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.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.3.168.0/22

network10.3.168.0/22

broadcast10.3.171.255

first host10.3.168.1

last host10.3.171.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.3.168.0/22

address00001010.00000011.10101000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000011.10101000.00000000

broadcast00001010.00000011.10101011.11111111

green = network part, grey = host part

hex0x0a03a800

decimal168011776

reverse dns0.168.3.10.in-addr.arpa

ipv4-mapped::ffff:a03:a800

/22 split into /27 · 32 subnets

close ×

#	network	host range	broadcast
1	10.3.168.0/27	10.3.168.1 – 10.3.168.30	10.3.168.31
2	10.3.168.32/27	10.3.168.33 – 10.3.168.62	10.3.168.63
3	10.3.168.64/27	10.3.168.65 – 10.3.168.94	10.3.168.95
4	10.3.168.96/27	10.3.168.97 – 10.3.168.126	10.3.168.127
5	10.3.168.128/27	10.3.168.129 – 10.3.168.158	10.3.168.159
6	10.3.168.160/27	10.3.168.161 – 10.3.168.190	10.3.168.191
7	10.3.168.192/27	10.3.168.193 – 10.3.168.222	10.3.168.223
8	10.3.168.224/27	10.3.168.225 – 10.3.168.254	10.3.168.255
9	10.3.169.0/27	10.3.169.1 – 10.3.169.30	10.3.169.31
10	10.3.169.32/27	10.3.169.33 – 10.3.169.62	10.3.169.63
11	10.3.169.64/27	10.3.169.65 – 10.3.169.94	10.3.169.95
12	10.3.169.96/27	10.3.169.97 – 10.3.169.126	10.3.169.127
13	10.3.169.128/27	10.3.169.129 – 10.3.169.158	10.3.169.159
14	10.3.169.160/27	10.3.169.161 – 10.3.169.190	10.3.169.191
15	10.3.169.192/27	10.3.169.193 – 10.3.169.222	10.3.169.223
16	10.3.169.224/27	10.3.169.225 – 10.3.169.254	10.3.169.255
17	10.3.170.0/27	10.3.170.1 – 10.3.170.30	10.3.170.31
18	10.3.170.32/27	10.3.170.33 – 10.3.170.62	10.3.170.63
19	10.3.170.64/27	10.3.170.65 – 10.3.170.94	10.3.170.95
20	10.3.170.96/27	10.3.170.97 – 10.3.170.126	10.3.170.127
21	10.3.170.128/27	10.3.170.129 – 10.3.170.158	10.3.170.159
22	10.3.170.160/27	10.3.170.161 – 10.3.170.190	10.3.170.191
23	10.3.170.192/27	10.3.170.193 – 10.3.170.222	10.3.170.223
24	10.3.170.224/27	10.3.170.225 – 10.3.170.254	10.3.170.255
25	10.3.171.0/27	10.3.171.1 – 10.3.171.30	10.3.171.31
26	10.3.171.32/27	10.3.171.33 – 10.3.171.62	10.3.171.63
27	10.3.171.64/27	10.3.171.65 – 10.3.171.94	10.3.171.95
28	10.3.171.96/27	10.3.171.97 – 10.3.171.126	10.3.171.127
29	10.3.171.128/27	10.3.171.129 – 10.3.171.158	10.3.171.159
30	10.3.171.160/27	10.3.171.161 – 10.3.171.190	10.3.171.191
31	10.3.171.192/27	10.3.171.193 – 10.3.171.222	10.3.171.223
32	10.3.171.224/27	10.3.171.225 – 10.3.171.254	10.3.171.255

01 / table

IPv4 CIDR prefix table.

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

prefix	subnet mask	addresses	hosts	in your /22
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 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 →