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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)10.2.53.0/25
network10.2.53.0/25
broadcast10.2.53.127
first host10.2.53.1
last host10.2.53.126
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.53.0/25
address00001010.00000010.00110101.00000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00110101.00000000
broadcast00001010.00000010.00110101.01111111
green = network part, grey = host part
hex0x0a023500
decimal167916800
reverse dns0.53.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:3500

/25 split into /31 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.53.0/3110.2.53.0 – 10.2.53.110.2.53.1
210.2.53.2/3110.2.53.2 – 10.2.53.310.2.53.3
310.2.53.4/3110.2.53.4 – 10.2.53.510.2.53.5
410.2.53.6/3110.2.53.6 – 10.2.53.710.2.53.7
510.2.53.8/3110.2.53.8 – 10.2.53.910.2.53.9
610.2.53.10/3110.2.53.10 – 10.2.53.1110.2.53.11
710.2.53.12/3110.2.53.12 – 10.2.53.1310.2.53.13
810.2.53.14/3110.2.53.14 – 10.2.53.1510.2.53.15
910.2.53.16/3110.2.53.16 – 10.2.53.1710.2.53.17
1010.2.53.18/3110.2.53.18 – 10.2.53.1910.2.53.19
1110.2.53.20/3110.2.53.20 – 10.2.53.2110.2.53.21
1210.2.53.22/3110.2.53.22 – 10.2.53.2310.2.53.23
1310.2.53.24/3110.2.53.24 – 10.2.53.2510.2.53.25
1410.2.53.26/3110.2.53.26 – 10.2.53.2710.2.53.27
1510.2.53.28/3110.2.53.28 – 10.2.53.2910.2.53.29
1610.2.53.30/3110.2.53.30 – 10.2.53.3110.2.53.31
1710.2.53.32/3110.2.53.32 – 10.2.53.3310.2.53.33
1810.2.53.34/3110.2.53.34 – 10.2.53.3510.2.53.35
1910.2.53.36/3110.2.53.36 – 10.2.53.3710.2.53.37
2010.2.53.38/3110.2.53.38 – 10.2.53.3910.2.53.39
2110.2.53.40/3110.2.53.40 – 10.2.53.4110.2.53.41
2210.2.53.42/3110.2.53.42 – 10.2.53.4310.2.53.43
2310.2.53.44/3110.2.53.44 – 10.2.53.4510.2.53.45
2410.2.53.46/3110.2.53.46 – 10.2.53.4710.2.53.47
2510.2.53.48/3110.2.53.48 – 10.2.53.4910.2.53.49
2610.2.53.50/3110.2.53.50 – 10.2.53.5110.2.53.51
2710.2.53.52/3110.2.53.52 – 10.2.53.5310.2.53.53
2810.2.53.54/3110.2.53.54 – 10.2.53.5510.2.53.55
2910.2.53.56/3110.2.53.56 – 10.2.53.5710.2.53.57
3010.2.53.58/3110.2.53.58 – 10.2.53.5910.2.53.59
3110.2.53.60/3110.2.53.60 – 10.2.53.6110.2.53.61
3210.2.53.62/3110.2.53.62 – 10.2.53.6310.2.53.63
3310.2.53.64/3110.2.53.64 – 10.2.53.6510.2.53.65
3410.2.53.66/3110.2.53.66 – 10.2.53.6710.2.53.67
3510.2.53.68/3110.2.53.68 – 10.2.53.6910.2.53.69
3610.2.53.70/3110.2.53.70 – 10.2.53.7110.2.53.71
3710.2.53.72/3110.2.53.72 – 10.2.53.7310.2.53.73
3810.2.53.74/3110.2.53.74 – 10.2.53.7510.2.53.75
3910.2.53.76/3110.2.53.76 – 10.2.53.7710.2.53.77
4010.2.53.78/3110.2.53.78 – 10.2.53.7910.2.53.79
4110.2.53.80/3110.2.53.80 – 10.2.53.8110.2.53.81
4210.2.53.82/3110.2.53.82 – 10.2.53.8310.2.53.83
4310.2.53.84/3110.2.53.84 – 10.2.53.8510.2.53.85
4410.2.53.86/3110.2.53.86 – 10.2.53.8710.2.53.87
4510.2.53.88/3110.2.53.88 – 10.2.53.8910.2.53.89
4610.2.53.90/3110.2.53.90 – 10.2.53.9110.2.53.91
4710.2.53.92/3110.2.53.92 – 10.2.53.9310.2.53.93
4810.2.53.94/3110.2.53.94 – 10.2.53.9510.2.53.95
4910.2.53.96/3110.2.53.96 – 10.2.53.9710.2.53.97
5010.2.53.98/3110.2.53.98 – 10.2.53.9910.2.53.99
5110.2.53.100/3110.2.53.100 – 10.2.53.10110.2.53.101
5210.2.53.102/3110.2.53.102 – 10.2.53.10310.2.53.103
5310.2.53.104/3110.2.53.104 – 10.2.53.10510.2.53.105
5410.2.53.106/3110.2.53.106 – 10.2.53.10710.2.53.107
5510.2.53.108/3110.2.53.108 – 10.2.53.10910.2.53.109
5610.2.53.110/3110.2.53.110 – 10.2.53.11110.2.53.111
5710.2.53.112/3110.2.53.112 – 10.2.53.11310.2.53.113
5810.2.53.114/3110.2.53.114 – 10.2.53.11510.2.53.115
5910.2.53.116/3110.2.53.116 – 10.2.53.11710.2.53.117
6010.2.53.118/3110.2.53.118 – 10.2.53.11910.2.53.119
6110.2.53.120/3110.2.53.120 – 10.2.53.12110.2.53.121
6210.2.53.122/3110.2.53.122 – 10.2.53.12310.2.53.123
6310.2.53.124/3110.2.53.124 – 10.2.53.12510.2.53.125
6410.2.53.126/3110.2.53.126 – 10.2.53.12710.2.53.127
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 →