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)10.151.92.0/22

network10.151.92.0/22

broadcast10.151.95.255

first host10.151.92.1

last host10.151.95.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.151.92.0/22

address00001010.10010111.01011100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010111.01011100.00000000

broadcast00001010.10010111.01011111.11111111

green = network part, grey = host part

hex0x0a975c00

decimal177691648

reverse dns0.92.151.10.in-addr.arpa

ipv4-mapped::ffff:a97:5c00

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.151.92.0/28	10.151.92.1 – 10.151.92.14	10.151.92.15
2	10.151.92.16/28	10.151.92.17 – 10.151.92.30	10.151.92.31
3	10.151.92.32/28	10.151.92.33 – 10.151.92.46	10.151.92.47
4	10.151.92.48/28	10.151.92.49 – 10.151.92.62	10.151.92.63
5	10.151.92.64/28	10.151.92.65 – 10.151.92.78	10.151.92.79
6	10.151.92.80/28	10.151.92.81 – 10.151.92.94	10.151.92.95
7	10.151.92.96/28	10.151.92.97 – 10.151.92.110	10.151.92.111
8	10.151.92.112/28	10.151.92.113 – 10.151.92.126	10.151.92.127
9	10.151.92.128/28	10.151.92.129 – 10.151.92.142	10.151.92.143
10	10.151.92.144/28	10.151.92.145 – 10.151.92.158	10.151.92.159
11	10.151.92.160/28	10.151.92.161 – 10.151.92.174	10.151.92.175
12	10.151.92.176/28	10.151.92.177 – 10.151.92.190	10.151.92.191
13	10.151.92.192/28	10.151.92.193 – 10.151.92.206	10.151.92.207
14	10.151.92.208/28	10.151.92.209 – 10.151.92.222	10.151.92.223
15	10.151.92.224/28	10.151.92.225 – 10.151.92.238	10.151.92.239
16	10.151.92.240/28	10.151.92.241 – 10.151.92.254	10.151.92.255
17	10.151.93.0/28	10.151.93.1 – 10.151.93.14	10.151.93.15
18	10.151.93.16/28	10.151.93.17 – 10.151.93.30	10.151.93.31
19	10.151.93.32/28	10.151.93.33 – 10.151.93.46	10.151.93.47
20	10.151.93.48/28	10.151.93.49 – 10.151.93.62	10.151.93.63
21	10.151.93.64/28	10.151.93.65 – 10.151.93.78	10.151.93.79
22	10.151.93.80/28	10.151.93.81 – 10.151.93.94	10.151.93.95
23	10.151.93.96/28	10.151.93.97 – 10.151.93.110	10.151.93.111
24	10.151.93.112/28	10.151.93.113 – 10.151.93.126	10.151.93.127
25	10.151.93.128/28	10.151.93.129 – 10.151.93.142	10.151.93.143
26	10.151.93.144/28	10.151.93.145 – 10.151.93.158	10.151.93.159
27	10.151.93.160/28	10.151.93.161 – 10.151.93.174	10.151.93.175
28	10.151.93.176/28	10.151.93.177 – 10.151.93.190	10.151.93.191
29	10.151.93.192/28	10.151.93.193 – 10.151.93.206	10.151.93.207
30	10.151.93.208/28	10.151.93.209 – 10.151.93.222	10.151.93.223
31	10.151.93.224/28	10.151.93.225 – 10.151.93.238	10.151.93.239
32	10.151.93.240/28	10.151.93.241 – 10.151.93.254	10.151.93.255
33	10.151.94.0/28	10.151.94.1 – 10.151.94.14	10.151.94.15
34	10.151.94.16/28	10.151.94.17 – 10.151.94.30	10.151.94.31
35	10.151.94.32/28	10.151.94.33 – 10.151.94.46	10.151.94.47
36	10.151.94.48/28	10.151.94.49 – 10.151.94.62	10.151.94.63
37	10.151.94.64/28	10.151.94.65 – 10.151.94.78	10.151.94.79
38	10.151.94.80/28	10.151.94.81 – 10.151.94.94	10.151.94.95
39	10.151.94.96/28	10.151.94.97 – 10.151.94.110	10.151.94.111
40	10.151.94.112/28	10.151.94.113 – 10.151.94.126	10.151.94.127
41	10.151.94.128/28	10.151.94.129 – 10.151.94.142	10.151.94.143
42	10.151.94.144/28	10.151.94.145 – 10.151.94.158	10.151.94.159
43	10.151.94.160/28	10.151.94.161 – 10.151.94.174	10.151.94.175
44	10.151.94.176/28	10.151.94.177 – 10.151.94.190	10.151.94.191
45	10.151.94.192/28	10.151.94.193 – 10.151.94.206	10.151.94.207
46	10.151.94.208/28	10.151.94.209 – 10.151.94.222	10.151.94.223
47	10.151.94.224/28	10.151.94.225 – 10.151.94.238	10.151.94.239
48	10.151.94.240/28	10.151.94.241 – 10.151.94.254	10.151.94.255
49	10.151.95.0/28	10.151.95.1 – 10.151.95.14	10.151.95.15
50	10.151.95.16/28	10.151.95.17 – 10.151.95.30	10.151.95.31
51	10.151.95.32/28	10.151.95.33 – 10.151.95.46	10.151.95.47
52	10.151.95.48/28	10.151.95.49 – 10.151.95.62	10.151.95.63
53	10.151.95.64/28	10.151.95.65 – 10.151.95.78	10.151.95.79
54	10.151.95.80/28	10.151.95.81 – 10.151.95.94	10.151.95.95
55	10.151.95.96/28	10.151.95.97 – 10.151.95.110	10.151.95.111
56	10.151.95.112/28	10.151.95.113 – 10.151.95.126	10.151.95.127
57	10.151.95.128/28	10.151.95.129 – 10.151.95.142	10.151.95.143
58	10.151.95.144/28	10.151.95.145 – 10.151.95.158	10.151.95.159
59	10.151.95.160/28	10.151.95.161 – 10.151.95.174	10.151.95.175
60	10.151.95.176/28	10.151.95.177 – 10.151.95.190	10.151.95.191
61	10.151.95.192/28	10.151.95.193 – 10.151.95.206	10.151.95.207
62	10.151.95.208/28	10.151.95.209 – 10.151.95.222	10.151.95.223
63	10.151.95.224/28	10.151.95.225 – 10.151.95.238	10.151.95.239
64	10.151.95.240/28	10.151.95.241 – 10.151.95.254	10.151.95.255

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 →