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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)10.76.46.0/25
network10.76.46.0/25
broadcast10.76.46.127
first host10.76.46.1
last host10.76.46.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.76.46.0/25
address00001010.01001100.00101110.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001100.00101110.00000000
broadcast00001010.01001100.00101110.01111111
green = network part, grey = host part
hex0x0a4c2e00
decimal172764672
reverse dns0.46.76.10.in-addr.arpa
ipv4-mapped::ffff:a4c:2e00

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.76.46.0/3110.76.46.0 – 10.76.46.110.76.46.1
210.76.46.2/3110.76.46.2 – 10.76.46.310.76.46.3
310.76.46.4/3110.76.46.4 – 10.76.46.510.76.46.5
410.76.46.6/3110.76.46.6 – 10.76.46.710.76.46.7
510.76.46.8/3110.76.46.8 – 10.76.46.910.76.46.9
610.76.46.10/3110.76.46.10 – 10.76.46.1110.76.46.11
710.76.46.12/3110.76.46.12 – 10.76.46.1310.76.46.13
810.76.46.14/3110.76.46.14 – 10.76.46.1510.76.46.15
910.76.46.16/3110.76.46.16 – 10.76.46.1710.76.46.17
1010.76.46.18/3110.76.46.18 – 10.76.46.1910.76.46.19
1110.76.46.20/3110.76.46.20 – 10.76.46.2110.76.46.21
1210.76.46.22/3110.76.46.22 – 10.76.46.2310.76.46.23
1310.76.46.24/3110.76.46.24 – 10.76.46.2510.76.46.25
1410.76.46.26/3110.76.46.26 – 10.76.46.2710.76.46.27
1510.76.46.28/3110.76.46.28 – 10.76.46.2910.76.46.29
1610.76.46.30/3110.76.46.30 – 10.76.46.3110.76.46.31
1710.76.46.32/3110.76.46.32 – 10.76.46.3310.76.46.33
1810.76.46.34/3110.76.46.34 – 10.76.46.3510.76.46.35
1910.76.46.36/3110.76.46.36 – 10.76.46.3710.76.46.37
2010.76.46.38/3110.76.46.38 – 10.76.46.3910.76.46.39
2110.76.46.40/3110.76.46.40 – 10.76.46.4110.76.46.41
2210.76.46.42/3110.76.46.42 – 10.76.46.4310.76.46.43
2310.76.46.44/3110.76.46.44 – 10.76.46.4510.76.46.45
2410.76.46.46/3110.76.46.46 – 10.76.46.4710.76.46.47
2510.76.46.48/3110.76.46.48 – 10.76.46.4910.76.46.49
2610.76.46.50/3110.76.46.50 – 10.76.46.5110.76.46.51
2710.76.46.52/3110.76.46.52 – 10.76.46.5310.76.46.53
2810.76.46.54/3110.76.46.54 – 10.76.46.5510.76.46.55
2910.76.46.56/3110.76.46.56 – 10.76.46.5710.76.46.57
3010.76.46.58/3110.76.46.58 – 10.76.46.5910.76.46.59
3110.76.46.60/3110.76.46.60 – 10.76.46.6110.76.46.61
3210.76.46.62/3110.76.46.62 – 10.76.46.6310.76.46.63
3310.76.46.64/3110.76.46.64 – 10.76.46.6510.76.46.65
3410.76.46.66/3110.76.46.66 – 10.76.46.6710.76.46.67
3510.76.46.68/3110.76.46.68 – 10.76.46.6910.76.46.69
3610.76.46.70/3110.76.46.70 – 10.76.46.7110.76.46.71
3710.76.46.72/3110.76.46.72 – 10.76.46.7310.76.46.73
3810.76.46.74/3110.76.46.74 – 10.76.46.7510.76.46.75
3910.76.46.76/3110.76.46.76 – 10.76.46.7710.76.46.77
4010.76.46.78/3110.76.46.78 – 10.76.46.7910.76.46.79
4110.76.46.80/3110.76.46.80 – 10.76.46.8110.76.46.81
4210.76.46.82/3110.76.46.82 – 10.76.46.8310.76.46.83
4310.76.46.84/3110.76.46.84 – 10.76.46.8510.76.46.85
4410.76.46.86/3110.76.46.86 – 10.76.46.8710.76.46.87
4510.76.46.88/3110.76.46.88 – 10.76.46.8910.76.46.89
4610.76.46.90/3110.76.46.90 – 10.76.46.9110.76.46.91
4710.76.46.92/3110.76.46.92 – 10.76.46.9310.76.46.93
4810.76.46.94/3110.76.46.94 – 10.76.46.9510.76.46.95
4910.76.46.96/3110.76.46.96 – 10.76.46.9710.76.46.97
5010.76.46.98/3110.76.46.98 – 10.76.46.9910.76.46.99
5110.76.46.100/3110.76.46.100 – 10.76.46.10110.76.46.101
5210.76.46.102/3110.76.46.102 – 10.76.46.10310.76.46.103
5310.76.46.104/3110.76.46.104 – 10.76.46.10510.76.46.105
5410.76.46.106/3110.76.46.106 – 10.76.46.10710.76.46.107
5510.76.46.108/3110.76.46.108 – 10.76.46.10910.76.46.109
5610.76.46.110/3110.76.46.110 – 10.76.46.11110.76.46.111
5710.76.46.112/3110.76.46.112 – 10.76.46.11310.76.46.113
5810.76.46.114/3110.76.46.114 – 10.76.46.11510.76.46.115
5910.76.46.116/3110.76.46.116 – 10.76.46.11710.76.46.117
6010.76.46.118/3110.76.46.118 – 10.76.46.11910.76.46.119
6110.76.46.120/3110.76.46.120 – 10.76.46.12110.76.46.121
6210.76.46.122/3110.76.46.122 – 10.76.46.12310.76.46.123
6310.76.46.124/3110.76.46.124 – 10.76.46.12510.76.46.125
6410.76.46.126/3110.76.46.126 – 10.76.46.12710.76.46.127
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 →