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)10.149.0.0/22

network10.149.0.0/22

broadcast10.149.3.255

first host10.149.0.1

last host10.149.3.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.149.0.0/22

address00001010.10010101.00000000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.10010101.00000000.00000000

broadcast00001010.10010101.00000011.11111111

green = network part, grey = host part

hex0x0a950000

decimal177537024

reverse dns0.0.149.10.in-addr.arpa

ipv4-mapped::ffff:a95:0

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.149.0.0/28	10.149.0.1 – 10.149.0.14	10.149.0.15
2	10.149.0.16/28	10.149.0.17 – 10.149.0.30	10.149.0.31
3	10.149.0.32/28	10.149.0.33 – 10.149.0.46	10.149.0.47
4	10.149.0.48/28	10.149.0.49 – 10.149.0.62	10.149.0.63
5	10.149.0.64/28	10.149.0.65 – 10.149.0.78	10.149.0.79
6	10.149.0.80/28	10.149.0.81 – 10.149.0.94	10.149.0.95
7	10.149.0.96/28	10.149.0.97 – 10.149.0.110	10.149.0.111
8	10.149.0.112/28	10.149.0.113 – 10.149.0.126	10.149.0.127
9	10.149.0.128/28	10.149.0.129 – 10.149.0.142	10.149.0.143
10	10.149.0.144/28	10.149.0.145 – 10.149.0.158	10.149.0.159
11	10.149.0.160/28	10.149.0.161 – 10.149.0.174	10.149.0.175
12	10.149.0.176/28	10.149.0.177 – 10.149.0.190	10.149.0.191
13	10.149.0.192/28	10.149.0.193 – 10.149.0.206	10.149.0.207
14	10.149.0.208/28	10.149.0.209 – 10.149.0.222	10.149.0.223
15	10.149.0.224/28	10.149.0.225 – 10.149.0.238	10.149.0.239
16	10.149.0.240/28	10.149.0.241 – 10.149.0.254	10.149.0.255
17	10.149.1.0/28	10.149.1.1 – 10.149.1.14	10.149.1.15
18	10.149.1.16/28	10.149.1.17 – 10.149.1.30	10.149.1.31
19	10.149.1.32/28	10.149.1.33 – 10.149.1.46	10.149.1.47
20	10.149.1.48/28	10.149.1.49 – 10.149.1.62	10.149.1.63
21	10.149.1.64/28	10.149.1.65 – 10.149.1.78	10.149.1.79
22	10.149.1.80/28	10.149.1.81 – 10.149.1.94	10.149.1.95
23	10.149.1.96/28	10.149.1.97 – 10.149.1.110	10.149.1.111
24	10.149.1.112/28	10.149.1.113 – 10.149.1.126	10.149.1.127
25	10.149.1.128/28	10.149.1.129 – 10.149.1.142	10.149.1.143
26	10.149.1.144/28	10.149.1.145 – 10.149.1.158	10.149.1.159
27	10.149.1.160/28	10.149.1.161 – 10.149.1.174	10.149.1.175
28	10.149.1.176/28	10.149.1.177 – 10.149.1.190	10.149.1.191
29	10.149.1.192/28	10.149.1.193 – 10.149.1.206	10.149.1.207
30	10.149.1.208/28	10.149.1.209 – 10.149.1.222	10.149.1.223
31	10.149.1.224/28	10.149.1.225 – 10.149.1.238	10.149.1.239
32	10.149.1.240/28	10.149.1.241 – 10.149.1.254	10.149.1.255
33	10.149.2.0/28	10.149.2.1 – 10.149.2.14	10.149.2.15
34	10.149.2.16/28	10.149.2.17 – 10.149.2.30	10.149.2.31
35	10.149.2.32/28	10.149.2.33 – 10.149.2.46	10.149.2.47
36	10.149.2.48/28	10.149.2.49 – 10.149.2.62	10.149.2.63
37	10.149.2.64/28	10.149.2.65 – 10.149.2.78	10.149.2.79
38	10.149.2.80/28	10.149.2.81 – 10.149.2.94	10.149.2.95
39	10.149.2.96/28	10.149.2.97 – 10.149.2.110	10.149.2.111
40	10.149.2.112/28	10.149.2.113 – 10.149.2.126	10.149.2.127
41	10.149.2.128/28	10.149.2.129 – 10.149.2.142	10.149.2.143
42	10.149.2.144/28	10.149.2.145 – 10.149.2.158	10.149.2.159
43	10.149.2.160/28	10.149.2.161 – 10.149.2.174	10.149.2.175
44	10.149.2.176/28	10.149.2.177 – 10.149.2.190	10.149.2.191
45	10.149.2.192/28	10.149.2.193 – 10.149.2.206	10.149.2.207
46	10.149.2.208/28	10.149.2.209 – 10.149.2.222	10.149.2.223
47	10.149.2.224/28	10.149.2.225 – 10.149.2.238	10.149.2.239
48	10.149.2.240/28	10.149.2.241 – 10.149.2.254	10.149.2.255
49	10.149.3.0/28	10.149.3.1 – 10.149.3.14	10.149.3.15
50	10.149.3.16/28	10.149.3.17 – 10.149.3.30	10.149.3.31
51	10.149.3.32/28	10.149.3.33 – 10.149.3.46	10.149.3.47
52	10.149.3.48/28	10.149.3.49 – 10.149.3.62	10.149.3.63
53	10.149.3.64/28	10.149.3.65 – 10.149.3.78	10.149.3.79
54	10.149.3.80/28	10.149.3.81 – 10.149.3.94	10.149.3.95
55	10.149.3.96/28	10.149.3.97 – 10.149.3.110	10.149.3.111
56	10.149.3.112/28	10.149.3.113 – 10.149.3.126	10.149.3.127
57	10.149.3.128/28	10.149.3.129 – 10.149.3.142	10.149.3.143
58	10.149.3.144/28	10.149.3.145 – 10.149.3.158	10.149.3.159
59	10.149.3.160/28	10.149.3.161 – 10.149.3.174	10.149.3.175
60	10.149.3.176/28	10.149.3.177 – 10.149.3.190	10.149.3.191
61	10.149.3.192/28	10.149.3.193 – 10.149.3.206	10.149.3.207
62	10.149.3.208/28	10.149.3.209 – 10.149.3.222	10.149.3.223
63	10.149.3.224/28	10.149.3.225 – 10.149.3.238	10.149.3.239
64	10.149.3.240/28	10.149.3.241 – 10.149.3.254	10.149.3.255

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 →