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)10.2.61.0/25
network10.2.61.0/25
broadcast10.2.61.127
first host10.2.61.1
last host10.2.61.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.61.0/25
address00001010.00000010.00111101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00111101.00000000
broadcast00001010.00000010.00111101.01111111
green = network part, grey = host part
hex0x0a023d00
decimal167918848
reverse dns0.61.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:3d00

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.61.0/3210.2.61.0 – 10.2.61.010.2.61.0
210.2.61.1/3210.2.61.1 – 10.2.61.110.2.61.1
310.2.61.2/3210.2.61.2 – 10.2.61.210.2.61.2
410.2.61.3/3210.2.61.3 – 10.2.61.310.2.61.3
510.2.61.4/3210.2.61.4 – 10.2.61.410.2.61.4
610.2.61.5/3210.2.61.5 – 10.2.61.510.2.61.5
710.2.61.6/3210.2.61.6 – 10.2.61.610.2.61.6
810.2.61.7/3210.2.61.7 – 10.2.61.710.2.61.7
910.2.61.8/3210.2.61.8 – 10.2.61.810.2.61.8
1010.2.61.9/3210.2.61.9 – 10.2.61.910.2.61.9
1110.2.61.10/3210.2.61.10 – 10.2.61.1010.2.61.10
1210.2.61.11/3210.2.61.11 – 10.2.61.1110.2.61.11
1310.2.61.12/3210.2.61.12 – 10.2.61.1210.2.61.12
1410.2.61.13/3210.2.61.13 – 10.2.61.1310.2.61.13
1510.2.61.14/3210.2.61.14 – 10.2.61.1410.2.61.14
1610.2.61.15/3210.2.61.15 – 10.2.61.1510.2.61.15
1710.2.61.16/3210.2.61.16 – 10.2.61.1610.2.61.16
1810.2.61.17/3210.2.61.17 – 10.2.61.1710.2.61.17
1910.2.61.18/3210.2.61.18 – 10.2.61.1810.2.61.18
2010.2.61.19/3210.2.61.19 – 10.2.61.1910.2.61.19
2110.2.61.20/3210.2.61.20 – 10.2.61.2010.2.61.20
2210.2.61.21/3210.2.61.21 – 10.2.61.2110.2.61.21
2310.2.61.22/3210.2.61.22 – 10.2.61.2210.2.61.22
2410.2.61.23/3210.2.61.23 – 10.2.61.2310.2.61.23
2510.2.61.24/3210.2.61.24 – 10.2.61.2410.2.61.24
2610.2.61.25/3210.2.61.25 – 10.2.61.2510.2.61.25
2710.2.61.26/3210.2.61.26 – 10.2.61.2610.2.61.26
2810.2.61.27/3210.2.61.27 – 10.2.61.2710.2.61.27
2910.2.61.28/3210.2.61.28 – 10.2.61.2810.2.61.28
3010.2.61.29/3210.2.61.29 – 10.2.61.2910.2.61.29
3110.2.61.30/3210.2.61.30 – 10.2.61.3010.2.61.30
3210.2.61.31/3210.2.61.31 – 10.2.61.3110.2.61.31
3310.2.61.32/3210.2.61.32 – 10.2.61.3210.2.61.32
3410.2.61.33/3210.2.61.33 – 10.2.61.3310.2.61.33
3510.2.61.34/3210.2.61.34 – 10.2.61.3410.2.61.34
3610.2.61.35/3210.2.61.35 – 10.2.61.3510.2.61.35
3710.2.61.36/3210.2.61.36 – 10.2.61.3610.2.61.36
3810.2.61.37/3210.2.61.37 – 10.2.61.3710.2.61.37
3910.2.61.38/3210.2.61.38 – 10.2.61.3810.2.61.38
4010.2.61.39/3210.2.61.39 – 10.2.61.3910.2.61.39
4110.2.61.40/3210.2.61.40 – 10.2.61.4010.2.61.40
4210.2.61.41/3210.2.61.41 – 10.2.61.4110.2.61.41
4310.2.61.42/3210.2.61.42 – 10.2.61.4210.2.61.42
4410.2.61.43/3210.2.61.43 – 10.2.61.4310.2.61.43
4510.2.61.44/3210.2.61.44 – 10.2.61.4410.2.61.44
4610.2.61.45/3210.2.61.45 – 10.2.61.4510.2.61.45
4710.2.61.46/3210.2.61.46 – 10.2.61.4610.2.61.46
4810.2.61.47/3210.2.61.47 – 10.2.61.4710.2.61.47
4910.2.61.48/3210.2.61.48 – 10.2.61.4810.2.61.48
5010.2.61.49/3210.2.61.49 – 10.2.61.4910.2.61.49
5110.2.61.50/3210.2.61.50 – 10.2.61.5010.2.61.50
5210.2.61.51/3210.2.61.51 – 10.2.61.5110.2.61.51
5310.2.61.52/3210.2.61.52 – 10.2.61.5210.2.61.52
5410.2.61.53/3210.2.61.53 – 10.2.61.5310.2.61.53
5510.2.61.54/3210.2.61.54 – 10.2.61.5410.2.61.54
5610.2.61.55/3210.2.61.55 – 10.2.61.5510.2.61.55
5710.2.61.56/3210.2.61.56 – 10.2.61.5610.2.61.56
5810.2.61.57/3210.2.61.57 – 10.2.61.5710.2.61.57
5910.2.61.58/3210.2.61.58 – 10.2.61.5810.2.61.58
6010.2.61.59/3210.2.61.59 – 10.2.61.5910.2.61.59
6110.2.61.60/3210.2.61.60 – 10.2.61.6010.2.61.60
