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)10.71.176.0/22

network10.71.176.0/22

broadcast10.71.179.255

first host10.71.176.1

last host10.71.179.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.71.176.0/22

address00001010.01000111.10110000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.01000111.10110000.00000000

broadcast00001010.01000111.10110011.11111111

green = network part, grey = host part

hex0x0a47b000

decimal172470272

reverse dns0.176.71.10.in-addr.arpa

ipv4-mapped::ffff:a47:b000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.71.176.0/28	10.71.176.1 – 10.71.176.14	10.71.176.15
2	10.71.176.16/28	10.71.176.17 – 10.71.176.30	10.71.176.31
3	10.71.176.32/28	10.71.176.33 – 10.71.176.46	10.71.176.47
4	10.71.176.48/28	10.71.176.49 – 10.71.176.62	10.71.176.63
5	10.71.176.64/28	10.71.176.65 – 10.71.176.78	10.71.176.79
6	10.71.176.80/28	10.71.176.81 – 10.71.176.94	10.71.176.95
7	10.71.176.96/28	10.71.176.97 – 10.71.176.110	10.71.176.111
8	10.71.176.112/28	10.71.176.113 – 10.71.176.126	10.71.176.127
9	10.71.176.128/28	10.71.176.129 – 10.71.176.142	10.71.176.143
10	10.71.176.144/28	10.71.176.145 – 10.71.176.158	10.71.176.159
11	10.71.176.160/28	10.71.176.161 – 10.71.176.174	10.71.176.175
12	10.71.176.176/28	10.71.176.177 – 10.71.176.190	10.71.176.191
13	10.71.176.192/28	10.71.176.193 – 10.71.176.206	10.71.176.207
14	10.71.176.208/28	10.71.176.209 – 10.71.176.222	10.71.176.223
15	10.71.176.224/28	10.71.176.225 – 10.71.176.238	10.71.176.239
16	10.71.176.240/28	10.71.176.241 – 10.71.176.254	10.71.176.255
17	10.71.177.0/28	10.71.177.1 – 10.71.177.14	10.71.177.15
18	10.71.177.16/28	10.71.177.17 – 10.71.177.30	10.71.177.31
19	10.71.177.32/28	10.71.177.33 – 10.71.177.46	10.71.177.47
20	10.71.177.48/28	10.71.177.49 – 10.71.177.62	10.71.177.63
21	10.71.177.64/28	10.71.177.65 – 10.71.177.78	10.71.177.79
22	10.71.177.80/28	10.71.177.81 – 10.71.177.94	10.71.177.95
23	10.71.177.96/28	10.71.177.97 – 10.71.177.110	10.71.177.111
24	10.71.177.112/28	10.71.177.113 – 10.71.177.126	10.71.177.127
25	10.71.177.128/28	10.71.177.129 – 10.71.177.142	10.71.177.143
26	10.71.177.144/28	10.71.177.145 – 10.71.177.158	10.71.177.159
27	10.71.177.160/28	10.71.177.161 – 10.71.177.174	10.71.177.175
28	10.71.177.176/28	10.71.177.177 – 10.71.177.190	10.71.177.191
29	10.71.177.192/28	10.71.177.193 – 10.71.177.206	10.71.177.207
30	10.71.177.208/28	10.71.177.209 – 10.71.177.222	10.71.177.223
31	10.71.177.224/28	10.71.177.225 – 10.71.177.238	10.71.177.239
32	10.71.177.240/28	10.71.177.241 – 10.71.177.254	10.71.177.255
33	10.71.178.0/28	10.71.178.1 – 10.71.178.14	10.71.178.15
34	10.71.178.16/28	10.71.178.17 – 10.71.178.30	10.71.178.31
35	10.71.178.32/28	10.71.178.33 – 10.71.178.46	10.71.178.47
36	10.71.178.48/28	10.71.178.49 – 10.71.178.62	10.71.178.63
37	10.71.178.64/28	10.71.178.65 – 10.71.178.78	10.71.178.79
38	10.71.178.80/28	10.71.178.81 – 10.71.178.94	10.71.178.95
39	10.71.178.96/28	10.71.178.97 – 10.71.178.110	10.71.178.111
40	10.71.178.112/28	10.71.178.113 – 10.71.178.126	10.71.178.127
41	10.71.178.128/28	10.71.178.129 – 10.71.178.142	10.71.178.143
42	10.71.178.144/28	10.71.178.145 – 10.71.178.158	10.71.178.159
43	10.71.178.160/28	10.71.178.161 – 10.71.178.174	10.71.178.175
44	10.71.178.176/28	10.71.178.177 – 10.71.178.190	10.71.178.191
45	10.71.178.192/28	10.71.178.193 – 10.71.178.206	10.71.178.207
46	10.71.178.208/28	10.71.178.209 – 10.71.178.222	10.71.178.223
47	10.71.178.224/28	10.71.178.225 – 10.71.178.238	10.71.178.239
48	10.71.178.240/28	10.71.178.241 – 10.71.178.254	10.71.178.255
49	10.71.179.0/28	10.71.179.1 – 10.71.179.14	10.71.179.15
50	10.71.179.16/28	10.71.179.17 – 10.71.179.30	10.71.179.31
51	10.71.179.32/28	10.71.179.33 – 10.71.179.46	10.71.179.47
52	10.71.179.48/28	10.71.179.49 – 10.71.179.62	10.71.179.63
53	10.71.179.64/28	10.71.179.65 – 10.71.179.78	10.71.179.79
54	10.71.179.80/28	10.71.179.81 – 10.71.179.94	10.71.179.95
55	10.71.179.96/28	10.71.179.97 – 10.71.179.110	10.71.179.111
56	10.71.179.112/28	10.71.179.113 – 10.71.179.126	10.71.179.127
57	10.71.179.128/28	10.71.179.129 – 10.71.179.142	10.71.179.143
58	10.71.179.144/28	10.71.179.145 – 10.71.179.158	10.71.179.159
59	10.71.179.160/28	10.71.179.161 – 10.71.179.174	10.71.179.175
60	10.71.179.176/28	10.71.179.177 – 10.71.179.190	10.71.179.191
61	10.71.179.192/28	10.71.179.193 – 10.71.179.206	10.71.179.207
62	10.71.179.208/28	10.71.179.209 – 10.71.179.222	10.71.179.223
63	10.71.179.224/28	10.71.179.225 – 10.71.179.238	10.71.179.239
64	10.71.179.240/28	10.71.179.241 – 10.71.179.254	10.71.179.255

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 →