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)10.2.188.0/22

network10.2.188.0/22

broadcast10.2.191.255

first host10.2.188.1

last host10.2.191.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.188.0/22

address00001010.00000010.10111100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.10111100.00000000

broadcast00001010.00000010.10111111.11111111

green = network part, grey = host part

hex0x0a02bc00

decimal167951360

reverse dns0.188.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:bc00

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.2.188.0/28	10.2.188.1 – 10.2.188.14	10.2.188.15
2	10.2.188.16/28	10.2.188.17 – 10.2.188.30	10.2.188.31
3	10.2.188.32/28	10.2.188.33 – 10.2.188.46	10.2.188.47
4	10.2.188.48/28	10.2.188.49 – 10.2.188.62	10.2.188.63
5	10.2.188.64/28	10.2.188.65 – 10.2.188.78	10.2.188.79
6	10.2.188.80/28	10.2.188.81 – 10.2.188.94	10.2.188.95
7	10.2.188.96/28	10.2.188.97 – 10.2.188.110	10.2.188.111
8	10.2.188.112/28	10.2.188.113 – 10.2.188.126	10.2.188.127
9	10.2.188.128/28	10.2.188.129 – 10.2.188.142	10.2.188.143
10	10.2.188.144/28	10.2.188.145 – 10.2.188.158	10.2.188.159
11	10.2.188.160/28	10.2.188.161 – 10.2.188.174	10.2.188.175
12	10.2.188.176/28	10.2.188.177 – 10.2.188.190	10.2.188.191
13	10.2.188.192/28	10.2.188.193 – 10.2.188.206	10.2.188.207
14	10.2.188.208/28	10.2.188.209 – 10.2.188.222	10.2.188.223
15	10.2.188.224/28	10.2.188.225 – 10.2.188.238	10.2.188.239
16	10.2.188.240/28	10.2.188.241 – 10.2.188.254	10.2.188.255
17	10.2.189.0/28	10.2.189.1 – 10.2.189.14	10.2.189.15
18	10.2.189.16/28	10.2.189.17 – 10.2.189.30	10.2.189.31
19	10.2.189.32/28	10.2.189.33 – 10.2.189.46	10.2.189.47
20	10.2.189.48/28	10.2.189.49 – 10.2.189.62	10.2.189.63
21	10.2.189.64/28	10.2.189.65 – 10.2.189.78	10.2.189.79
22	10.2.189.80/28	10.2.189.81 – 10.2.189.94	10.2.189.95
23	10.2.189.96/28	10.2.189.97 – 10.2.189.110	10.2.189.111
24	10.2.189.112/28	10.2.189.113 – 10.2.189.126	10.2.189.127
25	10.2.189.128/28	10.2.189.129 – 10.2.189.142	10.2.189.143
26	10.2.189.144/28	10.2.189.145 – 10.2.189.158	10.2.189.159
27	10.2.189.160/28	10.2.189.161 – 10.2.189.174	10.2.189.175
28	10.2.189.176/28	10.2.189.177 – 10.2.189.190	10.2.189.191
29	10.2.189.192/28	10.2.189.193 – 10.2.189.206	10.2.189.207
30	10.2.189.208/28	10.2.189.209 – 10.2.189.222	10.2.189.223
31	10.2.189.224/28	10.2.189.225 – 10.2.189.238	10.2.189.239
32	10.2.189.240/28	10.2.189.241 – 10.2.189.254	10.2.189.255
33	10.2.190.0/28	10.2.190.1 – 10.2.190.14	10.2.190.15
34	10.2.190.16/28	10.2.190.17 – 10.2.190.30	10.2.190.31
35	10.2.190.32/28	10.2.190.33 – 10.2.190.46	10.2.190.47
36	10.2.190.48/28	10.2.190.49 – 10.2.190.62	10.2.190.63
37	10.2.190.64/28	10.2.190.65 – 10.2.190.78	10.2.190.79
38	10.2.190.80/28	10.2.190.81 – 10.2.190.94	10.2.190.95
39	10.2.190.96/28	10.2.190.97 – 10.2.190.110	10.2.190.111
40	10.2.190.112/28	10.2.190.113 – 10.2.190.126	10.2.190.127
41	10.2.190.128/28	10.2.190.129 – 10.2.190.142	10.2.190.143
42	10.2.190.144/28	10.2.190.145 – 10.2.190.158	10.2.190.159
43	10.2.190.160/28	10.2.190.161 – 10.2.190.174	10.2.190.175
44	10.2.190.176/28	10.2.190.177 – 10.2.190.190	10.2.190.191
45	10.2.190.192/28	10.2.190.193 – 10.2.190.206	10.2.190.207
46	10.2.190.208/28	10.2.190.209 – 10.2.190.222	10.2.190.223
47	10.2.190.224/28	10.2.190.225 – 10.2.190.238	10.2.190.239
48	10.2.190.240/28	10.2.190.241 – 10.2.190.254	10.2.190.255
49	10.2.191.0/28	10.2.191.1 – 10.2.191.14	10.2.191.15
50	10.2.191.16/28	10.2.191.17 – 10.2.191.30	10.2.191.31
51	10.2.191.32/28	10.2.191.33 – 10.2.191.46	10.2.191.47
52	10.2.191.48/28	10.2.191.49 – 10.2.191.62	10.2.191.63
53	10.2.191.64/28	10.2.191.65 – 10.2.191.78	10.2.191.79
54	10.2.191.80/28	10.2.191.81 – 10.2.191.94	10.2.191.95
55	10.2.191.96/28	10.2.191.97 – 10.2.191.110	10.2.191.111
56	10.2.191.112/28	10.2.191.113 – 10.2.191.126	10.2.191.127
57	10.2.191.128/28	10.2.191.129 – 10.2.191.142	10.2.191.143
58	10.2.191.144/28	10.2.191.145 – 10.2.191.158	10.2.191.159
59	10.2.191.160/28	10.2.191.161 – 10.2.191.174	10.2.191.175
60	10.2.191.176/28	10.2.191.177 – 10.2.191.190	10.2.191.191
61	10.2.191.192/28	10.2.191.193 – 10.2.191.206	10.2.191.207
62	10.2.191.208/28	10.2.191.209 – 10.2.191.222	10.2.191.223
63	10.2.191.224/28	10.2.191.225 – 10.2.191.238	10.2.191.239
64	10.2.191.240/28	10.2.191.241 – 10.2.191.254	10.2.191.255

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 →