6210.2.61.61/3210.2.61.61 – 10.2.61.6110.2.61.61
6310.2.61.62/3210.2.61.62 – 10.2.61.6210.2.61.62
6410.2.61.63/3210.2.61.63 – 10.2.61.6310.2.61.63
6510.2.61.64/3210.2.61.64 – 10.2.61.6410.2.61.64
6610.2.61.65/3210.2.61.65 – 10.2.61.6510.2.61.65
6710.2.61.66/3210.2.61.66 – 10.2.61.6610.2.61.66
6810.2.61.67/3210.2.61.67 – 10.2.61.6710.2.61.67
6910.2.61.68/3210.2.61.68 – 10.2.61.6810.2.61.68
7010.2.61.69/3210.2.61.69 – 10.2.61.6910.2.61.69
7110.2.61.70/3210.2.61.70 – 10.2.61.7010.2.61.70
7210.2.61.71/3210.2.61.71 – 10.2.61.7110.2.61.71
7310.2.61.72/3210.2.61.72 – 10.2.61.7210.2.61.72
7410.2.61.73/3210.2.61.73 – 10.2.61.7310.2.61.73
7510.2.61.74/3210.2.61.74 – 10.2.61.7410.2.61.74
7610.2.61.75/3210.2.61.75 – 10.2.61.7510.2.61.75
7710.2.61.76/3210.2.61.76 – 10.2.61.7610.2.61.76
7810.2.61.77/3210.2.61.77 – 10.2.61.7710.2.61.77
7910.2.61.78/3210.2.61.78 – 10.2.61.7810.2.61.78
8010.2.61.79/3210.2.61.79 – 10.2.61.7910.2.61.79
8110.2.61.80/3210.2.61.80 – 10.2.61.8010.2.61.80
8210.2.61.81/3210.2.61.81 – 10.2.61.8110.2.61.81
8310.2.61.82/3210.2.61.82 – 10.2.61.8210.2.61.82
8410.2.61.83/3210.2.61.83 – 10.2.61.8310.2.61.83
8510.2.61.84/3210.2.61.84 – 10.2.61.8410.2.61.84
8610.2.61.85/3210.2.61.85 – 10.2.61.8510.2.61.85
8710.2.61.86/3210.2.61.86 – 10.2.61.8610.2.61.86
8810.2.61.87/3210.2.61.87 – 10.2.61.8710.2.61.87
8910.2.61.88/3210.2.61.88 – 10.2.61.8810.2.61.88
9010.2.61.89/3210.2.61.89 – 10.2.61.8910.2.61.89
9110.2.61.90/3210.2.61.90 – 10.2.61.9010.2.61.90
9210.2.61.91/3210.2.61.91 – 10.2.61.9110.2.61.91
9310.2.61.92/3210.2.61.92 – 10.2.61.9210.2.61.92
9410.2.61.93/3210.2.61.93 – 10.2.61.9310.2.61.93
9510.2.61.94/3210.2.61.94 – 10.2.61.9410.2.61.94
9610.2.61.95/3210.2.61.95 – 10.2.61.9510.2.61.95
9710.2.61.96/3210.2.61.96 – 10.2.61.9610.2.61.96
9810.2.61.97/3210.2.61.97 – 10.2.61.9710.2.61.97
9910.2.61.98/3210.2.61.98 – 10.2.61.9810.2.61.98
10010.2.61.99/3210.2.61.99 – 10.2.61.9910.2.61.99
10110.2.61.100/3210.2.61.100 – 10.2.61.10010.2.61.100
10210.2.61.101/3210.2.61.101 – 10.2.61.10110.2.61.101
10310.2.61.102/3210.2.61.102 – 10.2.61.10210.2.61.102
10410.2.61.103/3210.2.61.103 – 10.2.61.10310.2.61.103
10510.2.61.104/3210.2.61.104 – 10.2.61.10410.2.61.104
10610.2.61.105/3210.2.61.105 – 10.2.61.10510.2.61.105
10710.2.61.106/3210.2.61.106 – 10.2.61.10610.2.61.106
10810.2.61.107/3210.2.61.107 – 10.2.61.10710.2.61.107
10910.2.61.108/3210.2.61.108 – 10.2.61.10810.2.61.108
11010.2.61.109/3210.2.61.109 – 10.2.61.10910.2.61.109
11110.2.61.110/3210.2.61.110 – 10.2.61.11010.2.61.110
11210.2.61.111/3210.2.61.111 – 10.2.61.11110.2.61.111
11310.2.61.112/3210.2.61.112 – 10.2.61.11210.2.61.112
11410.2.61.113/3210.2.61.113 – 10.2.61.11310.2.61.113
11510.2.61.114/3210.2.61.114 – 10.2.61.11410.2.61.114
11610.2.61.115/3210.2.61.115 – 10.2.61.11510.2.61.115
11710.2.61.116/3210.2.61.116 – 10.2.61.11610.2.61.116
11810.2.61.117/3210.2.61.117 – 10.2.61.11710.2.61.117
11910.2.61.118/3210.2.61.118 – 10.2.61.11810.2.61.118
12010.2.61.119/3210.2.61.119 – 10.2.61.11910.2.61.119
12110.2.61.120/3210.2.61.120 – 10.2.61.12010.2.61.120
12210.2.61.121/3210.2.61.121 – 10.2.61.12110.2.61.121
12310.2.61.122/3210.2.61.122 – 10.2.61.12210.2.61.122
12410.2.61.123/3210.2.61.123 – 10.2.61.12310.2.61.123
12510.2.61.124/3210.2.61.124 – 10.2.61.12410.2.61.124
12610.2.61.125/3210.2.61.125 – 10.2.61.12510.2.61.125
12710.2.61.126/3210.2.61.126 – 10.2.61.12610.2.61.126
12810.2.61.127/3210.2.61.127 – 10.2.61.12710.2.61.127
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 →