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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)10.167.176.0/25
network10.167.176.0/25
broadcast10.167.176.127
first host10.167.176.1
last host10.167.176.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.176.0/25
address00001010.10100111.10110000.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.10110000.00000000
broadcast00001010.10100111.10110000.01111111
green = network part, grey = host part
hex0x0aa7b000
decimal178761728
reverse dns0.176.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:b000

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.176.0/3110.167.176.0 – 10.167.176.110.167.176.1
210.167.176.2/3110.167.176.2 – 10.167.176.310.167.176.3
310.167.176.4/3110.167.176.4 – 10.167.176.510.167.176.5
410.167.176.6/3110.167.176.6 – 10.167.176.710.167.176.7
510.167.176.8/3110.167.176.8 – 10.167.176.910.167.176.9
610.167.176.10/3110.167.176.10 – 10.167.176.1110.167.176.11
710.167.176.12/3110.167.176.12 – 10.167.176.1310.167.176.13
810.167.176.14/3110.167.176.14 – 10.167.176.1510.167.176.15
910.167.176.16/3110.167.176.16 – 10.167.176.1710.167.176.17
1010.167.176.18/3110.167.176.18 – 10.167.176.1910.167.176.19
1110.167.176.20/3110.167.176.20 – 10.167.176.2110.167.176.21
1210.167.176.22/3110.167.176.22 – 10.167.176.2310.167.176.23
1310.167.176.24/3110.167.176.24 – 10.167.176.2510.167.176.25
1410.167.176.26/3110.167.176.26 – 10.167.176.2710.167.176.27
1510.167.176.28/3110.167.176.28 – 10.167.176.2910.167.176.29
1610.167.176.30/3110.167.176.30 – 10.167.176.3110.167.176.31
1710.167.176.32/3110.167.176.32 – 10.167.176.3310.167.176.33
1810.167.176.34/3110.167.176.34 – 10.167.176.3510.167.176.35
1910.167.176.36/3110.167.176.36 – 10.167.176.3710.167.176.37
2010.167.176.38/3110.167.176.38 – 10.167.176.3910.167.176.39
2110.167.176.40/3110.167.176.40 – 10.167.176.4110.167.176.41
2210.167.176.42/3110.167.176.42 – 10.167.176.4310.167.176.43
2310.167.176.44/3110.167.176.44 – 10.167.176.4510.167.176.45
2410.167.176.46/3110.167.176.46 – 10.167.176.4710.167.176.47
2510.167.176.48/3110.167.176.48 – 10.167.176.4910.167.176.49
2610.167.176.50/3110.167.176.50 – 10.167.176.5110.167.176.51
2710.167.176.52/3110.167.176.52 – 10.167.176.5310.167.176.53
2810.167.176.54/3110.167.176.54 – 10.167.176.5510.167.176.55
2910.167.176.56/3110.167.176.56 – 10.167.176.5710.167.176.57
3010.167.176.58/3110.167.176.58 – 10.167.176.5910.167.176.59
3110.167.176.60/3110.167.176.60 – 10.167.176.6110.167.176.61
3210.167.176.62/3110.167.176.62 – 10.167.176.6310.167.176.63
3310.167.176.64/3110.167.176.64 – 10.167.176.6510.167.176.65
3410.167.176.66/3110.167.176.66 – 10.167.176.6710.167.176.67
3510.167.176.68/3110.167.176.68 – 10.167.176.6910.167.176.69
3610.167.176.70/3110.167.176.70 – 10.167.176.7110.167.176.71
3710.167.176.72/3110.167.176.72 – 10.167.176.7310.167.176.73
3810.167.176.74/3110.167.176.74 – 10.167.176.7510.167.176.75
3910.167.176.76/3110.167.176.76 – 10.167.176.7710.167.176.77
4010.167.176.78/3110.167.176.78 – 10.167.176.7910.167.176.79
4110.167.176.80/3110.167.176.80 – 10.167.176.8110.167.176.81
4210.167.176.82/3110.167.176.82 – 10.167.176.8310.167.176.83
4310.167.176.84/3110.167.176.84 – 10.167.176.8510.167.176.85
4410.167.176.86/3110.167.176.86 – 10.167.176.8710.167.176.87
4510.167.176.88/3110.167.176.88 – 10.167.176.8910.167.176.89
4610.167.176.90/3110.167.176.90 – 10.167.176.9110.167.176.91
4710.167.176.92/3110.167.176.92 – 10.167.176.9310.167.176.93
4810.167.176.94/3110.167.176.94 – 10.167.176.9510.167.176.95
4910.167.176.96/3110.167.176.96 – 10.167.176.9710.167.176.97
5010.167.176.98/3110.167.176.98 – 10.167.176.9910.167.176.99
5110.167.176.100/3110.167.176.100 – 10.167.176.10110.167.176.101
5210.167.176.102/3110.167.176.102 – 10.167.176.10310.167.176.103
5310.167.176.104/3110.167.176.104 – 10.167.176.10510.167.176.105
5410.167.176.106/3110.167.176.106 – 10.167.176.10710.167.176.107
5510.167.176.108/3110.167.176.108 – 10.167.176.10910.167.176.109
5610.167.176.110/3110.167.176.110 – 10.167.176.11110.167.176.111
5710.167.176.112/3110.167.176.112 – 10.167.176.11310.167.176.113
5810.167.176.114/3110.167.176.114 – 10.167.176.11510.167.176.115
5910.167.176.116/3110.167.176.116 – 10.167.176.11710.167.176.117
6010.167.176.118/3110.167.176.118 – 10.167.176.11910.167.176.119
6110.167.176.120/3110.167.176.120 – 10.167.176.12110.167.176.121
6210.167.176.122/3110.167.176.122 – 10.167.176.12310.167.176.123
6310.167.176.124/3110.167.176.124 – 10.167.176.12510.167.176.125
6410.167.176.126/3110.167.176.126 – 10.167.176.12710.167.176.127
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 →