10.45.253.8210.45.253.82
8410.45.253.83/3210.45.253.83 – 10.45.253.8310.45.253.83
8510.45.253.84/3210.45.253.84 – 10.45.253.8410.45.253.84
8610.45.253.85/3210.45.253.85 – 10.45.253.8510.45.253.85
8710.45.253.86/3210.45.253.86 – 10.45.253.8610.45.253.86
8810.45.253.87/3210.45.253.87 – 10.45.253.8710.45.253.87
8910.45.253.88/3210.45.253.88 – 10.45.253.8810.45.253.88
9010.45.253.89/3210.45.253.89 – 10.45.253.8910.45.253.89
9110.45.253.90/3210.45.253.90 – 10.45.253.9010.45.253.90
9210.45.253.91/3210.45.253.91 – 10.45.253.9110.45.253.91
9310.45.253.92/3210.45.253.92 – 10.45.253.9210.45.253.92
9410.45.253.93/3210.45.253.93 – 10.45.253.9310.45.253.93
9510.45.253.94/3210.45.253.94 – 10.45.253.9410.45.253.94
9610.45.253.95/3210.45.253.95 – 10.45.253.9510.45.253.95
9710.45.253.96/3210.45.253.96 – 10.45.253.9610.45.253.96
9810.45.253.97/3210.45.253.97 – 10.45.253.9710.45.253.97
9910.45.253.98/3210.45.253.98 – 10.45.253.9810.45.253.98
10010.45.253.99/3210.45.253.99 – 10.45.253.9910.45.253.99
10110.45.253.100/3210.45.253.100 – 10.45.253.10010.45.253.100
10210.45.253.101/3210.45.253.101 – 10.45.253.10110.45.253.101
10310.45.253.102/3210.45.253.102 – 10.45.253.10210.45.253.102
10410.45.253.103/3210.45.253.103 – 10.45.253.10310.45.253.103
10510.45.253.104/3210.45.253.104 – 10.45.253.10410.45.253.104
10610.45.253.105/3210.45.253.105 – 10.45.253.10510.45.253.105
10710.45.253.106/3210.45.253.106 – 10.45.253.10610.45.253.106
10810.45.253.107/3210.45.253.107 – 10.45.253.10710.45.253.107
10910.45.253.108/3210.45.253.108 – 10.45.253.10810.45.253.108
11010.45.253.109/3210.45.253.109 – 10.45.253.10910.45.253.109
11110.45.253.110/3210.45.253.110 – 10.45.253.11010.45.253.110
11210.45.253.111/3210.45.253.111 – 10.45.253.11110.45.253.111
11310.45.253.112/3210.45.253.112 – 10.45.253.11210.45.253.112
11410.45.253.113/3210.45.253.113 – 10.45.253.11310.45.253.113
11510.45.253.114/3210.45.253.114 – 10.45.253.11410.45.253.114
11610.45.253.115/3210.45.253.115 – 10.45.253.11510.45.253.115
11710.45.253.116/3210.45.253.116 – 10.45.253.11610.45.253.116
11810.45.253.117/3210.45.253.117 – 10.45.253.11710.45.253.117
11910.45.253.118/3210.45.253.118 – 10.45.253.11810.45.253.118
12010.45.253.119/3210.45.253.119 – 10.45.253.11910.45.253.119
12110.45.253.120/3210.45.253.120 – 10.45.253.12010.45.253.120
12210.45.253.121/3210.45.253.121 – 10.45.253.12110.45.253.121
12310.45.253.122/3210.45.253.122 – 10.45.253.12210.45.253.122
12410.45.253.123/3210.45.253.123 – 10.45.253.12310.45.253.123
12510.45.253.124/3210.45.253.124 – 10.45.253.12410.45.253.124
12610.45.253.125/3210.45.253.125 – 10.45.253.12510.45.253.125
12710.45.253.126/3210.45.253.126 – 10.45.253.12610.45.253.126
12810.45.253.127/3210.45.253.127 – 10.45.253.12710.45.253.127
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 →