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)10.28.192.0/22

network10.28.192.0/22

broadcast10.28.195.255

first host10.28.192.1

last host10.28.195.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.28.192.0/22

address00001010.00011100.11000000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00011100.11000000.00000000

broadcast00001010.00011100.11000011.11111111

green = network part, grey = host part

hex0x0a1cc000

decimal169656320

reverse dns0.192.28.10.in-addr.arpa

ipv4-mapped::ffff:a1c:c000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.28.192.0/28	10.28.192.1 – 10.28.192.14	10.28.192.15
2	10.28.192.16/28	10.28.192.17 – 10.28.192.30	10.28.192.31
3	10.28.192.32/28	10.28.192.33 – 10.28.192.46	10.28.192.47
4	10.28.192.48/28	10.28.192.49 – 10.28.192.62	10.28.192.63
5	10.28.192.64/28	10.28.192.65 – 10.28.192.78	10.28.192.79
6	10.28.192.80/28	10.28.192.81 – 10.28.192.94	10.28.192.95
7	10.28.192.96/28	10.28.192.97 – 10.28.192.110	10.28.192.111
8	10.28.192.112/28	10.28.192.113 – 10.28.192.126	10.28.192.127
9	10.28.192.128/28	10.28.192.129 – 10.28.192.142	10.28.192.143
10	10.28.192.144/28	10.28.192.145 – 10.28.192.158	10.28.192.159
11	10.28.192.160/28	10.28.192.161 – 10.28.192.174	10.28.192.175
12	10.28.192.176/28	10.28.192.177 – 10.28.192.190	10.28.192.191
13	10.28.192.192/28	10.28.192.193 – 10.28.192.206	10.28.192.207
14	10.28.192.208/28	10.28.192.209 – 10.28.192.222	10.28.192.223
15	10.28.192.224/28	10.28.192.225 – 10.28.192.238	10.28.192.239
16	10.28.192.240/28	10.28.192.241 – 10.28.192.254	10.28.192.255
17	10.28.193.0/28	10.28.193.1 – 10.28.193.14	10.28.193.15
18	10.28.193.16/28	10.28.193.17 – 10.28.193.30	10.28.193.31
19	10.28.193.32/28	10.28.193.33 – 10.28.193.46	10.28.193.47
20	10.28.193.48/28	10.28.193.49 – 10.28.193.62	10.28.193.63
21	10.28.193.64/28	10.28.193.65 – 10.28.193.78	10.28.193.79
22	10.28.193.80/28	10.28.193.81 – 10.28.193.94	10.28.193.95
23	10.28.193.96/28	10.28.193.97 – 10.28.193.110	10.28.193.111
24	10.28.193.112/28	10.28.193.113 – 10.28.193.126	10.28.193.127
25	10.28.193.128/28	10.28.193.129 – 10.28.193.142	10.28.193.143
26	10.28.193.144/28	10.28.193.145 – 10.28.193.158	10.28.193.159
27	10.28.193.160/28	10.28.193.161 – 10.28.193.174	10.28.193.175
28	10.28.193.176/28	10.28.193.177 – 10.28.193.190	10.28.193.191
29	10.28.193.192/28	10.28.193.193 – 10.28.193.206	10.28.193.207
30	10.28.193.208/28	10.28.193.209 – 10.28.193.222	10.28.193.223
31	10.28.193.224/28	10.28.193.225 – 10.28.193.238	10.28.193.239
32	10.28.193.240/28	10.28.193.241 – 10.28.193.254	10.28.193.255
33	10.28.194.0/28	10.28.194.1 – 10.28.194.14	10.28.194.15
34	10.28.194.16/28	10.28.194.17 – 10.28.194.30	10.28.194.31
35	10.28.194.32/28	10.28.194.33 – 10.28.194.46	10.28.194.47
36	10.28.194.48/28	10.28.194.49 – 10.28.194.62	10.28.194.63
37	10.28.194.64/28	10.28.194.65 – 10.28.194.78	10.28.194.79
38	10.28.194.80/28	10.28.194.81 – 10.28.194.94	10.28.194.95
39	10.28.194.96/28	10.28.194.97 – 10.28.194.110	10.28.194.111
40	10.28.194.112/28	10.28.194.113 – 10.28.194.126	10.28.194.127
41	10.28.194.128/28	10.28.194.129 – 10.28.194.142	10.28.194.143
42	10.28.194.144/28	10.28.194.145 – 10.28.194.158	10.28.194.159
43	10.28.194.160/28	10.28.194.161 – 10.28.194.174	10.28.194.175
44	10.28.194.176/28	10.28.194.177 – 10.28.194.190	10.28.194.191
45	10.28.194.192/28	10.28.194.193 – 10.28.194.206	10.28.194.207
46	10.28.194.208/28	10.28.194.209 – 10.28.194.222	10.28.194.223
47	10.28.194.224/28	10.28.194.225 – 10.28.194.238	10.28.194.239
48	10.28.194.240/28	10.28.194.241 – 10.28.194.254	10.28.194.255
49	10.28.195.0/28	10.28.195.1 – 10.28.195.14	10.28.195.15
50	10.28.195.16/28	10.28.195.17 – 10.28.195.30	10.28.195.31
51	10.28.195.32/28	10.28.195.33 – 10.28.195.46	10.28.195.47
52	10.28.195.48/28	10.28.195.49 – 10.28.195.62	10.28.195.63
53	10.28.195.64/28	10.28.195.65 – 10.28.195.78	10.28.195.79
54	10.28.195.80/28	10.28.195.81 – 10.28.195.94	10.28.195.95
55	10.28.195.96/28	10.28.195.97 – 10.28.195.110	10.28.195.111
56	10.28.195.112/28	10.28.195.113 – 10.28.195.126	10.28.195.127
57	10.28.195.128/28	10.28.195.129 – 10.28.195.142	10.28.195.143
58	10.28.195.144/28	10.28.195.145 – 10.28.195.158	10.28.195.159
59	10.28.195.160/28	10.28.195.161 – 10.28.195.174	10.28.195.175
60	10.28.195.176/28	10.28.195.177 – 10.28.195.190	10.28.195.191
61	10.28.195.192/28	10.28.195.193 – 10.28.195.206	10.28.195.207
62	10.28.195.208/28	10.28.195.209 – 10.28.195.222	10.28.195.223
63	10.28.195.224/28	10.28.195.225 – 10.28.195.238	10.28.195.239
64	10.28.195.240/28	10.28.195.241 – 10.28.195.254	10.28.195.255

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 →