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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)10.41.85.0/26
network10.41.85.0/26
broadcast10.41.85.63
first host10.41.85.1
last host10.41.85.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.41.85.0/26
address00001010.00101001.01010101.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00101001.01010101.00000000
broadcast00001010.00101001.01010101.00111111
green = network part, grey = host part
hex0x0a295500
decimal170480896
reverse dns0.85.41.10.in-addr.arpa
ipv4-mapped::ffff:a29:5500

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.41.85.0/3210.41.85.0 – 10.41.85.010.41.85.0
210.41.85.1/3210.41.85.1 – 10.41.85.110.41.85.1
310.41.85.2/3210.41.85.2 – 10.41.85.210.41.85.2
410.41.85.3/3210.41.85.3 – 10.41.85.310.41.85.3
510.41.85.4/3210.41.85.4 – 10.41.85.410.41.85.4
610.41.85.5/3210.41.85.5 – 10.41.85.510.41.85.5
710.41.85.6/3210.41.85.6 – 10.41.85.610.41.85.6
810.41.85.7/3210.41.85.7 – 10.41.85.710.41.85.7
910.41.85.8/3210.41.85.8 – 10.41.85.810.41.85.8
1010.41.85.9/3210.41.85.9 – 10.41.85.910.41.85.9
1110.41.85.10/3210.41.85.10 – 10.41.85.1010.41.85.10
1210.41.85.11/3210.41.85.11 – 10.41.85.1110.41.85.11
1310.41.85.12/3210.41.85.12 – 10.41.85.1210.41.85.12
1410.41.85.13/3210.41.85.13 – 10.41.85.1310.41.85.13
1510.41.85.14/3210.41.85.14 – 10.41.85.1410.41.85.14
1610.41.85.15/3210.41.85.15 – 10.41.85.1510.41.85.15
1710.41.85.16/3210.41.85.16 – 10.41.85.1610.41.85.16
1810.41.85.17/3210.41.85.17 – 10.41.85.1710.41.85.17
1910.41.85.18/3210.41.85.18 – 10.41.85.1810.41.85.18
2010.41.85.19/3210.41.85.19 – 10.41.85.1910.41.85.19
2110.41.85.20/3210.41.85.20 – 10.41.85.2010.41.85.20
2210.41.85.21/3210.41.85.21 – 10.41.85.2110.41.85.21
2310.41.85.22/3210.41.85.22 – 10.41.85.2210.41.85.22
2410.41.85.23/3210.41.85.23 – 10.41.85.2310.41.85.23
2510.41.85.24/3210.41.85.24 – 10.41.85.2410.41.85.24
2610.41.85.25/3210.41.85.25 – 10.41.85.2510.41.85.25
2710.41.85.26/3210.41.85.26 – 10.41.85.2610.41.85.26
2810.41.85.27/3210.41.85.27 – 10.41.85.2710.41.85.27
2910.41.85.28/3210.41.85.28 – 10.41.85.2810.41.85.28
3010.41.85.29/3210.41.85.29 – 10.41.85.2910.41.85.29
3110.41.85.30/3210.41.85.30 – 10.41.85.3010.41.85.30
3210.41.85.31/3210.41.85.31 – 10.41.85.3110.41.85.31
3310.41.85.32/3210.41.85.32 – 10.41.85.3210.41.85.32
3410.41.85.33/3210.41.85.33 – 10.41.85.3310.41.85.33
3510.41.85.34/3210.41.85.34 – 10.41.85.3410.41.85.34
3610.41.85.35/3210.41.85.35 – 10.41.85.3510.41.85.35
3710.41.85.36/3210.41.85.36 – 10.41.85.3610.41.85.36
3810.41.85.37/3210.41.85.37 – 10.41.85.3710.41.85.37
3910.41.85.38/3210.41.85.38 – 10.41.85.3810.41.85.38
4010.41.85.39/3210.41.85.39 – 10.41.85.3910.41.85.39
4110.41.85.40/3210.41.85.40 – 10.41.85.4010.41.85.40
4210.41.85.41/3210.41.85.41 – 10.41.85.4110.41.85.41
4310.41.85.42/3210.41.85.42 – 10.41.85.4210.41.85.42
4410.41.85.43/3210.41.85.43 – 10.41.85.4310.41.85.43
4510.41.85.44/3210.41.85.44 – 10.41.85.4410.41.85.44
4610.41.85.45/3210.41.85.45 – 10.41.85.4510.41.85.45
4710.41.85.46/3210.41.85.46 – 10.41.85.4610.41.85.46
4810.41.85.47/3210.41.85.47 – 10.41.85.4710.41.85.47
4910.41.85.48/3210.41.85.48 – 10.41.85.4810.41.85.48
5010.41.85.49/3210.41.85.49 – 10.41.85.4910.41.85.49
5110.41.85.50/3210.41.85.50 – 10.41.85.5010.41.85.50
5210.41.85.51/3210.41.85.51 – 10.41.85.5110.41.85.51
5310.41.85.52/3210.41.85.52 – 10.41.85.5210.41.85.52
5410.41.85.53/3210.41.85.53 – 10.41.85.5310.41.85.53
5510.41.85.54/3210.41.85.54 – 10.41.85.5410.41.85.54
5610.41.85.55/3210.41.85.55 – 10.41.85.5510.41.85.55
5710.41.85.56/3210.41.85.56 – 10.41.85.5610.41.85.56
5810.41.85.57/3210.41.85.57 – 10.41.85.5710.41.85.57
5910.41.85.58/3210.41.85.58 – 10.41.85.5810.41.85.58
6010.41.85.59/3210.41.85.59 – 10.41.85.5910.41.85.59
6110.41.85.60/3210.41.85.60 – 10.41.85.6010.41.85.60
6210.41.85.61/3210.41.85.61 – 10.41.85.6110.41.85.61
6310.41.85.62/3210.41.85.62 – 10.41.85.6210.41.85.62
6410.41.85.63/3210.41.85.63 – 10.41.85.6310.41.85.63
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /26
/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-
/25255.255.255.128128126-
/26255.255.255.19264621
/27255.255.255.22432302 split →
/28255.255.255.24016144 split →
/29255.255.255.248868 split →
/30255.255.255.2524216 split →
/31255.255.255.2542232 split →
/32255.255.255.2551164 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 →