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)10.0.144.0/22

network10.0.144.0/22

broadcast10.0.147.255

first host10.0.144.1

last host10.0.147.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.0.144.0/22

address00001010.00000000.10010000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000000.10010000.00000000

broadcast00001010.00000000.10010011.11111111

green = network part, grey = host part

hex0x0a009000

decimal167809024

reverse dns0.144.0.10.in-addr.arpa

ipv4-mapped::ffff:a00:9000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.0.144.0/28	10.0.144.1 – 10.0.144.14	10.0.144.15
2	10.0.144.16/28	10.0.144.17 – 10.0.144.30	10.0.144.31
3	10.0.144.32/28	10.0.144.33 – 10.0.144.46	10.0.144.47
4	10.0.144.48/28	10.0.144.49 – 10.0.144.62	10.0.144.63
5	10.0.144.64/28	10.0.144.65 – 10.0.144.78	10.0.144.79
6	10.0.144.80/28	10.0.144.81 – 10.0.144.94	10.0.144.95
7	10.0.144.96/28	10.0.144.97 – 10.0.144.110	10.0.144.111
8	10.0.144.112/28	10.0.144.113 – 10.0.144.126	10.0.144.127
9	10.0.144.128/28	10.0.144.129 – 10.0.144.142	10.0.144.143
10	10.0.144.144/28	10.0.144.145 – 10.0.144.158	10.0.144.159
11	10.0.144.160/28	10.0.144.161 – 10.0.144.174	10.0.144.175
12	10.0.144.176/28	10.0.144.177 – 10.0.144.190	10.0.144.191
13	10.0.144.192/28	10.0.144.193 – 10.0.144.206	10.0.144.207
14	10.0.144.208/28	10.0.144.209 – 10.0.144.222	10.0.144.223
15	10.0.144.224/28	10.0.144.225 – 10.0.144.238	10.0.144.239
16	10.0.144.240/28	10.0.144.241 – 10.0.144.254	10.0.144.255
17	10.0.145.0/28	10.0.145.1 – 10.0.145.14	10.0.145.15
18	10.0.145.16/28	10.0.145.17 – 10.0.145.30	10.0.145.31
19	10.0.145.32/28	10.0.145.33 – 10.0.145.46	10.0.145.47
20	10.0.145.48/28	10.0.145.49 – 10.0.145.62	10.0.145.63
21	10.0.145.64/28	10.0.145.65 – 10.0.145.78	10.0.145.79
22	10.0.145.80/28	10.0.145.81 – 10.0.145.94	10.0.145.95
23	10.0.145.96/28	10.0.145.97 – 10.0.145.110	10.0.145.111
24	10.0.145.112/28	10.0.145.113 – 10.0.145.126	10.0.145.127
25	10.0.145.128/28	10.0.145.129 – 10.0.145.142	10.0.145.143
26	10.0.145.144/28	10.0.145.145 – 10.0.145.158	10.0.145.159
27	10.0.145.160/28	10.0.145.161 – 10.0.145.174	10.0.145.175
28	10.0.145.176/28	10.0.145.177 – 10.0.145.190	10.0.145.191
29	10.0.145.192/28	10.0.145.193 – 10.0.145.206	10.0.145.207
30	10.0.145.208/28	10.0.145.209 – 10.0.145.222	10.0.145.223
31	10.0.145.224/28	10.0.145.225 – 10.0.145.238	10.0.145.239
32	10.0.145.240/28	10.0.145.241 – 10.0.145.254	10.0.145.255
33	10.0.146.0/28	10.0.146.1 – 10.0.146.14	10.0.146.15
34	10.0.146.16/28	10.0.146.17 – 10.0.146.30	10.0.146.31
35	10.0.146.32/28	10.0.146.33 – 10.0.146.46	10.0.146.47
36	10.0.146.48/28	10.0.146.49 – 10.0.146.62	10.0.146.63
37	10.0.146.64/28	10.0.146.65 – 10.0.146.78	10.0.146.79
38	10.0.146.80/28	10.0.146.81 – 10.0.146.94	10.0.146.95
39	10.0.146.96/28	10.0.146.97 – 10.0.146.110	10.0.146.111
40	10.0.146.112/28	10.0.146.113 – 10.0.146.126	10.0.146.127
41	10.0.146.128/28	10.0.146.129 – 10.0.146.142	10.0.146.143
42	10.0.146.144/28	10.0.146.145 – 10.0.146.158	10.0.146.159
43	10.0.146.160/28	10.0.146.161 – 10.0.146.174	10.0.146.175
44	10.0.146.176/28	10.0.146.177 – 10.0.146.190	10.0.146.191
45	10.0.146.192/28	10.0.146.193 – 10.0.146.206	10.0.146.207
46	10.0.146.208/28	10.0.146.209 – 10.0.146.222	10.0.146.223
47	10.0.146.224/28	10.0.146.225 – 10.0.146.238	10.0.146.239
48	10.0.146.240/28	10.0.146.241 – 10.0.146.254	10.0.146.255
49	10.0.147.0/28	10.0.147.1 – 10.0.147.14	10.0.147.15
50	10.0.147.16/28	10.0.147.17 – 10.0.147.30	10.0.147.31
51	10.0.147.32/28	10.0.147.33 – 10.0.147.46	10.0.147.47
52	10.0.147.48/28	10.0.147.49 – 10.0.147.62	10.0.147.63
53	10.0.147.64/28	10.0.147.65 – 10.0.147.78	10.0.147.79
54	10.0.147.80/28	10.0.147.81 – 10.0.147.94	10.0.147.95
55	10.0.147.96/28	10.0.147.97 – 10.0.147.110	10.0.147.111
56	10.0.147.112/28	10.0.147.113 – 10.0.147.126	10.0.147.127
57	10.0.147.128/28	10.0.147.129 – 10.0.147.142	10.0.147.143
58	10.0.147.144/28	10.0.147.145 – 10.0.147.158	10.0.147.159
59	10.0.147.160/28	10.0.147.161 – 10.0.147.174	10.0.147.175
60	10.0.147.176/28	10.0.147.177 – 10.0.147.190	10.0.147.191
61	10.0.147.192/28	10.0.147.193 – 10.0.147.206	10.0.147.207
62	10.0.147.208/28	10.0.147.209 – 10.0.147.222	10.0.147.223
63	10.0.147.224/28	10.0.147.225 – 10.0.147.238	10.0.147.239
64	10.0.147.240/28	10.0.147.241 – 10.0.147.254	10.0.147.255

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 →