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)10.151.112.0/22

network10.151.112.0/22

broadcast10.151.115.255

first host10.151.112.1

last host10.151.115.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.151.112.0/22

address00001010.10010111.01110000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010111.01110000.00000000

broadcast00001010.10010111.01110011.11111111

green = network part, grey = host part

hex0x0a977000

decimal177696768

reverse dns0.112.151.10.in-addr.arpa

ipv4-mapped::ffff:a97:7000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.151.112.0/28	10.151.112.1 – 10.151.112.14	10.151.112.15
2	10.151.112.16/28	10.151.112.17 – 10.151.112.30	10.151.112.31
3	10.151.112.32/28	10.151.112.33 – 10.151.112.46	10.151.112.47
4	10.151.112.48/28	10.151.112.49 – 10.151.112.62	10.151.112.63
5	10.151.112.64/28	10.151.112.65 – 10.151.112.78	10.151.112.79
6	10.151.112.80/28	10.151.112.81 – 10.151.112.94	10.151.112.95
7	10.151.112.96/28	10.151.112.97 – 10.151.112.110	10.151.112.111
8	10.151.112.112/28	10.151.112.113 – 10.151.112.126	10.151.112.127
9	10.151.112.128/28	10.151.112.129 – 10.151.112.142	10.151.112.143
10	10.151.112.144/28	10.151.112.145 – 10.151.112.158	10.151.112.159
11	10.151.112.160/28	10.151.112.161 – 10.151.112.174	10.151.112.175
12	10.151.112.176/28	10.151.112.177 – 10.151.112.190	10.151.112.191
13	10.151.112.192/28	10.151.112.193 – 10.151.112.206	10.151.112.207
14	10.151.112.208/28	10.151.112.209 – 10.151.112.222	10.151.112.223
15	10.151.112.224/28	10.151.112.225 – 10.151.112.238	10.151.112.239
16	10.151.112.240/28	10.151.112.241 – 10.151.112.254	10.151.112.255
17	10.151.113.0/28	10.151.113.1 – 10.151.113.14	10.151.113.15
18	10.151.113.16/28	10.151.113.17 – 10.151.113.30	10.151.113.31
19	10.151.113.32/28	10.151.113.33 – 10.151.113.46	10.151.113.47
20	10.151.113.48/28	10.151.113.49 – 10.151.113.62	10.151.113.63
21	10.151.113.64/28	10.151.113.65 – 10.151.113.78	10.151.113.79
22	10.151.113.80/28	10.151.113.81 – 10.151.113.94	10.151.113.95
23	10.151.113.96/28	10.151.113.97 – 10.151.113.110	10.151.113.111
24	10.151.113.112/28	10.151.113.113 – 10.151.113.126	10.151.113.127
25	10.151.113.128/28	10.151.113.129 – 10.151.113.142	10.151.113.143
26	10.151.113.144/28	10.151.113.145 – 10.151.113.158	10.151.113.159
27	10.151.113.160/28	10.151.113.161 – 10.151.113.174	10.151.113.175
28	10.151.113.176/28	10.151.113.177 – 10.151.113.190	10.151.113.191
29	10.151.113.192/28	10.151.113.193 – 10.151.113.206	10.151.113.207
30	10.151.113.208/28	10.151.113.209 – 10.151.113.222	10.151.113.223
31	10.151.113.224/28	10.151.113.225 – 10.151.113.238	10.151.113.239
32	10.151.113.240/28	10.151.113.241 – 10.151.113.254	10.151.113.255
33	10.151.114.0/28	10.151.114.1 – 10.151.114.14	10.151.114.15
34	10.151.114.16/28	10.151.114.17 – 10.151.114.30	10.151.114.31
35	10.151.114.32/28	10.151.114.33 – 10.151.114.46	10.151.114.47
36	10.151.114.48/28	10.151.114.49 – 10.151.114.62	10.151.114.63
37	10.151.114.64/28	10.151.114.65 – 10.151.114.78	10.151.114.79
38	10.151.114.80/28	10.151.114.81 – 10.151.114.94	10.151.114.95
39	10.151.114.96/28	10.151.114.97 – 10.151.114.110	10.151.114.111
40	10.151.114.112/28	10.151.114.113 – 10.151.114.126	10.151.114.127
41	10.151.114.128/28	10.151.114.129 – 10.151.114.142	10.151.114.143
42	10.151.114.144/28	10.151.114.145 – 10.151.114.158	10.151.114.159
43	10.151.114.160/28	10.151.114.161 – 10.151.114.174	10.151.114.175
44	10.151.114.176/28	10.151.114.177 – 10.151.114.190	10.151.114.191
45	10.151.114.192/28	10.151.114.193 – 10.151.114.206	10.151.114.207
46	10.151.114.208/28	10.151.114.209 – 10.151.114.222	10.151.114.223
47	10.151.114.224/28	10.151.114.225 – 10.151.114.238	10.151.114.239
48	10.151.114.240/28	10.151.114.241 – 10.151.114.254	10.151.114.255
49	10.151.115.0/28	10.151.115.1 – 10.151.115.14	10.151.115.15
50	10.151.115.16/28	10.151.115.17 – 10.151.115.30	10.151.115.31
51	10.151.115.32/28	10.151.115.33 – 10.151.115.46	10.151.115.47
52	10.151.115.48/28	10.151.115.49 – 10.151.115.62	10.151.115.63
53	10.151.115.64/28	10.151.115.65 – 10.151.115.78	10.151.115.79
54	10.151.115.80/28	10.151.115.81 – 10.151.115.94	10.151.115.95
55	10.151.115.96/28	10.151.115.97 – 10.151.115.110	10.151.115.111
56	10.151.115.112/28	10.151.115.113 – 10.151.115.126	10.151.115.127
57	10.151.115.128/28	10.151.115.129 – 10.151.115.142	10.151.115.143
58	10.151.115.144/28	10.151.115.145 – 10.151.115.158	10.151.115.159
59	10.151.115.160/28	10.151.115.161 – 10.151.115.174	10.151.115.175
60	10.151.115.176/28	10.151.115.177 – 10.151.115.190	10.151.115.191
61	10.151.115.192/28	10.151.115.193 – 10.151.115.206	10.151.115.207
62	10.151.115.208/28	10.151.115.209 – 10.151.115.222	10.151.115.223
63	10.151.115.224/28	10.151.115.225 – 10.151.115.238	10.151.115.239
64	10.151.115.240/28	10.151.115.241 – 10.151.115.254	10.151.115.255

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 →