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)10.2.104.0/22

network10.2.104.0/22

broadcast10.2.107.255

first host10.2.104.1

last host10.2.107.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.2.104.0/22

address00001010.00000010.01101000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000010.01101000.00000000

broadcast00001010.00000010.01101011.11111111

green = network part, grey = host part

hex0x0a026800

decimal167929856

reverse dns0.104.2.10.in-addr.arpa

ipv4-mapped::ffff:a02:6800

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.2.104.0/28	10.2.104.1 – 10.2.104.14	10.2.104.15
2	10.2.104.16/28	10.2.104.17 – 10.2.104.30	10.2.104.31
3	10.2.104.32/28	10.2.104.33 – 10.2.104.46	10.2.104.47
4	10.2.104.48/28	10.2.104.49 – 10.2.104.62	10.2.104.63
5	10.2.104.64/28	10.2.104.65 – 10.2.104.78	10.2.104.79
6	10.2.104.80/28	10.2.104.81 – 10.2.104.94	10.2.104.95
7	10.2.104.96/28	10.2.104.97 – 10.2.104.110	10.2.104.111
8	10.2.104.112/28	10.2.104.113 – 10.2.104.126	10.2.104.127
9	10.2.104.128/28	10.2.104.129 – 10.2.104.142	10.2.104.143
10	10.2.104.144/28	10.2.104.145 – 10.2.104.158	10.2.104.159
11	10.2.104.160/28	10.2.104.161 – 10.2.104.174	10.2.104.175
12	10.2.104.176/28	10.2.104.177 – 10.2.104.190	10.2.104.191
13	10.2.104.192/28	10.2.104.193 – 10.2.104.206	10.2.104.207
14	10.2.104.208/28	10.2.104.209 – 10.2.104.222	10.2.104.223
15	10.2.104.224/28	10.2.104.225 – 10.2.104.238	10.2.104.239
16	10.2.104.240/28	10.2.104.241 – 10.2.104.254	10.2.104.255
17	10.2.105.0/28	10.2.105.1 – 10.2.105.14	10.2.105.15
18	10.2.105.16/28	10.2.105.17 – 10.2.105.30	10.2.105.31
19	10.2.105.32/28	10.2.105.33 – 10.2.105.46	10.2.105.47
20	10.2.105.48/28	10.2.105.49 – 10.2.105.62	10.2.105.63
21	10.2.105.64/28	10.2.105.65 – 10.2.105.78	10.2.105.79
22	10.2.105.80/28	10.2.105.81 – 10.2.105.94	10.2.105.95
23	10.2.105.96/28	10.2.105.97 – 10.2.105.110	10.2.105.111
24	10.2.105.112/28	10.2.105.113 – 10.2.105.126	10.2.105.127
25	10.2.105.128/28	10.2.105.129 – 10.2.105.142	10.2.105.143
26	10.2.105.144/28	10.2.105.145 – 10.2.105.158	10.2.105.159
27	10.2.105.160/28	10.2.105.161 – 10.2.105.174	10.2.105.175
28	10.2.105.176/28	10.2.105.177 – 10.2.105.190	10.2.105.191
29	10.2.105.192/28	10.2.105.193 – 10.2.105.206	10.2.105.207
30	10.2.105.208/28	10.2.105.209 – 10.2.105.222	10.2.105.223
31	10.2.105.224/28	10.2.105.225 – 10.2.105.238	10.2.105.239
32	10.2.105.240/28	10.2.105.241 – 10.2.105.254	10.2.105.255
33	10.2.106.0/28	10.2.106.1 – 10.2.106.14	10.2.106.15
34	10.2.106.16/28	10.2.106.17 – 10.2.106.30	10.2.106.31
35	10.2.106.32/28	10.2.106.33 – 10.2.106.46	10.2.106.47
36	10.2.106.48/28	10.2.106.49 – 10.2.106.62	10.2.106.63
37	10.2.106.64/28	10.2.106.65 – 10.2.106.78	10.2.106.79
38	10.2.106.80/28	10.2.106.81 – 10.2.106.94	10.2.106.95
39	10.2.106.96/28	10.2.106.97 – 10.2.106.110	10.2.106.111
40	10.2.106.112/28	10.2.106.113 – 10.2.106.126	10.2.106.127
41	10.2.106.128/28	10.2.106.129 – 10.2.106.142	10.2.106.143
42	10.2.106.144/28	10.2.106.145 – 10.2.106.158	10.2.106.159
43	10.2.106.160/28	10.2.106.161 – 10.2.106.174	10.2.106.175
44	10.2.106.176/28	10.2.106.177 – 10.2.106.190	10.2.106.191
45	10.2.106.192/28	10.2.106.193 – 10.2.106.206	10.2.106.207
46	10.2.106.208/28	10.2.106.209 – 10.2.106.222	10.2.106.223
47	10.2.106.224/28	10.2.106.225 – 10.2.106.238	10.2.106.239
48	10.2.106.240/28	10.2.106.241 – 10.2.106.254	10.2.106.255
49	10.2.107.0/28	10.2.107.1 – 10.2.107.14	10.2.107.15
50	10.2.107.16/28	10.2.107.17 – 10.2.107.30	10.2.107.31
51	10.2.107.32/28	10.2.107.33 – 10.2.107.46	10.2.107.47
52	10.2.107.48/28	10.2.107.49 – 10.2.107.62	10.2.107.63
53	10.2.107.64/28	10.2.107.65 – 10.2.107.78	10.2.107.79
54	10.2.107.80/28	10.2.107.81 – 10.2.107.94	10.2.107.95
55	10.2.107.96/28	10.2.107.97 – 10.2.107.110	10.2.107.111
56	10.2.107.112/28	10.2.107.113 – 10.2.107.126	10.2.107.127
57	10.2.107.128/28	10.2.107.129 – 10.2.107.142	10.2.107.143
58	10.2.107.144/28	10.2.107.145 – 10.2.107.158	10.2.107.159
59	10.2.107.160/28	10.2.107.161 – 10.2.107.174	10.2.107.175
60	10.2.107.176/28	10.2.107.177 – 10.2.107.190	10.2.107.191
61	10.2.107.192/28	10.2.107.193 – 10.2.107.206	10.2.107.207
62	10.2.107.208/28	10.2.107.209 – 10.2.107.222	10.2.107.223
63	10.2.107.224/28	10.2.107.225 – 10.2.107.238	10.2.107.239
64	10.2.107.240/28	10.2.107.241 – 10.2.107.254	10.2.107.255

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 →