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)10.91.4.0/22

network10.91.4.0/22

broadcast10.91.7.255

first host10.91.4.1

last host10.91.7.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.91.4.0/22

address00001010.01011011.00000100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01011011.00000100.00000000

broadcast00001010.01011011.00000111.11111111

green = network part, grey = host part

hex0x0a5b0400

decimal173736960

reverse dns0.4.91.10.in-addr.arpa

ipv4-mapped::ffff:a5b:400

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.91.4.0/28	10.91.4.1 – 10.91.4.14	10.91.4.15
2	10.91.4.16/28	10.91.4.17 – 10.91.4.30	10.91.4.31
3	10.91.4.32/28	10.91.4.33 – 10.91.4.46	10.91.4.47
4	10.91.4.48/28	10.91.4.49 – 10.91.4.62	10.91.4.63
5	10.91.4.64/28	10.91.4.65 – 10.91.4.78	10.91.4.79
6	10.91.4.80/28	10.91.4.81 – 10.91.4.94	10.91.4.95
7	10.91.4.96/28	10.91.4.97 – 10.91.4.110	10.91.4.111
8	10.91.4.112/28	10.91.4.113 – 10.91.4.126	10.91.4.127
9	10.91.4.128/28	10.91.4.129 – 10.91.4.142	10.91.4.143
10	10.91.4.144/28	10.91.4.145 – 10.91.4.158	10.91.4.159
11	10.91.4.160/28	10.91.4.161 – 10.91.4.174	10.91.4.175
12	10.91.4.176/28	10.91.4.177 – 10.91.4.190	10.91.4.191
13	10.91.4.192/28	10.91.4.193 – 10.91.4.206	10.91.4.207
14	10.91.4.208/28	10.91.4.209 – 10.91.4.222	10.91.4.223
15	10.91.4.224/28	10.91.4.225 – 10.91.4.238	10.91.4.239
16	10.91.4.240/28	10.91.4.241 – 10.91.4.254	10.91.4.255
17	10.91.5.0/28	10.91.5.1 – 10.91.5.14	10.91.5.15
18	10.91.5.16/28	10.91.5.17 – 10.91.5.30	10.91.5.31
19	10.91.5.32/28	10.91.5.33 – 10.91.5.46	10.91.5.47
20	10.91.5.48/28	10.91.5.49 – 10.91.5.62	10.91.5.63
21	10.91.5.64/28	10.91.5.65 – 10.91.5.78	10.91.5.79
22	10.91.5.80/28	10.91.5.81 – 10.91.5.94	10.91.5.95
23	10.91.5.96/28	10.91.5.97 – 10.91.5.110	10.91.5.111
24	10.91.5.112/28	10.91.5.113 – 10.91.5.126	10.91.5.127
25	10.91.5.128/28	10.91.5.129 – 10.91.5.142	10.91.5.143
26	10.91.5.144/28	10.91.5.145 – 10.91.5.158	10.91.5.159
27	10.91.5.160/28	10.91.5.161 – 10.91.5.174	10.91.5.175
28	10.91.5.176/28	10.91.5.177 – 10.91.5.190	10.91.5.191
29	10.91.5.192/28	10.91.5.193 – 10.91.5.206	10.91.5.207
30	10.91.5.208/28	10.91.5.209 – 10.91.5.222	10.91.5.223
31	10.91.5.224/28	10.91.5.225 – 10.91.5.238	10.91.5.239
32	10.91.5.240/28	10.91.5.241 – 10.91.5.254	10.91.5.255
33	10.91.6.0/28	10.91.6.1 – 10.91.6.14	10.91.6.15
34	10.91.6.16/28	10.91.6.17 – 10.91.6.30	10.91.6.31
35	10.91.6.32/28	10.91.6.33 – 10.91.6.46	10.91.6.47
36	10.91.6.48/28	10.91.6.49 – 10.91.6.62	10.91.6.63
37	10.91.6.64/28	10.91.6.65 – 10.91.6.78	10.91.6.79
38	10.91.6.80/28	10.91.6.81 – 10.91.6.94	10.91.6.95
39	10.91.6.96/28	10.91.6.97 – 10.91.6.110	10.91.6.111
40	10.91.6.112/28	10.91.6.113 – 10.91.6.126	10.91.6.127
41	10.91.6.128/28	10.91.6.129 – 10.91.6.142	10.91.6.143
42	10.91.6.144/28	10.91.6.145 – 10.91.6.158	10.91.6.159
43	10.91.6.160/28	10.91.6.161 – 10.91.6.174	10.91.6.175
44	10.91.6.176/28	10.91.6.177 – 10.91.6.190	10.91.6.191
45	10.91.6.192/28	10.91.6.193 – 10.91.6.206	10.91.6.207
46	10.91.6.208/28	10.91.6.209 – 10.91.6.222	10.91.6.223
47	10.91.6.224/28	10.91.6.225 – 10.91.6.238	10.91.6.239
48	10.91.6.240/28	10.91.6.241 – 10.91.6.254	10.91.6.255
49	10.91.7.0/28	10.91.7.1 – 10.91.7.14	10.91.7.15
50	10.91.7.16/28	10.91.7.17 – 10.91.7.30	10.91.7.31
51	10.91.7.32/28	10.91.7.33 – 10.91.7.46	10.91.7.47
52	10.91.7.48/28	10.91.7.49 – 10.91.7.62	10.91.7.63
53	10.91.7.64/28	10.91.7.65 – 10.91.7.78	10.91.7.79
54	10.91.7.80/28	10.91.7.81 – 10.91.7.94	10.91.7.95
55	10.91.7.96/28	10.91.7.97 – 10.91.7.110	10.91.7.111
56	10.91.7.112/28	10.91.7.113 – 10.91.7.126	10.91.7.127
57	10.91.7.128/28	10.91.7.129 – 10.91.7.142	10.91.7.143
58	10.91.7.144/28	10.91.7.145 – 10.91.7.158	10.91.7.159
59	10.91.7.160/28	10.91.7.161 – 10.91.7.174	10.91.7.175
60	10.91.7.176/28	10.91.7.177 – 10.91.7.190	10.91.7.191
61	10.91.7.192/28	10.91.7.193 – 10.91.7.206	10.91.7.207
62	10.91.7.208/28	10.91.7.209 – 10.91.7.222	10.91.7.223
63	10.91.7.224/28	10.91.7.225 – 10.91.7.238	10.91.7.239
64	10.91.7.240/28	10.91.7.241 – 10.91.7.254	10.91.7.255

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 →