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)10.151.84.0/22

network10.151.84.0/22

broadcast10.151.87.255

first host10.151.84.1

last host10.151.87.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.151.84.0/22

address00001010.10010111.01010100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010111.01010100.00000000

broadcast00001010.10010111.01010111.11111111

green = network part, grey = host part

hex0x0a975400

decimal177689600

reverse dns0.84.151.10.in-addr.arpa

ipv4-mapped::ffff:a97:5400

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.151.84.0/28	10.151.84.1 – 10.151.84.14	10.151.84.15
2	10.151.84.16/28	10.151.84.17 – 10.151.84.30	10.151.84.31
3	10.151.84.32/28	10.151.84.33 – 10.151.84.46	10.151.84.47
4	10.151.84.48/28	10.151.84.49 – 10.151.84.62	10.151.84.63
5	10.151.84.64/28	10.151.84.65 – 10.151.84.78	10.151.84.79
6	10.151.84.80/28	10.151.84.81 – 10.151.84.94	10.151.84.95
7	10.151.84.96/28	10.151.84.97 – 10.151.84.110	10.151.84.111
8	10.151.84.112/28	10.151.84.113 – 10.151.84.126	10.151.84.127
9	10.151.84.128/28	10.151.84.129 – 10.151.84.142	10.151.84.143
10	10.151.84.144/28	10.151.84.145 – 10.151.84.158	10.151.84.159
11	10.151.84.160/28	10.151.84.161 – 10.151.84.174	10.151.84.175
12	10.151.84.176/28	10.151.84.177 – 10.151.84.190	10.151.84.191
13	10.151.84.192/28	10.151.84.193 – 10.151.84.206	10.151.84.207
14	10.151.84.208/28	10.151.84.209 – 10.151.84.222	10.151.84.223
15	10.151.84.224/28	10.151.84.225 – 10.151.84.238	10.151.84.239
16	10.151.84.240/28	10.151.84.241 – 10.151.84.254	10.151.84.255
17	10.151.85.0/28	10.151.85.1 – 10.151.85.14	10.151.85.15
18	10.151.85.16/28	10.151.85.17 – 10.151.85.30	10.151.85.31
19	10.151.85.32/28	10.151.85.33 – 10.151.85.46	10.151.85.47
20	10.151.85.48/28	10.151.85.49 – 10.151.85.62	10.151.85.63
21	10.151.85.64/28	10.151.85.65 – 10.151.85.78	10.151.85.79
22	10.151.85.80/28	10.151.85.81 – 10.151.85.94	10.151.85.95
23	10.151.85.96/28	10.151.85.97 – 10.151.85.110	10.151.85.111
24	10.151.85.112/28	10.151.85.113 – 10.151.85.126	10.151.85.127
25	10.151.85.128/28	10.151.85.129 – 10.151.85.142	10.151.85.143
26	10.151.85.144/28	10.151.85.145 – 10.151.85.158	10.151.85.159
27	10.151.85.160/28	10.151.85.161 – 10.151.85.174	10.151.85.175
28	10.151.85.176/28	10.151.85.177 – 10.151.85.190	10.151.85.191
29	10.151.85.192/28	10.151.85.193 – 10.151.85.206	10.151.85.207
30	10.151.85.208/28	10.151.85.209 – 10.151.85.222	10.151.85.223
31	10.151.85.224/28	10.151.85.225 – 10.151.85.238	10.151.85.239
32	10.151.85.240/28	10.151.85.241 – 10.151.85.254	10.151.85.255
33	10.151.86.0/28	10.151.86.1 – 10.151.86.14	10.151.86.15
34	10.151.86.16/28	10.151.86.17 – 10.151.86.30	10.151.86.31
35	10.151.86.32/28	10.151.86.33 – 10.151.86.46	10.151.86.47
36	10.151.86.48/28	10.151.86.49 – 10.151.86.62	10.151.86.63
37	10.151.86.64/28	10.151.86.65 – 10.151.86.78	10.151.86.79
38	10.151.86.80/28	10.151.86.81 – 10.151.86.94	10.151.86.95
39	10.151.86.96/28	10.151.86.97 – 10.151.86.110	10.151.86.111
40	10.151.86.112/28	10.151.86.113 – 10.151.86.126	10.151.86.127
41	10.151.86.128/28	10.151.86.129 – 10.151.86.142	10.151.86.143
42	10.151.86.144/28	10.151.86.145 – 10.151.86.158	10.151.86.159
43	10.151.86.160/28	10.151.86.161 – 10.151.86.174	10.151.86.175
44	10.151.86.176/28	10.151.86.177 – 10.151.86.190	10.151.86.191
45	10.151.86.192/28	10.151.86.193 – 10.151.86.206	10.151.86.207
46	10.151.86.208/28	10.151.86.209 – 10.151.86.222	10.151.86.223
47	10.151.86.224/28	10.151.86.225 – 10.151.86.238	10.151.86.239
48	10.151.86.240/28	10.151.86.241 – 10.151.86.254	10.151.86.255
49	10.151.87.0/28	10.151.87.1 – 10.151.87.14	10.151.87.15
50	10.151.87.16/28	10.151.87.17 – 10.151.87.30	10.151.87.31
51	10.151.87.32/28	10.151.87.33 – 10.151.87.46	10.151.87.47
52	10.151.87.48/28	10.151.87.49 – 10.151.87.62	10.151.87.63
53	10.151.87.64/28	10.151.87.65 – 10.151.87.78	10.151.87.79
54	10.151.87.80/28	10.151.87.81 – 10.151.87.94	10.151.87.95
55	10.151.87.96/28	10.151.87.97 – 10.151.87.110	10.151.87.111
56	10.151.87.112/28	10.151.87.113 – 10.151.87.126	10.151.87.127
57	10.151.87.128/28	10.151.87.129 – 10.151.87.142	10.151.87.143
58	10.151.87.144/28	10.151.87.145 – 10.151.87.158	10.151.87.159
59	10.151.87.160/28	10.151.87.161 – 10.151.87.174	10.151.87.175
60	10.151.87.176/28	10.151.87.177 – 10.151.87.190	10.151.87.191
61	10.151.87.192/28	10.151.87.193 – 10.151.87.206	10.151.87.207
62	10.151.87.208/28	10.151.87.209 – 10.151.87.222	10.151.87.223
63	10.151.87.224/28	10.151.87.225 – 10.151.87.238	10.151.87.239
64	10.151.87.240/28	10.151.87.241 – 10.151.87.254	10.151.87.255

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 →