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)10.185.68.0/22

network10.185.68.0/22

broadcast10.185.71.255

first host10.185.68.1

last host10.185.71.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.185.68.0/22

address00001010.10111001.01000100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10111001.01000100.00000000

broadcast00001010.10111001.01000111.11111111

green = network part, grey = host part

hex0x0ab94400

decimal179913728

reverse dns0.68.185.10.in-addr.arpa

ipv4-mapped::ffff:ab9:4400

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.185.68.0/28	10.185.68.1 – 10.185.68.14	10.185.68.15
2	10.185.68.16/28	10.185.68.17 – 10.185.68.30	10.185.68.31
3	10.185.68.32/28	10.185.68.33 – 10.185.68.46	10.185.68.47
4	10.185.68.48/28	10.185.68.49 – 10.185.68.62	10.185.68.63
5	10.185.68.64/28	10.185.68.65 – 10.185.68.78	10.185.68.79
6	10.185.68.80/28	10.185.68.81 – 10.185.68.94	10.185.68.95
7	10.185.68.96/28	10.185.68.97 – 10.185.68.110	10.185.68.111
8	10.185.68.112/28	10.185.68.113 – 10.185.68.126	10.185.68.127
9	10.185.68.128/28	10.185.68.129 – 10.185.68.142	10.185.68.143
10	10.185.68.144/28	10.185.68.145 – 10.185.68.158	10.185.68.159
11	10.185.68.160/28	10.185.68.161 – 10.185.68.174	10.185.68.175
12	10.185.68.176/28	10.185.68.177 – 10.185.68.190	10.185.68.191
13	10.185.68.192/28	10.185.68.193 – 10.185.68.206	10.185.68.207
14	10.185.68.208/28	10.185.68.209 – 10.185.68.222	10.185.68.223
15	10.185.68.224/28	10.185.68.225 – 10.185.68.238	10.185.68.239
16	10.185.68.240/28	10.185.68.241 – 10.185.68.254	10.185.68.255
17	10.185.69.0/28	10.185.69.1 – 10.185.69.14	10.185.69.15
18	10.185.69.16/28	10.185.69.17 – 10.185.69.30	10.185.69.31
19	10.185.69.32/28	10.185.69.33 – 10.185.69.46	10.185.69.47
20	10.185.69.48/28	10.185.69.49 – 10.185.69.62	10.185.69.63
21	10.185.69.64/28	10.185.69.65 – 10.185.69.78	10.185.69.79
22	10.185.69.80/28	10.185.69.81 – 10.185.69.94	10.185.69.95
23	10.185.69.96/28	10.185.69.97 – 10.185.69.110	10.185.69.111
24	10.185.69.112/28	10.185.69.113 – 10.185.69.126	10.185.69.127
25	10.185.69.128/28	10.185.69.129 – 10.185.69.142	10.185.69.143
26	10.185.69.144/28	10.185.69.145 – 10.185.69.158	10.185.69.159
27	10.185.69.160/28	10.185.69.161 – 10.185.69.174	10.185.69.175
28	10.185.69.176/28	10.185.69.177 – 10.185.69.190	10.185.69.191
29	10.185.69.192/28	10.185.69.193 – 10.185.69.206	10.185.69.207
30	10.185.69.208/28	10.185.69.209 – 10.185.69.222	10.185.69.223
31	10.185.69.224/28	10.185.69.225 – 10.185.69.238	10.185.69.239
32	10.185.69.240/28	10.185.69.241 – 10.185.69.254	10.185.69.255
33	10.185.70.0/28	10.185.70.1 – 10.185.70.14	10.185.70.15
34	10.185.70.16/28	10.185.70.17 – 10.185.70.30	10.185.70.31
35	10.185.70.32/28	10.185.70.33 – 10.185.70.46	10.185.70.47
36	10.185.70.48/28	10.185.70.49 – 10.185.70.62	10.185.70.63
37	10.185.70.64/28	10.185.70.65 – 10.185.70.78	10.185.70.79
38	10.185.70.80/28	10.185.70.81 – 10.185.70.94	10.185.70.95
39	10.185.70.96/28	10.185.70.97 – 10.185.70.110	10.185.70.111
40	10.185.70.112/28	10.185.70.113 – 10.185.70.126	10.185.70.127
41	10.185.70.128/28	10.185.70.129 – 10.185.70.142	10.185.70.143
42	10.185.70.144/28	10.185.70.145 – 10.185.70.158	10.185.70.159
43	10.185.70.160/28	10.185.70.161 – 10.185.70.174	10.185.70.175
44	10.185.70.176/28	10.185.70.177 – 10.185.70.190	10.185.70.191
45	10.185.70.192/28	10.185.70.193 – 10.185.70.206	10.185.70.207
46	10.185.70.208/28	10.185.70.209 – 10.185.70.222	10.185.70.223
47	10.185.70.224/28	10.185.70.225 – 10.185.70.238	10.185.70.239
48	10.185.70.240/28	10.185.70.241 – 10.185.70.254	10.185.70.255
49	10.185.71.0/28	10.185.71.1 – 10.185.71.14	10.185.71.15
50	10.185.71.16/28	10.185.71.17 – 10.185.71.30	10.185.71.31
51	10.185.71.32/28	10.185.71.33 – 10.185.71.46	10.185.71.47
52	10.185.71.48/28	10.185.71.49 – 10.185.71.62	10.185.71.63
53	10.185.71.64/28	10.185.71.65 – 10.185.71.78	10.185.71.79
54	10.185.71.80/28	10.185.71.81 – 10.185.71.94	10.185.71.95
55	10.185.71.96/28	10.185.71.97 – 10.185.71.110	10.185.71.111
56	10.185.71.112/28	10.185.71.113 – 10.185.71.126	10.185.71.127
57	10.185.71.128/28	10.185.71.129 – 10.185.71.142	10.185.71.143
58	10.185.71.144/28	10.185.71.145 – 10.185.71.158	10.185.71.159
59	10.185.71.160/28	10.185.71.161 – 10.185.71.174	10.185.71.175
60	10.185.71.176/28	10.185.71.177 – 10.185.71.190	10.185.71.191
61	10.185.71.192/28	10.185.71.193 – 10.185.71.206	10.185.71.207
62	10.185.71.208/28	10.185.71.209 – 10.185.71.222	10.185.71.223
63	10.185.71.224/28	10.185.71.225 – 10.185.71.238	10.185.71.239
64	10.185.71.240/28	10.185.71.241 – 10.185.71.254	10.185.71.255

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 →