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)10.167.80.0/22

network10.167.80.0/22

broadcast10.167.83.255

first host10.167.80.1

last host10.167.83.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.167.80.0/22

address00001010.10100111.01010000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10100111.01010000.00000000

broadcast00001010.10100111.01010011.11111111

green = network part, grey = host part

hex0x0aa75000

decimal178737152

reverse dns0.80.167.10.in-addr.arpa

ipv4-mapped::ffff:aa7:5000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.167.80.0/28	10.167.80.1 – 10.167.80.14	10.167.80.15
2	10.167.80.16/28	10.167.80.17 – 10.167.80.30	10.167.80.31
3	10.167.80.32/28	10.167.80.33 – 10.167.80.46	10.167.80.47
4	10.167.80.48/28	10.167.80.49 – 10.167.80.62	10.167.80.63
5	10.167.80.64/28	10.167.80.65 – 10.167.80.78	10.167.80.79
6	10.167.80.80/28	10.167.80.81 – 10.167.80.94	10.167.80.95
7	10.167.80.96/28	10.167.80.97 – 10.167.80.110	10.167.80.111
8	10.167.80.112/28	10.167.80.113 – 10.167.80.126	10.167.80.127
9	10.167.80.128/28	10.167.80.129 – 10.167.80.142	10.167.80.143
10	10.167.80.144/28	10.167.80.145 – 10.167.80.158	10.167.80.159
11	10.167.80.160/28	10.167.80.161 – 10.167.80.174	10.167.80.175
12	10.167.80.176/28	10.167.80.177 – 10.167.80.190	10.167.80.191
13	10.167.80.192/28	10.167.80.193 – 10.167.80.206	10.167.80.207
14	10.167.80.208/28	10.167.80.209 – 10.167.80.222	10.167.80.223
15	10.167.80.224/28	10.167.80.225 – 10.167.80.238	10.167.80.239
16	10.167.80.240/28	10.167.80.241 – 10.167.80.254	10.167.80.255
17	10.167.81.0/28	10.167.81.1 – 10.167.81.14	10.167.81.15
18	10.167.81.16/28	10.167.81.17 – 10.167.81.30	10.167.81.31
19	10.167.81.32/28	10.167.81.33 – 10.167.81.46	10.167.81.47
20	10.167.81.48/28	10.167.81.49 – 10.167.81.62	10.167.81.63
21	10.167.81.64/28	10.167.81.65 – 10.167.81.78	10.167.81.79
22	10.167.81.80/28	10.167.81.81 – 10.167.81.94	10.167.81.95
23	10.167.81.96/28	10.167.81.97 – 10.167.81.110	10.167.81.111
24	10.167.81.112/28	10.167.81.113 – 10.167.81.126	10.167.81.127
25	10.167.81.128/28	10.167.81.129 – 10.167.81.142	10.167.81.143
26	10.167.81.144/28	10.167.81.145 – 10.167.81.158	10.167.81.159
27	10.167.81.160/28	10.167.81.161 – 10.167.81.174	10.167.81.175
28	10.167.81.176/28	10.167.81.177 – 10.167.81.190	10.167.81.191
29	10.167.81.192/28	10.167.81.193 – 10.167.81.206	10.167.81.207
30	10.167.81.208/28	10.167.81.209 – 10.167.81.222	10.167.81.223
31	10.167.81.224/28	10.167.81.225 – 10.167.81.238	10.167.81.239
32	10.167.81.240/28	10.167.81.241 – 10.167.81.254	10.167.81.255
33	10.167.82.0/28	10.167.82.1 – 10.167.82.14	10.167.82.15
34	10.167.82.16/28	10.167.82.17 – 10.167.82.30	10.167.82.31
35	10.167.82.32/28	10.167.82.33 – 10.167.82.46	10.167.82.47
36	10.167.82.48/28	10.167.82.49 – 10.167.82.62	10.167.82.63
37	10.167.82.64/28	10.167.82.65 – 10.167.82.78	10.167.82.79
38	10.167.82.80/28	10.167.82.81 – 10.167.82.94	10.167.82.95
39	10.167.82.96/28	10.167.82.97 – 10.167.82.110	10.167.82.111
40	10.167.82.112/28	10.167.82.113 – 10.167.82.126	10.167.82.127
41	10.167.82.128/28	10.167.82.129 – 10.167.82.142	10.167.82.143
42	10.167.82.144/28	10.167.82.145 – 10.167.82.158	10.167.82.159
43	10.167.82.160/28	10.167.82.161 – 10.167.82.174	10.167.82.175
44	10.167.82.176/28	10.167.82.177 – 10.167.82.190	10.167.82.191
45	10.167.82.192/28	10.167.82.193 – 10.167.82.206	10.167.82.207
46	10.167.82.208/28	10.167.82.209 – 10.167.82.222	10.167.82.223
47	10.167.82.224/28	10.167.82.225 – 10.167.82.238	10.167.82.239
48	10.167.82.240/28	10.167.82.241 – 10.167.82.254	10.167.82.255
49	10.167.83.0/28	10.167.83.1 – 10.167.83.14	10.167.83.15
50	10.167.83.16/28	10.167.83.17 – 10.167.83.30	10.167.83.31
51	10.167.83.32/28	10.167.83.33 – 10.167.83.46	10.167.83.47
52	10.167.83.48/28	10.167.83.49 – 10.167.83.62	10.167.83.63
53	10.167.83.64/28	10.167.83.65 – 10.167.83.78	10.167.83.79
54	10.167.83.80/28	10.167.83.81 – 10.167.83.94	10.167.83.95
55	10.167.83.96/28	10.167.83.97 – 10.167.83.110	10.167.83.111
56	10.167.83.112/28	10.167.83.113 – 10.167.83.126	10.167.83.127
57	10.167.83.128/28	10.167.83.129 – 10.167.83.142	10.167.83.143
58	10.167.83.144/28	10.167.83.145 – 10.167.83.158	10.167.83.159
59	10.167.83.160/28	10.167.83.161 – 10.167.83.174	10.167.83.175
60	10.167.83.176/28	10.167.83.177 – 10.167.83.190	10.167.83.191
61	10.167.83.192/28	10.167.83.193 – 10.167.83.206	10.167.83.207
62	10.167.83.208/28	10.167.83.209 – 10.167.83.222	10.167.83.223
63	10.167.83.224/28	10.167.83.225 – 10.167.83.238	10.167.83.239
64	10.167.83.240/28	10.167.83.241 – 10.167.83.254	10.167.83.255

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 →