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)10.149.36.0/22

network10.149.36.0/22

broadcast10.149.39.255

first host10.149.36.1

last host10.149.39.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.149.36.0/22

address00001010.10010101.00100100.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010101.00100100.00000000

broadcast00001010.10010101.00100111.11111111

green = network part, grey = host part

hex0x0a952400

decimal177546240

reverse dns0.36.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:2400

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.149.36.0/28	10.149.36.1 – 10.149.36.14	10.149.36.15
2	10.149.36.16/28	10.149.36.17 – 10.149.36.30	10.149.36.31
3	10.149.36.32/28	10.149.36.33 – 10.149.36.46	10.149.36.47
4	10.149.36.48/28	10.149.36.49 – 10.149.36.62	10.149.36.63
5	10.149.36.64/28	10.149.36.65 – 10.149.36.78	10.149.36.79
6	10.149.36.80/28	10.149.36.81 – 10.149.36.94	10.149.36.95
7	10.149.36.96/28	10.149.36.97 – 10.149.36.110	10.149.36.111
8	10.149.36.112/28	10.149.36.113 – 10.149.36.126	10.149.36.127
9	10.149.36.128/28	10.149.36.129 – 10.149.36.142	10.149.36.143
10	10.149.36.144/28	10.149.36.145 – 10.149.36.158	10.149.36.159
11	10.149.36.160/28	10.149.36.161 – 10.149.36.174	10.149.36.175
12	10.149.36.176/28	10.149.36.177 – 10.149.36.190	10.149.36.191
13	10.149.36.192/28	10.149.36.193 – 10.149.36.206	10.149.36.207
14	10.149.36.208/28	10.149.36.209 – 10.149.36.222	10.149.36.223
15	10.149.36.224/28	10.149.36.225 – 10.149.36.238	10.149.36.239
16	10.149.36.240/28	10.149.36.241 – 10.149.36.254	10.149.36.255
17	10.149.37.0/28	10.149.37.1 – 10.149.37.14	10.149.37.15
18	10.149.37.16/28	10.149.37.17 – 10.149.37.30	10.149.37.31
19	10.149.37.32/28	10.149.37.33 – 10.149.37.46	10.149.37.47
20	10.149.37.48/28	10.149.37.49 – 10.149.37.62	10.149.37.63
21	10.149.37.64/28	10.149.37.65 – 10.149.37.78	10.149.37.79
22	10.149.37.80/28	10.149.37.81 – 10.149.37.94	10.149.37.95
23	10.149.37.96/28	10.149.37.97 – 10.149.37.110	10.149.37.111
24	10.149.37.112/28	10.149.37.113 – 10.149.37.126	10.149.37.127
25	10.149.37.128/28	10.149.37.129 – 10.149.37.142	10.149.37.143
26	10.149.37.144/28	10.149.37.145 – 10.149.37.158	10.149.37.159
27	10.149.37.160/28	10.149.37.161 – 10.149.37.174	10.149.37.175
28	10.149.37.176/28	10.149.37.177 – 10.149.37.190	10.149.37.191
29	10.149.37.192/28	10.149.37.193 – 10.149.37.206	10.149.37.207
30	10.149.37.208/28	10.149.37.209 – 10.149.37.222	10.149.37.223
31	10.149.37.224/28	10.149.37.225 – 10.149.37.238	10.149.37.239
32	10.149.37.240/28	10.149.37.241 – 10.149.37.254	10.149.37.255
33	10.149.38.0/28	10.149.38.1 – 10.149.38.14	10.149.38.15
34	10.149.38.16/28	10.149.38.17 – 10.149.38.30	10.149.38.31
35	10.149.38.32/28	10.149.38.33 – 10.149.38.46	10.149.38.47
36	10.149.38.48/28	10.149.38.49 – 10.149.38.62	10.149.38.63
37	10.149.38.64/28	10.149.38.65 – 10.149.38.78	10.149.38.79
38	10.149.38.80/28	10.149.38.81 – 10.149.38.94	10.149.38.95
39	10.149.38.96/28	10.149.38.97 – 10.149.38.110	10.149.38.111
40	10.149.38.112/28	10.149.38.113 – 10.149.38.126	10.149.38.127
41	10.149.38.128/28	10.149.38.129 – 10.149.38.142	10.149.38.143
42	10.149.38.144/28	10.149.38.145 – 10.149.38.158	10.149.38.159
43	10.149.38.160/28	10.149.38.161 – 10.149.38.174	10.149.38.175
44	10.149.38.176/28	10.149.38.177 – 10.149.38.190	10.149.38.191
45	10.149.38.192/28	10.149.38.193 – 10.149.38.206	10.149.38.207
46	10.149.38.208/28	10.149.38.209 – 10.149.38.222	10.149.38.223
47	10.149.38.224/28	10.149.38.225 – 10.149.38.238	10.149.38.239
48	10.149.38.240/28	10.149.38.241 – 10.149.38.254	10.149.38.255
49	10.149.39.0/28	10.149.39.1 – 10.149.39.14	10.149.39.15
50	10.149.39.16/28	10.149.39.17 – 10.149.39.30	10.149.39.31
51	10.149.39.32/28	10.149.39.33 – 10.149.39.46	10.149.39.47
52	10.149.39.48/28	10.149.39.49 – 10.149.39.62	10.149.39.63
53	10.149.39.64/28	10.149.39.65 – 10.149.39.78	10.149.39.79
54	10.149.39.80/28	10.149.39.81 – 10.149.39.94	10.149.39.95
55	10.149.39.96/28	10.149.39.97 – 10.149.39.110	10.149.39.111
56	10.149.39.112/28	10.149.39.113 – 10.149.39.126	10.149.39.127
57	10.149.39.128/28	10.149.39.129 – 10.149.39.142	10.149.39.143
58	10.149.39.144/28	10.149.39.145 – 10.149.39.158	10.149.39.159
59	10.149.39.160/28	10.149.39.161 – 10.149.39.174	10.149.39.175
60	10.149.39.176/28	10.149.39.177 – 10.149.39.190	10.149.39.191
61	10.149.39.192/28	10.149.39.193 – 10.149.39.206	10.149.39.207
62	10.149.39.208/28	10.149.39.209 – 10.149.39.222	10.149.39.223
63	10.149.39.224/28	10.149.39.225 – 10.149.39.238	10.149.39.239
64	10.149.39.240/28	10.149.39.241 – 10.149.39.254	10.149.39.255

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 →