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)10.131.32.0/22

network10.131.32.0/22

broadcast10.131.35.255

first host10.131.32.1

last host10.131.35.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.131.32.0/22

address00001010.10000011.00100000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10000011.00100000.00000000

broadcast00001010.10000011.00100011.11111111

green = network part, grey = host part

hex0x0a832000

decimal176365568

reverse dns0.32.131.10.in-addr.arpa

ipv4-mapped::ffff:a83:2000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.131.32.0/28	10.131.32.1 – 10.131.32.14	10.131.32.15
2	10.131.32.16/28	10.131.32.17 – 10.131.32.30	10.131.32.31
3	10.131.32.32/28	10.131.32.33 – 10.131.32.46	10.131.32.47
4	10.131.32.48/28	10.131.32.49 – 10.131.32.62	10.131.32.63
5	10.131.32.64/28	10.131.32.65 – 10.131.32.78	10.131.32.79
6	10.131.32.80/28	10.131.32.81 – 10.131.32.94	10.131.32.95
7	10.131.32.96/28	10.131.32.97 – 10.131.32.110	10.131.32.111
8	10.131.32.112/28	10.131.32.113 – 10.131.32.126	10.131.32.127
9	10.131.32.128/28	10.131.32.129 – 10.131.32.142	10.131.32.143
10	10.131.32.144/28	10.131.32.145 – 10.131.32.158	10.131.32.159
11	10.131.32.160/28	10.131.32.161 – 10.131.32.174	10.131.32.175
12	10.131.32.176/28	10.131.32.177 – 10.131.32.190	10.131.32.191
13	10.131.32.192/28	10.131.32.193 – 10.131.32.206	10.131.32.207
14	10.131.32.208/28	10.131.32.209 – 10.131.32.222	10.131.32.223
15	10.131.32.224/28	10.131.32.225 – 10.131.32.238	10.131.32.239
16	10.131.32.240/28	10.131.32.241 – 10.131.32.254	10.131.32.255
17	10.131.33.0/28	10.131.33.1 – 10.131.33.14	10.131.33.15
18	10.131.33.16/28	10.131.33.17 – 10.131.33.30	10.131.33.31
19	10.131.33.32/28	10.131.33.33 – 10.131.33.46	10.131.33.47
20	10.131.33.48/28	10.131.33.49 – 10.131.33.62	10.131.33.63
21	10.131.33.64/28	10.131.33.65 – 10.131.33.78	10.131.33.79
22	10.131.33.80/28	10.131.33.81 – 10.131.33.94	10.131.33.95
23	10.131.33.96/28	10.131.33.97 – 10.131.33.110	10.131.33.111
24	10.131.33.112/28	10.131.33.113 – 10.131.33.126	10.131.33.127
25	10.131.33.128/28	10.131.33.129 – 10.131.33.142	10.131.33.143
26	10.131.33.144/28	10.131.33.145 – 10.131.33.158	10.131.33.159
27	10.131.33.160/28	10.131.33.161 – 10.131.33.174	10.131.33.175
28	10.131.33.176/28	10.131.33.177 – 10.131.33.190	10.131.33.191
29	10.131.33.192/28	10.131.33.193 – 10.131.33.206	10.131.33.207
30	10.131.33.208/28	10.131.33.209 – 10.131.33.222	10.131.33.223
31	10.131.33.224/28	10.131.33.225 – 10.131.33.238	10.131.33.239
32	10.131.33.240/28	10.131.33.241 – 10.131.33.254	10.131.33.255
33	10.131.34.0/28	10.131.34.1 – 10.131.34.14	10.131.34.15
34	10.131.34.16/28	10.131.34.17 – 10.131.34.30	10.131.34.31
35	10.131.34.32/28	10.131.34.33 – 10.131.34.46	10.131.34.47
36	10.131.34.48/28	10.131.34.49 – 10.131.34.62	10.131.34.63
37	10.131.34.64/28	10.131.34.65 – 10.131.34.78	10.131.34.79
38	10.131.34.80/28	10.131.34.81 – 10.131.34.94	10.131.34.95
39	10.131.34.96/28	10.131.34.97 – 10.131.34.110	10.131.34.111
40	10.131.34.112/28	10.131.34.113 – 10.131.34.126	10.131.34.127
41	10.131.34.128/28	10.131.34.129 – 10.131.34.142	10.131.34.143
42	10.131.34.144/28	10.131.34.145 – 10.131.34.158	10.131.34.159
43	10.131.34.160/28	10.131.34.161 – 10.131.34.174	10.131.34.175
44	10.131.34.176/28	10.131.34.177 – 10.131.34.190	10.131.34.191
45	10.131.34.192/28	10.131.34.193 – 10.131.34.206	10.131.34.207
46	10.131.34.208/28	10.131.34.209 – 10.131.34.222	10.131.34.223
47	10.131.34.224/28	10.131.34.225 – 10.131.34.238	10.131.34.239
48	10.131.34.240/28	10.131.34.241 – 10.131.34.254	10.131.34.255
49	10.131.35.0/28	10.131.35.1 – 10.131.35.14	10.131.35.15
50	10.131.35.16/28	10.131.35.17 – 10.131.35.30	10.131.35.31
51	10.131.35.32/28	10.131.35.33 – 10.131.35.46	10.131.35.47
52	10.131.35.48/28	10.131.35.49 – 10.131.35.62	10.131.35.63
53	10.131.35.64/28	10.131.35.65 – 10.131.35.78	10.131.35.79
54	10.131.35.80/28	10.131.35.81 – 10.131.35.94	10.131.35.95
55	10.131.35.96/28	10.131.35.97 – 10.131.35.110	10.131.35.111
56	10.131.35.112/28	10.131.35.113 – 10.131.35.126	10.131.35.127
57	10.131.35.128/28	10.131.35.129 – 10.131.35.142	10.131.35.143
58	10.131.35.144/28	10.131.35.145 – 10.131.35.158	10.131.35.159
59	10.131.35.160/28	10.131.35.161 – 10.131.35.174	10.131.35.175
60	10.131.35.176/28	10.131.35.177 – 10.131.35.190	10.131.35.191
61	10.131.35.192/28	10.131.35.193 – 10.131.35.206	10.131.35.207
62	10.131.35.208/28	10.131.35.209 – 10.131.35.222	10.131.35.223
63	10.131.35.224/28	10.131.35.225 – 10.131.35.238	10.131.35.239
64	10.131.35.240/28	10.131.35.241 – 10.131.35.254	10.131.35.255

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 →