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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)10.131.46.0/25
network10.131.46.0/25
broadcast10.131.46.127
first host10.131.46.1
last host10.131.46.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.131.46.0/25
address00001010.10000011.00101110.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10000011.00101110.00000000
broadcast00001010.10000011.00101110.01111111
green = network part, grey = host part
hex0x0a832e00
decimal176369152
reverse dns0.46.131.10.in-addr.arpa
ipv4-mapped::ffff:a83:2e00

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.131.46.0/3110.131.46.0 – 10.131.46.110.131.46.1
210.131.46.2/3110.131.46.2 – 10.131.46.310.131.46.3
310.131.46.4/3110.131.46.4 – 10.131.46.510.131.46.5
410.131.46.6/3110.131.46.6 – 10.131.46.710.131.46.7
510.131.46.8/3110.131.46.8 – 10.131.46.910.131.46.9
610.131.46.10/3110.131.46.10 – 10.131.46.1110.131.46.11
710.131.46.12/3110.131.46.12 – 10.131.46.1310.131.46.13
810.131.46.14/3110.131.46.14 – 10.131.46.1510.131.46.15
910.131.46.16/3110.131.46.16 – 10.131.46.1710.131.46.17
1010.131.46.18/3110.131.46.18 – 10.131.46.1910.131.46.19
1110.131.46.20/3110.131.46.20 – 10.131.46.2110.131.46.21
1210.131.46.22/3110.131.46.22 – 10.131.46.2310.131.46.23
1310.131.46.24/3110.131.46.24 – 10.131.46.2510.131.46.25
1410.131.46.26/3110.131.46.26 – 10.131.46.2710.131.46.27
1510.131.46.28/3110.131.46.28 – 10.131.46.2910.131.46.29
1610.131.46.30/3110.131.46.30 – 10.131.46.3110.131.46.31
1710.131.46.32/3110.131.46.32 – 10.131.46.3310.131.46.33
1810.131.46.34/3110.131.46.34 – 10.131.46.3510.131.46.35
1910.131.46.36/3110.131.46.36 – 10.131.46.3710.131.46.37
2010.131.46.38/3110.131.46.38 – 10.131.46.3910.131.46.39
2110.131.46.40/3110.131.46.40 – 10.131.46.4110.131.46.41
2210.131.46.42/3110.131.46.42 – 10.131.46.4310.131.46.43
2310.131.46.44/3110.131.46.44 – 10.131.46.4510.131.46.45
2410.131.46.46/3110.131.46.46 – 10.131.46.4710.131.46.47
2510.131.46.48/3110.131.46.48 – 10.131.46.4910.131.46.49
2610.131.46.50/3110.131.46.50 – 10.131.46.5110.131.46.51
2710.131.46.52/3110.131.46.52 – 10.131.46.5310.131.46.53
2810.131.46.54/3110.131.46.54 – 10.131.46.5510.131.46.55
2910.131.46.56/3110.131.46.56 – 10.131.46.5710.131.46.57
3010.131.46.58/3110.131.46.58 – 10.131.46.5910.131.46.59
3110.131.46.60/3110.131.46.60 – 10.131.46.6110.131.46.61
3210.131.46.62/3110.131.46.62 – 10.131.46.6310.131.46.63
3310.131.46.64/3110.131.46.64 – 10.131.46.6510.131.46.65
3410.131.46.66/3110.131.46.66 – 10.131.46.6710.131.46.67
3510.131.46.68/3110.131.46.68 – 10.131.46.6910.131.46.69
3610.131.46.70/3110.131.46.70 – 10.131.46.7110.131.46.71
3710.131.46.72/3110.131.46.72 – 10.131.46.7310.131.46.73
3810.131.46.74/3110.131.46.74 – 10.131.46.7510.131.46.75
3910.131.46.76/3110.131.46.76 – 10.131.46.7710.131.46.77
4010.131.46.78/3110.131.46.78 – 10.131.46.7910.131.46.79
4110.131.46.80/3110.131.46.80 – 10.131.46.8110.131.46.81
4210.131.46.82/3110.131.46.82 – 10.131.46.8310.131.46.83
4310.131.46.84/3110.131.46.84 – 10.131.46.8510.131.46.85
4410.131.46.86/3110.131.46.86 – 10.131.46.8710.131.46.87
4510.131.46.88/3110.131.46.88 – 10.131.46.8910.131.46.89
4610.131.46.90/3110.131.46.90 – 10.131.46.9110.131.46.91
4710.131.46.92/3110.131.46.92 – 10.131.46.9310.131.46.93
4810.131.46.94/3110.131.46.94 – 10.131.46.9510.131.46.95
4910.131.46.96/3110.131.46.96 – 10.131.46.9710.131.46.97
5010.131.46.98/3110.131.46.98 – 10.131.46.9910.131.46.99
5110.131.46.100/3110.131.46.100 – 10.131.46.10110.131.46.101
5210.131.46.102/3110.131.46.102 – 10.131.46.10310.131.46.103
5310.131.46.104/3110.131.46.104 – 10.131.46.10510.131.46.105
5410.131.46.106/3110.131.46.106 – 10.131.46.10710.131.46.107
5510.131.46.108/3110.131.46.108 – 10.131.46.10910.131.46.109
5610.131.46.110/3110.131.46.110 – 10.131.46.11110.131.46.111
5710.131.46.112/3110.131.46.112 – 10.131.46.11310.131.46.113
5810.131.46.114/3110.131.46.114 – 10.131.46.11510.131.46.115
5910.131.46.116/3110.131.46.116 – 10.131.46.11710.131.46.117
6010.131.46.118/3110.131.46.118 – 10.131.46.11910.131.46.119
6110.131.46.120/3110.131.46.120 – 10.131.46.12110.131.46.121
6210.131.46.122/3110.131.46.122 – 10.131.46.12310.131.46.123
6310.131.46.124/3110.131.46.124 – 10.131.46.12510.131.46.125
6410.131.46.126/3110.131.46.126 – 10.131.46.12710.131.46.127
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 →